Alphabetic Index FY2027

M65.0

Abscess of tendon sheath

FY2027Chapter 13: Diseases of the musculoskeletal system and connective tissue/M65–M67 Disorders of synovium and tendon

Non-billable headerNot valid on its own. Use one of the more specific codes under it.

M65.0 is a non-billable ICD-10-CM code header for abscess of tendon sheath. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are M65.00 Abscess of tendon sheath, unspecified site; M65.01 Abscess of tendon sheath, shoulder; M65.02 Abscess of tendon sheath, upper arm; M65.03 Abscess of tendon sheath, forearm and 5 more. Its coding notes include a Use additional code instruction, 3 Excludes1 entries and 10 Excludes2 entries.

Use additional code

Add the listed code as a secondary code, if known.

This code
  • code (B95-B96) to identify bacterial agent.

Excludes1

Not coded here. The listed conditions generally should not be reported together.

Inherited from M65 Synovitis and tenosynovitis
  • chronic crepitant synovitis of hand and wrist (M70.0-)
  • current injury - see injury of ligament or tendon by body region
  • soft tissue disorders related to use, overuse and pressure (M70.-)

Excludes2

Not included here. Both codes may be reported if the patient has both conditions.

Also from chapter/block level (10 notes)
Inherited from Chapter 13 Diseases of the musculoskeletal system and connective tissue
  • arthropathic psoriasis (L40.5-)
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • compartment syndrome (traumatic) (T79.A-)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Notes

Also from chapter/block level (1 note)
Inherited from Chapter 13 Diseases of the musculoskeletal system and connective tissue
  • Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition

More specific codes under M65.0 9