2027 ICD-10-CM Diagnosis Code M67.864Other specified disorders of tendon, left knee
ICD-10-CM Codes›M00–M99›M65-M67›M67
- Billable — Valid for Submission
- Not Chronic
M67.864 is a billable ICD-10-CM diagnosis code for other specified disorders of tendon, left 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. Coders also document this condition as bilateral tendinitis of knees. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Tendon and synovial disorders.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Bilateral tendinitis of knees
- Bilateral tendinosis of knees
- Inflammation of tendon of left sartorius
- Inflammation of tendon of sartorius
- Tendinitis of left knee
- Tendinitis of right knee
- Tendinosis of knee region
- Tendinosis of left knee
- Tendinosis of right knee
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to M67.864: its own notes plus those printed at M67 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 M67.864 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About M67.864Overview
What is the ICD-10 code for other specified disorders of tendon, left knee?
The ICD-10-CM code for other specified disorders of tendon, left knee is M67.864 (sometimes written as M67864). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is M67.864 (Other specified disorders of synovium and tendon, knee) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report other specified disorders of tendon, left knee on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does M67.864 group to?
When other specified disorders of tendon, left 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 M67.864 be reported with M72.0?
Not as a rule. The Excludes1 note at M67, which applies to M67.864, lists "palmar fascial fibromatosis [Dupuytren] (M72.0)". 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 M67.864?
Under the General Equivalence Mappings, other specified disorders of tendon, left knee converts to ICD-9-CM 727.89 (synov/tend/bursa dis NEC). The mapping is approximate, so confirm the match fits the documentation.
