2027 ICD-10-CM Diagnosis Code M60.003Infective myositis, unspecified right leg
ICD-10-CM Codes›M00–M99›M60-M63›M60
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- Not Chronic
M60.003 is a billable ICD-10-CM diagnosis code for infective myositis, unspecified right leg. 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. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 222 closely related codes. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Muscle disorders.
Code Identity
Code Classification
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to M60.003: its own notes plus those printed at M60.0, M60, block M60-M63, and Chapter 13. A note printed at a category, block or chapter applies to every code under it.
Applicable To
Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.
- Infective myositis, right lower limb NOS
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 M60.003, its category, or a range that includes it.
Excludes1 2
These codes carry an Excludes1 note naming M60.003: they are not reported together with it, unless the two conditions are unrelated.
Index to Diseases and InjuriesGuidance
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Infectious Myositis
an infectious process affecting the skeletal muscles. it can be caused by viruses (including hiv), bacteria, fungi, and parasites. symptoms include muscle weakness and muscle pain.Myositis
inflammation of a muscle or muscle tissue.
Patient EducationClinical
Myositis
Myositis means inflammation of the muscles that you use to move your body. An injury, infection, or autoimmune disease can cause it. Two specific kinds are polymyositis and dermatomyositis. Polymyositis causes muscle weakness, usually in the muscles closest to the trunk of your body.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert M60.003 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About M60.003Overview
What is the ICD-10 code for infective myositis, unspecified right leg?
The ICD-10-CM code for infective myositis, unspecified right leg is M60.003 (sometimes written as M60003). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is M60.003 (Infective myositis, unspecified site) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report infective myositis, unspecified right leg on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does M60.003 group to?
When infective myositis, unspecified right leg 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.
Is M60.003 a CC or MCC?
CMS lists M60.003 as a CC (complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 222 closely related codes in its exclusion list.
Can M60.003 be reported with a code from M33?
Not as a rule. The Excludes1 note at block M60-M63, which applies to M60.003, lists "dermatopolymyositis (M33.-)". 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).
