2026 ICD-10-CM Diagnosis Code O43.899Other placental disorders, unspecified trimester
ICD-10-CM Codes›O00-O9A›O30-O48›O43
- Billable — Valid for Submission
- Not Chronic
O43.899 is a billable ICD-10-CM diagnosis code for other placental disorders, unspecified trimester. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 817 through 819, 831 through 833. The code is restricted by the Medicare Code Editor to maternity cases (age 9 through 64). In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Maternal care related to disorders of the placenta and placental implantation.
Code Identity
Code Classification
Code EditsBilling
Medicare Code Editor checks that affect claim validity for O43.899.
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Deficiency of placental function
- Deficiency of steryl-sulfatase
- Disorder of placental barrier function
- Disorder of placental circulatory function
- Disorder of placental endocrine function
- Dysplasia of mesenchymal cell of placenta
- Ectopic placenta
- Edema of placenta
- Exaggerated placental site
- Fetal disorder due to anomaly of placenta
- Fetal disorder due to chorangioma of placenta
- Fetal disorder due to deficiency of placental function
- Fetal disorder due to fetal-maternal hemorrhage
- Fetal disorder due to injury of placenta following amniocentesis
- Fetal disorder due to injury of placenta following surgical induction
- Fetal disorder due to large placenta
- Fetal disorder due to placental edema
- Fetal disorder due to placental hemorrhage
- Fetal disorder due to placental transfusion syndrome
- Fetal disorder due to rupture of marginal sinus of placenta
- Fetal disorder due to small placenta
- Fetal disorder due to vasa previa of umbilical cord
- Finding of color of placenta
- Finding of consistency of placenta
- Fresh retroplacental clot
- Gestational edema
- Gestational trophoblastic disease
- Gestational trophoblastic lesion
- Gestational trophoblastic neoplasia
- Hematoma of uterus
- Hydropic degeneration of chorionic villi
- Hydrops of placenta
- Injury of placenta
- Intraplacental hematoma
- Massive perivillous fibrin deposition
- Necrosis of placenta
- Odor of placenta - finding
- Old retroplacental clot
- Placenta calcified
- Placenta circummarginate
- Placenta extrachorales
- Placenta fatty deposits
- Placenta gritty
- Placenta offensive odor
- Placenta pale
- Placenta unhealthy
- Placental aromatase deficiency
- Placental hemorrhage
- Placental sulfatase deficiency
- Placental transfusion syndromes
- Premature aging of placenta
- Retroplacental clot
- Retroplacental hematoma
- Rupture of marginal sinus of placenta
- Rupture of uterus
- Rupture of vein
- Variation of placental position
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Gestational Trophoblastic Disease
a group of diseases arising from pregnancy that are commonly associated with hyperplasia of trophoblasts (trophoblast) and markedly elevated human chorionic gonadotropin. they include hydatidiform mole, invasive mole (hydatidiform mole, invasive), placental-site trophoblastic tumor (trophoblastic tumor, placental site), and choriocarcinoma. these neoplasms have varying propensities for invasion and spread.Placental Aromatase Deficiency
an autosomal recessive condition that results in aromatase deficiency in the placenta, causing temporary virilization of the pregnant woman and virilization of her 46,xx fetus.
Patient EducationClinical
Health Problems in Pregnancy
A health problem in pregnancy is any disease or condition that could affect your health or the health of your fetus. Some health problems may make it more likely that you will have a high-risk pregnancy. A high-risk pregnancy is one in which you, your fetus, or both are at higher risk for health problems than in a typical pregnancy.
The full article covers:
- What are health problems in pregnancy?
- What raises my risk for health problems during pregnancy?
- Can chronic health conditions cause problems in pregnancy?
- Can health problems in pregnancy be prevented?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert O43.899 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About O43.899Overview
Is O43.899 (Other placental disorders) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report other placental disorders, unspecified trimester on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does O43.899 group to?
When other placental disorders, unspecified trimester is the principal diagnosis on an inpatient stay, it groups to MS-DRG 817, 818, 819, 831, 832, 833, with relative weights from 0.5229 to 1.6880 depending on complications. Higher weights mean higher Medicare reimbursement.
Who can O43.899 be reported for?
The Medicare Code Editor checks other placental disorders, unspecified trimester against patient demographics: this code is intended for maternity cases (age 9 through 64). Claims outside these limits are flagged as inconsistent.
What is the ICD-9 equivalent of O43.899?
Under the General Equivalence Mappings, other placental disorders, unspecified trimester converts to ICD-9-CM 656.80 (fet/plac prob NEC-unspec). The mapping is approximate, so confirm the match fits the documentation.
Footnotes
[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.
