M19.012 ICD-10-CM Code: Primary osteoarthritis, left shoulder
M19.012 is not a CMS-HCC payment code. MEAT criteria · RAF Calculator · HCC coding software
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FY 2026 Apr update / Diseases of the musculoskeletal system and connective tissue (M00-M99) / Osteoarthritis (M15-M19)
M19.012
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidancePrimary osteoarthritis, left shoulder
Wear and tear arthritis of the left shoulder joint, occurring without a prior injury or underlying condition.
CMS-HCC V28
N/A—
Not mapped
CMS-HCC V24
HistoricalHistorical
Not used for CY2026 payment
ACA/HHS
N/A—
Not mapped
ESRD/PACE
N/A—
Not mapped
RXHCC
N/A—
Not mapped
Code Book Path
Inclusion Terms
OfficialNo inclusion terms are included in this display for M19.012. Check the code and parent instructions in the Code Book.
Excludes 2
Official- arthropathic psoriasis (L40.5-)Inherited from M00-M99, M15-M19, M19
- certain conditions originating in the perinatal period (P04-P96)Inherited from M00-M99, M15-M19, M19
- certain infectious and parasitic diseases (A00-B99)Inherited from M00-M99, M15-M19, M19
- compartment syndrome (traumatic) (T79.A-)Inherited from M00-M99, M15-M19, M19
- complications of pregnancy, childbirth and the puerperium (O00-O9A)Inherited from M00-M99, M15-M19, M19
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)Inherited from M00-M99, M15-M19, M19
- endocrine, nutritional and metabolic diseases (E00-E88)Inherited from M00-M99, M15-M19, M19
- injury, poisoning and certain other consequences of external causes (S00-T88)Inherited from M00-M99, M15-M19, M19
- neoplasms (C00-D49)Inherited from M00-M99, M15-M19, M19
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)Inherited from M00-M99, M15-M19, M19
- osteoarthritis of spine (M47.-)Inherited from M00-M99, M15-M19, M19
- arthrosis of spine (M47.-)Inherited from M00-M99, M15-M19, M19
- hallux rigidus (M20.2)Inherited from M00-M99, M15-M19, M19
Related Codes
Includes
OfficialNo Includes notes are included in this display for M19.012. Check the code and parent instructions in the Code Book.
Excludes 1
Official- polyarthritis (M15.-)Inherited from M19
Code First
OfficialNo Code First sequencing instructions are included in this display for M19.012. Check the code and parent instructions in the Code Book.
Use Additional
OfficialNo Use Additional Code instructions are included in this display for M19.012. Check the code and parent instructions in the Code Book.
Code Also
OfficialNo Code Also instructions are included in this display for M19.012. Check the code and parent instructions in the Code Book.
Buddy Documentation Tip
Current with CMS: FY2026 ICD-10-CM Apr 1 update (effective Apr 1 – Sep 30, 2026) · CMS-HCC V28, 100% phased in for payment year 2026. FY2027 code set already staged for October 1, 2026. How HCC Buddy stays current →
Is M19.012 an HCC code?
No. M19.012 is a billable ICD-10-CM code with no mapping under the current CMS-HCC V28 community payment model, and none under the ESRD, Part D RxHCC, or HHS-HCC models.
- Code
- M19.012
- Description
- Primary osteoarthritis, left shoulder
- HCC (V28)
- No CMS-HCC V28 mapping
- RAF reference coefficient
- —
- Billable
- Yes
- Payment year
- 2026
Coder workflow notes
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What This Code Means
M19.012 is the ICD-10-CM diagnosis code for primary osteoarthritis, left shoulder. Wear and tear arthritis of the left shoulder joint, occurring without a prior injury or underlying condition. M19.012 sits in the ICD-10-CM chapter for diseases of the musculoskeletal system and connective tissue (m00-m99), within the section covering osteoarthritis (m15-m19).
M19.012 is a billable ICD-10-CM code, but no current CMS-HCC V28 community payment mapping is shown, and none under the ESRD, Part D RxHCC, or HHS-HCC models. Do not assign risk adjustment value from this page when no source-backed mapping is shown; verify the applicable model and payment year.
Confirm left shoulder is specifically documented; do not assume laterality.
HCC Buddy maintains structured V28 and V24 mapping, source-labeled coefficient references, and MEAT documentation criteria for M19.012 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Confirm left shoulder is specifically documented; do not assume laterality
- •This code is for primary OA only; secondary causes require different coding