ICD-10 · PDGM grouping
M11 Other crystal arthropathies
All 97 codes in the M11 family, with the PDGM clinical group, comorbidity subgroup and primary-position rule CMS assigns, read from the CMS grouper crosswalk v07.2.26 and the CDC FY2027 code file.
ICD-10-CM FY2027 · CMS grouper v07.2.26
Codes in family
97
Can lead a claim
63
Cannot lead a claim
34
What CMS assigns to M11
63 of the 97 codes group to Musculoskeletal Rehabilitation; 34 are assigned no clinical group. None of the 97 is assigned a comorbidity subgroup. 63 of the 97 can lead a claim.
Every code in M11
Descriptions are CDC’s FY2027 wording; where CMS’s grouper abbreviates one, its form is shown beneath.
| Code | Description | Primary position | Clinical group | Comorbidity subgroup |
|---|---|---|---|---|
| M11.0 Hydroxyapatite deposition disease | ||||
| M11.00 | Hydroxyapatite deposition disease, unspecified site | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M11.01 Hydroxyapatite deposition disease, shoulder | ||||
| M11.011 | Hydroxyapatite deposition disease, right shoulder | Can lead a claim | E | None |
| M11.012 | Hydroxyapatite deposition disease, left shoulder | Can lead a claim | E | None |
| M11.019 | Hydroxyapatite deposition disease, unspecified shoulder | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M11.02 Hydroxyapatite deposition disease, elbow | ||||
| M11.021 | Hydroxyapatite deposition disease, right elbow | Can lead a claim | E | None |
| M11.022 | Hydroxyapatite deposition disease, left elbow | Can lead a claim | E | None |
| M11.029 | Hydroxyapatite deposition disease, unspecified elbow | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M11.03 Hydroxyapatite deposition disease, wrist | ||||
| M11.031 | Hydroxyapatite deposition disease, right wrist | Can lead a claim | E | None |
| M11.032 | Hydroxyapatite deposition disease, left wrist | Can lead a claim | E | None |
| M11.039 | Hydroxyapatite deposition disease, unspecified wrist | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M11.04 Hydroxyapatite deposition disease, hand | ||||
| M11.041 | Hydroxyapatite deposition disease, right hand | Can lead a claim | E | None |
| M11.042 | Hydroxyapatite deposition disease, left hand | Can lead a claim | E | None |
| M11.049 | Hydroxyapatite deposition disease, unspecified hand | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M11.05 Hydroxyapatite deposition disease, hip | ||||
| M11.051 | Hydroxyapatite deposition disease, right hip | Can lead a claim | E | None |
| M11.052 | Hydroxyapatite deposition disease, left hip | Can lead a claim | E | None |
| M11.059 | Hydroxyapatite deposition disease, unspecified hip | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M11.06 Hydroxyapatite deposition disease, knee | ||||
| M11.061 | Hydroxyapatite deposition disease, right knee | Can lead a claim | E | None |
| M11.062 | Hydroxyapatite deposition disease, left knee | Can lead a claim | E | None |
| M11.069 | Hydroxyapatite deposition disease, unspecified knee | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M11.07 Hydroxyapatite deposition disease, ankle and foot | ||||
| M11.071 | Hydroxyapatite deposition disease, right ankle and foot | Can lead a claim | E | None |
| M11.072 | Hydroxyapatite deposition disease, left ankle and foot | Can lead a claim | E | None |
| M11.079 | Hydroxyapatite deposition disease, unspecified ankle and footCMS: Hydroxyapatite deposition disease, unsp ankle and foot | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M11.08 | Hydroxyapatite deposition disease, vertebrae | Can lead a claim | E | None |
| M11.09 | Hydroxyapatite deposition disease, multiple sites | Can lead a claim | E | None |
| M11.1 Familial chondrocalcinosis | ||||
| M11.10 | Familial chondrocalcinosis, unspecified site | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M11.11 Familial chondrocalcinosis, shoulder | ||||
| M11.111 | Familial chondrocalcinosis, right shoulder | Can lead a claim | E | None |
| M11.112 | Familial chondrocalcinosis, left shoulder | Can lead a claim | E | None |
| M11.119 | Familial chondrocalcinosis, unspecified shoulder | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M11.12 Familial chondrocalcinosis, elbow | ||||
| M11.121 | Familial chondrocalcinosis, right elbow | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M11.122 | Familial chondrocalcinosis, left elbow | Can lead a claim | E | None |
| M11.129 | Familial chondrocalcinosis, unspecified elbow | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M11.13 Familial chondrocalcinosis, wrist | ||||
| M11.131 | Familial chondrocalcinosis, right wrist | Can lead a claim | E | None |
| M11.132 | Familial chondrocalcinosis, left wrist | Can lead a claim | E | None |
| M11.139 | Familial chondrocalcinosis, unspecified wrist | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M11.14 Familial chondrocalcinosis, hand | ||||
| M11.141 | Familial chondrocalcinosis, right hand | Can lead a claim | E | None |
| M11.142 | Familial chondrocalcinosis, left hand | Can lead a claim | E | None |
| M11.149 | Familial chondrocalcinosis, unspecified hand | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M11.15 Familial chondrocalcinosis, hip | ||||
| M11.151 | Familial chondrocalcinosis, right hip | Can lead a claim | E | None |
| M11.152 | Familial chondrocalcinosis, left hip | Can lead a claim | E | None |
| M11.159 | Familial chondrocalcinosis, unspecified hip | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M11.16 Familial chondrocalcinosis, knee | ||||
| M11.161 | Familial chondrocalcinosis, right knee | Can lead a claim | E | None |
| M11.162 | Familial chondrocalcinosis, left knee | Can lead a claim | E | None |
| M11.169 | Familial chondrocalcinosis, unspecified knee | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M11.17 Familial chondrocalcinosis, ankle and foot | ||||
| M11.171 | Familial chondrocalcinosis, right ankle and foot | Can lead a claim | E | None |
| M11.172 | Familial chondrocalcinosis, left ankle and foot | Can lead a claim | E | None |
| M11.179 | Familial chondrocalcinosis, unspecified ankle and foot | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M11.18 | Familial chondrocalcinosis, vertebrae | Can lead a claim | E | None |
| M11.19 | Familial chondrocalcinosis, multiple sites | Can lead a claim | E | None |
| M11.2 Other chondrocalcinosis | ||||
| M11.20 | Other chondrocalcinosis, unspecified site | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M11.21 Other chondrocalcinosis, shoulder | ||||
| M11.211 | Other chondrocalcinosis, right shoulder | Can lead a claim | E | None |
| M11.212 | Other chondrocalcinosis, left shoulder | Can lead a claim | E | None |
| M11.219 | Other chondrocalcinosis, unspecified shoulder | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M11.22 Other chondrocalcinosis, elbow | ||||
| M11.221 | Other chondrocalcinosis, right elbow | Can lead a claim | E | None |
| M11.222 | Other chondrocalcinosis, left elbow | Can lead a claim | E | None |
| M11.229 | Other chondrocalcinosis, unspecified elbow | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M11.23 Other chondrocalcinosis, wrist | ||||
| M11.231 | Other chondrocalcinosis, right wrist | Can lead a claim | E | None |
| M11.232 | Other chondrocalcinosis, left wrist | Can lead a claim | E | None |
| M11.239 | Other chondrocalcinosis, unspecified wrist | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M11.24 Other chondrocalcinosis, hand | ||||
| M11.241 | Other chondrocalcinosis, right hand | Can lead a claim | E | None |
| M11.242 | Other chondrocalcinosis, left hand | Can lead a claim | E | None |
| M11.249 | Other chondrocalcinosis, unspecified hand | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M11.25 Other chondrocalcinosis, hip | ||||
| M11.251 | Other chondrocalcinosis, right hip | Can lead a claim | E | None |
| M11.252 | Other chondrocalcinosis, left hip | Can lead a claim | E | None |
| M11.259 | Other chondrocalcinosis, unspecified hip | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M11.26 Other chondrocalcinosis, knee | ||||
| M11.261 | Other chondrocalcinosis, right knee | Can lead a claim | E | None |
| M11.262 | Other chondrocalcinosis, left knee | Can lead a claim | E | None |
| M11.269 | Other chondrocalcinosis, unspecified knee | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M11.27 Other chondrocalcinosis, ankle and foot | ||||
| M11.271 | Other chondrocalcinosis, right ankle and foot | Can lead a claim | E | None |
| M11.272 | Other chondrocalcinosis, left ankle and foot | Can lead a claim | E | None |
| M11.279 | Other chondrocalcinosis, unspecified ankle and foot | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M11.28 | Other chondrocalcinosis, vertebrae | Can lead a claim | E | None |
| M11.29 | Other chondrocalcinosis, multiple sites | Can lead a claim | E | None |
| M11.8 Other specified crystal arthropathies | ||||
| M11.80 | Other specified crystal arthropathies, unspecified site | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M11.81 Other specified crystal arthropathies, shoulder | ||||
| M11.811 | Other specified crystal arthropathies, right shoulder | Can lead a claim | E | None |
| M11.812 | Other specified crystal arthropathies, left shoulder | Can lead a claim | E | None |
| M11.819 | Other specified crystal arthropathies, unspecified shoulder | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M11.82 Other specified crystal arthropathies, elbow | ||||
| M11.821 | Other specified crystal arthropathies, right elbow | Can lead a claim | E | None |
| M11.822 | Other specified crystal arthropathies, left elbow | Can lead a claim | E | None |
| M11.829 | Other specified crystal arthropathies, unspecified elbow | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M11.83 Other specified crystal arthropathies, wrist | ||||
| M11.831 | Other specified crystal arthropathies, right wrist | Can lead a claim | E | None |
| M11.832 | Other specified crystal arthropathies, left wrist | Can lead a claim | E | None |
| M11.839 | Other specified crystal arthropathies, unspecified wrist | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M11.84 Other specified crystal arthropathies, hand | ||||
| M11.841 | Other specified crystal arthropathies, right hand | Can lead a claim | E | None |
| M11.842 | Other specified crystal arthropathies, left hand | Can lead a claim | E | None |
| M11.849 | Other specified crystal arthropathies, unspecified hand | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M11.85 Other specified crystal arthropathies, hip | ||||
| M11.851 | Other specified crystal arthropathies, right hip | Can lead a claim | E | None |
| M11.852 | Other specified crystal arthropathies, left hip | Can lead a claim | E | None |
| M11.859 | Other specified crystal arthropathies, unspecified hip | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M11.86 Other specified crystal arthropathies, knee | ||||
| M11.861 | Other specified crystal arthropathies, right knee | Can lead a claim | E | None |
| M11.862 | Other specified crystal arthropathies, left knee | Can lead a claim | E | None |
| M11.869 | Other specified crystal arthropathies, unspecified knee | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M11.87 Other specified crystal arthropathies, ankle and foot | ||||
| M11.871 | Other specified crystal arthropathies, right ankle and foot | Can lead a claim | E | None |
| M11.872 | Other specified crystal arthropathies, left ankle and foot | Can lead a claim | E | None |
| M11.879 | Other specified crystal arthropathies, unspecified ankle and footCMS: Oth crystal arthropathies, unspecified ankle and foot | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M11.88 | Other specified crystal arthropathies, vertebrae | Can lead a claim | E | None |
| M11.89 | Other specified crystal arthropathies, multiple sites | Can lead a claim | E | None |
| M11.9 | Crystal arthropathy, unspecified | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
Sources: CMS HH PPS Grouper Software v07.2.26, effective 2026-10-01, for the clinical group, comorbidity subgroup, code-first conventions and primary-position flags; CDC NCHS ICD-10-CM FY2027 code descriptions for the family title and code wording. This is the crosswalk Medicare runs a claim through. Grouping also depends on admission source, timing, the OASIS functional items and the rest of the diagnosis list.
The monthly home health regs digest
What CMS changed, what's due next, and what to do about it — one email a month, no fluff. Read the first issue