M25.77 – Osteophyte, ankle and foot

ICD-10-CM 2027 diagnosis code · Other joint disorders

Non-billable header

ICD-10-CM code M25.77

Code: M25.77 (claims format: M2577)
Description: Osteophyte, ankle and foot
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: M20-M25 Other joint disorders
Parent codes: M25 › M25.7

Billable codes under M25.77

M25.77 is a header code and cannot be used on claims. Choose the most specific code:

M25.771 – Osteophyte, right ankleBillable
M25.772 – Osteophyte, left ankleBillable
M25.773 – Osteophyte, unspecified ankleBillable
M25.774 – Osteophyte, right footBillable
M25.775 – Osteophyte, left footBillable
M25.776 – Osteophyte, unspecified footBillable

Notes inherited from parent codes

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

M25 – Other joint disorder, not elsewhere classified

Excludes2 (not included here):

abnormality of gait and mobility (R26.-)
acquired deformities of limb (M20-M21)
calcification of bursa (M71.4-)
calcification of shoulder (joint) (M75.3)
calcification of tendon (M65.2-)
difficulty in walking (R26.2)
temporomandibular joint disorder (M26.6-)

Block M20-M25

Excludes2 (not included here):

joints of the spine (M40-M54)

Index terms for M25.77

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

Related codes in M25.7

M25.70 – Osteophyte, unspecified jointBillable
M25.71 – Osteophyte, shoulderHeader
M25.72 – Osteophyte, elbowHeader
M25.73 – Osteophyte, wristHeader
M25.74 – Osteophyte, handHeader
M25.75 – Osteophyte, hipHeader
M25.76 – Osteophyte, kneeHeader
M25.78 – Osteophyte, vertebraeBillable

Frequently asked questions

What is ICD-10 code M25.77?

M25.77 is the ICD-10-CM code for osteophyte, ankle and foot, in the block M20-M25 (Other joint disorders).

Is M25.77 a billable code?

No. M25.77 is a header code with more specific child codes; report one of the billable codes listed above.

What category does M25.77 belong to?

It belongs to category M25 – Other joint disorder, not elsewhere classified.

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.