2027 ICD-10-CM Diagnosis Code M12.521Traumatic arthropathy, right elbow

ICD-10-CM Codes›M00–M99›M05-M14›M12

ICD-10-CM M12.521
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

M12.521 is a billable ICD-10-CM diagnosis code for traumatic arthropathy, right elbow. 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 Traumatic arthropathy.

Code Identity

ICD-10-CM Code
M12.521
Billable Status
Yes — Valid for Submission
Code Describes
Traumatic arthropathy, right elbow
Short Description
Traumatic arthropathy, right elbow
Same as the full description in the CMS dataset.
Parent Code
M12.52
Traumatic arthropathy, elbow

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM05-M14Inflammatory polyarthropathies
CategoryM12Other and unspecified arthropathy
This CodeM12.521Traumatic arthropathy, right elbow

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to M12.521: its own notes plus those printed at M12.5, M12, 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 M12.5 Traumatic arthropathy applies to 24 codes
  • current injury-see Alphabetic Index
  • post-traumatic osteoarthritis of first carpometacarpal joint (M18.2-M18.3)
  • post-traumatic osteoarthritis of hip (M16.4-M16.5)
  • post-traumatic osteoarthritis of knee (M17.2-M17.3)
  • post-traumatic osteoarthritis NOS (M19.1-)
  • post-traumatic osteoarthritis of other single joints (M19.1-)
From M12 Other and unspecified arthropathy applies to 169 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 MUS031
Traumatic arthropathy
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Traumatic Arthropathy

    any arthropathy that is caused by trauma.

Patient EducationClinical

Elbow Injuries and Disorders

Your elbow joint is made up of bone, cartilage, ligaments and fluid. Muscles and tendons help the elbow joint move. When any of these structures is hurt or diseased, you have elbow problems.

Read the full article at MedlinePlus

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

Convert M12.521 to ICD-9-CMHistory

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

ICD-9-CM
716.12 Traum arthropathy-up/arm
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 M12.521Overview

What is the ICD-10 code for traumatic arthropathy, right elbow?

The ICD-10-CM code for traumatic arthropathy, right elbow is M12.521 (sometimes written as M12521). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is M12.521 (Traumatic arthropathy, elbow) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report traumatic arthropathy, right elbow on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does M12.521 group to?

When traumatic arthropathy, right elbow 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.

Can M12.521 be reported with a code from M19.1?

Not as a rule. The Excludes1 note at M12.5, which applies to M12.521, lists "post-traumatic osteoarthritis NOS (M19.1-)". 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).

What is the ICD-9 equivalent of M12.521?

Under the General Equivalence Mappings, traumatic arthropathy, right elbow converts to ICD-9-CM 716.12 (traum arthropathy-up/arm). The mapping is approximate, so confirm the match fits the documentation.