M13.81 – Other specified arthritis, shoulder

ICD-10-CM 2027 diagnosis code · Inflammatory polyarthropathies

Non-billable header

ICD-10-CM code M13.81
Code
M13.81 (claims format: M1381)
Description
Other specified arthritis, shoulder
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
M13 › M13.8

Billable codes under M13.81

M13.81 is a header code and cannot be used on claims. Choose the most specific code:

Notes inherited from parent codes

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

M13 – Other arthritis

Excludes1 (not coded here):

M13.8 – Other specified arthritis

Applicable to:
  • Allergic arthritis
Excludes1 (not coded here):

Index terms for M13.81

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

Related codes in M13.8

Frequently asked questions

What is ICD-10 code M13.81?

M13.81 is the ICD-10-CM code for other specified arthritis, shoulder, in the block M05-M14 (Inflammatory polyarthropathies).

Is M13.81 a billable code?

No. M13.81 is a header code with more specific child codes; report one of the billable codes listed above.

What category does M13.81 belong to?

It belongs to category M13 – Other arthritis.

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.