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O44.52 ICD-10-CM Code: Low lying placenta with hemorrhage, second trimester

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

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 817 — OTHER ANTEPARTUM DIAGNOSES WITH O.R. PROCEDURES WITH MCC (MDC 14)
  • MS-DRG 818 — OTHER ANTEPARTUM DIAGNOSES WITH O.R. PROCEDURES WITH CC (MDC 14)
  • MS-DRG 819 — OTHER ANTEPARTUM DIAGNOSES WITH O.R. PROCEDURES WITHOUT CC/MCC (MDC 14)
  • MS-DRG 831 — OTHER ANTEPARTUM DIAGNOSES WITHOUT O.R. PROCEDURES WITH MCC (MDC 14)
  • MS-DRG 832 — OTHER ANTEPARTUM DIAGNOSES WITHOUT O.R. PROCEDURES WITH CC (MDC 14)
  • MS-DRG 833 — OTHER ANTEPARTUM DIAGNOSES WITHOUT O.R. PROCEDURES WITHOUT CC/MCC (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 O44.52

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

Before you code O44.52

  1. O44.52’s title joins a condition with an associated condition or complication. Confirm each component is documented. Where the classification presumes the link through the “with” convention, only a provider statement that the conditions are unrelated defeats it. A combination code is assigned only when it fully identifies the documented conditions; a required second code for the stage, type or manifestation is still reported when the notes ask for it (Guidelines I.B.9, I.A.15).

    Guide: Combination codes →

  2. 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).
The associated condition or complication
Whether the associated condition the title names is documented; the “with” convention presumes some links, and a provider statement that the conditions are unrelated defeats it (Guidelines I.A.15).

Coding decision scenarios

Pattern scenarios for this code’s structure — decision rules, not clinical cases

Documentation: Only one of the components this code’s title joins is documented.

Coding question: Is O44.52 supported?

Path: Review the code for the documented component on its own.

Reason: A combination code is assigned only when it fully identifies the documented conditions; otherwise the documented component takes its own code (Guidelines I.B.9).

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

Low lying placenta with hemorrhage, second trimester is a billable ICD-10-CM diagnosis code (O44.52).

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.
  • MCC 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 O44.52 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: O46 — Antepartum hemorrhage, not elsewhere classified (via O44.-), O67 — Labor and delivery complicated by intrapartum hemorrhage, not elsewhere classified (via O44.-).

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

Referenced by 11 Excludes2 notes: O20 — Hemorrhage in early pregnancy (via O44.-), O20-O29 — Other maternal disorders predominantly related to pregnancy (O20-O29) (via O44.-), O21 — Excessive vomiting in pregnancy (via O44.-), O22 — Venous complications and hemorrhoids in pregnancy (via O44.-), O23 — Infections of genitourinary tract in pregnancy (via O44.-), O24 — Diabetes mellitus in pregnancy, childbirth, and the puerperium (via O44.-), O25 — Malnutrition in pregnancy, childbirth and the puerperium (via O44.-), O26 — Maternal care for other conditions predominantly related to pregnancy (via O44.-), O28 — Abnormal findings on antenatal screening of mother (via O44.-), O29 — Complications of anesthesia during pregnancy (via O44.-), O43 — Placental disorders (via O44.-).

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

MS-DRG Grouper Relationships (FY2026)

Potential MS-DRG participation — not a DRG assignment.

FY2026 MS-DRG: MCC — Major 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 247 clinically related codes on its CMS exclusion list.

Named in the grouper logic of 6 MS-DRGs: DRG 817 (MDC 14), DRG 818 (MDC 14), DRG 819 (MDC 14), DRG 831 (MDC 14), DRG 832 (MDC 14), DRG 833 (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):PRG018 — Maternal care related to disorders of the placenta and placental implantation (default); PRG010 — Hemorrhage after first trimester.

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 process (MS-DRG)

Acts as MCC — raises the severity of other admissions. CMS groups these diagnoses into one MS-DRG principal-diagnosis exclusion process — a CC/MCC on this list never raises severity when the principal diagnosis is also on it.

O44.30 — Partial placenta previa with hemorrhage, unspecified trimester, O44.31 — Partial placenta previa with hemorrhage, first trimester, O44.32 — Partial placenta previa with hemorrhage, second trimester, O44.33 — Partial placenta previa with hemorrhage, third trimester, O44.40 — Low lying placenta NOS or without hemorrhage, unspecified trimester, O44.41 — Low lying placenta NOS or without hemorrhage, first trimester, O44.42 — Low lying placenta NOS or without hemorrhage, second trimester, O44.43 — Low lying placenta NOS or without hemorrhage, third trimester, O44.50 — Low lying placenta with hemorrhage, unspecified trimester, O44.51 — Low lying placenta with hemorrhage, first trimester, O44.53 — Low lying placenta with hemorrhage, third trimester, O75.4 — Other complications of obstetric surgery and procedures, O75.81 — Maternal exhaustion complicating labor and delivery, O75.89 — Other specified complications of labor and delivery, O75.9 — Complication of labor and delivery, unspecified, O80 — Encounter for full-term uncomplicated delivery, O90.89 — Other complications of the puerperium, not elsewhere classified, O99.111 — Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy, first trimester, O99.112 — Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy, second trimester, O99.113 — Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy, third trimester, +226 more

Same clinical category (CCSR)

AHRQ's Clinical Classifications Software groups these diagnoses under the same clinical categories (Maternal care related to disorders of the placenta and placental implantation, Hemorrhage after first trimester).

O44.30 — Partial placenta previa with hemorrhage, unspecified trimester, O44.31 — Partial placenta previa with hemorrhage, first trimester, O44.32 — Partial placenta previa with hemorrhage, second trimester, O44.33 — Partial placenta previa with hemorrhage, third trimester, O44.40 — Low lying placenta NOS or without hemorrhage, unspecified trimester, O44.41 — Low lying placenta NOS or without hemorrhage, first trimester, O44.42 — Low lying placenta NOS or without hemorrhage, second trimester, O44.43 — Low lying placenta NOS or without hemorrhage, third trimester, O44.50 — Low lying placenta with hemorrhage, unspecified trimester, O44.51 — Low lying placenta with hemorrhage, first trimester, O44.53 — Low lying placenta with hemorrhage, third trimester, O45.001 — Premature separation of placenta with coagulation defect, unspecified, first trimester, O45.002 — Premature separation of placenta with coagulation defect, unspecified, second trimester, O45.003 — Premature separation of placenta with coagulation defect, unspecified, third trimester, O45.009 — Premature separation of placenta with coagulation defect, unspecified, unspecified trimester, O45.011 — Premature separation of placenta with afibrinogenemia, first trimester, O45.012 — Premature separation of placenta with afibrinogenemia, second trimester, O45.013 — Premature separation of placenta with afibrinogenemia, third trimester, O45.019 — Premature separation of placenta with afibrinogenemia, unspecified trimester, O45.021 — Premature separation of placenta with disseminated intravascular coagulation, first trimester, +123 more

Same Index main term, other category

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

O36.51 — Maternal care for known or suspected placental insufficiency (cesarean, placental insufficiency), O42.90 — Premature rupture of membranes, unspecified as to length of time between rupture and onset of labor, unspecified weeks of gestation (complicated, by, premature rupture, membranes), O43.01 — Fetomaternal placental transfusion syndrome (cesarean, fetal-maternal hemorrhage), O43.10 — Malformation of placenta, unspecified (complicated, by, placenta, placental, malformation), O43.12 — Velamentous insertion of umbilical cord (complicated, by, velamentous insertion of cord), O43.21 — Placenta accreta (complicated, by, placenta, placental, accreta), O43.22 — Placenta increta (complicated, by, placenta, placental, increta), O43.23 — Placenta percreta (complicated, by, placenta, placental, percreta), O43.89 — Other placental disorders (complicated, by, placenta, placental, disorder, specified NEC), O43.9 — Unspecified placental disorder (complicated, by, placenta, placental, disorder), O45.8X — Other premature separation of placenta (complicated, by, Couvelaire uterus), O45.9 — Premature separation of placenta, unspecified (cesarean, abruptio placentae), O60.10 — Preterm labor with preterm delivery, unspecified trimester (preterm), O61.0 — Failed medical induction of labor (cesarean, failed, induction of labor, medical), O61.1 — Failed instrumental induction of labor (cesarean, failed, induction of labor, surgical), O61.8 — Other failed induction of labor (cesarean, failed, induction of labor, specified NEC), O61.9 — Failed induction of labor, unspecified (cesarean, failed, induction of labor), O62.0 — Primary inadequate contractions (cesarean, poor dilatation, cervix), O62.1 — Secondary uterine inertia (arrested active phase), O62.2 — Other uterine inertia (cesarean, atony, uterus), +172 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 O44.52 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 O44.52 with these 10 related codes in Claim Check

Hierarchy

Referenced by Excludes1 notes

Referenced by Excludes2 notes (11)

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 · FY2026

Nearest codes (30)

Change history

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
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. "O44.52 — Low lying placenta with hemorrhage, second trimester." ICD-10-CM FY2026. https://medcoder.ai/icd10/code/o44.52-low-lying-placenta-with-hemorrhage-second-trimester

Change history

  • FY2017 — October 1, 2016
    Added to the code set
    Low lying placenta with hemorrhage, second trimester
    FY2017 changes

Nearest Codes in This Family

Official ICD-10-CM classifications closest to O44.52 in its code family, with their registry titles.

View all codes in the O44 family