---
title: "ICD-10-CM M19.012: Primary osteoarthritis, left shoulder | BillingBrief"
description: "ICD-10-CM code M19.012: Primary osteoarthritis, left shoulder. Category, related codes, and the official source, in plain English."
canonical: "https://billingbrief.com/icd10/m19.012/"
language: "en"
---

# M19.012 Primary osteoarthritis, left shoulder

ICD-10-CM · [CMS code reference](#source)

**Official ICD-10-CM description:** Primary osteoarthritis, left shoulder

## Coding notes

From the ICD-10-CM FY2027 (effective October 1, 2026) tabular list. Notes on a parent code or category apply here too.

### Excludes1

Not coded together with this code. The exception is when the two conditions are unrelated to each other.

-   polyarthritis (M15.-)

### Excludes2

Not part of this code, but both can be coded when both are documented.

-   arthrosis of spine (M47.-)
-   hallux rigidus (M20.2)
-   osteoarthritis of spine (M47.-)

## Related codes

-   [`M19.011` Primary osteoarthritis, right shoulder ICD-10-CM](https://billingbrief.com/icd10/m19.011/)
-   [`M19.019` Primary osteoarthritis, unspecified shoulder ICD-10-CM](https://billingbrief.com/icd10/m19.019/)
-   [`M19.021` Primary osteoarthritis, right elbow ICD-10-CM](https://billingbrief.com/icd10/m19.021/)
-   [`M19.022` Primary osteoarthritis, left elbow ICD-10-CM](https://billingbrief.com/icd10/m19.022/)
-   [`M19.029` Primary osteoarthritis, unspecified elbow ICD-10-CM](https://billingbrief.com/icd10/m19.029/)
-   [`M19.031` Primary osteoarthritis, right wrist ICD-10-CM](https://billingbrief.com/icd10/m19.031/)
-   [`M19.032` Primary osteoarthritis, left wrist ICD-10-CM](https://billingbrief.com/icd10/m19.032/)
-   [`M19.039` Primary osteoarthritis, unspecified wrist ICD-10-CM](https://billingbrief.com/icd10/m19.039/)

## Common questions

### Is M19.012 a billable code?

Yes. M19.012 is a billable ICD-10-CM code in the ICD-10-CM FY2027 (effective October 1, 2026) code set.

## From the source

Official description from [CMS](https://www.cms.gov/medicare/coding-billing/icd-10-codes).
ICD-10-CM FY2027 (effective October 1, 2026).

Code set

ICD-10-CM

Category

M19 Other and unspecified osteoarthritis

Chapter

Diseases of the musculoskeletal system and connective tissue

Billable

Yes

Educational reference only. Not medical, legal, or billing advice. Always check the current official code set and payer policy before you bill. [About BillingBrief and our sources](https://billingbrief.com/about/).