M02.36 – Reiter's disease, knee

ICD-10-CM 2027 diagnosis code · Infectious arthropathies

Non-billable header

ICD-10-CM code M02.36

Code: M02.36 (claims format: M0236)
Description: Reiter's disease, 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: M00-M02 Infectious arthropathies
Parent codes: M02 › M02.3

Billable codes under M02.36

M02.36 is a header code and cannot be used on claims. Choose the most specific code:

M02.361 – Reiter's disease, right kneeBillable
M02.362 – Reiter's disease, left kneeBillable
M02.369 – Reiter's disease, unspecified kneeBillable

Notes inherited from parent codes

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

M02 – Postinfective and reactive arthropathies

Excludes1 (not coded here):

Behçet's disease (M35.2)
direct infections of joint in infectious and parasitic diseases classified elsewhere (M01.-)
postmeningococcal arthritis (A39.84)
mumps arthritis (B26.85)
rubella arthritis (B06.82)
syphilis arthritis (late) (A52.77)
rheumatic fever (I00)
tabetic arthropathy [Charcôt's] (A52.16)

Code first:

underlying disease, such as:
congenital syphilis [Clutton's joints] (A50.5)
enteritis due to Yersinia enterocolitica (A04.6)
infective endocarditis (I33.0)
viral hepatitis (B15-B19)

M02.3 – Reiter's disease

Applicable to:

Reactive arthritis

Block M00-M02

Notes:

This block comprises arthropathies due to microbiological agents. Distinction is made between the following types of etiological relationship:
a) direct infection of joint, where organisms invade synovial tissue and microbial antigen is present in the joint;
b) indirect infection, which may be of two types: a reactive arthropathy, where microbial infection of the body is established but neither organisms nor antigens can be identified in the joint, and a postinfective arthropathy, where microbial antigen is present but recovery of an organism is inconstant and evidence of local multiplication is lacking.

Index terms for M02.36

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

Reiter's disease, syndrome, or urethritis, knee

Related codes in M02.3

M02.30 – Reiter's disease, unspecified siteBillable
M02.31 – Reiter's disease, shoulderHeader
M02.32 – Reiter's disease, elbowHeader
M02.33 – Reiter's disease, wristHeader
M02.34 – Reiter's disease, handHeader
M02.35 – Reiter's disease, hipHeader
M02.37 – Reiter's disease, ankle and footHeader
M02.38 – Reiter's disease, vertebraeBillable
M02.39 – Reiter's disease, multiple sitesBillable

Frequently asked questions

What is ICD-10 code M02.36?

M02.36 is the ICD-10-CM code for reiter's disease, knee, in the block M00-M02 (Infectious arthropathies).

Is M02.36 a billable code?

No. M02.36 is a header code with more specific child codes; report one of the billable codes listed above.

What category does M02.36 belong to?

It belongs to category M02 – Postinfective and reactive 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.