M22.0 ICD-10-CM Code: Recurrent dislocation of patella

Coding instructions

Official Tabular Instructional Notes: the inclusion, exclusion and sequencing notes published for M22.0 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 M22.0 itself; “inherited from” names the category or block whose note applies here.

Coder workflow for M22.0

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

Before you code M22.0

1. M22.0 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).

   ReviewM22.00, M22.01, M22.02

   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 M22.0?
   Yes → Select that code and continue the checks below on its own page.
   No → M22.0 cannot be reported as written; query for the specificity its subcategory needs.

   ReviewM22.00, M22.01, M22.02

Consider M22.0. 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 M22.0(2 notes)

  Coding workflow: The conditions named in this note are not included in M22.0. When the record documents both, both may be reported; the note is a boundary, not a prohibition.

  CompareS83.0

  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 M22.0 with…

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

The codes most likely to be picked instead of M22.0 — 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.

• M22.9— Specificity relationship (Review)

  Overlapping diagnoses in the same category.

  Overlapping codes in the same category — the documentation decides which is the more specific fit.

  What moves you there: A record that documents no more than “Unspecified disorder of patella” takes M22.9; specificity in the record moves it back here.

  Full comparison: M22.0 vs M22.9 →

• S83.0— 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 traumatic dislocation of patella adds S83.0; it is not part of this code and both may be reported when both are documented.

  Full comparison: M22.0 vs S83.0 →

• M40— 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 joints of the spine adds M40; it is not part of this code and both may be reported when both are documented.

  Full comparison: M22.0 vs M40 →

• M54— 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 joints of the spine adds M54; it is not part of this code and both may be reported when both are documented.

  Full comparison: M22.0 vs M54 →

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: M22.00, M22.01, M22.02.

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 M22.0 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 4 Excludes2 notes across 2 chapters: M23 — Internal derangement of knee, M24.4 — Recurrent dislocation of joint, S83 — Dislocation and sprain of joints and ligaments of knee (via M22.-), S83 — Dislocation and sprain of joints and ligaments of knee.

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 “Dislocation”; these codes share that main term but sit in a different category of the Tabular List.

H04.16 — Lacrimal gland dislocation (lacrimal gland), H27.10 — Unspecified dislocation of lens (lens), H27.11 — Subluxation of lens (lens, partial), H27.12 — Anterior dislocation of lens (lens, anterior), H27.13 — Posterior dislocation of lens (lens, posterior), J34.2 — Deviated nasal septum (septum), M23.8X — Other internal derangements of knee (knee, old), M24.30 — Pathological dislocation of unspecified joint, not elsewhere classified (pathological NEC), M24.31 — Pathological dislocation of shoulder, not elsewhere classified (pathological NEC, shoulder), M24.32 — Pathological dislocation of elbow, not elsewhere classified (pathological NEC, elbow), M24.33 — Pathological dislocation of wrist, not elsewhere classified (pathological NEC, wrist), M24.34 — Pathological dislocation of hand, not elsewhere classified (pathological NEC, hand joint), M24.35 — Pathological dislocation of hip, not elsewhere classified (pathological NEC, hip), M24.36 — Pathological dislocation of knee, not elsewhere classified (pathological NEC, knee), M24.37 — Pathological dislocation of ankle and foot, not elsewhere classified (pathological NEC, ankle), M24.39 — Pathological dislocation of other specified joint, not elsewhere classified (pathological NEC, specified site NEC), M24.40 — Recurrent dislocation, unspecified joint (recurrent), M24.41 — Recurrent dislocation, shoulder (recurrent, shoulder), M24.42 — Recurrent dislocation, elbow (recurrent, elbow), M24.43 — Recurrent dislocation, wrist (recurrent, wrist), +130 more

Contextual Map

Every relationship of M22.0 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 M22.0 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
• M00-M25 — Arthropathies[Hierarchy]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• M20-M25 — Other joint disorders[Hierarchy]— CMS ICD-10-CM tabular structure · icd10cm-fy2026

Referenced by Excludes2 notes

• M23 — Internal derangement of knee[Excludes2]: “recurrent dislocation or subluxation of patella (M22.0-M22.1)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• M24.4 — Recurrent dislocation of joint[Excludes2]: “recurrent dislocation of patella (M22.0-M22.1)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• S83 — Dislocation and sprain of joints and ligaments of knee[Excludes2](via M22.-): “derangement of patella (M22.0-M22.3)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• S83 — Dislocation and sprain of joints and ligaments of knee[Excludes2]: “recurrent dislocation of knee (M22.0)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026

Nearest codes (31)

• M22 — Disorder of patella[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• M22.00 — Recurrent dislocation of patella, unspecified knee[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• M22.01 — Recurrent dislocation of patella, right knee[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• M22.02 — Recurrent dislocation of patella, left knee[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• M22.1 — Recurrent subluxation of patella[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• M22.10 — Recurrent subluxation of patella, unspecified knee[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• M22.11 — Recurrent subluxation of patella, right knee[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• M22.12 — Recurrent subluxation of patella, left knee[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• and 23 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 M22.0 in its code family, with their registry titles.

• M22 — Disorder of patella
• M22.00 — Recurrent dislocation of patella, unspecified knee
• M22.01 — Recurrent dislocation of patella, right knee
• M22.02 — Recurrent dislocation of patella, left knee
• M22.1 — Recurrent subluxation of patella
• M22.10 — Recurrent subluxation of patella, unspecified knee
• M22.11 — Recurrent subluxation of patella, right knee
• M22.12 — Recurrent subluxation of patella, left knee
• M22.2 — Patellofemoral disorders
• M22.2X — Patellofemoral disorders

View all codes in the M22 family