M21.41 — Flat foot [pes planus] (acquired), right foot
Is M21.41 billable?
Yes — M21.41 is billable for FY2027. M21.41 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. M21.41 may be submitted for encounters from October 1, 2026 through September 30, 2027.
M21.41 at a glance
| Code | M21.41 |
|---|---|
| Description | Flat foot [pes planus] (acquired), right foot |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does M21.41 group to?
M21.41 sits in MDC 08 and helps define the logic of 3 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 564Other Musculoskeletal System and Connective Tissue Diagnoses with MCCmedical
- 565Other Musculoskeletal System and Connective Tissue Diagnoses with CCmedical
- 566Other Musculoskeletal System and Connective Tissue Diagnoses without CC/MCCmedical
How is M21.41 listed in the Alphabetic Index?
The Alphabetic Index lists these routes under M21.4, the nearest indexed parent of M21.41. Use them to find the family, then select the specific code.
- Deformity › limb › flat foot
Excludes1 — never code together — inherited from M21
The conditions below can never be reported together with M21.41 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Excludes1 — never code together — inherited from M21.4
The conditions below can never be reported together with M21.41 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- congenital pes planus (Q66.5-)
Excludes2 — not included here — inherited from Chapter 13
The conditions below are not part of M21.41, but a patient may have both at the same time. When documentation supports it, M21.41 and the excluded code may both 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)
Excludes2 — not included here — inherited from M20-M25
The conditions below are not part of M21.41, but a patient may have both at the same time. When documentation supports it, M21.41 and the excluded code may both be reported.
- joints of the spine (M40-M54)
Excludes2 — not included here — inherited from M21
The conditions below are not part of M21.41, but a patient may have both at the same time. When documentation supports it, M21.41 and the excluded code may both be reported.
How long has M21.41 existed?
M21.41 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.