Skip to main content

M00.89 ICD-10-CM Code: Polyarthritis due to other bacteria

Compare with another codeCheck this code on a claim

Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.

Coding at a Glance

Tabular directives
1 Excludes2 · 1 use-additional code
Risk adjustment
CMS-HCC V28: 1 category · CMS-HCC V22 category 39

Billable · FY2027A valid, specific ICD-10-CM code, reportable for dates of service in FY2027.

What you need to know

Source: CMS/NCHS Official ICD-10-CM tabular notes, quoted. From the CMS/NCHS tabular list for the release in force. A note the category or block publishes applies to this code too; the Instructions section marks which is which.

Use additional codeReport with this code when documented
  • code (B96) to identify bacteria
Excludes2Not included here; may be reported together
  • infection and inflammatory reaction due to internal joint prosthesis (T84.5-)

Most relevant related codes MedCoder-derived

Read off the official notes above and this code’s own position in the tabular list. Which to report is a documentation question; Compare shows the two side by side.

CompareCheck ClaimView Related Codes

Inpatient Payment Groups (MS-DRG)

Potential MS-DRG participation — not a DRG assignment.

MS-DRGs this diagnosis helps define, as principal or secondary, per the CMS ICD-10-CM/PCS MS-DRG Definitions Manual v44, Appendix B.

  • MS-DRG 548 — SEPTIC ARTHRITIS WITH MCC (MDC 08)
  • MS-DRG 549 — SEPTIC ARTHRITIS WITH CC (MDC 08)
  • MS-DRG 550 — SEPTIC ARTHRITIS WITHOUT CC/MCC (MDC 08)

A diagnosis appearing in a group's logic does not by itself determine the DRG assigned to a stay; the grouper uses the full claim.

Risk Adjustment (CMS-HCC)

Payment categories this diagnosis maps to under CMS-HCC V28, payment year 2026.

  • HCC 92 — Bone/Joint/Muscle/Severe Soft Tissue Infections/Necrosis

Other models: CMS-HCC V22 HCC 39

Risk scores depend on the enrollee's full accepted diagnosis set and segment; a category mapping alone does not determine payment.

Coding instructions

Official Tabular Instructional Notes: the inclusion, exclusion and sequencing notes published for M00.89 in the official ICD-10-CM tabular list, quoted as published.

Source: CMS/CDC — ICD-10-CM Tabular ListRelease: FY2027Effective: October 1, 2026

Trace:FY2027 changesChange historyRelease, file and checksum

Notes without a marker are published on M00.89 itself; “inherited from” names the category or block whose note applies here.

Excludes2 — Not Included Here

Conditions not covered by this code, but which may be reported alongside it when both are present.

Source: inherited from M00

Use Additional Code

Supplementary codes the tabular list directs you to add.

  • Use additional code (B96) to identify bacteria

Source: inherited from M00.8

Coder workflow for M00.89

MedCoder structured workflow — derived from this code’s own official record

Before you code M00.89

  1. M00.89’s title joins a condition with an associated condition or complication. Confirm each component is documented. Where the classification presumes the link through the “with” convention, only a provider statement that the conditions are unrelated defeats it. A combination code is assigned only when it fully identifies the documented conditions; a required second code for the stage, type or manifestation is still reported when the notes ask for it (Guidelines I.B.9, I.A.15).

    Guide: Combination codes →

Documentation check

The provider’s diagnostic statement
Codes are assigned from the provider’s documented diagnosis, not from clinical criteria, test values or a medication list (Guidelines I.A.19).
The associated condition or complication
Whether the associated condition the title names is documented; the “with” convention presumes some links, and a provider statement that the conditions are unrelated defeats it (Guidelines I.A.15).
The conditions the Use Additional Code note names
Reported with this code when documented; a conditional instruction (“if applicable”, “if known”) applies only when the record supports it.

Official instructions as workflow

  • Excludes2 — not part of M00.89(1 note)

    Coding workflow: The conditions named in this note are not included in M00.89. When the record documents both, both may be reported; the note is a boundary, not a prohibition.

    CompareT84.5

    See the official tabular notes · Guidelines I.A.12.b

  • Use Additional Code — after identifying M00.89(1 note)

    Coding workflow: Check whether the documentation supports the additional code(s) the note names, and report them with M00.89 when it does. Where the instruction is conditional (“if applicable”, “if known”), it applies only when the record documents the condition.

    ReviewB96

    See the official tabular notes · Guidelines I.A.13

Coding decision scenarios

Pattern scenarios for this code’s structure — decision rules, not clinical cases

Documentation: Only one of the components this code’s title joins is documented.

Coding question: Is M00.89 supported?

Path: Review the code for the documented component on its own.

Reason: A combination code is assigned only when it fully identifies the documented conditions; otherwise the documented component takes its own code (Guidelines I.B.9).

Documentation: A condition the Use Additional Code note names is documented.

Coding question: Is a second code reported with M00.89?

Path: Review the Use Additional Code note and the code it names.

Reason: The additional code is reported when the record documents the condition; a conditional instruction applies only when its condition is met (Guidelines I.A.13).

ReviewB96

Every row is derived from this code’s own record — its title, tabular notes, 7th-character family and same-category siblings — with fixed MedCoder wording; nothing is inferred about a patient. The official notes and guideline text are in the sections each row links to, and they control.

Coding context

The comparisons, hierarchy, index entries, guidelines, relationships, risk-adjustment and coverage context a coder commonly needs. Each section names whether it is official source data, a MedCoder-derived relationship or MedCoder editorial.

Don’t confuse M00.89 with…

MedCoder analysis — pairs from this code’s official notes, distinctions written by MedCoder

The codes most likely to be picked instead of M00.89 — named in its own official notes, or sharing its laterality or encounter family — with what separates them and which documentation moves the case. Each links to the full comparison.

  • M00.80— Specificity relationship (Review)

    Overlapping diagnoses in the same category.

    Overlapping codes in the same category — the documentation decides which is the more specific fit.

    What moves you there: A record that documents no more than “Arthritis due to other bacteria, unspecified joint” takes M00.80; specificity in the record moves it back here.

    Full comparison: M00.89 vs M00.80 →

  • T84.5— Excludes2 relationship (Informational)

    Distinct conditions — both may be reported.

    A distinct condition — both may be reported when both are documented.

    What moves you there: Documentation of infection and inflammatory reaction due to internal joint prosthesis adds T84.5; it is not part of this code and both may be reported when both are documented.

    Full comparison: M00.89 vs T84.5 →

Relationships are read from this code's own official notes, its laterality siblings and its encounter family; the wording of each distinction is MedCoder editorial, and the documentation named in each “what moves you there” line is the official note phrase or sibling title itself. Source: CMS ICD-10-CM tabular instructional notes; ICD-10-CM Official Guidelines, Section I.A.12.a.

Code Overview

Polyarthritis due to other bacteria is a billable ICD-10-CM diagnosis code (M00.89).

MedCoder summary Summary composed by MedCoder from this code's official ICD-10-CM record. The tabular instructional notes themselves appear verbatim below.

Indexed Clinical Terms (1)

Official source data — entries quoted as published, in the Index’s own lookup phrasing

Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code. These are alphabetic-index entries shown as the Index writes them — lookup phrasing, not necessarily the wording of a final diagnosis.

Verify Before Coding

  • CC as a secondary diagnosis (FY2027). Can raise the stay's MS-DRG severity tier.

From the code registry, the Medicare Code Editor, and the MS-DRG Definitions Manual. Check it against a full claim in Claim Check.

Relationships & Classification

MedCoder-derived relationships — computed from published CMS and AHRQ datasets

MS-DRG Grouper Relationships (FY2027)

Potential MS-DRG participation — not a DRG assignment.

FY2027 MS-DRG: CC — Complication or Comorbidity. Reported as a secondary diagnosis, this code raises the stay's MS-DRG severity tier — except when the principal diagnosis is one of 938 clinically related codes on its CMS exclusion list.

Named in the grouper logic of 3 MS-DRGs: DRG 548 (MDC 08), DRG 549 (MDC 08), DRG 550 (MDC 08).

From the CMS MS-DRG Definitions Manual (Appendices B and C). Actual DRG assignment depends on the complete claim.

Clinical classification (AHRQ CCSR):MUS001 — Infective arthritis (default); INF003 — Bacterial infections.

Clinical Classifications Software Refined (CCSR) for ICD-10-CM Diagnoses. Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality.

Related Codes

Same CMS-HCC risk category (V28)

CMS maps these diagnoses to the same Hierarchical Condition Category (Bone/Joint/Muscle/Severe Soft Tissue Infections/Necrosis) for risk-adjusted payment.

M00.851 — Arthritis due to other bacteria, right hip, M00.852 — Arthritis due to other bacteria, left hip, M00.859 — Arthritis due to other bacteria, unspecified hip, 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, M00.871 — 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, M00.9 — Pyogenic arthritis, unspecified, M01.X0 — Direct infection of unspecified 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.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, M01.X29 — Direct infection of unspecified elbow in infectious and parasitic diseases classified elsewhere, M01.X31 — Direct infection of right wrist in infectious and parasitic diseases classified elsewhere, M01.X32 — Direct infection of left wrist in infectious and parasitic diseases classified elsewhere, +588 more

Same clinical category (CCSR)

AHRQ's Clinical Classifications Software groups these diagnoses under the same clinical categories (Infective arthritis, Bacterial infections).

M00.851 — Arthritis due to other bacteria, right hip, M00.852 — Arthritis due to other bacteria, left hip, M00.859 — Arthritis due to other bacteria, unspecified hip, 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, M00.871 — 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, M00.9 — Pyogenic arthritis, unspecified, M01.X0 — Direct infection of unspecified 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.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, M01.X29 — Direct infection of unspecified elbow in infectious and parasitic diseases classified elsewhere, M01.X31 — Direct infection of right wrist in infectious and parasitic diseases classified elsewhere, M01.X32 — Direct infection of left wrist in infectious and parasitic diseases classified elsewhere, +411 more

Same Index main term, other category

The ICD-10-CM Index to Diseases and Injuries files this code under the main term “Arthritis, arthritic”; these codes share that main term but sit in a different category of the Tabular List.

E85.4 — Organ-limited amyloidosis (in, amyloidosis), E88.9 — Metabolic disorder, unspecified (in, metabolic disorder NEC), G95.0 — Syringomyelia and syringobulbia (in, syringomyelia), G98.0 — Neurogenic arthritis, not elsewhere classified (in, neurological disorder NEC), J98.9 — Respiratory disorder, unspecified (in, respiratory disorder NEC), L40.50 — Arthropathic psoriasis, unspecified (psoriatic), L40.52 — Psoriatic arthritis mutilans (mutilans), L40.54 — Psoriatic juvenile arthropathy (juvenile, psoriatic), L51.9 — Erythema multiforme, unspecified (in, erythema, multiforme), L52 — Erythema nodosum (in, erythema, nodosum), M04.1 — Periodic fever syndromes (in, Mediterranean fever, familial), M05.70 — Rheumatoid arthritis with rheumatoid factor of unspecified site without organ or systems involvement (rheumatoid, seropositive, without organ involvement), M05.71 — Rheumatoid arthritis with rheumatoid factor of shoulder without organ or systems involvement (rheumatoid, seropositive, without organ involvement, shoulder), M05.72 — Rheumatoid arthritis with rheumatoid factor of elbow without organ or systems involvement (rheumatoid, seropositive, without organ involvement, elbow), M05.73 — Rheumatoid arthritis with rheumatoid factor of wrist without organ or systems involvement (rheumatoid, seropositive, without organ involvement, wrist), M05.74 — Rheumatoid arthritis with rheumatoid factor of hand without organ or systems involvement (rheumatoid, seropositive, without organ involvement, hand joint), M05.75 — Rheumatoid arthritis with rheumatoid factor of hip without organ or systems involvement (rheumatoid, seropositive, without organ involvement, hip), M05.76 — Rheumatoid arthritis with rheumatoid factor of knee without organ or systems involvement (rheumatoid, seropositive, without organ involvement, knee), M05.77 — Rheumatoid arthritis with rheumatoid factor of ankle and foot without organ or systems involvement (rheumatoid, seropositive, without organ involvement, ankle), M05.79 — Rheumatoid arthritis with rheumatoid factor of multiple sites without organ or systems involvement (rheumatoid, seropositive, without organ involvement, multiple sites), +153 more

Contextual Map

Every relationship of M00.89 in one view: hierarchy, official tabular instructions in both directions, clinical classification, risk adjustment, MS-DRG participation, index terms and change history — each edge carrying the CMS source it derives from.

Hierarchy

Clinical classification (CCSR)

Risk adjustment (CMS-HCC)

  • HCC 92 — Bone/Joint/Muscle/Severe Soft Tissue Infections/Necrosis [CMS-HCC]— CMS-HCC V28 · 2026

MS-DRG Grouper

  • CC — Complication or Comorbidity [MS-DRG severity]: “As a secondary diagnosis this code can raise the stay's MS-DRG severity tier (CC).”— CMS MS-DRG Definitions Manual (Appendix C) · FY2027
  • DRG 548 — SEPTIC ARTHRITIS WITH MCC[MS-DRG]: “SEPTIC ARTHRITIS WITH MCC (MDC 08)”— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
  • DRG 549 — SEPTIC ARTHRITIS WITH CC[MS-DRG]: “SEPTIC ARTHRITIS WITH CC (MDC 08)”— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
  • DRG 550 — SEPTIC ARTHRITIS WITHOUT CC/MCC[MS-DRG]: “SEPTIC ARTHRITIS WITHOUT CC/MCC (MDC 08)”— CMS MS-DRG Definitions Manual (Appendix B) · FY2027

MDC crossing

  • MDC 08 — Diseases and Disorders of the Musculoskeletal System and Connective Tissue[MDC crossing]: “Diseases and Disorders of the Musculoskeletal System and Connective Tissue — the grouper's crossing between diagnoses and procedures: a principal diagnosis sets the MDC, and same-MDC procedures move the stay to its surgical DRGs. 18,439 same-MDC procedures group here; browse them on the MDC page.”— CMS MS-DRG Definitions Manual · FY2027

Index entries

  • Arthritis, arthritic (acute) (chronic) (nonpyogenic) (subacute), pyogenic or pyemic (any site except spine), bacterial NEC, multiple site[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2027

Nearest codes (40)

Change history

  • FY2016 — In the code set at ICD-10-CM adoption [Change history]— CMS release files (code change ledger) · icd10cm-fy2016

Deep reference

Published questions and FAQ, every source behind this page with its release and checksum, the date-of-service check and the complete change history.

Sources for this page

Codes, titles, notes, index terms and mappings on this page are transcribed from the datasets below. Relationships MedCoder computed and text MedCoder wrote are labelled where they appear.

Code, title, tabular notes and index terms Official source data
CMS/CDC ICD-10-CM FY2027 tabular list, index and tables, effective October 1, 2026 Release, file and checksum · Publisher’s page
Claim edits Official source data
CMS Definitions of Medicare Code Edits — v44.0 (October 2026) Release, file and checksum · Publisher’s page
Inpatient payment groups Official source data
CMS MS-DRG Definitions Manual (incl. Appendix B diagnosis index, Appendix C CC/MCC list, Appendix E procedure index) and IPPS Final Rule tables — v44 Release, file and checksum · Publisher’s page
Risk adjustment Official source data
2026 Mid-Year Final ICD-10 Mappings + Model Software (cms.gov/files/zip/2026-midyear-final-icd-10-mappings.zip, 2026-midyear-final-model-software.zip) — CMS-HCC V28, PY2026 mid-year final release Release, file and checksum · Publisher’s page
Change history and date-of-service validity Official source data
CMS ICD-10-CM release addenda, ingested release by release into the change ledger Release, file and checksum · Publisher’s page
Comparisons, relationships and the contextual map MedCoder-derived relationship
Computed by MedCoder from the tabular notes and tables above; every derived relationship is marked as derived where it appears
Summary and FAQ answers MedCoder editorial explanation
Written by MedCoder to explain the sources above: drafted with AI assistance, checked by a person against the release files, and labelled as MedCoder text where it appears. Not official text.

Current data releases:ICD-10-CM FY2027 · ICD-10-PCS FY2027 · HCPCS October 2026 · MS-DRG v44 · Medicare Code Editor v44.0 · NCCI PTP Q4 2026 · MUE Q4 2026 · NCD code lists 2026-01 · LCD export September 20, 2026 · All releases and sources

Labels on this page: Official source data · MedCoder-derived relationship · MedCoder editorial explanation. How to read the labels · All data sources and release dates · CMS coding rules

Cite this page

Reference this page in a research guide, syllabus or article. The release is included because code content changes each year.

MedCoder.ai. "M00.89 — Polyarthritis due to other bacteria." ICD-10-CM FY2027. https://medcoder.ai/icd10/code/m00.89-polyarthritis-due-to-other-bacteria

Change history

  • FY2016 — October 1, 2015
    In the code set at ICD-10-CM adoption
    Polyarthritis due to other bacteria

No changes since FY2016 — additions, deletions, description changes and billable-status changes are tracked through FY2027, and none are recorded for this code. Note changes are tracked from FY2027 only.

Nearest Codes in This Family

Official ICD-10-CM classifications closest to M00.89 in its code family, with their registry titles.

View all codes in the M00 family