1. Home
  2. ICD-10-CM Codes
  3. M00–M99
  4. M80-M85
  5. M85
  6. 2024 ICD-10-CM Code M85.5
Version 2024
Non-Billable Code

2024 ICD-10-CM Diagnosis Code M85.5

Aneurysmal bone cyst

ICD-10-CM Code:
M85.5
ICD-10 Code for:
Aneurysmal bone cyst
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)

M85.5 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of aneurysmal bone cyst. 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 Aneurysmal bone cyst

Non-specific codes like M85.5 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 aneurysmal bone cyst:

  • Use M85.50 for Aneurysmal bone cyst, unspecified site - BILLABLE CODE

  • M85.51 for Aneurysmal bone cyst, shoulder - NON-BILLABLE CODE

  • Use M85.511 for Aneurysmal bone cyst, right shoulder - BILLABLE CODE

  • Use M85.512 for Aneurysmal bone cyst, left shoulder - BILLABLE CODE

  • Use M85.519 for Aneurysmal bone cyst, unspecified shoulder - BILLABLE CODE

  • M85.52 for Aneurysmal bone cyst, upper arm - NON-BILLABLE CODE

  • Use M85.521 for Aneurysmal bone cyst, right upper arm - BILLABLE CODE

  • Use M85.522 for Aneurysmal bone cyst, left upper arm - BILLABLE CODE

  • Use M85.529 for Aneurysmal bone cyst, unspecified upper arm - BILLABLE CODE

  • M85.53 for Aneurysmal bone cyst, forearm - NON-BILLABLE CODE

  • Use M85.531 for Aneurysmal bone cyst, right forearm - BILLABLE CODE

  • Use M85.532 for Aneurysmal bone cyst, left forearm - BILLABLE CODE

  • Use M85.539 for Aneurysmal bone cyst, unspecified forearm - BILLABLE CODE

  • M85.54 for Aneurysmal bone cyst, hand - NON-BILLABLE CODE

  • Use M85.541 for Aneurysmal bone cyst, right hand - BILLABLE CODE

  • Use M85.542 for Aneurysmal bone cyst, left hand - BILLABLE CODE

  • Use M85.549 for Aneurysmal bone cyst, unspecified hand - BILLABLE CODE

  • M85.55 for Aneurysmal bone cyst, thigh - NON-BILLABLE CODE

  • Use M85.551 for Aneurysmal bone cyst, right thigh - BILLABLE CODE

  • Use M85.552 for Aneurysmal bone cyst, left thigh - BILLABLE CODE

  • Use M85.559 for Aneurysmal bone cyst, unspecified thigh - BILLABLE CODE

  • M85.56 for Aneurysmal bone cyst, lower leg - NON-BILLABLE CODE

  • Use M85.561 for Aneurysmal bone cyst, right lower leg - BILLABLE CODE

  • Use M85.562 for Aneurysmal bone cyst, left lower leg - BILLABLE CODE

  • Use M85.569 for Aneurysmal bone cyst, unspecified lower leg - BILLABLE CODE

  • M85.57 for Aneurysmal bone cyst, ankle and foot - NON-BILLABLE CODE

  • Use M85.571 for Aneurysmal bone cyst, right ankle and foot - BILLABLE CODE

  • Use M85.572 for Aneurysmal bone cyst, left ankle and foot - BILLABLE CODE

  • Use M85.579 for Aneurysmal bone cyst, unspecified ankle and foot - BILLABLE CODE

  • Use M85.58 for Aneurysmal bone cyst, other site - BILLABLE CODE

  • Use M85.59 for Aneurysmal bone cyst, 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.
  • aneurysmal cyst of jaw M27.4

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]

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.