Medical Code Registry

Browse the Medical Code Registry

Explore ICD-10-CM, HCPCS Level II, ICD-10-PCS, MS-DRG, clinical laboratory tests, the NDC directory, modifiers, the official ICD-10-CM indices and other MedCoder reference datasets, built from official CMS, CDC and FDA releases.

Search the registry

Know the code or the term? Search. Not sure of the exact code? Browse by code system below.

Browse by code system

Each registry is built from the named publisher’s official release. MedCoder does not publish or endorse these code sets; see Data Sources for the release in effect.

Diagnosis

ICD-10-CM

Diagnosis codes for diseases, conditions, symptoms, injuries and other reasons for healthcare encounters, browsed by chapter.

Source: CMS / CDC

Codes by Condition

Every ICD-10-CM code for a condition in one list, grouped by AHRQ CCSR clinical group — asthma, sepsis, depressive disorders and more.

Source: AHRQ

Official ICD-10-CM Indices

The four official alphabetic lookups: Index to Diseases and Injuries, External Causes of Injury, Table of Drugs and Chemicals, and Table of Neoplasms.

Source: CMS / CDC

Procedures & Supplies

HCPCS Level II

Codes for supplies, drugs, equipment, transport and other services outside the CPT code set, organized by CMS letter category.

Source: CMS

Modifiers

HCPCS Level II pricing and payment modifiers, each with its official CMS definition.

Source: CMS

Hospital Inpatient Coding

ICD-10-PCS

Inpatient procedure codes and the code tables they are built from, across the 17 CMS classification sections.

Source: CMS

MS-DRG

Medicare Severity Diagnosis Related Groups for inpatient payment, organized by the 25 Major Diagnostic Categories plus Pre-MDC.

Source: CMS

Coverage Policies

Medicare LCD Policy Search

Search Medicare Local Coverage Determinations by LCD number, title, policy text, ICD-10-CM code, state or MAC, with each LCD’s version history and CMS source. A policy reference, not a coverage decision.

Source: CMS

Medicare NCD Policy Search

Search National Coverage Determinations by section number, chapter, title, policy text or ICD-10-CM code, from the CMS NCD Manual and the laboratory NCD code lists. A policy reference, not a coverage decision.

Source: CMS

Drugs & Clinical Data

NDC Directory

FDA National Drug Code product listings, cross-referenced to their CMS HCPCS billing codes.

Source: FDA / CMS

Clinical Labs

Laboratory test reference pages linking each test to related ICD-10-CM codes, with a normal range only where a federal agency publishes one.

Source: NLM MedlinePlus

Coding Tools & Reference

Compare Two Codes

Check whether two ICD-10-CM codes can be reported together, with the official notes side by side.

Claim Check

Check a set of codes against Excludes1 conflicts, sequencing rules, Medicare Code Editor edits, and the supported NCCI, MUE, coverage-policy and MS-DRG grouping rules.

CMS Coding Rules

How MedCoder applies the CMS rules it holds: NCCI procedure-to-procedure edits, published MUE values, Medicare coverage policy and MS-DRG grouping — what each one reads, and what it cannot answer.

Coding Guides

Scenario guides to ICD-10-CM conventions: Excludes1 vs Excludes2, 7th characters, sequencing, and more.

Coding Questions

Coding decisions working coders ask about, answered from the official ICD-10-CM, ICD-10-PCS and HCPCS Level II sources.

Browse by ICD-10-CM chapter

The 22 chapters of the ICD-10-CM tabular list, A00 to U85. Open a chapter to see its code blocks, categories and codes.

Browse by condition

Frequently coded conditions, each listing every ICD-10-CM code in its AHRQ clinical group.

Browse by coding concept

The conventions, instructional notes and classifications coders ask about by name, each explained from its official source.