ICD-10-CM diagnosis code
M65.812 Other synovitis and tenosynovitis, left shoulder
- Billable
- Yes, a complete code (FY2026)
- Category
- M65 Synovitis and tenosynovitis
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Other codes in M65
133 complete codes in this category.
- M65.351Trigger finger, right little finger
- M65.352Trigger finger, left little finger
- M65.359Trigger finger, unspecified little finger
- M65.4Radial styloid tenosynovitis [de Quervain]
- M65.80Other synovitis and tenosynovitis, unspecified site
- M65.811Other synovitis and tenosynovitis, right shoulder
- M65.812Other synovitis and tenosynovitis, left shoulder
- M65.819Other synovitis and tenosynovitis, unspecified shoulder
- M65.821Other synovitis and tenosynovitis, right upper arm
- M65.822Other synovitis and tenosynovitis, left upper arm
- M65.829Other synovitis and tenosynovitis, unspecified upper arm
- M65.831Other synovitis and tenosynovitis, right forearm
Documentation tips
- Make sure the note supports every element of the title, “Other synovitis and tenosynovitis, left shoulder”: each detail in it should be traceable to the history, examination or assessment.
- Code to the highest specificity the documentation supports. If a detail is missing from the note, add it to the note rather than choosing a less specific code by default.
- Check the Tabular List and official guidelines for instructional notes (“code first”, “use additional code”, Excludes1/Excludes2) that apply to M65.
The international WHO ICD-10 also has M65, with its inclusion and exclusion notes; titles and detail can differ from ICD-10-CM.
ICD-10-CM is developed by the National Center for Health Statistics (NCHS), Centers for Disease Control and Prevention, U.S. Department of Health and Human Services, and is based on the WHO ICD-10. Codes and titles are reproduced unchanged from the FY2026 code list (effective 1 October 2025). Their use here does not imply endorsement by CDC, HHS or the U.S. Government. Changes effective on or after 1 October 2026 may not be reflected yet; check the current release at cdc.gov or cms.gov before submitting claims.
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