1. Home
  2. ICD-10-CM Codes
  3. M00–M99
  4. M00-M02
  5. M00
  6. 2026 ICD-10-CM Code M00

2026 ICD-10-CM Diagnosis Code M00

Pyogenic arthritis

ICD-10-CM Code:
M00
ICD-10 Code for:
Pyogenic arthritis
Is Billable?
Not Valid for Submission
Code Navigator:

M00 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity from the list below for a diagnosis of pyogenic arthritis. 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 Pyogenic arthritis

Non-specific codes like M00 require more digits to indicate the appropriate level of specificity. Consider using any of the following billable codes with a higher level of specificity when coding for pyogenic arthritis:

  • M00.0 for Staphylococcal arthritis and polyarthritis

  • Use M00.00 for Staphylococcal arthritis, unspecified joint

  • M00.01 for Staphylococcal arthritis, shoulder

  • M00.02 for Staphylococcal arthritis, elbow

  • M00.03 for Staphylococcal arthritis, wrist

  • M00.04 for Staphylococcal arthritis, hand

  • M00.05 for Staphylococcal arthritis, hip

  • M00.06 for Staphylococcal arthritis, knee

  • M00.07 for Staphylococcal arthritis, ankle and foot

  • Use M00.08 for Staphylococcal arthritis, vertebrae

  • Use M00.09 for Staphylococcal polyarthritis

  • M00.1 for Pneumococcal arthritis and polyarthritis

  • Use M00.10 for Pneumococcal arthritis, unspecified joint

  • M00.11 for Pneumococcal arthritis, shoulder

  • M00.12 for Pneumococcal arthritis, elbow

  • M00.13 for Pneumococcal arthritis, wrist

  • M00.14 for Pneumococcal arthritis, hand

  • M00.15 for Pneumococcal arthritis, hip

  • M00.16 for Pneumococcal arthritis, knee

  • M00.17 for Pneumococcal arthritis, ankle and foot

  • Use M00.18 for Pneumococcal arthritis, vertebrae

  • Use M00.19 for Pneumococcal polyarthritis

  • M00.2 for Other streptococcal arthritis and polyarthritis

  • Use M00.20 for Other streptococcal arthritis, unspecified joint

  • M00.21 for Other streptococcal arthritis, shoulder

  • M00.22 for Other streptococcal arthritis, elbow

  • M00.23 for Other streptococcal arthritis, wrist

  • M00.24 for Other streptococcal arthritis, hand

  • M00.25 for Other streptococcal arthritis, hip

  • M00.26 for Other streptococcal arthritis, knee

  • M00.27 for Other streptococcal arthritis, ankle and foot

  • Use M00.28 for Other streptococcal arthritis, vertebrae

  • Use M00.29 for Other streptococcal polyarthritis

  • M00.8 for Arthritis and polyarthritis due to other bacteria

  • Use M00.80 for Arthritis due to other bacteria, unspecified joint

  • M00.81 for Arthritis due to other bacteria, shoulder

  • M00.82 for Arthritis due to other bacteria, elbow

  • M00.83 for Arthritis due to other bacteria, wrist

  • M00.84 for Arthritis due to other bacteria, hand

  • M00.85 for Arthritis due to other bacteria, hip

  • M00.86 for Arthritis due to other bacteria, knee

  • M00.87 for Arthritis due to other bacteria, ankle and foot

  • Use M00.88 for Arthritis due to other bacteria, vertebrae

  • Use M00.89 for Polyarthritis due to other bacteria

  • Use M00.9 for Pyogenic arthritis, unspecified

Code Classification

  • Diseases of the musculoskeletal system and connective tissue
    M00–M99
    • Infectious arthropathies
      M00-M02
      • Pyogenic arthritis
        M00

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.
  • infection and inflammatory reaction due to internal joint prosthesis T84.5

Patient Education


Infectious Arthritis

Most kinds of arthritis cause pain and swelling in your joints. Joints are places where two bones meet, such as your elbow or knee. Infectious arthritis is an infection in the joint. The infection comes from a bacterial, viral, or fungal infection that spreads from another part of the body. Symptoms of infectious arthritis include:

  • Intense pain in the joint
  • Joint redness and swelling
  • Chills and fever
  • Inability to move the area with the infected joint

One type of infectious arthritis is reactive arthritis. The reaction is to an infection somewhere else in your body. The joint is usually the knee, ankle, or toe. Sometimes, reactive arthritis is set off by an infection in the bladder, or in the urethra, which carries urine out of the body. In women, an infection in the vagina can cause the reaction. For both men and women, it can start with bacteria passed on during sex. Another form of reactive arthritis starts with eating food or handling something that has bacteria on it.

To diagnose infectious arthritis, your health care provider may do tests of your blood, urine, and joint fluid. Treatment includes medicines and sometimes surgery.


[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.