Is ICD-10-CM code M72.21 billable?

Yes, M72.21 (Plantar fascial fibromatosis, right foot) is a billable ICD-10-CM diagnosis code, valid for reimbursement on HIPAA-covered transactions for FY2027.

What chapter does ICD-10-CM code M72.21 belong to?

M72.21 belongs to Chapter 13 of the ICD-10-CM tabular list: M00–M99 (Diseases of the Musculoskeletal System and Connective Tissue).

Is M72.21 a new ICD-10-CM code for 2027?

Yes, M72.21 was added or revised in the FY2027 ICD-10-CM update, effective October 1, 2026, as published by the Centers for Medicare and Medicaid Services (CMS).

M72.21Billable, valid for claims from October 1, 2026New for FY2027

Plantar fascial fibromatosis, right foot

Under M72.2 Plantar fascial fibromatosis, in Other soft tissue disorders (M70-M79), chapter 13: Diseases of the Musculoskeletal System and Connective Tissue

M72.21 is billable and valid on claims for FY 2027. If the record has more detail, check the other codes under M72.2 below.
As a secondary diagnosis it is not a CC or MCC, so it doesn't raise the MS-DRG payment.

Instructional notes

Also applies, from M72.2: Plantar fascial fibromatosis

These notes sit on M72.2 and apply to every code under it, including M72.21.

Includes: conditions that are coded here

Ledderhose disease

Also applies, from M72: Fibroblastic disorders

These notes sit on M72 and apply to every code under it, including M72.21.

Excludes2: not included here, code separately if applicable

retroperitoneal fibromatosis (D48.3)

Other codes under M72.2

Plantar fascial fibromatosis

M72.20Plantar fascial fibromatosis, unspecified foot
M72.21Plantar fascial fibromatosis, right foot(this code)
M72.22Plantar fascial fibromatosis, left foot

MS-DRGs

As the principal diagnosis, this code groups to these MS-DRGs (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.

About the condition

Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.

Connective Tissue Disorders

Your connective tissue supports many different parts of your body, such as your skin, eyes, and heart. It is like a "cellular glue" that gives your body parts their shape and helps keep them strong. It also helps some of your tissues do their work. It is made of many kinds of proteins. Cartilage and fat are types of connective tissue.

Code history

Added in FY2027 (effective October 1, 2026). Before that, these cases were coded as M72.2 (Plantar fascial fibromatosis). No changes since.