M11.212 ICD-10-CM Code: Other chondrocalcinosis, left shoulder

Coder workflow for M11.212

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

Before you code M11.212

1. “Other” (NEC) means the condition is specified in the record but no dedicated code captures it. Confirm the documented form is not one a sibling code names before settling on M11.212; if the record states no specifics at all, the unspecified sibling applies instead. “Other” codes are for documented conditions the classification gives no specific code; “unspecified” codes are for records lacking the detail (Guidelines I.A.9.a, I.A.9.b).

   See the relationships section · Guide: Other vs unspecified (NEC vs NOS) →

2. Laterality is coded in this family. Confirm the side documented — right, left, or bilateral — and select the matching code (this page’s code: left). The unspecified-side code applies only when the record states no side. Laterality is assigned from the documented side; where a bilateral code exists and both sides are documented, it is used instead of two unilateral codes (Guidelines I.B.13).

   ReviewM11.211 · right, M11.219 · unspecified

   Guide: Laterality coding →

Choose the right path

1. Is the side documented?
   Yes → Select the code for the documented side (or the bilateral code when both sides are documented and one exists).
   No → Use the unspecified-side code only when the record states no side; a query is the alternative.

   ReviewM11.211 · right, M11.219 · unspecified

Consider M11.212. 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).

Laterality

Right, left or bilateral as documented; unspecified only when the record states no side (Guidelines I.B.13).

Any detail beyond this code’s title

What the record states that a more specific sibling code would capture — or its absence, which itself supports the unspecified code.

Coding decision scenarios

Pattern scenarios for this code’s structure — decision rules, not clinical cases

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 M11.212 with…

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

The codes most likely to be picked instead of M11.212 — 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.

• M11.219— 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 “Other chondrocalcinosis, unspecified shoulder” takes M11.219; specificity in the record moves it back here.

  Full comparison: M11.212 vs M11.219 →

• M11.211— Laterality relationship (Review)

  Same condition; these differ only in which side is documented.

  The same condition on the other side; the documented side decides, and a bilateral code, where one exists, replaces the pair when both sides are documented.

  What moves you there: A documented right side moves the case to M11.211.

  Full comparison: M11.212 vs M11.211 →

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

• No Medicare Code Editor or MS-DRG Definitions Manual restrictions apply to this code.

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 M11.212 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 1 Excludes1 note: E83.5 — Disorders of calcium metabolism (via M11.-).

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: M24.1 — Other articular cartilage disorders (via M11.2.-).

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

MS-DRG Grouper Relationships (FY2027)

Potential MS-DRG participation — not a DRG assignment.

FY2027 MS-DRG: not on the CMS CC/MCC list — as a secondary diagnosis this code does not change MS-DRG severity for that release.

Named in the grouper logic of 2 MS-DRGs: DRG 553 (MDC 08), DRG 554 (MDC 08).

From the CMS MS-DRG Definitions Manual (Appendices B and C). Actual DRG assignment depends on the complete claim.

Clinical classification (AHRQ CCSR):MUS034 — Crystal arthropathies (excluding gout) (default).

Clinical Classifications Software Refined (CCSR) for ICD-10-CM Diagnoses. Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality.

Related Codes

Same condition, opposite side

Same category and title, differing only in which side of the body is affected.

M11.211 — Other chondrocalcinosis, right shoulder (right)Compare M11.212 vs M11.211 →, M11.219 — Other chondrocalcinosis, unspecified shoulder (unspecified)Compare M11.212 vs M11.219 →

Same clinical category (CCSR)

AHRQ's Clinical Classifications Software groups these diagnoses under the same clinical category (Crystal arthropathies (excluding gout)).

M11.161 — Familial chondrocalcinosis, right knee, M11.162 — Familial chondrocalcinosis, left knee, M11.169 — Familial chondrocalcinosis, unspecified knee, M11.171 — Familial chondrocalcinosis, right ankle and foot, M11.172 — Familial chondrocalcinosis, left ankle and foot, M11.179 — Familial chondrocalcinosis, unspecified ankle and foot, M11.18 — Familial chondrocalcinosis, vertebrae, M11.19 — Familial chondrocalcinosis, multiple sites, M11.20 — Other chondrocalcinosis, unspecified site, M11.211 — Other chondrocalcinosis, right shoulder, M11.219 — Other chondrocalcinosis, unspecified shoulder, M11.221 — Other chondrocalcinosis, right elbow, M11.222 — Other chondrocalcinosis, left elbow, M11.229 — Other chondrocalcinosis, unspecified elbow, M11.231 — Other chondrocalcinosis, right wrist, M11.232 — Other chondrocalcinosis, left wrist, M11.239 — Other chondrocalcinosis, unspecified wrist, M11.241 — Other chondrocalcinosis, right hand, M11.242 — Other chondrocalcinosis, left hand, M11.249 — Other chondrocalcinosis, unspecified hand, +76 more

Contextual Map

Every relationship of M11.212 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 M11.212 with these 2 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
• M05-M14 — Inflammatory polyarthropathies[Hierarchy]— CMS ICD-10-CM tabular structure · icd10cm-fy2026

Referenced by Excludes1 notes

• E83.5 — Disorders of calcium metabolism[Excludes1](via M11.-): “chondrocalcinosis (M11.1-M11.2)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026

Referenced by Excludes2 notes

• M24.1 — Other articular cartilage disorders[Excludes2](via M11.2.-): “chondrocalcinosis (M11.1-, M11.2-)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026

Clinical classification (CCSR)

• MUS034 — Crystal arthropathies (excluding gout)[CCSR]— AHRQ CCSR for ICD-10-CM Diagnoses (HCUP)

MS-DRG Grouper

• DRG 553 — BONE DISEASES AND ARTHROPATHIES WITH MCC[MS-DRG]: “BONE DISEASES AND ARTHROPATHIES WITH MCC (MDC 08)”— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
• DRG 554 — BONE DISEASES AND ARTHROPATHIES WITHOUT MCC[MS-DRG]: “BONE DISEASES AND ARTHROPATHIES WITHOUT MCC (MDC 08)”— CMS MS-DRG Definitions Manual (Appendix B) · FY2027

MDC crossing

• MDC 08 — Diseases and Disorders of the Musculoskeletal System and Connective Tissue[MDC crossing]: “Diseases and Disorders of the Musculoskeletal System and Connective Tissue — the grouper's crossing between diagnoses and procedures: a principal diagnosis sets the MDC, and same-MDC procedures move the stay to its surgical DRGs. 18,439 same-MDC procedures group here; browse them on the MDC page.”— CMS MS-DRG Definitions Manual · FY2027

Nearest codes (40)

• M11 — Other crystal arthropathies[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• M11.142 — Familial chondrocalcinosis, left hand[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• M11.149 — Familial chondrocalcinosis, unspecified hand[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• M11.15 — Familial chondrocalcinosis, hip[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• M11.151 — Familial chondrocalcinosis, right hip[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• M11.152 — Familial chondrocalcinosis, left hip[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• M11.159 — Familial chondrocalcinosis, unspecified hip[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• M11.16 — Familial chondrocalcinosis, knee[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

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 FY2027 tabular list, index and tables, effective October 1, 2026 Release, file and checksum · Publisher’s page

Claim edits Official source data

CMS Definitions of Medicare Code Edits — v44.0 (October 2026) Release, file and checksum · Publisher’s page

Inpatient payment groups Official source data

CMS MS-DRG Definitions Manual (incl. Appendix B diagnosis index, Appendix C CC/MCC list, Appendix E procedure index) and IPPS Final Rule tables — v44 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 M11.212 in its code family, with their registry titles.

• M11.19 — Familial chondrocalcinosis, multiple sites
• M11.2 — Other chondrocalcinosis
• M11.20 — Other chondrocalcinosis, unspecified site
• M11.21 — Other chondrocalcinosis, shoulder
• M11.211 — Other chondrocalcinosis, right shoulder
• M11.219 — Other chondrocalcinosis, unspecified shoulder
• M11.22 — Other chondrocalcinosis, elbow
• M11.221 — Other chondrocalcinosis, right elbow
• M11.222 — Other chondrocalcinosis, left elbow
• M11.229 — Other chondrocalcinosis, unspecified elbow

View all codes in the M11 family