Version 2024

2024 ICD-10-CM Diagnosis Code M85.0

Fibrous dysplasia (monostotic)

ICD-10-CM Code:
M85.0
ICD-10 Code for:
Fibrous dysplasia (monostotic)
Is Billable?
Not Valid for Submission
Code Navigator:

Code Classification

  • Diseases of the musculoskeletal system and connective tissue
    (M00–M99)
    • Disorders of bone density and structure
      (M80-M85)
      • Other disorders of bone density and structure
        (M85)

M85.0 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of fibrous dysplasia (monostotic). The code is not specific and is NOT valid for the year 2024 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

Specific Coding Applicable to Fibrous dysplasia (monostotic)

Non-specific codes like M85.0 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10-CM codes with a higher level of specificity when coding for fibrous dysplasia (monostotic):

  • Use M85.00 for Fibrous dysplasia (monostotic), unspecified site - BILLABLE CODE

  • M85.01 for Fibrous dysplasia (monostotic), shoulder - NON-BILLABLE CODE

  • Use M85.011 for Fibrous dysplasia (monostotic), right shoulder - BILLABLE CODE

  • Use M85.012 for Fibrous dysplasia (monostotic), left shoulder - BILLABLE CODE

  • Use M85.019 for Fibrous dysplasia (monostotic), unspecified shoulder - BILLABLE CODE

  • M85.02 for Fibrous dysplasia (monostotic), upper arm - NON-BILLABLE CODE

  • Use M85.021 for Fibrous dysplasia (monostotic), right upper arm - BILLABLE CODE

  • Use M85.022 for Fibrous dysplasia (monostotic), left upper arm - BILLABLE CODE

  • Use M85.029 for Fibrous dysplasia (monostotic), unspecified upper arm - BILLABLE CODE

  • M85.03 for Fibrous dysplasia (monostotic), forearm - NON-BILLABLE CODE

  • Use M85.031 for Fibrous dysplasia (monostotic), right forearm - BILLABLE CODE

  • Use M85.032 for Fibrous dysplasia (monostotic), left forearm - BILLABLE CODE

  • Use M85.039 for Fibrous dysplasia (monostotic), unspecified forearm - BILLABLE CODE

  • M85.04 for Fibrous dysplasia (monostotic), hand - NON-BILLABLE CODE

  • Use M85.041 for Fibrous dysplasia (monostotic), right hand - BILLABLE CODE

  • Use M85.042 for Fibrous dysplasia (monostotic), left hand - BILLABLE CODE

  • Use M85.049 for Fibrous dysplasia (monostotic), unspecified hand - BILLABLE CODE

  • M85.05 for Fibrous dysplasia (monostotic), thigh - NON-BILLABLE CODE

  • Use M85.051 for Fibrous dysplasia (monostotic), right thigh - BILLABLE CODE

  • Use M85.052 for Fibrous dysplasia (monostotic), left thigh - BILLABLE CODE

  • Use M85.059 for Fibrous dysplasia (monostotic), unspecified thigh - BILLABLE CODE

  • M85.06 for Fibrous dysplasia (monostotic), lower leg - NON-BILLABLE CODE

  • Use M85.061 for Fibrous dysplasia (monostotic), right lower leg - BILLABLE CODE

  • Use M85.062 for Fibrous dysplasia (monostotic), left lower leg - BILLABLE CODE

  • Use M85.069 for Fibrous dysplasia (monostotic), unspecified lower leg - BILLABLE CODE

  • M85.07 for Fibrous dysplasia (monostotic), ankle and foot - NON-BILLABLE CODE

  • Use M85.071 for Fibrous dysplasia (monostotic), right ankle and foot - BILLABLE CODE

  • Use M85.072 for Fibrous dysplasia (monostotic), left ankle and foot - BILLABLE CODE

  • Use M85.079 for Fibrous dysplasia (monostotic), unspecified ankle and foot - BILLABLE CODE

  • Use M85.08 for Fibrous dysplasia (monostotic), other site - BILLABLE CODE

  • Use M85.09 for Fibrous dysplasia (monostotic), multiple sites - BILLABLE CODE

Tabular List of Diseases and Injuries

The following annotation back-references are applicable to this diagnosis code. The Tabular List of Diseases and Injuries is a list of ICD-10-CM codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more.


Type 2 Excludes

Type 2 Excludes
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
  • fibrous dysplasia of jaw M27.8

Patient Education


Bone Diseases

Your bones help you move, give you shape and support your body. They are living tissues that rebuild constantly throughout your life. During childhood and your teens, your body adds new bone faster than it removes old bone. After about age 20, you can lose bone faster than you make bone. To have strong bones when you are young, and to prevent bone loss when you are older, you need to get enough calcium, vitamin D, and exercise. You should also avoid smoking and drinking too much alcohol.

Bone diseases can make bones easy to break. Different kinds of bone problems include:

  • Low bone density and osteoporosis, which make your bones weak and more likely to break
  • Osteogenesis imperfecta makes your bones brittle
  • Paget's disease of bone makes them weak
  • Bones can also develop cancer and infections
  • Other bone diseases, which are caused by poor nutrition, genetics, or problems with the rate of bone growth or rebuilding

NIH: National Institute of Arthritis and Musculoskeletal and Skin Diseases


[Learn More in MedlinePlus]

Fibrous Dysplasia

Fibrous dysplasia happens when abnormal fibrous (scar-like) tissue replaces healthy bone.
[Learn More in MedlinePlus]

Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.