ICD-10 Codes

Name: ICD-10 Codes MCP Server
Availability: InStock
Author: ICD-10 Codes

Healthcare6 toolsNo Auth Required

Look up, search and validate ICD-10-CM diagnosis and ICD-10-PCS procedure codes from your AI agent. 6 read-only tools, no sign-in, built and operated by Anthropic — code lookups from a published classification, never a coding recommendation.

Verified connector

Listed by Anthropic as an Anthropic-built connector in its Connectors Directory.

Connection checked by Agentman on 18 August 2026.

Anthropic states this reflects the level of review a connector received, not a security audit.

Connect ICD-10 Codes via MCP

https://hcls.mcp.claude.com/icd10_codes/mcp

Works in any MCP-compatible client. In Agentman Studio it is one click — no config file to edit.

ICD-10 Codes Tools & Capabilities (6)

lookup_codeRead-only

Look up a specific ICD-10 code by its code number. Returns full details including descriptions, HIPAA transaction validity status, and the fiscal years the code has appeared in (FY2026 code set; history tracked from FY2020 for diagnosis, FY2021 for procedure). Pass as_of with the encounter's date of service to check the code was in effect on that date — ICD-10 sets change every October 1. Codes retired from the current set still resolve, marked with the year they were retired.

search_codesRead-only

Search ICD-10-CM diagnosis and ICD-10-PCS procedure codes. Unified tool that supports searching by code or description. Use this for all ICD-10 search needs. Serves the FY2026 code set (in effect Oct 1 through Sep 30). Pass as_of with the encounter's date of service to annotate each result with whether it was in effect on that date — codes added after the date of service must not go on the claim.

validate_codeRead-only

Validate an ICD-10 code to check if it exists and is valid for HIPAA-covered transactions. Pass as_of with the encounter's date of service to also check the code was in effect on that date — ICD-10 sets change every October 1, and a code from the wrong fiscal year is not billable (current set: FY2026). Codes retired from the current set are reported as retired, with the years they were in effect.

get_hierarchyRead-only

Get the hierarchy of codes under a category. Returns the category header and up to `limit` child codes (default 500, max 2000) ordered by code; broad prefixes (e.g. a single-letter chapter) may be truncated. Use this to explore related codes within a disease category or code family.

get_by_categoryRead-only

Get diagnosis codes by ICD-10-CM chapter or category. Use chapter (single letter) for broad categories or category (3 characters) for specific disease groups. Useful for exploring codes within a clinical area.

get_by_body_systemRead-only

Get ICD-10-PCS procedure codes for a specific body system, optionally filtered by section. Body system is identified by the second character of the code for most sections (fourth character for Section F). Example: '0' for Central Nervous System (Section 0), '0' for Neurological System (Section F). Useful for finding all procedures related to an anatomical system.

Read from the server on 2026-08-18, including each tool's own safety annotations.

Limits

It answers about codes, never about people. No tool takes a clinical note, patient, encounter, provider, payer or claim parameter. The union of all inputs across all six tools is a code or query, a code-type and search-field selector, a HIPAA-validity filter, a limit, a prefix, a chapter or category, a body-system and section character, and an optional date of service. Do not paste patient information into a prompt — the connector has nowhere to put it.
Two different servers carry the ICD-10 name. This page describes Anthropic's connector at https://hcls.mcp.claude.com/icd10_codes/mcp. Agentman operates a separate ICD-10 Medical Coding server at https://mcp.agentman.ai/icd10/mcp with eleven differently-named tools. Setup instructions and tool names are not interchangeable between them.
US code sets only, one fiscal year at a time. ICD-10-CM and ICD-10-PCS are the United States clinical modification and procedure system. WHO's international ICD-10 is a different classification with different codes, and ICD-11 is a different revision entirely. Neither is served here, and neither are CPT or HCPCS.
FY2026, with FY2027 already published. The server reports the set in effect 1 October 2025 to 30 September 2026. CMS has published the FY2027 files effective 1 October 2026. Re-check what the server reports after that date rather than assuming continuity.
The October-only update claim is incomplete. Tool descriptions state the sets change every October 1. CMS also publishes April 1 update files, present for FY2024, FY2025 and FY2026. A mid-year revision can change what is billable inside a fiscal year.
as_of history is bounded. Diagnosis history runs from FY2020 and procedure history from FY2021. An encounter before those years cannot be date-checked through this connector.
HIPAA validity is not coverage. valid_for_hipaa_transactions distinguishes a billable code from a category header. It says nothing about whether a payer will reimburse, which depends on coverage policy, medical necessity and documentation that this server cannot see.
Results are capped and broad queries truncate. search_codes returns 20 by default and 200 at most; get_hierarchy returns 500 by default and 2,000 at most, and its description warns that broad prefixes may be truncated. Treat a chapter-level result set as a sample.
No combination checks, no guidelines, no crosswalks. The connector returns individual codes. It does not validate code pairs, return the ICD-10-CM Official Guidelines or the tabular list's instructional notes, or map between ICD-10 and ICD-9, ICD-11, CPT or HCPCS.
openWorldHint is absent on every tool. The server makes no statement about corpus openness in either direction. Anthropic's tutorial resolves the question — a stored database of published code sets — but that is documentation, not an annotation, and it is attributed as such.
The server's own instructions name tools that do not exist. Its initialize block advertises get_chapter and get_category in its tool-selection guide. Neither is on the live server; the real tools are get_by_category and get_by_body_system. An agent following the server's own guidance will call a tool that is not there.
The tutorial describes a superseded tool set. Anthropic's tutorial documents nine tools, including four separate search tools the server has consolidated into one. See Sources.
Anthropic calls the healthcare bundle experimental. Its own README states the plugin is provided as-is for evaluation against test or sandbox systems, is not validated for clinical use, is not a medical device, and should not drive patient-care or coverage decisions without qualified human review.
No tool writes anything. All six are annotated read-only, non-destructive and idempotent. The connector cannot submit a claim, amend a record or change the classification.
We did not call any tool. Our check was a read-only initialize and tools/list handshake. Everything above about tool behaviour comes from the server's own descriptions, schemas and instructions, plus Anthropic's published tutorial, plugin manifests and skill, plus CMS's and CDC's own pages. No code was looked up and no patient information exists anywhere in this work.

Frequently asked questions

Is this the same as the Agentman ICD-10 Medical Coding connector?

No. Two different servers share the ICD-10 name. This page describes Anthropic's connector at hcls.mcp.claude.com/icd10_codes/mcp, listed at anthropic tier with the six tools below. Agentman operates a separate ICD-10 Medical Coding server at mcp.agentman.ai/icd10/mcp with its own eleven tools under icd10_ prefixed names. Different operators, different endpoints, different tool sets.

Can the ICD-10 connector assign the right code for a patient encounter?

No. It looks codes up in a published classification and reports whether each one is valid for HIPAA transactions. No tool takes a clinical note, a patient, an encounter or a payer. Code assignment is a coding decision made by a qualified coder applying the ICD-10-CM Official Guidelines to documentation, and this connector supplies reference material for that work rather than performing it.

Which ICD-10 code sets does this connector actually serve?

Two United States code sets: ICD-10-CM for diagnoses and ICD-10-PCS for inpatient procedures. The server reports the FY2026 set, in effect from 1 October 2025 through 30 September 2026. It does not serve the World Health Organization's international ICD-10, which is a different classification, and it does not serve ICD-11, CPT, HCPCS or any other code system.

Does the ICD-10 Codes connector need a sign-in or an API key?

No. We opened an anonymous handshake against the endpoint on 2026-08-18 and it returned all six tool definitions with no credential of any kind. Anthropic's directory records the server as authless with a no_auth posture, and the host publishes no OAuth protected-resource descriptor at either the root or the path-suffixed location we probed.

How do I check a code was valid on the date of service?

Pass the encounter date to the as_of parameter, which lookup_code, search_codes and validate_code all accept as a YYYY-MM-DD string. The response then reports whether the code was in effect in the fiscal year covering that date. Coverage runs back to FY2020 for diagnosis codes and FY2021 for procedure codes, so older encounters cannot be checked this way.

Does a code being valid for HIPAA transactions mean the claim will be paid?

No, and the two questions are unrelated. The valid_for_hipaa_transactions flag says only that a code is a fully specified billable code rather than a category header. Whether a payer reimburses a claim depends on coverage policy, medical necessity, documentation and the plan, none of which this connector can see. It answers a classification question, not a payment question.

Do the ICD-10 code sets really only change on 1 October?

No. The connector's own tool descriptions say ICD-10 sets change every October 1, and that is the main annual update, but CMS also publishes mid-year files effective April 1. Its ICD-10 page carries April 1 updates for FY2024, FY2025 and FY2026. Treat the October date as the major revision and check CMS for interim changes before relying on a code set boundary.