2027 ICD-10-CM Diagnosis Code M00Pyogenic arthritis

ICD-10-CM Codes›M00–M99›M00-M02›M00

ICD-10-CM M00
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

M00 is a non-billable ICD-10-CM category code for pyogenic arthritis, so it cannot be submitted on claims. Use a more specific code from this category instead, such as M00.00, M00.011, M00.012, and M00.019.

Code Identity

ICD-10-CM Code
M00
Billable Status
No — Non-Billable Category
Code Describes
Pyogenic arthritis
Short Description
Pyogenic arthritis
Same as the full description in the CMS dataset.
Chapter
M00-M02
Infectious arthropathies

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM00-M02Infectious arthropathies
CategoryM00Pyogenic arthritis
This CodeM00Pyogenic arthritis

Specific Coding for Pyogenic arthritisOverview

Non-specific codes like M00 require more characters. Use one of these billable codes instead:

  • 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

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to M00: its own notes plus those printed at block M00-M25, block M00-M02, and Chapter 13. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

From Block M00-M25 applies to 2,249 codes
  • Disorders affecting predominantly peripheral (limb) joints

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

On M00 itself
  • infection and inflammatory reaction due to internal joint prosthesis (T84.5-)
From Chapter 13 (M00-M99) Diseases of the musculoskeletal system and connective tissue applies to 6,687 codes
  • arthropathic psoriasis (L40.5-)
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • compartment syndrome (traumatic) (T79.A-)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Notes

General instructions on how these codes are used.

From Block M00-M02 Infectious arthropathies applies to 242 codes
  • This block comprises arthropathies due to microbiological agents. Distinction is made between the following types of etiological relationship:
  • a) direct infection of joint, where organisms invade synovial tissue and microbial antigen is present in the joint;
  • b) indirect infection, which may be of two types: a reactive arthropathy, where microbial infection of the body is established but neither organisms nor antigens can be identified in the joint, and a postinfective arthropathy, where microbial antigen is present but recovery of an organism is inconstant and evidence of local multiplication is lacking.
From Chapter 13 (M00-M99) Diseases of the musculoskeletal system and connective tissue applies to 6,687 codes
  • Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Patient EducationClinical

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:

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About M00Overview

What is the ICD-10 code for pyogenic arthritis?

M00 is the ICD-10-CM category for pyogenic arthritis, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

Is M00 (Pyogenic arthritis) a billable code?

No. This is a category header that groups the codes for pyogenic arthritis, and headers cannot be submitted on claims. Claims for pyogenic arthritis need a more specific code from this category, such as M00.00, M00.011, and M00.012.