2027 ICD-10-CM Diagnosis Code M70.921Unspecified soft tissue disorder related to use, overuse and pressure, right upper arm
ICD-10-CM Codes›M00–M99›M70-M79›M70
- Billable — Valid for Submission
- Not Chronic
M70.921 is a billable ICD-10-CM diagnosis code for unspecified soft tissue disorder related to use, overuse and pressure, right upper arm. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 555 through 556. 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 M70.921: its own notes plus those printed at M70 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.
- soft tissue disorders of occupational origin
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)
Use Additional Code
Add a second code, after this one, to fully describe the condition.
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 M70.921, its category, or a range that includes it.
Excludes1 2
These codes carry an Excludes1 note naming M70.921: they are not reported together with it, unless the two conditions are unrelated.
Excludes2 2
These codes carry an Excludes2 note naming M70.921: 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
Arm Injuries and Disorders
Of the 206 bones in your body, three of them are in your arm: the humerus, radius, and ulna. Your arms are also made up of muscles, joints, tendons, and other connective tissue. Injuries to any of these parts of the arm can occur during sports, a fall, or an accident.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert M70.921 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About M70.921Overview
Is M70.921 a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report unspecified soft tissue disorder related to use, overuse and pressure, right upper arm on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does M70.921 group to?
When unspecified soft tissue disorder related to use, overuse and pressure, right upper arm is the principal diagnosis on an inpatient stay, it groups to MS-DRG 555, 556, with relative weights from 0.8210 to 1.2908 depending on complications. Higher weights mean higher Medicare reimbursement.
Can M70.921 be reported with a code from M71.9?
Not as a rule. The Excludes1 note at M70, which applies to M70.921, lists "bursitis NOS (M71.9-)". 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).
Does M70.921 need an additional code?
When the condition applies, yes. The Use Additional Code note at M70, which applies to M70.921, reads: external cause code to identify activity causing disorder (Y93.-). The additional code is reported after M70.921.
What is the ICD-9 equivalent of M70.921?
Under the General Equivalence Mappings, unspecified soft tissue disorder related to use, overuse and pressure, right upper arm converts to ICD-9-CM 729.90 (soft tissue disord NOS). The mapping is approximate, so confirm the match fits the documentation.
