CPT 33274: ICD-10 codes that support medical necessity
These ICD-10-CM diagnoses support medical necessity for CPT 33274 under Medicare coverage policies (LCDs, NCDs, and Billing & Coding articles). Billing CPT 33274 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 |
|---|---|
| G90.01 | Carotid sinus syncope |
| I44.0 | Atrioventricular block, first degree |
| I44.1 | Atrioventricular block, second degree |
| I44.2 | Atrioventricular block, complete |
| I44.30 | Unspecified atrioventricular block |
| I44.39 | Other atrioventricular block |
| I44.7 | Left bundle-branch block, unspecified |
| I45.10 | Unspecified right bundle-branch block |
| I45.19 | Other right bundle-branch block |
| I45.2 | Bifascicular block |
| I45.3 | Trifascicular block |
| I47.10 | Supraventricular tachycardia, unspecified |
| I47.11 | Inappropriate sinus tachycardia, so stated |
| I47.19 | Other supraventricular tachycardia |
| I47.9 | Paroxysmal tachycardia, unspecified |
| I48.0 | Paroxysmal atrial fibrillation |
| I48.11 | Longstanding persistent atrial fibrillation |
| I48.19 | Other persistent atrial fibrillation |
| I48.20 | Chronic atrial fibrillation, unspecified |
| I48.21 | Permanent atrial fibrillation |
| I48.3 | Typical atrial flutter |
| I48.4 | Atypical atrial flutter |
| I48.91 | Unspecified atrial fibrillation |
| I48.92 | Unspecified atrial flutter |
| I49.5 | Sick sinus syndrome |
| Q24.6 | Congenital heart block |
Frequently asked questions
Which ICD-10 codes support medical necessity for CPT 33274?
Medicare coverage policies (LCDs/NCDs and Billing & Coding articles) list 26 ICD-10 diagnosis codes that support medical necessity for CPT 33274. 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 33274 view of that relationship.
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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