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O24.435 ICD-10-CM Code: Gestational diabetes mellitus in puerperium, controlled by oral hypoglycemic drugs

Compare with another code for O24.435Check 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 inclusion term · 2 Excludes2

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.

Excludes2from O20-O29Not included here; may be reported together
  • maternal care related to the fetus and amniotic cavity and possible delivery problems (O30-O48)
  • maternal diseases classifiable elsewhere but complicating pregnancy, labor and delivery, and the puerperium (O98-O99)
IncludesWhat this code covers
  • Gestational diabetes mellitus in puerperium, controlled by oral antidiabetic drugs

Where it sits Source: CMS/NCHS

Under:Chapter 15: Pregnancy, Childbirth and the PuerperiumO20-O29 Other maternal disorders predominantly related to pregnancyO24 Diabetes mellitus in pregnancy, childbirth, and the puerperiumO24.4 Gestational diabetes mellitusO24.43 Gestational diabetes mellitus in the puerperium

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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 769 — POSTPARTUM AND POST ABORTION DIAGNOSES WITH O.R. PROCEDURES (MDC 14)
  • MS-DRG 776 — POSTPARTUM AND POST ABORTION DIAGNOSES WITHOUT O.R. PROCEDURES (MDC 14)

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 O24.435 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 O24.435 itself; “inherited from” names the category or block whose note applies here.

Inclusion Terms

Alternative terms the tabular list files under this code.

  • Gestational diabetes mellitus in puerperium, controlled by oral antidiabetic drugs

Excludes2 — Not Included Here

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

Source: inherited from O20-O29

Coder workflow for O24.435

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

Before you code O24.435

  1. Confirm the condition is documented as complicating the pregnancy, childbirth, or the puerperium, and check the trimester where the code carries one and the fetus character where the category requires it. Chapter 15 codes belong on the maternal record only and take sequencing priority over codes from other chapters. It is the provider’s responsibility to state that a condition is not affecting the pregnancy; the trimester is assigned from the documentation (Guidelines I.C.15.a, I.C.15.a.1, I.C.15.a.3).

    Guide: How to choose an ICD-10-CM code →

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).
Trimester
Assigned from the documented trimester at the encounter, or the trimester in which the condition developed for inpatient stays (Guidelines I.C.15.a.3).

Official instructions as workflow

  • Excludes2 — not part of O24.435(2 notes)

    Coding workflow: The conditions named in this note are not included in O24.435. When the record documents both, both may be reported; the note is a boundary, not a prohibition.

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

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 O24.435 with…

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

The codes most likely to be picked instead of O24.435 — 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.

  • O24.439— 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 “Gestational diabetes mellitus in the puerperium, unspecified control” takes O24.439; specificity in the record moves it back here.

    Full comparison: O24.435 vs O24.439 →

  • O30— 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 maternal care related to the fetus and amniotic cavity and possible delivery problems adds O30; it is not part of this code and both may be reported when both are documented.

    Full comparison: O24.435 vs O30 →

  • O48— 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 maternal care related to the fetus and amniotic cavity and possible delivery problems adds O48; it is not part of this code and both may be reported when both are documented.

    Full comparison: O24.435 vs O48 →

  • O98— 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 maternal diseases classifiable elsewhere but complicating pregnancy, labor and delivery, and the puerperium adds O98; it is not part of this code and both may be reported when both are documented.

    Full comparison: O24.435 vs O98 →

  • O99— 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 maternal diseases classifiable elsewhere but complicating pregnancy, labor and delivery, and the puerperium adds O99; it is not part of this code and both may be reported when both are documented.

    Full comparison: O24.435 vs O99 →

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

Gestational diabetes mellitus in puerperium, controlled by oral hypoglycemic drugs is a billable ICD-10-CM diagnosis code (O24.435).

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

Official source data — quoted verbatim from the CMS/NCHS Official Guidelines

Verbatim excerpts from the ICD-10-CM Official Guidelines for Coding and Reporting (CMS/NCHS) that govern this code.

Chapter 15: Pregnancy, Childbirth, and the Puerperium (O00-O9A)

Codes for gestational diabetes are in subcategory O24.4, Gestational diabetes mellitus. No other code from category O24, Diabetes mellitus in pregnancy, childbirth, and the puerperium, should be used with a code from O24.4.

Chapter 15: Pregnancy, Childbirth, and the Puerperium (O00-O9A)

The codes under subcategory O24.4 include diet controlled, insulin controlled, and controlled by oral hypoglycemic drugs. If a patient with gestational diabetes is treated with both diet and insulin, only the code for insulin-controlled is required. If a patient with gestational diabetes is treated with both diet and oral hypoglycemic medications, only the code for "controlled by oral hypoglycemic drugs" is required. Codes Z79.4, Long-term (current) use of insulin, Z79.84, Long-term (current) use of oral hypoglycemic drugs, and Z79.85, Long-term (current) use of injectable non-insulin antidiabetic drugs, should not be assigned with codes from subcategory O24.4.

Chapter 15: Pregnancy, Childbirth, and the Puerperium (O00-O9A)

g. Diabetes mellitus in pregnancy Diabetes mellitus is a significant complicating factor in pregnancy. Pregnant patients who are diabetic should be assigned a code from category O24, Diabetes mellitus in pregnancy, childbirth, and the puerperium, first, followed by the appropriate diabetes code(s) (E08-E13) from Chapter 4.

Verify Before Coding

  • Age-restricted: the Medicare Code Editor lists this as a maternity (age 9-64) diagnosis; other ages are presumed incorrect.

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 O24.435 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 9 Excludes1 notes across 4 chapters: E08 — Diabetes mellitus due to underlying condition (via O24.4.-), E09 — Drug or chemical induced diabetes mellitus (via O24.4.-), E10 — Type 1 diabetes mellitus (via O24.4.-), E11 — Type 2 diabetes mellitus (via O24.4.-), E13 — Other specified diabetes mellitus (via O24.4.-), O99.81 — Abnormal glucose complicating pregnancy, childbirth and the puerperium (via O24.4.-), R73 — Elevated blood glucose level (via O24.-), R73.0 — Abnormal glucose (via O24.4.-), Z86.32 — Personal history of gestational diabetes (via O24.4.-).

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: O99.2 — Endocrine, nutritional and metabolic diseases complicating pregnancy, childbirth and the puerperium (via O24.-).

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

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 2 MS-DRGs: DRG 769 (MDC 14), DRG 776 (MDC 14).

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

Clinical classification (AHRQ CCSR):PRG019 — Diabetes or abnormal glucose tolerance complicating pregnancy; childbirth; or the puerperium (default); END002 — Diabetes mellitus without complication; PRG027 — Complications specified during the puerperium.

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 categories (Diabetes or abnormal glucose tolerance complicating pregnancy; childbirth; or the puerperium, Diabetes mellitus without complication, Complications specified during the puerperium).

O24.410 — Gestational diabetes mellitus in pregnancy, diet controlled, O24.414 — Gestational diabetes mellitus in pregnancy, insulin controlled, O24.415 — Gestational diabetes mellitus in pregnancy, controlled by oral hypoglycemic drugs, O24.419 — Gestational diabetes mellitus in pregnancy, unspecified control, O24.420 — Gestational diabetes mellitus in childbirth, diet controlled, O24.424 — Gestational diabetes mellitus in childbirth, insulin controlled, O24.425 — Gestational diabetes mellitus in childbirth, controlled by oral hypoglycemic drugs, O24.429 — Gestational diabetes mellitus in childbirth, unspecified control, O24.430 — Gestational diabetes mellitus in the puerperium, diet controlled, O24.434 — Gestational diabetes mellitus in the puerperium, insulin controlled, O24.439 — Gestational diabetes mellitus in the puerperium, unspecified control, O24.811 — Other pre-existing diabetes mellitus in pregnancy, first trimester, O24.812 — Other pre-existing diabetes mellitus in pregnancy, second trimester, O24.813 — Other pre-existing diabetes mellitus in pregnancy, third trimester, O24.819 — Other pre-existing diabetes mellitus in pregnancy, unspecified trimester, O24.82 — Other pre-existing diabetes mellitus in childbirth, O24.83 — Other pre-existing diabetes mellitus in the puerperium, O24.911 — Unspecified diabetes mellitus in pregnancy, first trimester, O24.912 — Unspecified diabetes mellitus in pregnancy, second trimester, O24.913 — Unspecified diabetes mellitus in pregnancy, third trimester, +158 more

Same Index main term, other category

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

E83.110 — Hereditary hemochromatosis (bronzed), E83.39 — Other disorders of phosphorus metabolism (phosphate), F05 — Delirium due to known physiological condition (delirium NEC), F30.8 — Other manic episodes (mania), F53.1 — Puerperal psychosis (psychosis), N25.1 — Nephrogenic diabetes insipidus (insipidus, nephrogenic), O12.05 — Gestational edema, complicating the puerperium (gestational, edema), O12.15 — Gestational proteinuria, complicating the puerperium (gestational, proteinuria), O12.25 — Gestational edema with proteinuria, complicating the puerperium (gestational, edema, with proteinuria), O15.2 — Eclampsia complicating the puerperium (toxemia), O25.3 — Malnutrition in the puerperium (malnutrition), O26.63 — Liver and biliary tract disorders in the puerperium (disorder, liver), O26.73 — Subluxation of symphysis (pubis) in the puerperium (subluxation of symphysis), O72.0 — Third-stage hemorrhage (retention, placenta), O72.1 — Other immediate postpartum hemorrhage (hemorrhage), O72.2 — Delayed and secondary postpartum hemorrhage (hemorrhage, uterine, delayed), O72.3 — Postpartum coagulation defects (blood dyscrasia), O85 — Puerperal sepsis (pyemia), O86.09 — Infection of obstetric surgical wound, other surgical site (infection, genital tract NEC, obstetric surgical wound), O86.11 — Cervicitis following delivery (cervicitis), +318 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.

HbA1c Test (Glycated Hemoglobin), Blood Glucose Test, HIV Screening Test, Partial Thromboplastin Time (PTT) Test, Pregnancy Test, Prothrombin Time Test and INR (PT/INR), Thyroid Stimulating Hormone (TSH)

Contextual Map

Every relationship of O24.435 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 O24.435 with these 9 related codes in Claim Check

Hierarchy

Referenced by Excludes1 notes (9)

Referenced by Excludes2 notes

Clinical classification (CCSR)

MS-DRG Grouper

MDC crossing

  • MDC 14 — Pregnancy, Childbirth and the Puerperium[MDC crossing]: “Pregnancy, Childbirth and the Puerperium — 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. 94 same-MDC procedures group here; browse them on the MDC page.”— CMS MS-DRG Definitions Manual · FY2027

Index entries

  • Diabetes, diabetic (mellitus) (sugar), gestational (in pregnancy), puerperal, oral drug controlled (antidiabetic) (hypoglycemic)[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2027
  • Puerperal, puerperium (complicated by, complications), gestational, diabetes, oral drug controlled (antidiabetic) (hypoglycemic)[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2027

Nearest codes (40)

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 (2)

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 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. "O24.435 — Gestational diabetes mellitus in puerperium, controlled by oral hypoglycemic drugs." ICD-10-CM FY2027. https://medcoder.ai/icd10/code/o24.435-gestational-diabetes-mellitus-in-puerperium-controlled-by-oral-hypoglycemic-drugs

Change history

  • FY2017 — October 1, 2016
    Added to the code set
    Gestational diabetes mellitus in puerperium, controlled by oral hypoglycemic drugs
    FY2017 changes

Nearest Codes in This Family

Official ICD-10-CM classifications closest to O24.435 in its code family, with their registry titles.

View all codes in the O24 family