2027 ICD-10-CM Diagnosis Code M19Other and unspecified osteoarthritis

ICD-10-CM Codes›M00–M99›M15-M19›M19

ICD-10-CM M19
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

M19 is a non-billable ICD-10-CM category code for other and unspecified osteoarthritis, so it cannot be submitted on claims. Use a more specific code from this category instead, such as M19.011, M19.012, M19.019, and M19.021.

Code Identity

ICD-10-CM Code
M19
Billable Status
No — Non-Billable Category
Code Describes
Other and unspecified osteoarthritis
Short Description
Other and unspecified osteoarthritis
Same as the full description in the CMS dataset.
Chapter
M15-M19
Osteoarthritis

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM15-M19Osteoarthritis
CategoryM19Other and unspecified osteoarthritis
This CodeM19Other and unspecified osteoarthritis

Specific Coding for Other and unspecified osteoarthritisOverview

Non-specific codes like M19 require more characters. Use one of these billable codes instead:

  • M19.0 for Primary osteoarthritis of other joints

  • M19.01 for Primary osteoarthritis, shoulder

  • M19.02 for Primary osteoarthritis, elbow

  • M19.03 for Primary osteoarthritis, wrist

  • M19.04 for Primary osteoarthritis, hand

  • M19.07 for Primary osteoarthritis ankle and foot

  • Use M19.09 for Primary osteoarthritis, other specified site

  • M19.1 for Post-traumatic osteoarthritis of other joints

  • M19.11 for Post-traumatic osteoarthritis, shoulder

  • M19.12 for Post-traumatic osteoarthritis, elbow

  • M19.13 for Post-traumatic osteoarthritis, wrist

  • M19.14 for Post-traumatic osteoarthritis, hand

  • M19.17 for Post-traumatic osteoarthritis, ankle and foot

  • Use M19.19 for Post-traumatic osteoarthritis, other specified site

  • M19.2 for Secondary osteoarthritis of other joints

  • M19.21 for Secondary osteoarthritis, shoulder

  • M19.22 for Secondary osteoarthritis, elbow

  • M19.23 for Secondary osteoarthritis, wrist

  • M19.24 for Secondary osteoarthritis, hand

  • M19.27 for Secondary osteoarthritis, ankle and foot

  • Use M19.29 for Secondary osteoarthritis, other specified site

  • M19.9 for Osteoarthritis, unspecified site

  • Use M19.90 for Unspecified osteoarthritis, unspecified site

  • Use M19.91 for Primary osteoarthritis, unspecified site

  • Use M19.92 for Post-traumatic osteoarthritis, unspecified site

  • Use M19.93 for Secondary osteoarthritis, unspecified site

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to M19: its own notes plus those printed at block M00-M25, block M15-M19, 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.

On M19 itself
  • arthrosis of spine (M47.-)
  • hallux rigidus (M20.2)
  • osteoarthritis of spine (M47.-)
From Block M15-M19 Osteoarthritis applies to 98 codes
  • osteoarthritis of spine (M47.-)
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.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name M19, its category, or a range that includes it.

Excludes1 5

These codes carry an Excludes1 note naming M19: they are not reported together with it, unless the two conditions are unrelated.

  • M12 Other and unspecified arthropathy
    arthrosis (M15-M19) names M15-M19, which includes this code
  • M13 Other arthritis
    arthrosis (M15-M19) names M15-M19, which includes this code
  • M13 Other arthritis
    osteoarthritis (M15-M19) names M15-M19, which includes this code
  • M13.8 Other specified arthritis
    osteoarthritis (M15-M19) names M15-M19, which includes this code
  • M15 Polyosteoarthritis
    bilateral involvement of single joint (M16-M19) names M16-M19, which includes this code

Patient EducationClinical

Osteoarthritis

Osteoarthritis, sometimes called OA, is a type of arthritis that only affects the joints, usually in the hands, knees, hips, neck, and lower back. It's the most common type of arthritis.

The full article covers:

  • What is osteoarthritis?
  • What are the symptoms of osteoarthritis?
  • What causes osteoarthritis?
  • Who is more likely to develop osteoarthritis?
  • How is osteoarthritis diagnosed?
  • What are the treatments for osteoarthritis?

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 M19Overview

What is the ICD-10 code for other and unspecified osteoarthritis?

M19 is the ICD-10-CM category for other and unspecified osteoarthritis, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

Is M19 (Other and unspecified osteoarthritis) a billable code?

No. This is a category header that groups the codes for other and unspecified osteoarthritis, and headers cannot be submitted on claims. Claims for other and unspecified osteoarthritis need a more specific code from this category, such as M19.011, M19.012, and M19.019.

Can M19 be reported with a code from M15?

Not as a rule. The Excludes1 note on M19 lists "polyarthritis (M15.-)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).