M19.91Billable
Primary osteoarthritis, unspecified site
- Chapter
- 13. Diseases of the musculoskeletal system and connective tissue
- Category
- M19
- Effective date
- October 1, 2026
Related codes in category M19
M19Other and unspecified osteoarthritisM19.0Primary osteoarthritis of other jointsM19.01Primary osteoarthritis, shoulderM19.011Primary osteoarthritis, right shoulderYesM19.012Primary osteoarthritis, left shoulderYesM19.019Primary osteoarthritis, unspecified shoulderYesM19.02Primary osteoarthritis, elbowM19.021Primary osteoarthritis, right elbowYesM19.022Primary osteoarthritis, left elbowYesM19.029Primary osteoarthritis, unspecified elbowYesM19.03Primary osteoarthritis, wristM19.031Primary osteoarthritis, right wristYes
Frequently asked questions
What is ICD-10 code M19.91?
M19.91 is an ICD-10-CM diagnosis code for Primary osteoarthritis, unspecified site.
Is M19.91 a billable code?
Yes. M19.91 is billable and specific enough to be used on a claim.
What ICD-10-CM chapter is M19.91 in?
M19.91 falls under Chapter 13: Diseases of the musculoskeletal system and connective tissue.
When did M19.91 become effective?
M19.91 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to M19.91?
M19.91 belongs to category M19, which includes 12 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.