2027 ICD-10-CM Diagnosis Code M13.819Other specified arthritis, unspecified shoulder

ICD-10-CM Codes›M00–M99›M05-M14›M13

ICD-10-CM M13.819
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

M13.819 is a billable ICD-10-CM diagnosis code for other specified arthritis, unspecified shoulder. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 553 through 554. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified joint disorders.

Code Identity

ICD-10-CM Code
M13.819
Billable Status
Yes — Valid for Submission
Code Describes
Other specified arthritis, unspecified shoulder
Short Description
Other specified arthritis, unspecified shoulder
Same as the full description in the CMS dataset.
Parent Code
M13.81
Other specified arthritis, shoulder

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM05-M14Inflammatory polyarthropathies
CategoryM13Other arthritis
This CodeM13.819Other specified arthritis, unspecified shoulder

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Allergic arthritis
  • Allergic arthritis of the shoulder region
  • Arthritis of acromioclavicular joint
  • Arthritis of glenohumeral joint
  • Arthritis of shoulder region joint
  • Arthropathy due to hypersensitivity reaction
  • Climacteric arthritis
  • Climacteric arthritis of the shoulder region
  • Inflammation of joint of shoulder region
  • Inflammation of shoulder joint
  • Musculoskeletal disorder during menopause

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to M13.819: its own notes plus those printed at M13.8, M13, 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.

From M13.8 Other specified arthritis applies to 24 codes
From M13 Other arthritis applies to 47 codes

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.

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR MUS007
Other specified joint disorders
Default principal diagnosis: inpatient Yes · outpatient Yes

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.

Convert M13.819 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
716.21 Allerg arthritis-shlder
Approximate The match is approximate rather than exact.

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 M13.819Overview

What is the ICD-10 code for other specified arthritis, unspecified shoulder?

The ICD-10-CM code for other specified arthritis, unspecified shoulder is M13.819 (sometimes written as M13819). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is M13.819 (Other specified arthritis, shoulder) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report other specified arthritis, unspecified shoulder on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does M13.819 group to?

When other specified arthritis, unspecified shoulder is the principal diagnosis on an inpatient stay, it groups to MS-DRG 554, 553, with relative weights from 0.8328 to 1.2492 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of M13.819?

Under the General Equivalence Mappings, other specified arthritis, unspecified shoulder converts to ICD-9-CM 716.21 (allerg arthritis-shlder). The mapping is approximate, so confirm the match fits the documentation.