2027 ICD-10-CM Diagnosis Code M71.331Other bursal cyst, right wrist
ICD-10-CM Codes›M00–M99›M70-M79›M71
- Billable — Valid for Submission
- Not Chronic
M71.331 is a billable ICD-10-CM diagnosis code for other bursal cyst, right wrist. 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 mass of joint of right wrist. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified connective tissue disease.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Mass of joint of right wrist
- Mass of joint of right wrist region
- Synovial cyst of right wrist
- Synovial cyst of wrist
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to M71.331: its own notes plus those printed at M71.3, 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.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name M71.331, its category, or a range that includes it.
Excludes2 2
These codes carry an Excludes2 note naming M71.331: its condition is not part of those codes, and both may be reported when the patient has both.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Wrist Injuries and Disorders
Your wrist connects your hand to your forearm. It is not one big joint; it has several small joints. This makes it flexible and allows you to move your hand in different ways. The wrist has two big forearm bones and eight small bones known as carpals. It also has tendons and ligaments, which are connective tissues.
The full article covers:
- What are the types of wrist injuries and disorders?
- Who is at risk for wrist injuries and disorders?
- What are the symptoms of wrist injuries and disorders?
- How are wrist injuries and disorders diagnosed?
- What are the treatments for wrist injuries and disorders?
- Can wrist injuries and disorders be prevented?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert M71.331 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About M71.331Overview
What is the ICD-10 code for other bursal cyst, right wrist?
The ICD-10-CM code for other bursal cyst, right wrist is M71.331 (sometimes written as M71331). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is M71.331 (Other bursal cyst, wrist) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report other bursal cyst, right wrist on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does M71.331 group to?
When other bursal cyst, right wrist 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 M71.331 be reported with a code from M66.1?
Not as a rule. The Excludes1 note at M71.3, which applies to M71.331, lists "synovial cyst with rupture (M66.1-)". 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 M71.331?
Under the General Equivalence Mappings, other bursal cyst, right wrist converts to ICD-9-CM 727.49 (bursal cyst NEC). The mapping is approximate, so confirm the match fits the documentation.
