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M02.341 ICD-10-CM Code: Reiter's disease, right hand

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

Coding at a Glance

Tabular directives
8 Excludes1 · 5 code-first instructions
Risk adjustment
CMS-HCC V28: 1 category · CMS-HCC V22 category 40 · RxHCC V08 category 83

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 v43, Appendix B.

  • MS-DRG 545 — CONNECTIVE TISSUE DISORDERS WITH MCC (MDC 08)
  • MS-DRG 546 — CONNECTIVE TISSUE DISORDERS WITH CC (MDC 08)
  • MS-DRG 547 — CONNECTIVE TISSUE DISORDERS 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 94 — Systemic Lupus Erythematosus and Other Specified Systemic Connective Tissue Disorders

Other models: CMS-HCC V22 HCC 40 · RxHCC V08 HCC 83

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 M02.341 in the official ICD-10-CM tabular list, quoted as published.

Source: CMS/CDC — ICD-10-CM Tabular ListRelease: FY2026Effective: October 1, 2025

Notes without a marker are published on M02.341 itself; “inherited from” names the category or block whose note applies here.

Excludes1 — Not Coded Here

Conditions generally not reported together with this code (Excludes1) -- an error unless the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).

Code First

Underlying conditions that must be sequenced before this code.

  • underlying disease, such as:
  • congenital syphilis Clutton's joints
  • enteritis due to Yersinia enterocolitica (A04.6) inherited from M02
  • infective endocarditis (I33.0) inherited from M02
  • viral hepatitis (B15-B19) inherited from M02

Coder workflow for M02.341

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

Before you code M02.341

  1. Laterality is coded in this family. Confirm the side documented — right, left, or bilateral — and select the matching code (this page’s code: right). The unspecified-side code applies only when the record states no side. Laterality is assigned from the documented side; where a bilateral code exists and both sides are documented, it is used instead of two unilateral codes (Guidelines I.B.13).

    ReviewM02.342 · left, M02.349 · unspecified

    Guide: Laterality coding →

  2. Check the Excludes1 note: if the documentation supports a condition named there, do not simply proceed with M02.341. Excludes1 conditions are not reported together with this code unless the record shows they are unrelated (Guidelines I.A.12.a).

    See the official tabular notes

Choose the right path

  1. Does the documentation support a condition named in M02.341’s Excludes1 note?
    Yes → Do not simply proceed: review the excluded code. Both are reported only when the record shows the two conditions are unrelated.
    No → Continue.

    ReviewM35.2, M01, A39.84, B26.85, B06.82, A52.77

  2. Is the underlying (etiologic) condition the Code First note names documented?
    Yes → Sequence the underlying condition first, then M02.341.
    No → Continue; do not add an underlying condition the record does not document.

    ReviewA04.6, I33.0

  3. Is the side documented?
    Yes → Select the code for the documented side (or the bilateral code when both sides are documented and one exists).
    No → Use the unspecified-side code only when the record states no side; a query is the alternative.

    ReviewM02.342 · left, M02.349 · unspecified

Consider M02.341. Then confirm the code is valid for the date of service in the Verify section.

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).
Laterality
Right, left or bilateral as documented; unspecified only when the record states no side (Guidelines I.B.13).
The underlying (etiologic) condition
Named in the Code First note; sequenced before this code when documented (Guidelines I.A.13).

Official instructions as workflow

  • Excludes1 — check before selecting M02.341(8 notes)

    Coding workflow: If the documentation supports a condition named in this note, do not simply proceed with M02.341: the two are not reported together. The one exception is when the record shows the two conditions are unrelated to each other.

    CompareM35.2, M01, A39.84, B26.85, B06.82, A52.77

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

  • Code First — sequencing check(5 notes)

    Coding workflow: Check whether the underlying or etiologic condition the note names is documented. When it is, sequence it before M02.341. Do not add an underlying condition the record does not document.

    ReviewA04.6, I33.0

    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: Both the condition M02.341 describes and a condition named in its Excludes1 note are documented for the same encounter.

Coding question: Can both codes be reported?

Path: Review the Excludes1 note and the excluded code, and look for a provider statement on whether the two conditions are related.

Reason: Excludes1 means the two are not coded together; the exception is when the record shows the conditions are unrelated to each other (Guidelines I.A.12.a).

ReviewM35.2, M01, A39.84, B26.85, B06.82, A52.77

Documentation: The record documents the condition on one side only.

Coding question: Which code in this family applies?

Path: Select the sibling code for the documented side.

Reason: Laterality is assigned from the documented side; the unspecified-side code is for records that state no side (Guidelines I.B.13).

ReviewM02.342 · left, M02.349 · unspecified

Documentation: The underlying condition the Code First note names is documented alongside this condition.

Coding question: How are the two sequenced?

Path: Review the Code First note.

Reason: The underlying condition is sequenced first and the manifestation follows (Guidelines I.A.13).

ReviewA04.6, I33.0

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.

Code Overview

Reiter's disease, right hand is a billable ICD-10-CM diagnosis code (M02.341).

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

Decision Points

The directives on this code's own record, as a pre-claim checklist.

  1. Laterality is coded in this family. Confirm the documented side matches the code — the opposite-side siblings are in the relationships section. See the opposite-side sibling codes
  2. Sequencing: 5 Code First instructions — the underlying condition is sequenced before this code when present. See the Code First notes
  3. 8 Excludes1 entries — codes named there are generally not reported together with this code (Guidelines I.A.12.a). See the Excludes1 notes

Checklist rows are derived from this code's own official directives; the wording of each check is MedCoder editorial. The official notes themselves are in the sections each row links to.

Verify Before Coding

  • CC as a secondary diagnosis (FY2026). 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 structured relationships — computed from published CMS and AHRQ datasets

Other codes that name M02.341 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 17 Excludes1 notes across 2 chapters: A50 — Congenital syphilis (via M02.3.-), A50-A64 — Infections with a predominantly sexual mode of transmission (A50-A64) (via M02.3.-), A51 — Early syphilis (via M02.3.-), A52 — Late syphilis (via M02.3.-), A53 — Other and unspecified syphilis (via M02.3.-), A54 — Gonococcal infection (via M02.3.-), A55 — Chlamydial lymphogranuloma (venereum) (via M02.3.-), A56 — Other sexually transmitted chlamydial diseases (via M02.3.-), A57 — Chancroid (via M02.3.-), A58 — Granuloma inguinale (via M02.3.-), A59 — Trichomoniasis (via M02.3.-), A60 — Anogenital herpesviral [herpes simplex] infections (via M02.3.-), A63 — Other predominantly sexually transmitted diseases, not elsewhere classified (via M02.3.-), A64 — Unspecified sexually transmitted disease (via M02.3.-), A74 — Other diseases caused by chlamydiae (via M02.3.-), M01 — Direct infections of joint in infectious and parasitic diseases classified elsewhere (via M02.-), M45 — Ankylosing spondylitis (via M02.3.-).

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

Referenced by 1 Excludes2 note: N34 — Urethritis and urethral syndrome (via M02.3.-).

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

Referenced by 1 Code First instruction: L86 — Keratoderma in diseases classified elsewhere (via M02.3.-).

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 (FY2026)

Potential MS-DRG participation — not a DRG assignment.

FY2026 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 943 clinically related codes on its CMS exclusion list.

Named in the grouper logic of 3 MS-DRGs: DRG 545 (MDC 08), DRG 546 (MDC 08), DRG 547 (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):MUS008 — Immune-mediated/reactive arthropathies (default).

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 condition, opposite side

Same category and title, differing only in which side of the body is affected.

M02.342 — Reiter's disease, left hand (left)Compare M02.341 vs M02.342 →, M02.349 — Reiter's disease, unspecified hand (unspecified)Compare M02.341 vs M02.349 →

Same CMS-HCC risk category (V28)

CMS maps these diagnoses to the same Hierarchical Condition Category (Systemic Lupus Erythematosus and Other Specified Systemic Connective Tissue Disorders) for risk-adjusted payment.

M02.30 — Reiter's disease, unspecified site, M02.311 — Reiter's disease, right shoulder, M02.312 — Reiter's disease, left shoulder, M02.319 — Reiter's disease, unspecified shoulder, M02.321 — Reiter's disease, right elbow, M02.322 — Reiter's disease, left elbow, M02.329 — Reiter's disease, unspecified elbow, M02.331 — Reiter's disease, right wrist, M02.332 — Reiter's disease, left wrist, M02.339 — Reiter's disease, unspecified wrist, M02.342 — Reiter's disease, left hand, M02.349 — Reiter's disease, unspecified hand, M02.351 — Reiter's disease, right hip, M02.352 — Reiter's disease, left hip, M02.359 — Reiter's disease, unspecified hip, M02.361 — Reiter's disease, right knee, M02.362 — Reiter's disease, left knee, M02.369 — Reiter's disease, unspecified knee, M02.371 — Reiter's disease, right ankle and foot, M02.372 — Reiter's disease, left ankle and foot, +50 more

Related risk categories

These categories interact through CMS's HCC hierarchy — one can suppress the other's risk-adjustment weight when both are present on a claim.

Rheumatoid Arthritis and Other Specified Inflammatory Rheumatic Disorders

Same clinical category (CCSR)

AHRQ's Clinical Classifications Software groups these diagnoses under the same clinical category (Immune-mediated/reactive arthropathies).

M02.30 — Reiter's disease, unspecified site, M02.311 — Reiter's disease, right shoulder, M02.312 — Reiter's disease, left shoulder, M02.319 — Reiter's disease, unspecified shoulder, M02.321 — Reiter's disease, right elbow, M02.322 — Reiter's disease, left elbow, M02.329 — Reiter's disease, unspecified elbow, M02.331 — Reiter's disease, right wrist, M02.332 — Reiter's disease, left wrist, M02.339 — Reiter's disease, unspecified wrist, M02.342 — Reiter's disease, left hand, M02.349 — Reiter's disease, unspecified hand, M02.351 — Reiter's disease, right hip, M02.352 — Reiter's disease, left hip, M02.359 — Reiter's disease, unspecified hip, M02.361 — Reiter's disease, right knee, M02.362 — Reiter's disease, left knee, M02.369 — Reiter's disease, unspecified knee, M02.371 — Reiter's disease, right ankle and foot, M02.372 — Reiter's disease, left ankle and foot, +77 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.

HIV Screening Test

Contextual Map

Every relationship of M02.341 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 M02.341 with these 10 related codes in Claim Check

Hierarchy

Referenced by Excludes1 notes (17)

Referenced by Excludes2 notes

Referenced by Code First instructions

Clinical classification (CCSR)

Risk adjustment (CMS-HCC)

  • HCC 94 — Systemic Lupus Erythematosus and Other Specified Systemic Connective Tissue Disorders [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. 18,508 same-MDC procedures group here; browse them on the MDC page.”— CMS MS-DRG Definitions Manual · FY2026

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

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 FY2026 tabular list, index and tables, effective October 1, 2025 Release, file and checksum · Publisher’s page
Claim edits Official source data
CMS Definitions of Medicare Code Edits — v43.1 (April 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 — v43 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 structured 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 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.

Labels on this page: Official source data · MedCoder structured relationship · MedCoder explanation. How to read the labels · All data sources and release dates

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. "M02.341 — Reiter's disease, right hand." ICD-10-CM FY2026. https://medcoder.ai/icd10/code/m02.341-reiters-disease-right-hand

Change history

  • FY2016 — October 1, 2015
    In the code set at ICD-10-CM adoption
    Reiter's disease, right hand

No changes since FY2016 — additions, deletions, description changes and billable-status changes are tracked through FY2027 (effective October 1, 2026), 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 M02.341 in its code family, with their registry titles.

View all codes in the M02 family