All ICD10 Codes
M00Not billable, use a more specific code below

Pyogenic arthritis

In Infectious arthropathies (M00-M02), chapter 13: Diseases of the Musculoskeletal System and Connective Tissue

97 billable codes under M00: all are a CC; all map to HCC 92 (Bone/Joint/Muscle/Severe Soft Tissue Infections/Necrosis).A CC or MCC (major CC) is a secondary diagnosis that raises the MS-DRG payment. An HCC counts toward a Medicare Advantage patient's risk score.

Advertisements

Instructional notes

Excludes2: not included here, code separately if applicable

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

Official coding guidelines

From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.

Covers site and laterality, acute injury versus chronic musculoskeletal conditions, 7th characters for pathologic fractures, osteoporosis with or without current fracture, and multisystem inflammatory syndrome.

Read Section I.C.13 (page 60)

All codes under M00

M00 can't be used on a claim. Pick a billable code below; grey headings group them.

M00 MS-DRGs

As the principal diagnosis, the billable codes under M00 group to MS-DRG 548, 549, 550, or 400 (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.

Other codes that refer to M00

Notes on these codes point to M00.

  • O99.8 Includes: Conditions in D00-D48, H00-H95, M00-N99, and Q00-Q99
  • Z82.6 Includes: Conditions classifiable to M00-M99
  • Z87.3 Includes: Conditions classifiable to M00-M99

About the condition

Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.

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 more about infectious arthritis on MedlinePlus

Code history

Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.