2027 ICD-10-CM Diagnosis Code M71.861Other specified bursopathies, right knee
ICD-10-CM Codes›M00–M99›M70-M79›M71
- Billable — Valid for Submission
- Not Chronic
M71.861 is a billable ICD-10-CM diagnosis code for other specified bursopathies, right knee. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 557 through 558. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified connective tissue disease.
Code Identity
Code Classification
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to M71.861: its own notes plus those printed at M71 and Chapter 13. A note printed at a category, block or chapter applies to every code under it.
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.
- 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.
Patient EducationClinical
Knee Injuries and Disorders
Your knee joint is made up of bone, cartilage, ligaments and fluid. Muscles and tendons help the knee joint move. When any of these structures is hurt or diseased, you have knee problems. Knee problems can cause pain and difficulty walking.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert M71.861 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About M71.861Overview
What is the ICD-10 code for other specified bursopathies, right knee?
The ICD-10-CM code for other specified bursopathies, right knee is M71.861 (sometimes written as M71861). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is M71.861 (Other specified bursopathies, knee) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report other specified bursopathies, right knee on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does M71.861 group to?
When other specified bursopathies, right knee is the principal diagnosis on an inpatient stay, it groups to MS-DRG 557, 558, with relative weights from 0.8873 to 1.4883 depending on complications. Higher weights mean higher Medicare reimbursement.
Can M71.861 be reported with M20.1?
Not as a rule. The Excludes1 note at M71, which applies to M71.861, lists "bunion (M20.1)". 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 M71.861?
Under the General Equivalence Mappings, other specified bursopathies, right knee converts to ICD-9-CM 727.89 (synov/tend/bursa dis NEC). The mapping is approximate, so confirm the match fits the documentation.
