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  6. 2026 ICD-10-CM Code M11

2026 ICD-10-CM Diagnosis Code M11

Other crystal arthropathies

ICD-10-CM Code:
M11
ICD-10 Code for:
Other crystal arthropathies
Is Billable?
Not Valid for Submission
Code Navigator:

M11 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of other crystal arthropathies. The code is not specific and is NOT valid for the year 2026 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 Other crystal arthropathies

Non-specific codes like M11 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 other crystal arthropathies:

  • M11.0 for Hydroxyapatite deposition disease - NON-BILLABLE CODE

  • Use M11.00 for Hydroxyapatite deposition disease, unspecified site - BILLABLE CODE

  • M11.01 for Hydroxyapatite deposition disease, shoulder - NON-BILLABLE CODE

  • M11.02 for Hydroxyapatite deposition disease, elbow - NON-BILLABLE CODE

  • M11.03 for Hydroxyapatite deposition disease, wrist - NON-BILLABLE CODE

  • M11.04 for Hydroxyapatite deposition disease, hand - NON-BILLABLE CODE

  • M11.05 for Hydroxyapatite deposition disease, hip - NON-BILLABLE CODE

  • M11.06 for Hydroxyapatite deposition disease, knee - NON-BILLABLE CODE

  • M11.07 for Hydroxyapatite deposition disease, ankle and foot - NON-BILLABLE CODE

  • Use M11.08 for Hydroxyapatite deposition disease, vertebrae - BILLABLE CODE

  • Use M11.09 for Hydroxyapatite deposition disease, multiple sites - BILLABLE CODE

  • M11.1 for Familial chondrocalcinosis - NON-BILLABLE CODE

  • Use M11.10 for Familial chondrocalcinosis, unspecified site - BILLABLE CODE

  • M11.11 for Familial chondrocalcinosis, shoulder - NON-BILLABLE CODE

  • M11.12 for Familial chondrocalcinosis, elbow - NON-BILLABLE CODE

  • M11.13 for Familial chondrocalcinosis, wrist - NON-BILLABLE CODE

  • M11.14 for Familial chondrocalcinosis, hand - NON-BILLABLE CODE

  • M11.15 for Familial chondrocalcinosis, hip - NON-BILLABLE CODE

  • M11.16 for Familial chondrocalcinosis, knee - NON-BILLABLE CODE

  • M11.17 for Familial chondrocalcinosis, ankle and foot - NON-BILLABLE CODE

  • Use M11.18 for Familial chondrocalcinosis, vertebrae - BILLABLE CODE

  • Use M11.19 for Familial chondrocalcinosis, multiple sites - BILLABLE CODE

  • M11.2 for Other chondrocalcinosis - NON-BILLABLE CODE

  • Use M11.20 for Other chondrocalcinosis, unspecified site - BILLABLE CODE

  • M11.21 for Other chondrocalcinosis, shoulder - NON-BILLABLE CODE

  • M11.22 for Other chondrocalcinosis, elbow - NON-BILLABLE CODE

  • M11.23 for Other chondrocalcinosis, wrist - NON-BILLABLE CODE

  • M11.24 for Other chondrocalcinosis, hand - NON-BILLABLE CODE

  • M11.25 for Other chondrocalcinosis, hip - NON-BILLABLE CODE

  • M11.26 for Other chondrocalcinosis, knee - NON-BILLABLE CODE

  • M11.27 for Other chondrocalcinosis, ankle and foot - NON-BILLABLE CODE

  • Use M11.28 for Other chondrocalcinosis, vertebrae - BILLABLE CODE

  • Use M11.29 for Other chondrocalcinosis, multiple sites - BILLABLE CODE

  • M11.8 for Other specified crystal arthropathies - NON-BILLABLE CODE

  • Use M11.80 for Other specified crystal arthropathies, unspecified site - BILLABLE CODE

  • M11.81 for Other specified crystal arthropathies, shoulder - NON-BILLABLE CODE

  • M11.82 for Other specified crystal arthropathies, elbow - NON-BILLABLE CODE

  • M11.83 for Other specified crystal arthropathies, wrist - NON-BILLABLE CODE

  • M11.84 for Other specified crystal arthropathies, hand - NON-BILLABLE CODE

  • M11.85 for Other specified crystal arthropathies, hip - NON-BILLABLE CODE

  • M11.86 for Other specified crystal arthropathies, knee - NON-BILLABLE CODE

  • M11.87 for Other specified crystal arthropathies, ankle and foot - NON-BILLABLE CODE

  • Use M11.88 for Other specified crystal arthropathies, vertebrae - BILLABLE CODE

  • Use M11.89 for Other specified crystal arthropathies, multiple sites - BILLABLE CODE

  • Use M11.9 for Crystal arthropathy, unspecified - BILLABLE CODE

Code Classification

  • Diseases of the musculoskeletal system and connective tissue
    M00–M99
    • Inflammatory polyarthropathies
      M05-M14
      • Other crystal arthropathies
        M11

Clinical Information

  • Crystal Arthropathies

    joint disorders that are characterized by accumulation of microcrystals in and around the joint including in the synovial fluid. they are classified according to the chemical nature of the crystals such as calcium pyrophosphate; basic calcium phosphates; and monosodium urate (see uric acid).

Patient Education


Arthritis

What is arthritis?

If you feel pain and stiffness in your body or have trouble moving around, you might have arthritis. Any disorder that affects the joints is often called arthritis. Joints are places where two bones meet, such as your elbow or knee.

Most types of arthritis can cause joint pain and inflammation (swelling). Over time, a swollen joint can become severely damaged. Some kinds of arthritis can also cause problems in your organs, such as your eyes or skin. Treatment will depend on the type of arthritis you have.

What are the types of arthritis?

Common types of arthritis include:

  • Osteoarthritis is the most common type of arthritis. It's often related to aging or injury.
  • Autoimmune arthritis happens when your body's immune system attacks healthy cells in your body by mistake. Rheumatoid arthritis is the most common form of this type of arthritis.
  • Juvenile arthritis is a type of arthritis that happens in children.
  • Infectious arthritis is an infection that has spread from another part of your body to the joint. Reactive arthritis is one type.
  • Psoriatic arthritis affects people with psoriasis (itchy or sore scaly red and white skin patches).
  • Gout is a painful type of arthritis that happens when too much uric acid builds up in your body. It often starts in the big toe. Other joints can also be affected.
  • Ankylosing spondylitis is a type of arthritis of the spine that can cause stiffness and make it difficult to move and bend.

What are the symptoms of arthritis?

Pain, redness, warmth, and joint inflammation are common arthritis symptoms. You may not be able to move your joint as well as it should. Other symptoms could include fever, weight loss, breathing difficulties, or a rash.

Symptoms often get worse as you age. Some symptoms of arthritis may be signs of other illnesses.

Who is more likely to get arthritis?

A few things that might increase your chance of getting arthritis include:

  • Family history. You may be more likely to get certain types of arthritis if a member of your family has the disorder.
  • Age. The risk of getting many types of arthritis increases with age.
  • Sex. Certain types of arthritis are more common in women, while other types are more common in men.

Other factors that might increase your risk of getting arthritis include having a previous joint injury, obesity, or lupus.

How is arthritis diagnosed?

To find out if you have arthritis, your health care provider may:

  • Ask you about your medical history, including your symptoms.
  • Do a physical exam.
  • Order blood tests or take x-rays.

Your provider may refer you to a rheumatologist (a doctor who specializes in arthritis care) for tests, diagnosis, and care.

What are the treatments for arthritis?

Treatment depends on the type of arthritis you have. It may include medicine or surgery. Your provider will work with you to improve your symptoms and quality of life.

A few ways to help manage your symptoms include:

  • Hot or cold packs
  • Relaxation techniques
  • Use of splints, braces, and/or assistive devices

NIH: National Institute of Arthritis and Musculoskeletal and Skin Diseases


[Learn More in MedlinePlus]

Code History

  • FY 2026 - No Change, effective from 10/1/2025 through 9/30/2026
  • FY 2025 - No Change, effective from 10/1/2024 through 9/30/2025
  • 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.