M07.66 – Enteropathic arthropathies, knee

ICD-10-CM 2027 diagnosis code · Inflammatory polyarthropathies

Non-billable header

ICD-10-CM code M07.66

Code: M07.66 (claims format: M0766)
Description: Enteropathic arthropathies, knee
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: M05-M14 Inflammatory polyarthropathies
Parent codes: M07 › M07.6

Billable codes under M07.66

M07.66 is a header code and cannot be used on claims. Choose the most specific code:

M07.661 – Enteropathic arthropathies, right kneeBillable
M07.662 – Enteropathic arthropathies, left kneeBillable
M07.669 – Enteropathic arthropathies, unspecified kneeBillable

Notes inherited from parent codes

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

M07 – Enteropathic arthropathies

Excludes1 (not coded here):

psoriatic arthropathies (L40.5-)

Code also:

associated enteropathy, such as:
regional enteritis [Crohn's disease] (K50.-)
ulcerative colitis (K51.-)

Index terms for M07.66

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

Arthropathy, enteropathic, knee

Related codes in M07.6

Frequently asked questions

What is ICD-10 code M07.66?

M07.66 is the ICD-10-CM code for enteropathic arthropathies, knee, in the block M05-M14 (Inflammatory polyarthropathies).

Is M07.66 a billable code?

No. M07.66 is a header code with more specific child codes; report one of the billable codes listed above.

What category does M07.66 belong to?

It belongs to category M07 – Enteropathic arthropathies.

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.