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M86.8X4 ICD-10-CM Code: Other osteomyelitis, hand

Compare with another code for M86.8X4Check this code on a claim

Billing Status: NO. This is a non-billable ICD-10-CM code: report a more specific billable code beneath it.

Coding at a Glance

Official instructions
5 Excludes1 · 4 Excludes2 · 2 use-additional instructions
Risk adjustment
CMS-HCC V28: 1 category · CMS-HCC V22 category 39

What these terms mean →

Not billable · FY2027A non-billable heading in the tabular list: report a more specific code beneath it.

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.

Use additional codefrom M86Report with this code when documented
  • Use additional code (B95-B97) to identify infectious agent
  • Use additional code to identify major osseous defect, if applicable (M89.7-)
Excludes1Not reported with this code unless documented as unrelated
  • osteomyelitis due to: (from M86)
  • echinococcus (B67.2) (from M86)
  • gonococcus (A54.43) (from M86)
  • salmonella (A02.24) (from M86)

+1 more in Instructions

Excludes2from M86Not included here; may be reported together

Where it sits Source: CMS/NCHS

Under:Chapter 13: Diseases of the Musculoskeletal System and Connective TissueM80-M94 Osteopathies and chondropathiesM86-M90 Other osteopathiesM86 OsteomyelitisM86.8 Other osteomyelitisM86.8X Other osteomyelitis

Codes under M86.8X4 (3)

  • M86.8X41Other osteomyelitis, right handBillable
  • M86.8X42Other osteomyelitis, left handBillable
  • M86.8X49Other osteomyelitis, unspecified handBillable

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

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 M86.8X4 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 M86.8X4 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).

Excludes2 — Not Included Here

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

Source: inherited from M86

Use Additional Code

Supplementary codes the tabular list directs you to add.

  • Use additional code (B95-B97) to identify infectious agent
  • Use additional code to identify major osseous defect, if applicable (M89.7-)

Source: inherited from M86

Coder workflow for M86.8X4

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

Before you code M86.8X4

  1. M86.8X4 is not reportable as written. Select the more specific code beneath it that the documentation supports. Codes are reported to the highest level of specificity the classification provides (Guidelines I.B.2).

    ReviewM86.8X41, M86.8X42, M86.8X49

    See the relationships section · Guide: How to choose an ICD-10-CM code →

  2. Check the Excludes1 note: if the documentation supports a condition named there, do not simply proceed with the code beneath M86.8X4. 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 one of the more specific codes beneath M86.8X4?
    Yes → Select that code and continue the checks below on its own page.
    No → M86.8X4 cannot be reported as written. Where the codes beneath it include an unspecified code, that code applies when the record goes no further; otherwise query for the missing detail.

    ReviewM86.8X41, M86.8X42, M86.8X49

  2. Does the documentation support a condition named in M86.8X4’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.

    ReviewB67.2, A54.43, A02.24, M96

Report the code beneath M86.8X4 that the documentation supports, not M86.8X4 itself. Then work the Use Additional Code note, and confirm that code is valid for the date of service on its own page.

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 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.
Any detail beyond this code’s title
What the record states that a more specific code would capture — or its absence, which itself supports the unspecified code.

Official instructions as workflow

  • Excludes1 — check before selecting M86.8X4(5 notes)

    Coding workflow: If the documentation supports a condition named in this note, do not simply proceed with M86.8X4: the two are not reported together. The one exception is when the record shows the two conditions are unrelated to each other.

    CompareB67.2, A54.43, A02.24, M96

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

  • Excludes2 — not part of M86.8X4(4 notes)

    Coding workflow: The conditions named in this note are not included in M86.8X4. When the record documents both, both may be reported; the note is a boundary, not a prohibition.

    CompareH05.0, H70.2, M46.2

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

  • Use Additional Code — after identifying M86.8X4(2 notes)

    Coding workflow: Check whether the documentation supports the additional code(s) the note names, and report them with M86.8X4 when it does. Where the instruction is conditional (“if applicable”, “if known”), it applies only when the record documents the condition.

    ReviewM89.7

    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 M86.8X4 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).

ReviewB67.2, A54.43, A02.24, M96

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

Coding question: Is a second code reported with the code beneath M86.8X4?

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).

ReviewM89.7

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.

Don’t confuse M86.8X4 with…

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

The codes most likely to be picked instead of M86.8X4 — 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.

  • B67.2— Excludes1 conflict (Excludes1 — generally not reported together)

    Not coded here — the tabular list excludes this pair for the same encounter.

    Not reported together with this code, except where the two conditions are documented as unrelated.

    What moves you there: Documentation of echinococcus moves the case to B67.2; the two are not reported together unless documented as unrelated.

    Full comparison: M86.8X4 vs B67.2 →

  • A54.43— Excludes1 conflict (Excludes1 — generally not reported together)

    Not coded here — the tabular list excludes this pair for the same encounter.

    Not reported together with this code, except where the two conditions are documented as unrelated.

    What moves you there: Documentation of gonococcus moves the case to A54.43; the two are not reported together unless documented as unrelated.

    Full comparison: M86.8X4 vs A54.43 →

  • A02.24— Excludes1 conflict (Excludes1 — generally not reported together)

    Not coded here — the tabular list excludes this pair for the same encounter.

    Not reported together with this code, except where the two conditions are documented as unrelated.

    What moves you there: Documentation of salmonella moves the case to A02.24; the two are not reported together unless documented as unrelated.

    Full comparison: M86.8X4 vs A02.24 →

  • M96— Excludes1 conflict (Excludes1 — generally not reported together)

    Not coded here — the tabular list excludes this pair for the same encounter.

    Not reported together with this code, except where the two conditions are documented as unrelated.

    What moves you there: Documentation of postprocedural osteopathies moves the case to M96; the two are not reported together unless documented as unrelated.

    Full comparison: M86.8X4 vs M96 →

  • H05.0— 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 orbit adds H05.0; it is not part of this code and both may be reported when both are documented.

    Full comparison: M86.8X4 vs H05.0 →

  • H70.2— 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 petrous bone adds H70.2; it is not part of this code and both may be reported when both are documented.

    Full comparison: M86.8X4 vs H70.2 →

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

Other osteomyelitis, hand is a billable ICD-10-CM diagnosis code (M86.8X4).

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. 2 Use Additional Code instructions — report the named additional code(s) when the documentation supports them. See the Use Additional Code notes
  2. 5 Excludes1 entries — codes named there are generally not reported together with this code (Guidelines I.A.12.a). See the Excludes1 notes
  3. 4 Excludes2 entries — those conditions are not part of this code and may be reported additionally when documented. See the Excludes2 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

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 M86.8X4 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 Code First instruction: M89.7 — Major osseous defect (via M86.-).

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.

Clinical classification (AHRQ CCSR):MUS002 — Osteomyelitis (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 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.

M86.669 — Other chronic osteomyelitis, unspecified tibia and fibula, M86.671 — Other chronic osteomyelitis, right ankle and foot, M86.672 — Other chronic osteomyelitis, left ankle and foot, M86.679 — Other chronic osteomyelitis, unspecified ankle and foot, M86.68 — Other chronic osteomyelitis, other site, M86.69 — Other chronic osteomyelitis, multiple sites, M86.8X0 — Other osteomyelitis, multiple sites, M86.8X1 — Other osteomyelitis, shoulder, M86.8X2 — Other osteomyelitis, upper arm, M86.8X3 — Other osteomyelitis, forearm, M86.8X5 — Other osteomyelitis, thigh, M86.8X6 — Other osteomyelitis, lower leg, M86.8X7 — Other osteomyelitis, ankle and foot, M86.8X8 — Other osteomyelitis, other site, M86.8X9 — Other osteomyelitis, unspecified sites, M86.9 — Osteomyelitis, unspecified, M87.00 — Idiopathic aseptic necrosis of unspecified bone, M87.011 — Idiopathic aseptic necrosis of right shoulder, M87.012 — Idiopathic aseptic necrosis of left shoulder, M87.019 — Idiopathic aseptic necrosis of unspecified shoulder, +588 more

Same clinical category (CCSR)

AHRQ's Clinical Classifications Software groups these diagnoses under the same clinical category (Osteomyelitis).

M86.652 — Other chronic osteomyelitis, left thigh, M86.659 — Other chronic osteomyelitis, unspecified thigh, M86.661 — Other chronic osteomyelitis, right tibia and fibula, M86.662 — Other chronic osteomyelitis, left tibia and fibula, M86.669 — Other chronic osteomyelitis, unspecified tibia and fibula, M86.671 — Other chronic osteomyelitis, right ankle and foot, M86.672 — Other chronic osteomyelitis, left ankle and foot, M86.679 — Other chronic osteomyelitis, unspecified ankle and foot, M86.68 — Other chronic osteomyelitis, other site, M86.69 — Other chronic osteomyelitis, multiple sites, M86.8X0 — Other osteomyelitis, multiple sites, M86.8X1 — Other osteomyelitis, shoulder, M86.8X2 — Other osteomyelitis, upper arm, M86.8X3 — Other osteomyelitis, forearm, M86.8X5 — Other osteomyelitis, thigh, M86.8X6 — Other osteomyelitis, lower leg, M86.8X7 — Other osteomyelitis, ankle and foot, M86.8X8 — Other osteomyelitis, other site, M86.8X9 — Other osteomyelitis, unspecified sites, M86.9 — Osteomyelitis, unspecified, +174 more

Same Index main term, other category

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

M71.01 — Abscess of bursa, shoulder (bursa, shoulder), M71.02 — Abscess of bursa, elbow (bursa, elbow), M71.03 — Abscess of bursa, wrist (bursa, wrist), M71.04 — Abscess of bursa, hand (bursa, hand), M71.05 — Abscess of bursa, hip (bursa, hip), M71.06 — Abscess of bursa, knee (bursa, knee), M71.07 — Abscess of bursa, ankle and foot (bursa, foot), M71.08 — Abscess of bursa, other site (bursa, specified site NEC), M71.09 — Abscess of bursa, multiple sites (bursa, multiple sites), M72.8 — Other fibroblastic disorders (fascia), N13.6 — Pyonephrosis (kidney, with calculus, with hydronephrosis), N15.1 — Renal and perinephric abscess (kidney), N20.0 — Calculus of kidney (kidney, with calculus), N28.89 — Other specified disorders of kidney and ureter (periureteral), N34.0 — Urethral abscess (lacunar), N41.2 — Abscess of prostate (prostate), N45.4 — Abscess of epididymis or testis (testis), N48.21 — Abscess of corpus cavernosum and penis (penis), N49.0 — Inflammatory disorders of seminal vesicle (seminal vesicle), N49.1 — Inflammatory disorders of spermatic cord, tunica vaginalis and vas deferens (vas deferens), +173 more

Contextual Map

Every relationship of M86.8X4 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 M86.8X4 with this related code in Claim Check

Hierarchy

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

Nearest codes (40)

Change history (2)

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.

Common coding questions

MedCoder editorial

Can M86.8X4 be billed directly?

No. M86.8X4 (Other osteomyelitis, hand) is a non-billable ICD-10-CM category code. A more specific billable subcode must be selected based on clinical documentation.

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
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. "M86.8X4 — Other osteomyelitis, hand." ICD-10-CM FY2027. https://medcoder.ai/icd10/code/m86.8x4-other-osteomyelitis-hand

Change history

Changed in FY2027, the release in force: Became a non-billable header.

  • FY2027 — October 1, 2026
    Became a non-billable header
    FY2027 changes
  • FY2016 — October 1, 2015
    In the code set at ICD-10-CM adoption
    Other osteomyelitis, hand

Nearest Codes in This Family

Official ICD-10-CM classifications closest to M86.8X4 in its code family, with their registry titles.

View all codes in the M86 family