M76.6 ICD-10-CM Code: Achilles tendinitis

Coding instructions

Official Tabular Instructional Notes: the inclusion, exclusion and sequencing notes published for M76.6 in the official ICD-10-CM tabular list, quoted as published.

Source: CMS/CDC — ICD-10-CM Tabular ListRelease: FY2026Effective: October 1, 2025

Notes without a marker are published on M76.6 itself; “inherited from” names the category or block whose note applies here.

Coder workflow for M76.6

MedCoder structured workflow — derived from this code’s own official record

Before you code M76.6

1. M76.6 is not reportable as written. Select the more specific code beneath it that the documentation supports. Codes are reported to the highest level of specificity the classification provides (Guidelines I.B.2).

   ReviewM76.60, M76.61, M76.62

   See the relationships section · Guide: How to choose an ICD-10-CM code →

Choose the right path

1. Does the documentation support one of the more specific codes beneath M76.6?
   Yes → Select that code and continue the checks below on its own page.
   No → M76.6 cannot be reported as written; query for the specificity its subcategory needs.

   ReviewM76.60, M76.61, M76.62

Consider M76.6. Then confirm the code is valid for the date of service in the Verify section.

Documentation check

The provider’s diagnostic statement

Codes are assigned from the provider’s documented diagnosis, not from clinical criteria, test values or a medication list (Guidelines I.A.19).

Official instructions as workflow

• Excludes2 — not part of M76.6(2 notes)

  Coding workflow: The conditions named in this note are not included in M76.6. When the record documents both, both may be reported; the note is a boundary, not a prohibition.

  CompareM70, M77.5

  See the official tabular notes · Guidelines I.A.12.b

Every row is derived from this code’s own record — its title, tabular notes, 7th-character family and same-category siblings — with fixed MedCoder wording; nothing is inferred about a patient. The official notes and guideline text are in the sections each row links to, and they control.

Don’t confuse M76.6 with…

MedCoder analysis — pairs from this code’s official notes, distinctions written by MedCoder

The codes most likely to be picked instead of M76.6 — named in its own official notes, or sharing its laterality or encounter family — with what separates them and which documentation moves the case. Each links to the full comparison.

• M70— Excludes2 relationship (Informational)

  Distinct conditions — both may be reported.

  A distinct condition — both may be reported when both are documented.

  What moves you there: Documentation of bursitis due to use, overuse and pressure adds M70; it is not part of this code and both may be reported when both are documented.

  Full comparison: M76.6 vs M70 →

• M77.5— Excludes2 relationship (Informational)

  Distinct conditions — both may be reported.

  A distinct condition — both may be reported when both are documented.

  What moves you there: Documentation of enthesopathies of ankle and foot adds M77.5; it is not part of this code and both may be reported when both are documented.

  Full comparison: M76.6 vs M77.5 →

Relationships are read from this code's own official notes, its laterality siblings and its encounter family; the wording of each distinction is MedCoder editorial, and the documentation named in each “what moves you there” line is the official note phrase or sibling title itself. Source: CMS ICD-10-CM tabular instructional notes; ICD-10-CM Official Guidelines, Section I.A.12.a.

Verify Before Coding

• Not billable as written — a more specific code is required: M76.60, M76.61, M76.62.

From the code registry, the Medicare Code Editor, and the MS-DRG Definitions Manual. Check it against a full claim in Claim Check.

Relationships & Classification

MedCoder structured relationships — computed from published CMS and AHRQ datasets

Other codes that name M76.6 or its code family, from the CMS ICD-10-CM tabular instructional notes. Tabular-note edges are stored at the code family level that carries each note.

Referenced by 2 Excludes1 notes: M65.2 — Calcific tendinitis (via M76.-), M71 — Other bursopathies (via M76.-).

These codes’ tabular lists mark this diagnosis as mutually exclusive — not reported together unless the conditions are documented as unrelated.

Referenced by 1 Excludes2 note: M70 — Soft tissue disorders related to use, overuse and pressure (via M76.-).

These codes’ tabular lists name this diagnosis as distinct — both may be reported when both are documented.

Related Codes

Same Index main term, other category

The ICD-10-CM Index to Diseases and Injuries files this code under the main term “Tendinitis, tendonitis”; these codes share that main term but sit in a different category of the Tabular List.

M65.2 — Calcific tendinitis (calcific), M65.22 — Calcific tendinitis, upper arm (calcific, upper arm), M65.23 — Calcific tendinitis, forearm (calcific, forearm), M65.24 — Calcific tendinitis, hand (calcific, hand), M65.25 — Calcific tendinitis, thigh (calcific, thigh), M65.26 — Calcific tendinitis, lower leg (calcific, lower leg), M65.27 — Calcific tendinitis, ankle and foot (calcific, foot), M65.28 — Calcific tendinitis, other site (calcific, specified site NEC), M65.29 — Calcific tendinitis, multiple sites (calcific, multiple sites), M75.2 — Bicipital tendinitis (bicipital), M75.3 — Calcific tendinitis of shoulder (calcific, shoulder)

Contextual Map

Every relationship of M76.6 in one view: hierarchy, official tabular instructions in both directions, clinical classification, risk adjustment, MS-DRG participation, index terms and change history — each edge carrying the CMS source it derives from.

Run M76.6 with these 3 related codes in Claim Check

Hierarchy

• M00-M99 — Chapter 13: Diseases of the Musculoskeletal System and Connective Tissue (M00-M99) (M00-M99)[Hierarchy]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• M70-M79 — Other soft tissue disorders[Hierarchy]— CMS ICD-10-CM tabular structure · icd10cm-fy2026

Referenced by Excludes1 notes

• M65.2 — Calcific tendinitis[Excludes1](via M76.-): “tendinitis as classified in M75-M77”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• M71 — Other bursopathies[Excludes1](via M76.-): “enthesopathies (M76-M77)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026

Referenced by Excludes2 notes

• M70 — Soft tissue disorders related to use, overuse and pressure[Excludes2](via M76.-): “enthesopathies (M76-M77)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026

Nearest codes (40)

• M76 — Enthesopathies, lower limb, excluding foot[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• M76.1 — Psoas tendinitis[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• M76.10 — Psoas tendinitis, unspecified hip[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• M76.11 — Psoas tendinitis, right hip[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• M76.12 — Psoas tendinitis, left hip[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• M76.2 — Iliac crest spur[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• M76.20 — Iliac crest spur, unspecified hip[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• M76.21 — Iliac crest spur, right hip[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• and 32 more

Change history

• FY2016 — In the code set at ICD-10-CM adoption [Change history]— CMS release files (code change ledger) · icd10cm-fy2016

Common coding questions

Sources for this page

Codes, titles, notes, index terms and mappings on this page are transcribed from the datasets below. Relationships MedCoder computed and text MedCoder wrote are labelled where they appear.

Code, title, tabular notes and index terms Official source data

CMS/CDC ICD-10-CM FY2026 tabular list, index and tables, effective October 1, 2025 Release, file and checksum · Publisher’s page

Claim edits Official source data

CMS Definitions of Medicare Code Edits — v43.1 (April 2026) Release, file and checksum · Publisher’s page

Change history and date-of-service validity Official source data

CMS ICD-10-CM release addenda, ingested release by release into the change ledger Release, file and checksum · Publisher’s page

Comparisons, relationships and the contextual map MedCoder structured relationship

Computed by MedCoder from the tabular notes and tables above; every derived relationship is marked as derived where it appears

Summary and FAQ answers MedCoder explanation

Written by MedCoder to explain the sources above: drafted with AI assistance, checked by a person against the release files, and labelled as MedCoder text where it appears. Not official text.

Labels on this page: Official source data · MedCoder structured relationship · MedCoder explanation. How to read the labels · All data sources and release dates

Nearest Codes in This Family

Official ICD-10-CM classifications closest to M76.6 in its code family, with their registry titles.

• M76.42 — Tibial collateral bursitis [Pellegrini-Stieda], left leg
• M76.5 — Patellar tendinitis
• M76.50 — Patellar tendinitis, unspecified knee
• M76.51 — Patellar tendinitis, right knee
• M76.52 — Patellar tendinitis, left knee
• M76.60 — Achilles tendinitis, unspecified leg
• M76.61 — Achilles tendinitis, right leg
• M76.62 — Achilles tendinitis, left leg
• M76.7 — Peroneal tendinitis
• M76.70 — Peroneal tendinitis, unspecified leg

View all codes in the M76 family