ICD-10-CM diagnosis codes

Staphylococcal arthritis affecting a joint that has not been specified by site or laterality in the clinical documentation.

Staphylococcal joint infection localized to one or more vertebral articulations, classified under pyogenic (bacterial) arthropathy.

Staphylococcal pyogenic arthritis affecting multiple joints simultaneously, not limited to a single anatomical site.

M00.10 identifies pneumococcal arthritis affecting a joint that is not specified by name or anatomical site in the clinical documentation.

M00.18 identifies direct pyogenic infection of the vertebral joints caused by Streptococcus pneumoniae, classified under infectious arthropathies in the musculoskeletal chapter.

M00.19 identifies pneumococcal pyogenic arthritis involving multiple joints simultaneously, caused by Streptococcus pneumoniae infection, where no single dominant joint site can be specified.

M00.20 classifies septic joint infection caused by streptococcal species other than Streptococcus pneumoniae (Group A, B, C, G, or viridans group) when the affected joint is not documented or cannot be specified.

Pyogenic arthritis of the vertebrae caused by streptococcal species other than Streptococcus pneumoniae or Group A streptococcus — classified under the infectious arthropathies block of the musculoskeletal chapter.

Streptococcal joint infection involving multiple joints simultaneously, caused by streptococcal species other than group A (Streptococcus pyogenes) and group B (Streptococcus agalactiae), where no single joint site predominates.

Bacterial joint infection caused by organisms other than staphylococci, pneumococci, streptococci, or gram-negative bacteria, with the specific joint not documented or not determinable.

Bacterial arthritis (pyogenic) affecting the vertebral joints, caused by organisms other than staphylococci, streptococci, pneumococci, or gram-negative bacteria — the specific 'other bacteria' subcategory at the vertebral site.

Bacterial infection involving multiple joints simultaneously, caused by a pathogen other than staphylococcal, pneumococcal, streptococcal, or gonococcal organisms — classified under the pyogenic arthritis category.

M01.X0 identifies a direct infection of a joint — site unspecified — occurring as a manifestation of an underlying infectious or parasitic disease that is classified under a different ICD-10-CM code elsewhere in the system.

M01.X8 classifies direct bacterial, viral, fungal, or parasitic infection of the vertebrae where the underlying infectious or parasitic disease is coded elsewhere in ICD-10-CM.

M01.X9 identifies direct microbial invasion of multiple joints as a manifestation of an underlying infectious or parasitic disease that is coded and classified elsewhere in ICD-10-CM.

Reactive joint disease that develops as a consequence of intestinal bypass surgery, coded here when the specific joint site is not documented.

Reactive arthropathy of the vertebral joints occurring as a direct consequence of prior intestinal bypass surgery, classified under post-procedural arthropathies.

Joint disease affecting multiple anatomical sites as a direct consequence of intestinal bypass surgery, classified under postinfective and reactive arthropathies.

Postdysenteric arthropathy at an unspecified anatomical site — joint inflammation arising after a dysenteric illness when the specific joint involved is not documented.

Spinal joint inflammation arising as a reactive complication after a dysenteric (bacterial intestinal) infection, classified under postinfective and reactive arthropathies.

Reactive joint inflammation affecting multiple anatomical sites, occurring as a sequela of dysenteric gastrointestinal infection — classified under postinfective and reactive arthropathies.

M02.20 identifies arthropathy that develops as a consequence of vaccination when the affected joint site is not documented or not specified in the medical record.

Postimmunization arthropathy of the vertebrae — joint inflammation affecting the spine that arises as a reaction following vaccination.

M02.29 identifies postimmunization arthropathy affecting multiple joint sites simultaneously — a reactive joint condition that develops following vaccination rather than from direct pathogen invasion of the joint.

Reactive arthritis (Reiter's disease) without a documented or determinable joint site — used when the affected anatomical location is not specified in the clinical record.

Reiter's disease (reactive arthritis) with spinal involvement, classified under postinfective and reactive arthropathies, with the vertebrae as the documented site of arthropathy.

Reiter's disease (reactive arthritis) affecting multiple joint sites simultaneously, coded when two or more anatomically distinct joints are involved and no single-site code captures the full clinical picture.

M02.80 identifies reactive arthritis caused by an infection elsewhere in the body — falling outside the specific Reiter's disease or postdysenteric categories — when no joint site is documented or determinable.

Reactive arthritis affecting the vertebral joints, triggered by an infection elsewhere in the body — not a direct joint infection itself — and not classifiable under a more specific reactive arthropathy subtype within M02.

M02.89 identifies reactive arthropathy affecting multiple joint sites simultaneously, triggered by an infection elsewhere in the body rather than direct joint invasion by a pathogen.

Felty's syndrome coded at the unspecified-site level — rheumatoid arthritis with positive rheumatoid factor, splenomegaly, and granulocytopenia/neutropenia, where the affected joint site is not documented.

Felty's syndrome affecting multiple joint sites simultaneously — the triad of seropositive rheumatoid arthritis, splenomegaly, and granulocytopenia documented across more than one anatomical region.

Rheumatoid lung disease occurring in a patient with seropositive rheumatoid arthritis (RF-positive), where the specific joint site is not documented or identified.

Rheumatoid lung disease occurring concurrently with seropositive rheumatoid arthritis affecting multiple joint sites simultaneously, captured under a single billable code when bilateral or polyarticular involvement is present alongside pulmonary manifestation.

Rheumatoid vasculitis occurring alongside seropositive rheumatoid arthritis, coded without specification of which joint site is involved.

Rheumatoid vasculitis with seropositive rheumatoid arthritis affecting multiple joint sites simultaneously, representing a severe systemic complication where vascular inflammation is present alongside polyarticular disease.

Rheumatoid heart disease — encompassing rheumatoid carditis, endocarditis, myocarditis, and pericarditis — occurring in a patient with seropositive rheumatoid arthritis, where the joint site affected is not specified in the documentation.

Seropositive rheumatoid arthritis affecting the heart (carditis, endocarditis, myocarditis, or pericarditis) in a patient whose joint disease involves multiple anatomical sites simultaneously.

M05.40 captures rheumatoid myopathy occurring as a systemic manifestation of rheumatoid factor-positive rheumatoid arthritis when no specific joint site is documented.

Rheumatoid myopathy occurring as an extraarticular manifestation of seropositive rheumatoid arthritis, documented at multiple joint sites simultaneously.

Rheumatoid polyneuropathy occurring alongside rheumatoid arthritis, reported when the affected joint site is not specified in the clinical documentation.

Rheumatoid polyneuropathy with seropositive (rheumatoid factor–positive) rheumatoid arthritis affecting multiple joint sites simultaneously.

Rheumatoid arthritis with positive rheumatoid factor affecting an unspecified joint site, with documented involvement of other organs or body systems beyond the joints themselves.

Seropositive rheumatoid arthritis affecting multiple joint sites simultaneously, with documented involvement of one or more organs or body systems beyond the joints themselves.

Seropositive rheumatoid arthritis confirmed by positive rheumatoid factor, with no documented specific joint site and no evidence of extra-articular organ or systemic involvement.

Seropositive rheumatoid arthritis affecting multiple joints simultaneously, confirmed by positive rheumatoid factor, with no documented involvement of organs or organ systems beyond the musculoskeletal system.

Rheumatoid arthritis confirmed by positive rheumatoid factor, affecting a site not individually enumerated in the M05.7 subcategory, with no documented organ or systemic involvement.

Seropositive rheumatoid arthritis that does not fit the more specifically defined M05 subcategories, with the affected anatomical site undocumented or unspecified in the clinical record.

Rheumatoid arthritis confirmed by positive rheumatoid factor (RF) seropositivity, classified under the 'other' subcategory of M05.8, affecting multiple joint sites simultaneously rather than a single anatomic location.

Rheumatoid arthritis with a confirmed positive rheumatoid factor affecting a site not captured by the anatomically specific M05.8x subcodes — such as the temporomandibular joint, cricoarytenoid joint, or other atypical locations.

Seronegative rheumatoid arthritis where the affected joint site is not documented or cannot be specified — used when RF (rheumatoid factor) is negative or absent from lab results and no single anatomic site is identified.

Seronegative rheumatoid arthritis affecting the vertebral column, confirmed without detectable rheumatoid factor on laboratory testing.

Seronegative rheumatoid arthritis affecting three or more distinct joint regions simultaneously, with negative rheumatoid factor lab results documented in the medical record.

Seronegative rheumatoid arthritis affecting a joint or anatomical site that doesn't fit any of the named site subcategories under M06.0 — not shoulder, elbow, wrist, hand, hip, knee, ankle/foot, vertebrae, or multiple sites.

Rheumatoid bursitis at an unspecified anatomical site — bursal inflammation occurring in the context of rheumatoid disease where the treating provider has not documented or identified the specific joint location.

Rheumatoid bursitis affecting the vertebral region — bursal inflammation along the spine occurring in the context of rheumatoid disease.

Rheumatoid bursitis affecting two or more anatomically distinct joint sites simultaneously, classified under other rheumatoid arthritis (M06) when bursal inflammation is the primary manifestation across multiple regions.

Rheumatoid nodule at an unspecified anatomic site — a firm subcutaneous granulomatous lesion associated with rheumatoid arthritis when the treating provider has not documented or identified the specific body location.

M06.38 identifies a rheumatoid nodule located at the vertebrae, classified under other rheumatoid arthritis without rheumatoid factor involvement as the primary driver.

Rheumatoid nodule, multiple sites — subcutaneous or deep-tissue nodules associated with rheumatoid arthritis occurring at more than one anatomical location simultaneously.