2027 ICD-10-CM Diagnosis Code M14.861Arthropathies in other specified diseases classified elsewhere, right knee
ICD-10-CM Codes›M00–M99›M05-M14›M14
- Billable — Valid for Submission
- Not Chronic
M14.861 is a billable ICD-10-CM diagnosis code for arthropathies in other specified diseases classified elsewhere, right knee. 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. The code is a manifestation code that cannot be reported as the principal diagnosis. Coders also document this condition as arthropathy of right knee due to Behcet syndrome. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified joint disorders.
Code Identity
Code Classification
Code EditsBilling
Medicare Code Editor checks that affect claim validity for M14.861.
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Arthropathy of right knee due to Behcet syndrome
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to M14.861: its own notes plus those printed at M14.8, M14, 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.
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.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name M14.861, its category, or a range that includes it.
Excludes1 1
These codes carry an Excludes1 note naming M14.861: they are not reported together with it, unless the two conditions are unrelated.
Excludes2 1
These codes carry an Excludes2 note naming M14.861: its condition is not part of those codes, and both may be reported when the patient has both.
Use Additional Code 1
These codes say to use an additional code from the note, and M14.861 is one of the codes named.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Joint Disorders
Your joints are places where two or more bones come together. Your shoulders, elbows, hips, knees, and knuckles are all joints. Your spine has joints, too.
The full article covers:
- What are joints?
- What are joint disorders?
- What diseases can affect the joints?
- What types of joint disorders happen from sudden injuries?
- What types of joint disorders happen from overuse?
- How can I keep my joints healthy?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert M14.861 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About M14.861Overview
Is M14.861 a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report arthropathies in other specified diseases classified elsewhere, right knee on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does M14.861 group to?
On inpatient claims, arthropathies in other specified diseases classified elsewhere, right knee maps to MS-DRG 554, 553, with relative weights from 0.8328 to 1.2492 depending on complications. Higher weights mean higher Medicare reimbursement.
Can M14.861 be a principal diagnosis?
No. This is a manifestation code: arthropathies in other specified diseases classified elsewhere, right knee describes the manifestation of an underlying disease rather than the disease itself, so the underlying condition is sequenced first.
Can M14.861 be reported with M36.4?
Not as a rule. The Excludes1 note at M14, which applies to M14.861, lists "hypersensitivity reactions (M36.4)". 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 coded first with M14.861?
The Code First note at M14.8, which applies to M14.861, reads: underlying disease, such as: amyloidosis (E85.-); erythema multiforme (L51.-); erythema nodosum (L52); hemochromatosis (E83.11-); hyperparathyroidism (E21.-); and 4 more listed in the Instructional Notes section. When one of these applies, it is sequenced before M14.861.
