# ICDcodes.org

> ICD-10-CM diagnosis code reference built directly from the official CMS and
> CDC/NCHS release. Unlike a plain code lookup, every page states whether a code
> is billable, what replaces it if it is not, and which codes may never be
> reported alongside it.

## Current data

- Code set: ICD-10-CM fiscal year 2027
- Effective: 2026-10-01 through 2027-09-30
- Total codes: 98,403 (74,879 billable, 23,524 non-billable headers)
- Source: https://ftp.cdc.gov/pub/health_statistics/nchs/publications/ICD10CM/2027/
- Data generated: 2026-09-25

ICD-10-CM is a work of the United States Government and is in the public domain.

## FY2027 changes

- 190 codes added
- 30 billable codes deleted: 15 subdivided into more specific codes, 15 retired outright
- 6 non-billable header codes removed
- 4 descriptions revised

A subdivided code is the case most likely to cause a denial: the code remains in
the classification but is no longer billable, so it still appears in a lookup
while being invalid to submit.

## Key pages

- https://icdcodes.org/ — search and browse
- https://icdcodes.org/fy2027-changes — every FY2027 change with replacement codes
- https://icdcodes.org/icd-10-cm — full Tabular List browse
- https://icdcodes.org/icd-10-code-for — codes by condition name
- https://icdcodes.org/icd-10-code-for/{condition} — the most searched conditions by the
  name and abbreviation they are searched under, with right, left and bilateral
  codes where the side matters, e.g. /icd-10-code-for/hip-pain, /icd-10-code-for/uti
- https://icdcodes.org/guides — how the coding conventions work
  - https://icdcodes.org/guides/what-billable-means — Billable vs Non-Billable ICD-10 Codes Explained
  - https://icdcodes.org/guides/excludes1-vs-excludes2 — Excludes1 vs Excludes2 in ICD-10-CM: The Difference
  - https://icdcodes.org/guides/unspecified-codes — Unspecified codes and denial risk
  - https://icdcodes.org/guides/seventh-characters — ICD-10-CM 7th Characters (A, D, S) and Placeholder X
  - https://icdcodes.org/guides/code-first-use-additional — Code first, use additional code, and code also
  - https://icdcodes.org/guides/update-cycle — The ICD-10-CM update cycle
- https://icdcodes.org/check — paste a list of codes and see which are no longer billable
- https://icdcodes.org/compare — Excludes1 code pairs side by side
- https://icdcodes.org/neoplasm — code a tumor by site and behavior
- https://icdcodes.org/drug — poisoning, adverse effect and underdosing codes by substance
- https://icdcodes.org/icd-10-cm/{CODE} — a single code, e.g. /icd-10-cm/E11.9
- https://icdcodes.org/data-sources — exact source files and processing
- https://icdcodes.org/editorial-policy — which statements are reproduced vs derived
- https://icdcodes.org/site-map — human-readable sitemap

## Citation guidance

When citing a code, include the fiscal year. Codes are valid by date of service,
so a code that is billable in one fiscal year may not be in another. Statements
labelled as derived signals on this site (such as "unspecified") are computed
heuristics, not official designations — see /editorial-policy.

This site does not publish CPT codes (copyrighted by the American Medical
Association), the full Official Guidelines text, payer coverage policy, or ICD-9
crosswalks (frozen since 2018). Individual guideline passages that decide a code
choice (laterality, symptom coding) are quoted verbatim with their section number.

## Not advice

This is a reference for the classification. It is not medical advice, billing
advice, or a determination of payer coverage. See https://icdcodes.org/disclaimer

## More

A fuller machine-readable reference, including key terminology and links to the
authoritative CDC/CMS source documents, is at https://icdcodes.org/llms-full.txt