2027 ICD-10-CM Diagnosis Code M12.579Traumatic arthropathy, unspecified ankle and foot
ICD-10-CM Codes›M00–M99›M05-M14›M12
- Billable — Valid for Submission
- Chronic Condition
M12.579 is a billable ICD-10-CM diagnosis code for traumatic arthropathy, unspecified ankle and foot. 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. Coders also document this condition as traumatic arthropathy of 1st metatarsophalangeal joint. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Traumatic arthropathy.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Traumatic arthropathy of 1st metatarsophalangeal joint
- Traumatic arthropathy of interphalangeal joint of toe
- Traumatic arthropathy of lesser metatarsophalangeal joint
- Traumatic arthropathy of subtalar joint
- Traumatic arthropathy of talonavicular joint
- Traumatic arthropathy of the ankle and/or foot
- Traumatic arthropathy-ankle
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to M12.579: 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.
- 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.
- 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-)
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.
- 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.
- 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.
Clinical InformationClinical
Traumatic Arthropathy
any arthropathy that is caused by trauma.
Patient EducationClinical
Ankle Injuries and Disorders
Your ankle bone and the ends of your two lower leg bones make up the ankle joint. Your ligaments, which connect bones to one another, stabilize and support it. Your muscles and tendons move it.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert M12.579 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About M12.579Overview
What is the ICD-10 code for traumatic arthropathy, unspecified ankle and foot?
The ICD-10-CM code for traumatic arthropathy, unspecified ankle and foot is M12.579 (sometimes written as M12579). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is M12.579 (Traumatic arthropathy, ankle and foot) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report traumatic arthropathy, unspecified ankle and foot on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does M12.579 group to?
When traumatic arthropathy, unspecified ankle and foot 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 M12.579 be reported with a code from M19.1?
Not as a rule. The Excludes1 note at M12.5, which applies to M12.579, 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 M12.579?
Under the General Equivalence Mappings, traumatic arthropathy, unspecified ankle and foot converts to ICD-9-CM 716.17 (traum arthropathy-ankle). The mapping is approximate, so confirm the match fits the documentation.
