Skip to main content

D75.829 ICD-10-CM Code: Heparin-induced thrombocytopenia, unspecified

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
6 Excludes2 · 1 use-additional code
Risk adjustment
CMS-HCC V22 category 48

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, if applicable, for adverse effect of heparin (T45.515-)
Excludes2Not included here; may be reported together
  • acute lymphadenitis (L04.-)
  • chronic lymphadenitis (I88.1)
  • enlarged lymph nodes (R59.-)
  • hypergammaglobulinemia NOS (D89.2)

+2 more in Instructions

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 791 — PREMATURITY WITH MAJOR PROBLEMS (MDC 15)
  • MS-DRG 793 — FULL TERM NEONATE WITH MAJOR PROBLEMS (MDC 15)
  • MS-DRG 813 — COAGULATION DISORDERS (MDC 16)

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.

Coding instructions

Official Tabular Instructional Notes: the inclusion, exclusion and sequencing notes published for D75.829 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 D75.829 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 D75

Use Additional Code

Supplementary codes the tabular list directs you to add.

  • Use additional code, if applicable, for adverse effect of heparin (T45.515-)

Source: inherited from D75.82

Coder workflow for D75.829

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

Before you code D75.829

  1. Unspecified does not mean incorrect. When the record gives no greater specificity, D75.829 may be the appropriate code. Check the record for detail that supports a more specific sibling. An unspecified code is for records that do not provide the detail a more specific code needs; a query, not an assumption, is the route to specificity (Guidelines I.A.9.b, I.B.18).

    ReviewD75.821, D75.822, D75.828

    See the relationships section · Guide: Other vs unspecified (NEC vs NOS) →

Choose the right path

  1. Does the record document the detail a more specific sibling code needs?
    Yes → Review the specific siblings in this subcategory.
    No → Continue — D75.829 is appropriate when the documentation goes no further.

    ReviewD75.821, D75.822, D75.828

Consider D75.829. Then work the Use Additional Code note, and 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).
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 sibling code would capture — or its absence, which itself supports the unspecified code.

Official instructions as workflow

  • Excludes2 — not part of D75.829(6 notes)

    Coding workflow: The conditions named in this note are not included in D75.829. When the record documents both, both may be reported; the note is a boundary, not a prohibition.

    CompareL04, I88.1, R59, D89.2, I88.9, I88.0

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

  • Use Additional Code — after identifying D75.829(1 note)

    Coding workflow: Check whether the documentation supports the additional code(s) the note names, and report them with D75.829 when it does. Where the instruction is conditional (“if applicable”, “if known”), it applies only when the record documents the condition.

    ReviewT45.515

    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: The provider documents the condition in the terms of this code’s title and records no further detail.

Coding question: Is a more specific sibling code supportable?

Path: Review the specific siblings in this subcategory and what each requires the record to state.

Reason: A more specific code needs documentation of the distinguishing element; without it the unspecified code is appropriate, and a provider query is the route to specificity (Guidelines I.A.9.b, I.B.18).

ReviewD75.821, D75.822, D75.828

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

Coding question: Is a second code reported with D75.829?

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).

ReviewT45.515

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 D75.829 with…

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

The codes most likely to be picked instead of D75.829 — 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.

  • L04— 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 acute lymphadenitis adds L04; it is not part of this code and both may be reported when both are documented.

    Full comparison: D75.829 vs L04 →

  • I88.1— 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 chronic lymphadenitis adds I88.1; it is not part of this code and both may be reported when both are documented.

    Full comparison: D75.829 vs I88.1 →

  • R59— 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 enlarged lymph nodes adds R59; it is not part of this code and both may be reported when both are documented.

    Full comparison: D75.829 vs R59 →

  • D89.2— 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 hypergammaglobulinemia NOS adds D89.2; it is not part of this code and both may be reported when both are documented.

    Full comparison: D75.829 vs D89.2 →

  • I88.9— 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 lymphadenitis NOS adds I88.9; it is not part of this code and both may be reported when both are documented.

    Full comparison: D75.829 vs I88.9 →

  • I88.0— 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 mesenteric lymphadenitis (acute) (chronic) adds I88.0; it is not part of this code and both may be reported when both are documented.

    Full comparison: D75.829 vs I88.0 →

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

Heparin-induced thrombocytopenia, unspecified is a billable ICD-10-CM diagnosis code (D75.829).

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

Official Coding Guidelines

No excerpt in the ICD-10-CM Official Guidelines names this code specifically. Its chapter carries only this chapter-wide note:

Chapter 3: Disease of the blood and blood-forming organs and certain disorders involving the immune mechanism (D50-D89)

Reserved for future guideline expansion

Verify Before Coding

  • No Medicare Code Editor or MS-DRG Definitions Manual restrictions apply to this code.

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 D75.829 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 2 Excludes1 notes: D68.6 — Other thrombophilia (via D75.82.-), D69.5 — Secondary thrombocytopenia (via D75.82.-).

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

Referenced by 21 Code First instructions: T36 — Poisoning by, adverse effect of and underdosing of systemic antibiotics (via D75.-), T36-T39 — Antibiotics & Anti-infectives (T36-T39) (via D75.-), T36-T50 — Poisoning by, adverse effects of and underdosing of drugs, medicaments and biological substances (T36-T50) (via D75.-), T37 — Poisoning by, adverse effect of and underdosing of other systemic anti-infectives and antiparasitics (via D75.-), T38 — Poisoning by, adverse effect of and underdosing of hormones and their synthetic substitutes and antagonists, not elsewhere classified (via D75.-), T39 — Poisoning by, adverse effect of and underdosing of nonopioid analgesics, antipyretics and antirheumatics (via D75.-), T40 — Poisoning by, adverse effect of and underdosing of narcotics and psychodysleptics [hallucinogens] (via D75.-), T40-T41 — Analgesics & Antipyretics (T40-T41) (via D75.-), T41 — Poisoning by, adverse effect of and underdosing of anesthetics and therapeutic gases (via D75.-), T42 — Poisoning by, adverse effect of and underdosing of antiepileptic, sedative- hypnotic and antiparkinsonism drugs (via D75.-), T42-T43 — Anticonvulsants & Psychotropics (T42-T43) (via D75.-), T43 — Poisoning by, adverse effect of and underdosing of psychotropic drugs, not elsewhere classified (via D75.-), T44 — Poisoning by, adverse effect of and underdosing of drugs primarily affecting the autonomic nervous system (via D75.-), T44-T46 — Cardiovascular & Gastrointestinal (T44-T46) (via D75.-), T45 — Poisoning by, adverse effect of and underdosing of primarily systemic and hematological agents, not elsewhere classified (via D75.-), T46 — Poisoning by, adverse effect of and underdosing of agents primarily affecting the cardiovascular system (via D75.-), T47 — Poisoning by, adverse effect of and underdosing of agents primarily affecting the gastrointestinal system (via D75.-), T47-T50 — Hormones & Systemic Agents (T47-T50) (via D75.-), T48 — Poisoning by, adverse effect of and underdosing of agents primarily acting on smooth and skeletal muscles and the respiratory system (via D75.-), T49 — Poisoning by, adverse effect of and underdosing of topical agents primarily affecting skin and mucous membrane and by ophthalmological, otorhinorlaryngological and dental drugs (via D75.-), +1 more.

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: not on the CMS CC/MCC list — as a secondary diagnosis this code does not change MS-DRG severity for that release.

Named in the grouper logic of 3 MS-DRGs: DRG 791 (MDC 15), DRG 793 (MDC 15), DRG 813 (MDC 16).

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

Clinical classification (AHRQ CCSR):BLD006 — Coagulation and hemorrhagic disorders (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 clinical category (CCSR)

AHRQ's Clinical Classifications Software groups these diagnoses under the same clinical category (Coagulation and hemorrhagic disorders).

D69.1 — Qualitative platelet defects, D69.2 — Other nonthrombocytopenic purpura, D69.3 — Immune thrombocytopenic purpura, D69.41 — Evans syndrome, D69.42 — Congenital and hereditary thrombocytopenia purpura, D69.49 — Other primary thrombocytopenia, D69.51 — Posttransfusion purpura, D69.59 — Other secondary thrombocytopenia, D69.6 — Thrombocytopenia, unspecified, D69.8 — Other specified hemorrhagic conditions, D69.9 — Hemorrhagic condition, unspecified, D75.82 — Heparin induced thrombocytopenia (HIT), D75.821 — Non-immune heparin-induced thrombocytopenia, D75.822 — Immune-mediated heparin-induced thrombocytopenia, D75.828 — Other heparin-induced thrombocytopenia syndrome, D75.838 — Other thrombocytosis, D75.839 — Thrombocytosis, unspecified, D75.84 — Other platelet-activating anti-PF4 disorders, M36.2 — Hemophilic arthropathy, O72.3 — Postpartum coagulation defects, +31 more

Same Index main term, other category

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

D69.3 — Immune thrombocytopenic purpura (essential), D69.42 — Congenital and hereditary thrombocytopenia purpura (hereditary), D69.49 — Other primary thrombocytopenia (primary NEC), D69.59 — Other secondary thrombocytopenia (secondary), D69.6 — Thrombocytopenia, unspecified, O72.3 — Postpartum coagulation defects (puerperal, postpartum), P61.0 — Transient neonatal thrombocytopenia (transient neonatal), Q87.2 — Congenital malformation syndromes predominantly involving limbs (with absent radius)

Contextual Map

Every relationship of D75.829 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 D75.829 with these 10 related codes in Claim Check

Hierarchy

Referenced by Excludes1 notes

  • D68.6 — Other thrombophilia[Excludes1](via D75.82.-): “heparin induced thrombocytopenia (HIT) (D75.82-)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2027
  • D69.5 — Secondary thrombocytopenia[Excludes1](via D75.82.-): “heparin induced thrombocytopenia (HIT) (D75.82-)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2027

Referenced by Code First instructions (21)

Clinical classification (CCSR)

MS-DRG Grouper

MDC crossing

Index entries

  • Thrombocytopenia, thrombocytopenic, heparin induced (HIT)[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2027

Nearest codes (16)

Change history

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 (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.

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
Coding guidelines Official source data
ICD-10-CM Official Guidelines for Coding and Reporting (FY2027), quoted by section 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
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. "D75.829 — Heparin-induced thrombocytopenia, unspecified." ICD-10-CM FY2027. https://medcoder.ai/icd10/code/d75.829-heparin-induced-thrombocytopenia-unspecified

Change history

  • FY2023 — October 1, 2022
    Added to the code set
    Heparin-induced thrombocytopenia, unspecified
    FY2023 changes

Nearest Codes in This Family

Official ICD-10-CM classifications closest to D75.829 in its code family, with their registry titles.

View all codes in the D75 family