Reference data your billing team actually uses
Always-current CMS reference for medical billers and coders — free, fast, and no login required. Built and maintained by the team behind CareNiva's practice-management platform.
ICD-10-CM Codes
Look up any of 98,000+ diagnosis codes with descriptions and billable status.
OpenDenial Codes (CARC/RARC)
Decode claim adjustment reason codes and know exactly what to do next.
OpenMedicare Fees
Physician Fee Schedule amounts by CPT/HCPCS code, with MUE limits.
OpenNCCI Edits
Check procedure-to-procedure bundling edits before you bill.
OpenModifiers
CPT & HCPCS modifier reference with plain-English billing guidance.
OpenPlace of Service
POS codes for office, telehealth, home and every other care setting.
OpenTelehealth Codes
Which codes are on Medicare's telehealth list — place of service, modifier, audio-only.
OpenAnswer a coding question in seconds
Search and decode instantly — no spreadsheets, no logins.
Denial Code Decoder
Paste a CARC/RARC code and get the meaning plus next steps.
Medicare Fee Calculator
Estimate the Medicare allowed amount for a CPT/HCPCS code by locality.
NCCI Edit Checker
Check whether two procedure codes are bundled before you bill.
ICD-10 Lookup
Search 98,000+ diagnosis codes by code or keyword.
Code it right, then get paid faster
CareNiva pairs these free tools with a full practice-management and claims platform. Start free — ready in minutes.
100% Satisfaction Guaranteed — try it risk-free