2027 ICD-10-CM Diagnosis Code M13Other arthritis

ICD-10-CM Codes›M00–M99›M05-M14›M13

ICD-10-CM M13
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

M13 is a non-billable ICD-10-CM category code for other arthritis, so it cannot be submitted on claims. Use a more specific code from this category instead, such as M13.0, M13.10, M13.111, and M13.112.

Code Identity

ICD-10-CM Code
M13
Billable Status
No — Non-Billable Category
Code Describes
Other arthritis
Short Description
Other arthritis
Same as the full description in the CMS dataset.
Chapter
M05-M14
Inflammatory polyarthropathies

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM05-M14Inflammatory polyarthropathies
CategoryM13Other arthritis
This CodeM13Other arthritis

Specific Coding for Other arthritisOverview

Non-specific codes like M13 require more characters. Use one of these billable codes instead:

  • Use M13.0 for Polyarthritis, unspecified

  • M13.1 for Monoarthritis, not elsewhere classified

  • Use M13.10 for Monoarthritis, not elsewhere classified, unspecified site

  • M13.11 for Monoarthritis, not elsewhere classified, shoulder

  • M13.12 for Monoarthritis, not elsewhere classified, elbow

  • M13.13 for Monoarthritis, not elsewhere classified, wrist

  • M13.14 for Monoarthritis, not elsewhere classified, hand

  • M13.15 for Monoarthritis, not elsewhere classified, hip

  • M13.16 for Monoarthritis, not elsewhere classified, knee

  • M13.17 for Monoarthritis, not elsewhere classified, ankle and foot

  • M13.8 for Other specified arthritis

  • Use M13.80 for Other specified arthritis, unspecified site

  • M13.81 for Other specified arthritis, shoulder

  • M13.82 for Other specified arthritis, elbow

  • M13.83 for Other specified arthritis, wrist

  • M13.84 for Other specified arthritis, hand

  • M13.85 for Other specified arthritis, hip

  • M13.86 for Other specified arthritis, knee

  • M13.87 for Other specified arthritis, ankle and foot

  • Use M13.88 for Other specified arthritis, other site

  • Use M13.89 for Other specified arthritis, multiple sites

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to M13: its own notes plus those printed at block M00-M25 and Chapter 13. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

From Block M00-M25 applies to 2,249 codes
  • Disorders affecting predominantly peripheral (limb) joints

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 13 (M00-M99) Diseases of the musculoskeletal system and connective tissue applies to 6,687 codes
  • arthropathic psoriasis (L40.5-)
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • compartment syndrome (traumatic) (T79.A-)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Notes

General instructions on how these codes are used.

From Chapter 13 (M00-M99) Diseases of the musculoskeletal system and connective tissue applies to 6,687 codes
  • Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Patient EducationClinical

Arthritis

If you feel pain and stiffness in your body or have trouble moving around, you might have arthritis. Any disorder that affects the joints is often called arthritis. Joints are places where two bones meet, such as your elbow or knee.

The full article covers:

  • What is arthritis?
  • What are the types of arthritis?
  • What are the symptoms of arthritis?
  • Who is more likely to get arthritis?
  • How is arthritis diagnosed?
  • What are the treatments for arthritis?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About M13Overview

What is the ICD-10 code for other arthritis?

M13 is the ICD-10-CM category for other arthritis, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

Is M13 (Other arthritis) a billable code?

No. This is a category header that groups the codes for other arthritis, and headers cannot be submitted on claims. Claims for other arthritis need a more specific code from this category, such as M13.0, M13.10, and M13.111.