2020 ICD-10-CM Diagnosis Code M00.9

Pyogenic arthritis, unspecified

    2016 2017 2018 2019 2020 Billable/Specific Code
  • M00.9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2020 edition of ICD-10-CM M00.9 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of M00.9 - other international versions of ICD-10 M00.9 may differ.
Applicable To
  • Infective arthritis NOS
The following code(s) above M00.9 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to M00.9:
  • M00-M99
    2020 ICD-10-CM Range M00-M99

    Diseases of the musculoskeletal system and connective tissue

    Note
    • Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition
    Type 2 Excludes
    • 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)
    Diseases of the musculoskeletal system and connective tissue
  • M00-M02
    2020 ICD-10-CM Range M00-M02

    Infectious arthropathies

    Note
    • 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.
    Infectious arthropathies
Approximate Synonyms
  • Acute infective arthritis
  • Acute infective polyarthritis
  • Chronic infective arthritis
  • Infective arthritis
  • Infective arthritis of ankle
  • Infective arthritis of bilateral ankles
  • Infective arthritis of bilateral elbows
  • Infective arthritis of bilateral feet
  • Infective arthritis of bilateral hands
  • Infective arthritis of bilateral hips
  • Infective arthritis of bilateral knees
  • Infective arthritis of bilateral shoulders
  • Infective arthritis of bilateral wrists
  • Infective arthritis of elbow
  • Infective arthritis of foot
  • Infective arthritis of hip
  • Infective arthritis of knee
  • Infective arthritis of left ankle
  • Infective arthritis of left elbow
  • Infective arthritis of left foot
  • Infective arthritis of left hand
  • Infective arthritis of left hip
  • Infective arthritis of left knee
  • Infective arthritis of left shoulder
  • Infective arthritis of left wrist
  • Infective arthritis of right ankle
  • Infective arthritis of right elbow
  • Infective arthritis of right foot
  • Infective arthritis of right hand
  • Infective arthritis of right hip
  • Infective arthritis of right knee
  • Infective arthritis of right shoulder
  • Infective arthritis of right wrist
  • Infective polyarthritis
  • Pyogenic (septic) arthritis
  • Subacute infective arthritis
  • Subacute infective polyarthritis
  • Suppurative arthritis
Clinical Information
  • Arthritis caused by bacteria, rickettsiae, mycoplasmas, viruses, fungi, or parasites; bacterial arthritis is frequently caused by staphylococcus aureus, streptococcus pneumoniae, haemophilus influenzae, borrelia, and neisseria gonorrhoeae; viral arthritis is less common than bacterial arthritis and may be a manifestation of such viral diseases as mumps, rubella, hepatitis, etc.
  • Arthritis caused by bacteria; rickettsia; mycoplasma; viruses; fungi; or parasites.
  • 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. Besides the usual arthritis symptoms, it can cause chills and fever.one type of infectious arthritis is reactive arthritis. It is inflammation of a joint in reaction to an infection somewhere else in your body. The joint is usually the knee, ankle, or toe. The infection that causes reactive arthritis is often in the bladder, urethra (urine tube), or for women, in the vagina. Sexually transmitted or food-borne bacteria can cause reactive arthritis.to diagnose infectious arthritis, your health care provider may do tests of your blood, urine, and joint fluid. Treatment includes medicines and sometimes surgery.
ICD-10-CM M00.9 is grouped within Diagnostic Related Group(s) (MS-DRG v37.0):
  • 485 Knee procedures with pdx of infection with mcc
  • 486 Knee procedures with pdx of infection with cc
  • 487 Knee procedures with pdx of infection without cc/mcc
  • 548 Septic arthritis with mcc
  • 549 Septic arthritis with cc
  • 550 Septic arthritis without cc/mcc

Convert M00.9 to ICD-9-CM

Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change

Diagnosis Index entries containing back-references to M00.9:
  • Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic) L02.91
    ICD-10-CM Diagnosis Code L02.91

    Cutaneous abscess, unspecified

      2016 2017 2018 2019 2020 Billable/Specific Code
  • Arthritis, arthritic (acute) (chronic) (nonpyogenic) (subacute) M19.90
    ICD-10-CM Diagnosis Code M19.90

    Unspecified osteoarthritis, unspecified site

      2016 2017 2018 2019 2020 Billable/Specific Code
    Applicable To
    • Arthrosis NOS
    • Arthritis NOS
    • Osteoarthritis NOS
  • Disease, diseased - see also Syndrome
    • hip (joint) M25.9
      ICD-10-CM Diagnosis Code M25.9

      Joint disorder, unspecified

        2016 2017 2018 2019 2020 Billable/Specific Code
      • suppurative M00.9
  • Infection, infected, infective (opportunistic) B99.9
    ICD-10-CM Diagnosis Code B99.9

    Unspecified infectious disease

      2016 2017 2018 2019 2020 Billable/Specific Code
    • hip (joint) M00.9
    • joint NEC M00.9
    • knee (joint) M00.9
      • joint M00.9
    • shoulder (joint) M00.9
    • acromioclavicular M00.9
    • metatarsophalangeal M00.9

ICD-10-CM Codes Adjacent To M00.9
M00.86 Arthritis due to other bacteria, knee
M00.861 Arthritis due to other bacteria, right knee
M00.862 Arthritis due to other bacteria, left knee
M00.869 Arthritis due to other bacteria, unspecified knee
M00.87 Arthritis due to other bacteria, ankle and foot
M00.871 Arthritis due to other bacteria, right ankle and foot
M00.872 Arthritis due to other bacteria, left ankle and foot
M00.879 Arthritis due to other bacteria, unspecified ankle and foot
M00.88 Arthritis due to other bacteria, vertebrae
M00.89 Polyarthritis due to other bacteria
M00.9 Pyogenic arthritis, unspecified
M01 Direct infections of joint in infectious and parasitic diseases classified elsewhere
M01.X Direct infection of joint in infectious and parasitic diseases classified elsewhere
M01.X0 Direct infection of unspecified joint in infectious and parasitic diseases classified elsewhere
M01.X1 Direct infection of shoulder joint in infectious and parasitic diseases classified elsewhere
M01.X11 Direct infection of right shoulder in infectious and parasitic diseases classified elsewhere
M01.X12 Direct infection of left shoulder in infectious and parasitic diseases classified elsewhere
M01.X19 Direct infection of unspecified shoulder in infectious and parasitic diseases classified elsewhere
M01.X2 Direct infection of elbow in infectious and parasitic diseases classified elsewhere
M01.X21 Direct infection of right elbow in infectious and parasitic diseases classified elsewhere
M01.X22 Direct infection of left elbow in infectious and parasitic diseases classified elsewhere

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.