Arthritis Unspecified ICD-10-CM Codes

Read this short guide to learn about Arthritis Unspecified ICD codes you can use. Learn clinical information and billing details here.

By Alex King on Aug 8, 2025.

Fact Checked by Ericka Pingol.

Use Code

What Arthritis Unspecified ICD codes can I use?

Here are some of the Arthritis Unspecified ICD codes you can use:

M06.9 - Rheumatoid arthritis, unspecified

This is best used on patients confirmed to have Rheumatoid Arthritis, which is an autoimmune and inflammatory disease that causes swelling in affected areas as a result of the immune system mistakenly attacking healthy cells.

M00.9 - Pyogenic arthritis, unspecified

This is best used on patients confirmed to have Pyogenic Arthritis, also known as Septic Arthritis. The infection of certain joints characterizes this type of Arthritis as a result of germs that travel along the bloodstream from other parts of the body. Just like with any other Arthritis, there will be swelling, but the person is also at risk of catching a fever.

M00.00 - Staphylococcal arthritis, unspecified joint

This is best used on patients confirmed to have Staphylococcal Arthritis, a type of Septic Arthritis caused by Staphylococcus aureus bacteria.

M00.10 - Pneumococcal arthritis, unspecified joint

This is best used on patients confirmed to have Pneumococcal Arthritis, a type of Septic Arthritis caused by Streptococcus pneumoniae bacteria. This type of Septic Arthritis is uncommon.

M00.80 - Arthritis due to other bacteria, unspecified joint

This is best used only when you have a patient with Arthritis caused by bacteria, and their kind of Arthritis doesn’t have a specific ICD-10 code.

M08.90 - Juvenile arthritis, unspecified, unspecified site

This is best used on children with arthritis, hence the Juvenile in the name. This is not good because children are still growing. Arthritis can cause permanent damage to joints, resulting in children growing up with physical disabilities and mobility issues.

Are these Arthritis Unspecified ICD codes billable?

Yes. All of the aforementioned Arthritis Unspecified-related ICD-10 codes are valid and billable.

Clinical information about Arthritis:

Arthritis is a type of disease characterized by the inflammation/swelling of joints and their degeneration. Whether the joint is swelling or breaking down, it will cause pain of varying levels.
There are different types of Arthritis, as indicated by the list above.
The most common type is Osteoarthritis, which comes with age and the wear and tear of our joints over the years. While age is a factor, what counts more is the constant stress that joints undergo
Other types not mentioned in the list above include:

Psoriatic Arthritis. This one is characterized by inflammations that develop due to Psoriasis, an autoimmune condition that causes skin irritation.

Ankylosing Spondylitis. While it doesn’t have Arthritis in its name, it is the Arthritis of the spine (commonly the lower regions).

Gout. This is another one that doesn’t mention Arthritis in its name. It is a type of Arthritis characterized by the emergence of uric acid crystals in the joints. These crystals are hard and sharp, and they can cause a recurring kind of pain.

Synonyms include:

Rheumatic arthritis
Rheumatoid arthritis
Infectious arthritis of temporomandibular joint
Staphylococcal arthritis and polyarthritis
Pneumococcal arthritis and polyarthritis
Arthritis caused by spirochaetale infection
Arthritis of finger of right hand
Arthritis of left sacroiliac joint
Arthritis of right sacroiliac joint
Arthritis of right sternoclavicular joint
Gout

Commonly asked questions

To give you an idea, about 50 million adult Americans and 300,000 American children have Arthritis.

The biggest risk factor is age, which can’t be controlled. The older you get, the more at risk you are of getting it. Your sex can also affect it; women are more at risk of developing Arthritis than men.

Two other factors can put a person at risk of developing it, and luckily, these factors can be controlled. These include lifestyle choices, and obesity, among others.

That depends on what type of Arthritis they’re treating and how severe it is. Basic treatment includes administering anti-inflammatory medicine and biologics, injection of cortisone or viscosupplementation, and recommending or conducting physical therapy programs. Joint fusion or replacements become an option only for severe cases.

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