ICD-10-CM 2027 diagnosis code
M61.1Myositis ossificans progressiva
M61.1 is a header code, so it can't be reported by itself. Choose one of the 10 more specific codes beneath it.
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About M61.1
M61.1 is the ICD-10-CM diagnosis code for myositis ossificans progressiva. It belongs to category M61 (calcification and ossification of muscle), block M60-M63 (disorders of muscles) and chapter 13 (diseases of the musculoskeletal system and connective tissue). It is a header code, so it can't be reported by itself; one of its 10 subcodes must be used instead.
Within M61 (calcification and ossification of muscle), M61.1 is specifically for myositis ossificans progressiva. Related codes cover myositis ossificans traumatica (M61.0), paralytic calcification and ossification of muscle (M61.2), s associated with burns (M61.3), other calcification of muscle (M61.4), other ossification of muscle (M61.5) and unspecified (M61.9).
To report this condition, pick the subcode that matches the documentation: M61.10 (unspecified site), M61.11 (shoulder), M61.12 (upper arm), M61.13 (forearm), M61.14 (hand and finger(s)), M61.15 (thigh), M61.16 (lower leg), M61.17 (ankle, foot and toe(s)) and 2 more.
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Specific codes under M61.1
- M61.10Myositis ossificans progressiva, unspecified siteBillable
- M61.11Myositis ossificans progressiva, shoulder
- M61.12Myositis ossificans progressiva, upper arm
- M61.13Myositis ossificans progressiva, forearm
- M61.14Myositis ossificans progressiva, hand and finger(s)
- M61.141Myositis ossificans progressiva, right handBillable
- M61.142Myositis ossificans progressiva, left handBillable
- M61.143Myositis ossificans progressiva, unspecified handBillable
- M61.144Myositis ossificans progressiva, right finger(s)Billable
- M61.145Myositis ossificans progressiva, left finger(s)Billable
- M61.146Myositis ossificans progressiva, unspecified finger(s)Billable
- M61.15Myositis ossificans progressiva, thigh
- M61.16Myositis ossificans progressiva, lower leg
- M61.17Myositis ossificans progressiva, ankle, foot and toe(s)
- M61.171Myositis ossificans progressiva, right ankleBillable
- M61.172Myositis ossificans progressiva, left ankleBillable
- M61.173Myositis ossificans progressiva, unspecified ankleBillable
- M61.174Myositis ossificans progressiva, right footBillable
- M61.175Myositis ossificans progressiva, left footBillable
- M61.176Myositis ossificans progressiva, unspecified footBillable
- M61.177Myositis ossificans progressiva, right toe(s)Billable
- M61.178Myositis ossificans progressiva, left toe(s)Billable
- M61.179Myositis ossificans progressiva, unspecified toe(s)Billable
- M61.18Myositis ossificans progressiva, other siteBillable
- M61.19Myositis ossificans progressiva, multiple sitesBillable
Coding notes
- Fibrodysplasia ossificans progressiva
Notes that apply from higher levels
Instructions written at a parent level also apply to M61.1.
Broader instructions also apply from M60-M63 Disorders of muscles and Chapter 13: Diseases of the musculoskeletal system and connective tissue.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about M61.1
Is M61.1 billable?
- No. M61.1 is a header code. Report one of its more specific subcodes instead.