M65.04 – Abscess of tendon sheath, hand

ICD-10-CM 2027 diagnosis code · Disorders of synovium and tendon

Non-billable header

ICD-10-CM code M65.04

Code: M65.04 (claims format: M6504)
Description: Abscess of tendon sheath, hand
Billable: No – use a more specific code below
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 13. Diseases of the musculoskeletal system and connective tissue (M00-M99)
Block: M65-M67 Disorders of synovium and tendon
Parent codes: M65 › M65.0

Billable codes under M65.04

M65.04 is a header code and cannot be used on claims. Choose the most specific code:

M65.041 – Abscess of tendon sheath, right handBillable
M65.042 – Abscess of tendon sheath, left handBillable
M65.049 – Abscess of tendon sheath, unspecified handBillable

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

M65 – Synovitis and tenosynovitis

Excludes1 (not coded here):

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.-)

M65.0 – Abscess of tendon sheath

Use additional code:

code (B95-B96) to identify bacterial agent.

Index terms for M65.04

Entries in the ICD-10-CM alphabetic index that lead to this code:

Abscess, tendon, hand

Related codes in M65.0

Frequently asked questions

What is ICD-10 code M65.04?

M65.04 is the ICD-10-CM code for abscess of tendon sheath, hand, in the block M65-M67 (Disorders of synovium and tendon).

Is M65.04 a billable code?

No. M65.04 is a header code with more specific child codes; report one of the billable codes listed above.

What category does M65.04 belong to?

It belongs to category M65 – Synovitis and tenosynovitis.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.