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A02.23 ICD-10-CM Code: Salmonella arthritis

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

Coding at a Glance

Official instructions
1 inclusion term
Risk adjustment
CMS-HCC V28: 1 category · CMS-HCC V22 category 39

What these terms mean →

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, and is marked with where it comes from.

Includesfrom A02What A02 covers
  • infection or foodborne intoxication due to any Salmonella species other than S. typhi and S. paratyphi

Where it sits Source: CMS/NCHS

Under:Chapter 1: Certain Infectious and Parasitic DiseasesA00-A09 Intestinal infectious diseasesA02 Other salmonella infectionsA02.2 Localized salmonella infections

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)
  • MS-DRG 974 — HIV WITH MAJOR RELATED CONDITION WITH MCC (MDC 25)
  • MS-DRG 975 — HIV WITH MAJOR RELATED CONDITION WITH CC (MDC 25)
  • MS-DRG 976 — HIV WITH MAJOR RELATED CONDITION WITHOUT CC/MCC (MDC 25)

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 A02.23 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 A02.23 itself; “inherited from” names the category or block whose note applies here.

Includes

Conditions the official ICD-10-CM tabular list includes under this code.

  • infection or foodborne intoxication due to any Salmonella species other than S. typhi and S. paratyphi

Source: inherited from A02

Don’t confuse A02.23 with…

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

The codes most likely to be picked instead of A02.23 — 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.

  • A02.20— 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 “Localized salmonella infection, unspecified” takes A02.20; specificity in the record moves it back here.

    Full comparison: A02.23 vs A02.20 →

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.

Coding context

Guidelines, coding notes, decision aids, relationships (with MS-DRG and CCSR classification), hierarchy, HCC, coverage and the context map: what a coder reaches for after the core. Each section names whether it is official source data, a MedCoder-derived relationship or MedCoder editorial.

Code Overview

Salmonella arthritis is a billable ICD-10-CM diagnosis code (A02.23).

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

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

Other codes that name A02.23 or its code family, from the CMS ICD-10-CM tabular instructional notes. Tabular-note edges are stored at the code family level that carries each note.

Referenced by 1 Excludes1 note: A05 — Other bacterial foodborne intoxications, not elsewhere classified (via A02.-).

These codes’ tabular lists mark this diagnosis as mutually exclusive — not reported together unless the conditions are documented as unrelated.

Referenced by 6 Excludes2 notes: P35 — Congenital viral diseases (via A02.-), P35-P39 — Infections specific to the perinatal period (P35-P39) (via A02.-), P36 — Bacterial sepsis of newborn (via A02.-), P37 — Other congenital infectious and parasitic diseases (via A02.-), P38 — Omphalitis of newborn (via A02.-), P39 — Other infections specific to the perinatal period (via A02.-).

These codes’ tabular lists name this diagnosis as distinct — both may be reported when both are documented.

Referenced by 1 Code First instruction: M49 — Spondylopathies in diseases classified elsewhere (via A02.-).

Each of these codes carries a Code First note naming this condition — when that code is reported, THIS code is sequenced first, ahead of it.

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 934 clinically related codes on its CMS exclusion list. Does not count toward severity when the stay groups to DRGs 974-976 (HIV with Major Related Condition).

Named in the grouper logic of 6 MS-DRGs: DRG 548 (MDC 08), DRG 549 (MDC 08), DRG 550 (MDC 08), DRG 974 (MDC 25), DRG 975 (MDC 25), DRG 976 (MDC 25).

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.

A01.04 — Typhoid arthritis, A01.05 — Typhoid osteomyelitis, A02.24 — Salmonella osteomyelitis, A39.83 — Meningococcal arthritis, A39.84 — Postmeningococcal arthritis, A50.55 — Late congenital syphilitic arthropathy, A54.40 — Gonococcal infection of musculoskeletal system, unspecified, A54.41 — Gonococcal spondylopathy, A54.42 — Gonococcal arthritis, A54.43 — Gonococcal osteomyelitis, A54.49 — Gonococcal infection of other musculoskeletal tissue, A66.6 — Bone and joint lesions of yaws, A69.23 — Arthritis due to Lyme disease, B06.82 — Rubella arthritis, B26.85 — Mumps arthritis, B42.82 — Sporotrichosis arthritis, M00.00 — Staphylococcal arthritis, unspecified joint, M00.011 — Staphylococcal arthritis, right shoulder, M00.012 — Staphylococcal arthritis, left shoulder, M00.019 — Staphylococcal arthritis, unspecified shoulder, +588 more

Same clinical category (CCSR)

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

A01.04 — Typhoid arthritis, A18.01 — Tuberculosis of spine, A18.02 — Tuberculous arthritis of other joints, A18.03 — Tuberculosis of other bones, A39.83 — Meningococcal arthritis, A54.42 — Gonococcal arthritis, A69.23 — Arthritis due to Lyme disease, B06.82 — Rubella arthritis, B26.85 — Mumps arthritis, B42.82 — Sporotrichosis arthritis, M00.00 — Staphylococcal arthritis, unspecified joint, M00.011 — Staphylococcal arthritis, right shoulder, M00.012 — Staphylococcal arthritis, left shoulder, M00.019 — Staphylococcal arthritis, unspecified shoulder, M00.021 — Staphylococcal arthritis, right elbow, M00.022 — Staphylococcal arthritis, left elbow, M00.029 — Staphylococcal arthritis, unspecified elbow, M00.031 — Staphylococcal arthritis, right wrist, M00.032 — Staphylococcal arthritis, left wrist, M00.039 — Staphylococcal arthritis, unspecified wrist, +411 more

Same Index main term, other category

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

A01.04 — Typhoid arthritis (in, typhoid fever), A01.4 — Paratyphoid fever, unspecified (in, paratyphoid fever), A05.0 — Foodborne staphylococcal intoxication (foodborne, due to, Staphylococcus), A05.1 — Botulism food poisoning (foodborne, classical), A05.2 — Foodborne Clostridium perfringens [Clostridium welchii] intoxication (foodborne, due to, Clostridium, welchii), A05.3 — Foodborne Vibrio parahaemolyticus intoxication (foodborne, due to, Vibrio, parahaemolyticus), A05.4 — Foodborne Bacillus cereus intoxication (foodborne, due to, Bacillus cereus), A05.5 — Foodborne Vibrio vulnificus intoxication (foodborne, due to, Vibrio, vulnificus), A05.8 — Other specified bacterial foodborne intoxications (foodborne, due to, bacterium, specified NEC), A05.9 — Bacterial foodborne intoxication, unspecified (foodborne), A08.8 — Other specified intestinal infections (in, enteritis, infectious NEC, specified organism NEC), A09 — Infectious gastroenteritis and colitis, unspecified (in, enteritis, infectious NEC), A18.01 — Tuberculosis of spine (spine, tuberculous), A18.02 — Tuberculous arthritis of other joints (tuberculous), A24.0 — Glanders (due to or associated with, glanders), A25.1 — Streptobacillosis (epidemic erythema), A30.9 — Leprosy, unspecified (in, leprosy), A31.8 — Other mycobacterial infections (due to or associated with, mycobacteria), A39.83 — Meningococcal arthritis (meningococcal), A39.84 — Postmeningococcal arthritis (postmeningococcal), +215 more

Lab tests where this diagnosis supports Medicare coverage (NCD)

Medicare's National Coverage Determination (NCD) program lists this diagnosis as medical justification for these lab tests.

Iron Panel, Partial Thromboplastin Time (PTT) Test, Prothrombin Time Test and INR (PT/INR)

Contextual Map

Every relationship of A02.23 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.

Run A02.23 with these 8 related codes in Claim Check

Hierarchy

Referenced by Excludes1 notes

Referenced by Excludes2 notes

Referenced by Code First instructions

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

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
  • MDC 25 — Human Immunodeficiency Virus Infections[MDC crossing]: “Human Immunodeficiency Virus Infections — 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.”— CMS MS-DRG Definitions Manual · FY2027

Index entries

  • Arthritis, arthritic (acute) (chronic) (nonpyogenic) (subacute), in (due to), Salmonella (arizonae) (cholerae-suis) (enteritidis) (typhimurium)[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2027
  • Infection, infected, infective (opportunistic), Salmonella (aertrycke) (arizonae) (cholerae-suis) (enteritidis) (gallinarum) (suipestifer) (typhimurium), localized, arthritis[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2027
  • Intoxication, foodborne, due to, Salmonella, with, localized infection (s), arthritis[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2027

Nearest codes (12)

Change history

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

Reference

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

Indexed Clinical Terms (3)

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.

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 28, 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. "A02.23 — Salmonella arthritis." ICD-10-CM FY2027. https://medcoder.ai/icd10/code/a02.23-salmonella-arthritis

Change history

  • FY2016 — October 1, 2015
    In the code set at ICD-10-CM adoption
    Salmonella arthritis

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 A02.23 in its code family, with their registry titles.

View all codes in the A02 family