ICD↔CPT crosswalk
CPT 45379: ICD-10 codes that support medical necessity
These ICD-10-CM diagnoses support medical necessity for CPT 45379 under Medicare coverage policies (LCDs, NCDs, and Billing & Coding articles). Billing CPT 45379 with a diagnosis that isn't covered typically denies as CARC 50 — not medically necessary.
National approximation. Coverage varies by MAC and state — confirm against the specific LCD/NCD and article that applies to your jurisdiction and date of service.
| ICD-10 | Description |
|---|---|
| A03.9 | Shigellosis, unspecified |
| A04.3 | Enterohemorrhagic Escherichia coli infection |
| A04.5 | Campylobacter enteritis |
| A04.6 | Enteritis due to Yersinia enterocolitica |
| A04.71 | Enterocolitis due to Clostridium difficile, recurrent |
| A04.72 | Enterocolitis due to Clostridium difficile, not specified as recurrent |
| A04.8 | Other specified bacterial intestinal infections |
| A04.9 | Bacterial intestinal infection, unspecified |
| A06.0 | Acute amebic dysentery |
| A06.1 | Chronic intestinal amebiasis |
| A06.2 | Amebic nondysenteric colitis |
| A06.9 | Amebiasis, unspecified |
| A07.0 | Balantidiasis |
| A07.3 | Isosporiasis |
| A07.8 | Other specified protozoal intestinal diseases |
| A08.0 | Rotaviral enteritis |
| A08.11 | Acute gastroenteropathy due to Norwalk agent |
| A08.19 | Acute gastroenteropathy due to other small round viruses |
| A08.2 | Adenoviral enteritis |
| A08.31 | Calicivirus enteritis |
| A08.32 | Astrovirus enteritis |
| A08.39 | Other viral enteritis |
| A09 | Infectious gastroenteritis and colitis, unspecified |
| A18.31 | Tuberculous peritonitis |
| A18.32 | Tuberculous enteritis |
| A18.39 | Retroperitoneal tuberculosis |
| A18.83 | Tuberculosis of digestive tract organs, not elsewhere classified |
| A41.01 | Sepsis due to Methicillin susceptible Staphylococcus aureus |
| A41.02 | Sepsis due to Methicillin resistant Staphylococcus aureus |
| A41.4 | Sepsis due to anaerobes |
| A41.50 | Gram-negative sepsis, unspecified |
| A41.51 | Sepsis due to Escherichia coli [E. coli] |
| A41.52 | Sepsis due to Pseudomonas |
| A41.53 | Sepsis due to Serratia |
| A41.54 | Sepsis due to Acinetobacter baumannii |
| A41.59 | Other Gram-negative sepsis |
| A41.81 | Sepsis due to Enterococcus |
| A41.89 | Other specified sepsis |
| A42.7 | Actinomycotic sepsis |
| A54.6 | Gonococcal infection of anus and rectum |
| A55 | Chlamydial lymphogranuloma (venereum) |
| B20 | Human immunodeficiency virus [HIV] disease |
| B37.82 | Candidal enteritis |
| B65.1 | Schistosomiasis due to Schistosoma mansoni [intestinal schistosomiasis] |
| B68.0 | Taenia solium taeniasis |
| B68.1 | Taenia saginata taeniasis |
| B68.9 | Taeniasis, unspecified |
| B70.0 | Diphyllobothriasis |
| B71.0 | Hymenolepiasis |
| B71.1 | Dipylidiasis |
| B71.8 | Other specified cestode infections |
| B76.8 | Other hookworm diseases |
| B76.9 | Hookworm disease, unspecified |
| B77.0 | Ascariasis with intestinal complications |
| B77.81 | Ascariasis pneumonia |
| B77.89 | Ascariasis with other complications |
| B77.9 | Ascariasis, unspecified |
| B78.0 | Intestinal strongyloidiasis |
| B78.7 | Disseminated strongyloidiasis |
| B78.9 | Strongyloidiasis, unspecified |
| B79 | Trichuriasis |
| B80 | Enterobiasis |
| B82.0 | Intestinal helminthiasis, unspecified |
| B82.9 | Intestinal parasitism, unspecified |
| B83.9 | Helminthiasis, unspecified |
| B95.1 | Streptococcus, group B, as the cause of diseases classified elsewhere |
| B95.2 | Enterococcus as the cause of diseases classified elsewhere |
| C17.2 | Malignant neoplasm of ileum |
| C18.0 | Malignant neoplasm of cecum |
| C18.1 | Malignant neoplasm of appendix |
| C18.2 | Malignant neoplasm of ascending colon |
| C18.3 | Malignant neoplasm of hepatic flexure |
| C18.4 | Malignant neoplasm of transverse colon |
| C18.5 | Malignant neoplasm of splenic flexure |
| C18.6 | Malignant neoplasm of descending colon |
| C18.7 | Malignant neoplasm of sigmoid colon |
| C18.8 | Malignant neoplasm of overlapping sites of colon |
| C18.9 | Malignant neoplasm of colon, unspecified |
| C19 | Malignant neoplasm of rectosigmoid junction |
| C20 | Malignant neoplasm of rectum |
| C21.0 | Malignant neoplasm of anus, unspecified |
| C21.1 | Malignant neoplasm of anal canal |
| C21.2 | Malignant neoplasm of cloacogenic zone |
| C21.8 | Malignant neoplasm of overlapping sites of rectum, anus and anal canal |
| C26.0 | Malignant neoplasm of intestinal tract, part unspecified |
| C26.9 | Malignant neoplasm of ill-defined sites within the digestive system |
| C45.1 | Mesothelioma of peritoneum |
| C46.4 | Kaposi's sarcoma of gastrointestinal sites |
| C48.1 | Malignant neoplasm of specified parts of peritoneum |
| C48.2 | Malignant neoplasm of peritoneum, unspecified |
| C48.8 | Malignant neoplasm of overlapping sites of retroperitoneum and peritoneum |
| C49.4 | Malignant neoplasm of connective and soft tissue of abdomen |
| C49.A3 | Gastrointestinal stromal tumor of small intestine |
| C49.A4 | Gastrointestinal stromal tumor of large intestine |
| C49.A5 | Gastrointestinal stromal tumor of rectum |
| C49.A9 | Gastrointestinal stromal tumor of other sites |
| C76.2 | Malignant neoplasm of abdomen |
| C76.3 | Malignant neoplasm of pelvis |
| C77.2 | Secondary and unspecified malignant neoplasm of intra-abdominal lymph nodes |
| C78.4 | Secondary malignant neoplasm of small intestine |
| C78.5 | Secondary malignant neoplasm of large intestine and rectum |
| C78.6 | Secondary malignant neoplasm of retroperitoneum and peritoneum |
| C78.7 | Secondary malignant neoplasm of liver and intrahepatic bile duct |
| C7A.00 | Malignant carcinoid tumor of unspecified site |
| C7A.010 | Malignant carcinoid tumor of the duodenum |
| C7A.011 | Malignant carcinoid tumor of the jejunum |
| C7A.012 | Malignant carcinoid tumor of the ileum |
| C7A.019 | Malignant carcinoid tumor of the small intestine, unspecified portion |
| C7A.020 | Malignant carcinoid tumor of the appendix |
| C7A.021 | Malignant carcinoid tumor of the cecum |
| C7A.022 | Malignant carcinoid tumor of the ascending colon |
| C7A.023 | Malignant carcinoid tumor of the transverse colon |
| C7A.024 | Malignant carcinoid tumor of the descending colon |
| C7A.025 | Malignant carcinoid tumor of the sigmoid colon |
| C7A.026 | Malignant carcinoid tumor of the rectum |
| C7A.029 | Malignant carcinoid tumor of the large intestine, unspecified portion |
| C7A.096 | Malignant carcinoid tumor of the hindgut, unspecified |
| C7A.098 | Malignant carcinoid tumors of other sites |
| C7A.1 | Malignant poorly differentiated neuroendocrine tumors |
| C7A.8 | Other malignant neuroendocrine tumors |
| C7B.04 | Secondary carcinoid tumors of peritoneum |
| C7B.09 | Secondary carcinoid tumors of other sites |
| C7B.1 | Secondary Merkel cell carcinoma |
| C7B.8 | Other secondary neuroendocrine tumors |
| C80.0 | Disseminated malignant neoplasm, unspecified |
| C80.2 | Malignant neoplasm associated with transplanted organ |
| C82.09 | Follicular lymphoma grade I, extranodal and solid organ sites |
| C82.19 | Follicular lymphoma grade II, extranodal and solid organ sites |
| C82.29 | Follicular lymphoma grade III, unspecified, extranodal and solid organ sites |
| C82.39 | Follicular lymphoma grade IIIa, extranodal and solid organ sites |
| C82.49 | Follicular lymphoma grade IIIb, extranodal and solid organ sites |
| C82.89 | Other types of follicular lymphoma, extranodal and solid organ sites |
| C82.99 | Follicular lymphoma, unspecified, extranodal and solid organ sites |
| C83.398 | Diffuse large B-cell lymphoma of other extranodal and solid organ sites |
| C88.40 | Extranodal marginal zone B-cell lymphoma of mucosa-associated lymphoid tissue [MALT-lymphoma] not having achieved remission |
| D00.1 | Carcinoma in situ of esophagus |
| D00.2 | Carcinoma in situ of stomach |
| D01.0 | Carcinoma in situ of colon |
| D01.1 | Carcinoma in situ of rectosigmoid junction |
| D01.2 | Carcinoma in situ of rectum |
| D01.3 | Carcinoma in situ of anus and anal canal |
| D12.0 | Benign neoplasm of cecum |
| D12.1 | Benign neoplasm of appendix |
| D12.2 | Benign neoplasm of ascending colon |
| D12.3 | Benign neoplasm of transverse colon |
| D12.4 | Benign neoplasm of descending colon |
| D12.5 | Benign neoplasm of sigmoid colon |
| D12.6 | Benign neoplasm of colon, unspecified |
| D12.7 | Benign neoplasm of rectosigmoid junction |
| D12.8 | Benign neoplasm of rectum |
| D12.9 | Benign neoplasm of anus and anal canal |
| D13.91 | Familial adenomatous polyposis |
| D17.5 | Benign lipomatous neoplasm of intra-abdominal organs |
| D17.71 | Benign lipomatous neoplasm of kidney |
| D17.79 | Benign lipomatous neoplasm of other sites |
| D18.03 | Hemangioma of intra-abdominal structures |
| D18.1 | Lymphangioma, any site |
| D37.1 | Neoplasm of uncertain behavior of stomach |
| D37.2 | Neoplasm of uncertain behavior of small intestine |
| D37.3 | Neoplasm of uncertain behavior of appendix |
| D37.4 | Neoplasm of uncertain behavior of colon |
| D37.5 | Neoplasm of uncertain behavior of rectum |
| D37.8 | Neoplasm of uncertain behavior of other specified digestive organs |
| D37.9 | Neoplasm of uncertain behavior of digestive organ, unspecified |
| D3A.00 | Benign carcinoid tumor of unspecified site |
| D3A.010 | Benign carcinoid tumor of the duodenum |
| D3A.011 | Benign carcinoid tumor of the jejunum |
| D3A.012 | Benign carcinoid tumor of the ileum |
| D3A.019 | Benign carcinoid tumor of the small intestine, unspecified portion |
| D3A.020 | Benign carcinoid tumor of the appendix |
| D3A.021 | Benign carcinoid tumor of the cecum |
| D3A.022 | Benign carcinoid tumor of the ascending colon |
| D3A.023 | Benign carcinoid tumor of the transverse colon |
| D3A.024 | Benign carcinoid tumor of the descending colon |
| D3A.025 | Benign carcinoid tumor of the sigmoid colon |
| D3A.026 | Benign carcinoid tumor of the rectum |
| D3A.029 | Benign carcinoid tumor of the large intestine, unspecified portion |
| D3A.096 | Benign carcinoid tumor of the hindgut, unspecified |
| D3A.8 | Other benign neuroendocrine tumors |
| D49.0 | Neoplasm of unspecified behavior of digestive system |
| D50.0 | Iron deficiency anemia secondary to blood loss (chronic) |
| D50.9 | Iron deficiency anemia, unspecified |
| D62 | Acute posthemorrhagic anemia |
| E34.00 | Carcinoid syndrome, unspecified |
| E34.01 | Carcinoid heart syndrome |
| E34.09 | Other carcinoid syndrome |
| E44.0 | Moderate protein-calorie malnutrition |
| I33.0 | Acute and subacute infective endocarditis |
| I77.2 | Rupture of artery |
| I78.0 | Hereditary hemorrhagic telangiectasia |
| I86.4 | Gastric varices |
| K35.80 | Unspecified acute appendicitis |
| K35.890 | Other acute appendicitis without perforation or gangrene |
| K35.891 | Other acute appendicitis without perforation, with gangrene |
| K38.0 | Hyperplasia of appendix |
| K38.1 | Appendicular concretions |
| K38.2 | Diverticulum of appendix |
| K38.3 | Fistula of appendix |
| K38.8 | Other specified diseases of appendix |
| K38.9 | Disease of appendix, unspecified |
| K50.00 | Crohn's disease of small intestine without complications |
| K50.011 | Crohn's disease of small intestine with rectal bleeding |
| K50.012 | Crohn's disease of small intestine with intestinal obstruction |
| K50.013 | Crohn's disease of small intestine with fistula |
| K50.014 | Crohn's disease of small intestine with abscess |
| K50.018 | Crohn's disease of small intestine with other complication |
| K50.019 | Crohn's disease of small intestine with unspecified complications |
| K50.10 | Crohn's disease of large intestine without complications |
| K50.111 | Crohn's disease of large intestine with rectal bleeding |
| K50.112 | Crohn's disease of large intestine with intestinal obstruction |
| K50.113 | Crohn's disease of large intestine with fistula |
| K50.114 | Crohn's disease of large intestine with abscess |
| K50.118 | Crohn's disease of large intestine with other complication |
| K50.119 | Crohn's disease of large intestine with unspecified complications |
| K50.80 | Crohn's disease of both small and large intestine without complications |
| K50.811 | Crohn's disease of both small and large intestine with rectal bleeding |
| K50.812 | Crohn's disease of both small and large intestine with intestinal obstruction |
| K50.813 | Crohn's disease of both small and large intestine with fistula |
| K50.814 | Crohn's disease of both small and large intestine with abscess |
| K50.818 | Crohn's disease of both small and large intestine with other complication |
| K50.819 | Crohn's disease of both small and large intestine with unspecified complications |
| K50.90 | Crohn's disease, unspecified, without complications |
| K50.911 | Crohn's disease, unspecified, with rectal bleeding |
| K50.912 | Crohn's disease, unspecified, with intestinal obstruction |
| K50.913 | Crohn's disease, unspecified, with fistula |
| K50.914 | Crohn's disease, unspecified, with abscess |
| K50.918 | Crohn's disease, unspecified, with other complication |
| K50.919 | Crohn's disease, unspecified, with unspecified complications |
| K51.00 | Ulcerative (chronic) pancolitis without complications |
| K51.011 | Ulcerative (chronic) pancolitis with rectal bleeding |
| K51.012 | Ulcerative (chronic) pancolitis with intestinal obstruction |
| K51.013 | Ulcerative (chronic) pancolitis with fistula |
| K51.014 | Ulcerative (chronic) pancolitis with abscess |
| K51.018 | Ulcerative (chronic) pancolitis with other complication |
| K51.019 | Ulcerative (chronic) pancolitis with unspecified complications |
| K51.20 | Ulcerative (chronic) proctitis without complications |
| K51.211 | Ulcerative (chronic) proctitis with rectal bleeding |
| K51.212 | Ulcerative (chronic) proctitis with intestinal obstruction |
| K51.213 | Ulcerative (chronic) proctitis with fistula |
| K51.214 | Ulcerative (chronic) proctitis with abscess |
| K51.218 | Ulcerative (chronic) proctitis with other complication |
| K51.219 | Ulcerative (chronic) proctitis with unspecified complications |
| K51.30 | Ulcerative (chronic) rectosigmoiditis without complications |
| K51.311 | Ulcerative (chronic) rectosigmoiditis with rectal bleeding |
| K51.312 | Ulcerative (chronic) rectosigmoiditis with intestinal obstruction |
| K51.313 | Ulcerative (chronic) rectosigmoiditis with fistula |
| K51.314 | Ulcerative (chronic) rectosigmoiditis with abscess |
| K51.318 | Ulcerative (chronic) rectosigmoiditis with other complication |
| K51.319 | Ulcerative (chronic) rectosigmoiditis with unspecified complications |
| K51.40 | Inflammatory polyps of colon without complications |
| K51.411 | Inflammatory polyps of colon with rectal bleeding |
| K51.412 | Inflammatory polyps of colon with intestinal obstruction |
| K51.413 | Inflammatory polyps of colon with fistula |
| K51.414 | Inflammatory polyps of colon with abscess |
| K51.418 | Inflammatory polyps of colon with other complication |
| K51.419 | Inflammatory polyps of colon with unspecified complications |
| K51.50 | Left sided colitis without complications |
| K51.511 | Left sided colitis with rectal bleeding |
| K51.512 | Left sided colitis with intestinal obstruction |
| K51.513 | Left sided colitis with fistula |
| K51.514 | Left sided colitis with abscess |
| K51.518 | Left sided colitis with other complication |
| K51.519 | Left sided colitis with unspecified complications |
| K51.80 | Other ulcerative colitis without complications |
| K51.811 | Other ulcerative colitis with rectal bleeding |
| K51.812 | Other ulcerative colitis with intestinal obstruction |
| K51.813 | Other ulcerative colitis with fistula |
| K51.814 | Other ulcerative colitis with abscess |
| K51.818 | Other ulcerative colitis with other complication |
| K51.819 | Other ulcerative colitis with unspecified complications |
| K51.90 | Ulcerative colitis, unspecified, without complications |
| K51.911 | Ulcerative colitis, unspecified with rectal bleeding |
| K51.912 | Ulcerative colitis, unspecified with intestinal obstruction |
| K51.913 | Ulcerative colitis, unspecified with fistula |
| K51.914 | Ulcerative colitis, unspecified with abscess |
| K51.918 | Ulcerative colitis, unspecified with other complication |
| K51.919 | Ulcerative colitis, unspecified with unspecified complications |
| K52.0 | Gastroenteritis and colitis due to radiation |
| K52.1 | Toxic gastroenteritis and colitis |
| K52.21 | Food protein-induced enterocolitis syndrome |
| K52.22 | Food protein-induced enteropathy |
| K52.29 | Other allergic and dietetic gastroenteritis and colitis |
| K52.3 | Indeterminate colitis |
| K52.81 | Eosinophilic gastritis or gastroenteritis |
| K52.82 | Eosinophilic colitis |
| K52.831 | Collagenous colitis |
| K52.832 | Lymphocytic colitis |
| K52.838 | Other microscopic colitis |
| K52.839 | Microscopic colitis, unspecified |
| K52.89 | Other specified noninfective gastroenteritis and colitis |
| K52.9 | Noninfective gastroenteritis and colitis, unspecified |
| K55.011 | Focal (segmental) acute (reversible) ischemia of small intestine |
| K55.012 | Diffuse acute (reversible) ischemia of small intestine |
| K55.019 | Acute (reversible) ischemia of small intestine, extent unspecified |
| K55.021 | Focal (segmental) acute infarction of small intestine |
| K55.022 | Diffuse acute infarction of small intestine |
| K55.029 | Acute infarction of small intestine, extent unspecified |
| K55.031 | Focal (segmental) acute (reversible) ischemia of large intestine |
| K55.032 | Diffuse acute (reversible) ischemia of large intestine |
| K55.039 | Acute (reversible) ischemia of large intestine, extent unspecified |
| K55.041 | Focal (segmental) acute infarction of large intestine |
| K55.042 | Diffuse acute infarction of large intestine |
| K55.049 | Acute infarction of large intestine, extent unspecified |
| K55.051 | Focal (segmental) acute (reversible) ischemia of intestine, part unspecified |
| K55.052 | Diffuse acute (reversible) ischemia of intestine, part unspecified |
| K55.059 | Acute (reversible) ischemia of intestine, part and extent unspecified |
| K55.061 | Focal (segmental) acute infarction of intestine, part unspecified |
| K55.062 | Diffuse acute infarction of intestine, part unspecified |
| K55.069 | Acute infarction of intestine, part and extent unspecified |
| K55.1 | Chronic vascular disorders of intestine |
| K55.20 | Angiodysplasia of colon without hemorrhage |
| K55.21 | Angiodysplasia of colon with hemorrhage |
| K55.30 | Necrotizing enterocolitis, unspecified |
| K55.31 | Stage 1 necrotizing enterocolitis |
| K55.32 | Stage 2 necrotizing enterocolitis |
| K55.33 | Stage 3 necrotizing enterocolitis |
| K55.8 | Other vascular disorders of intestine |
| K55.9 | Vascular disorder of intestine, unspecified |
| K56.0 | Paralytic ileus |
| K56.1 | Intussusception |
| K56.2 | Volvulus |
| K56.3 | Gallstone ileus |
| K56.41 | Fecal impaction |
| K56.49 | Other impaction of intestine |
| K56.50 | Intestinal adhesions [bands], unspecified as to partial versus complete obstruction |
| K56.51 | Intestinal adhesions [bands], with partial obstruction |
| K56.52 | Intestinal adhesions [bands] with complete obstruction |
| K56.600 | Partial intestinal obstruction, unspecified as to cause |
| K56.601 | Complete intestinal obstruction, unspecified as to cause |
| K56.609 | Unspecified intestinal obstruction, unspecified as to partial versus complete obstruction |
| K56.690 | Other partial intestinal obstruction |
| K56.691 | Other complete intestinal obstruction |
| K56.699 | Other intestinal obstruction unspecified as to partial versus complete obstruction |
| K56.7 | Ileus, unspecified |
| K57.00 | Diverticulitis of small intestine with perforation and abscess without bleeding |
| K57.01 | Diverticulitis of small intestine with perforation and abscess with bleeding |
| K57.10 | Diverticulosis of small intestine without perforation or abscess without bleeding |
| K57.11 | Diverticulosis of small intestine without perforation or abscess with bleeding |
| K57.20 | Diverticulitis of large intestine with perforation and abscess without bleeding |
| K57.21 | Diverticulitis of large intestine with perforation and abscess with bleeding |
| K57.30 | Diverticulosis of large intestine without perforation or abscess without bleeding |
| K57.31 | Diverticulosis of large intestine without perforation or abscess with bleeding |
| K57.32 | Diverticulitis of large intestine without perforation or abscess without bleeding |
| K57.33 | Diverticulitis of large intestine without perforation or abscess with bleeding |
| K57.40 | Diverticulitis of both small and large intestine with perforation and abscess without bleeding |
| K57.41 | Diverticulitis of both small and large intestine with perforation and abscess with bleeding |
| K57.50 | Diverticulosis of both small and large intestine without perforation or abscess without bleeding |
| K57.51 | Diverticulosis of both small and large intestine without perforation or abscess with bleeding |
| K57.52 | Diverticulitis of both small and large intestine without perforation or abscess without bleeding |
| K57.53 | Diverticulitis of both small and large intestine without perforation or abscess with bleeding |
| K57.80 | Diverticulitis of intestine, part unspecified, with perforation and abscess without bleeding |
| K57.81 | Diverticulitis of intestine, part unspecified, with perforation and abscess with bleeding |
| K57.90 | Diverticulosis of intestine, part unspecified, without perforation or abscess without bleeding |
| K57.91 | Diverticulosis of intestine, part unspecified, without perforation or abscess with bleeding |
| K57.92 | Diverticulitis of intestine, part unspecified, without perforation or abscess without bleeding |
| K57.93 | Diverticulitis of intestine, part unspecified, without perforation or abscess with bleeding |
| K58.0 | Irritable bowel syndrome with diarrhea |
| K58.1 | Irritable bowel syndrome with constipation |
| K58.2 | Mixed irritable bowel syndrome |
| K58.8 | Other irritable bowel syndrome |
| K58.9 | Irritable bowel syndrome, unspecified |
| K59.00 | Constipation, unspecified |
| K59.01 | Slow transit constipation |
| K59.02 | Outlet dysfunction constipation |
| K59.03 | Drug induced constipation |
| K59.04 | Chronic idiopathic constipation |
| K59.09 | Other constipation |
| K59.1 | Functional diarrhea |
| K59.2 | Neurogenic bowel, not elsewhere classified |
| K59.31 | Toxic megacolon |
| K59.39 | Other megacolon |
| K59.4 | Anal spasm |
| K59.81 | Ogilvie syndrome |
| K59.89 | Other specified functional intestinal disorders |
| K60.30 | Anal fistula, unspecified |
| K60.311 | Anal fistula, simple, initial |
| K60.312 | Anal fistula, simple, persistent |
| K60.313 | Anal fistula, simple, recurrent |
| K60.319 | Anal fistula, simple, unspecified |
| K60.321 | Anal fistula, complex, initial |
| K60.322 | Anal fistula, complex, persistent |
| K60.323 | Anal fistula, complex, recurrent |
| K60.329 | Anal fistula, complex, unspecified |
| K60.40 | Rectal fistula, unspecified |
| K60.411 | Rectal fistula, simple, initial |
| K60.412 | Rectal fistula, simple, persistent |
| K60.413 | Rectal fistula, simple, recurrent |
| K60.419 | Rectal fistula, simple, unspecified |
| K60.421 | Rectal fistula, complex, initial |
| K60.422 | Rectal fistula, complex, persistent |
| K60.423 | Rectal fistula, complex, recurrent |
| K60.429 | Rectal fistula, complex, unspecified |
| K60.50 | Anorectal fistula, unspecified |
| K60.511 | Anorectal fistula, simple, initial |
| K60.512 | Anorectal fistula, simple, persistent |
| K60.513 | Anorectal fistula, simple, recurrent |
| K60.519 | Anorectal fistula, simple, unspecified |
| K60.521 | Anorectal fistula, complex, initial |
| K60.522 | Anorectal fistula, complex, persistent |
| K60.523 | Anorectal fistula, complex, recurrent |
Showing the first 400 of 712 covered codes — this procedure has a large covered-diagnosis set; see the governing LCD/article for the complete list.
Frequently asked questions
Which ICD-10 codes support medical necessity for CPT 45379?
Medicare coverage policies (LCDs/NCDs and Billing & Coding articles) list 712 ICD-10 diagnosis codes that support medical necessity for CPT 45379. The covered codes are listed on this page. Coverage varies by MAC/state — always confirm against the policy that applies to you.
What is a medical-necessity (LCD/NCD) crosswalk?
A claim whose procedure isn't supported by a covered diagnosis denies as "not medically necessary" (CARC 50). CMS coverage policies define which diagnoses justify a procedure; this page is the ICD-10 → CPT 45379 view of that relationship.
Catch medical-necessity denials before you bill. CareNiva scrubs claims against LCD/NCD coverage and flags unsupported diagnoses — in the same platform you run visits and billing.
More free billing tools: all crosswalks · NCCI edits · Medicare fees · denial codes
Informational only, not coding, billing, or legal advice. Based on CMS Medicare Coverage Database data; verify the current LCD/NCD for your MAC before billing.
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