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O12.05 ICD-10-CM Code: Gestational edema, complicating the puerperium

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

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.

The tabular list publishes no instructional note for this code itself.

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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.

Coder workflow for O12.05

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

Before you code O12.05

  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).

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 O12.05 with…

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

The codes most likely to be picked instead of O12.05 — 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.

  • O12.00— 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 edema, unspecified trimester” takes O12.00; specificity in the record moves it back here.

    Full comparison: O12.05 vs O12.00 →

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 edema, complicating the puerperium is a billable ICD-10-CM diagnosis code (O12.05).

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

  • 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 O12.05 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: R60 — Edema, not elsewhere classified (via O12.0.-).

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: O99.4 — Diseases of the circulatory system complicating pregnancy, childbirth and the puerperium (via O12.-).

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):PRG027 — Complications specified during the puerperium (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 (Complications specified during the puerperium).

F53.0 — Postpartum depression, F53.1 — Puerperal psychosis, M83.0 — Puerperal osteomalacia, O10.03 — Pre-existing essential hypertension complicating the puerperium, O10.13 — Pre-existing hypertensive heart disease complicating the puerperium, O10.23 — Pre-existing hypertensive chronic kidney disease complicating the puerperium, O10.33 — Pre-existing hypertensive heart and chronic kidney disease complicating the puerperium, O10.43 — Pre-existing secondary hypertension complicating the puerperium, O10.93 — Unspecified pre-existing hypertension complicating the puerperium, O11.5 — Pre-existing hypertension with pre-eclampsia, complicating the puerperium, O12.15 — Gestational proteinuria, complicating the puerperium, O12.25 — Gestational edema with proteinuria, complicating the puerperium, O13.5 — Gestational [pregnancy-induced] hypertension without significant proteinuria, complicating the puerperium, O14.05 — Mild to moderate pre-eclampsia, complicating the puerperium, O14.15 — Severe pre-eclampsia, complicating the puerperium, O14.25 — HELLP syndrome, complicating the puerperium, O14.95 — Unspecified pre-eclampsia, complicating the puerperium, O15.2 — Eclampsia complicating the puerperium, O16.5 — Unspecified maternal hypertension, complicating the puerperium, O24.03 — Pre-existing type 1 diabetes mellitus, in the puerperium, +113 more

Same Index main term, other category

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

A34 — Obstetrical tetanus (tetanus), F05 — Delirium due to known physiological condition (delirium NEC), F30.8 — Other manic episodes (mania), F53.1 — Puerperal psychosis (psychosis), O15.2 — Eclampsia complicating the puerperium (toxemia), O24.03 — Pre-existing type 1 diabetes mellitus, in the puerperium (diabetes, pre-existing, type 1), O24.13 — Pre-existing type 2 diabetes mellitus, in the puerperium (diabetes, pre-existing, type 2), O24.33 — Unspecified pre-existing diabetes mellitus in the puerperium (diabetes, pre-existing), O24.430 — Gestational diabetes mellitus in the puerperium, diet controlled (gestational, diabetes, diet controlled), O24.434 — Gestational diabetes mellitus in the puerperium, insulin controlled (gestational, diabetes, insulincontrolled), O24.435 — Gestational diabetes mellitus in puerperium, controlled by oral hypoglycemic drugs (gestational, diabetes, oral drug controlled), O24.439 — Gestational diabetes mellitus in the puerperium, unspecified control (gestational, diabetes), O24.83 — Other pre-existing diabetes mellitus in the puerperium (diabetes, pre-existing, specified NEC), O24.93 — Unspecified diabetes mellitus in the puerperium (diabetes), 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), +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.

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 O12.05 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 O12.05 with these 2 related codes in Claim Check

Hierarchy

Referenced by Excludes1 notes

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

  • Puerperal, puerperium (complicated by, complications), gestational, edema[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2027

Nearest codes (21)

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
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. "O12.05 — Gestational edema, complicating the puerperium." ICD-10-CM FY2027. https://medcoder.ai/icd10/code/o12.05-gestational-edema-complicating-the-puerperium

Change history

  • FY2017 — October 1, 2016
    Added to the code set
    Gestational edema, complicating the puerperium
    FY2017 changes

Nearest Codes in This Family

Official ICD-10-CM classifications closest to O12.05 in its code family, with their registry titles.

View all codes in the O12 family