2027 ICD-10-CM Diagnosis Code P01.2Newborn affected by oligohydramnios

ICD-10-CM Codes›P00–P96›P00-P04›P01

ICD-10-CM P01.2
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

P01.2 is a billable ICD-10-CM diagnosis code for newborn affected by oligohydramnios. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 794. Coders also document this condition as hydranencephaly. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Newborn affected by maternal conditions or complications of labor/delivery.

Code Identity

ICD-10-CM Code
P01.2
Billable Status
Yes — Valid for Submission
Code Describes
Newborn affected by oligohydramnios
Short Description
Newborn affected by oligohydramnios
Same as the full description in the CMS dataset.
Parent Code
P01
Newborn affected by maternal complications of pregnancy

Code Classification

ChapterP00–P96Certain conditions originating in the perinatal period
SectionP00-P04Newborn affected by maternal factors and by complications of pregnancy, labor, and delivery
CategoryP01Newborn affected by maternal complications of pregnancy
This CodeP01.2Newborn affected by oligohydramnios

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Hydranencephaly
  • MARCH syndrome

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to P01.2: its own notes plus those printed at P01, block P00-P04, and Chapter 16. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

From Chapter 16 (P00-P96) Certain conditions originating in the perinatal period applies to 463 codes
  • conditions that have their origin in the fetal or perinatal period (before birth through the first 28 days after birth) even if morbidity occurs later

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

  • oligohydramnios due to premature rupture of membranes (P01.1)

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From P01 Newborn affected by maternal complications of pregnancy applies to 10 codes
  • encounter for observation of newborn for suspected diseases and conditions ruled out (Z05.-)
From Chapter 16 (P00-P96) Certain conditions originating in the perinatal period applies to 463 codes
  • congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • tetanus neonatorum (A33)

Code First

The underlying condition named in the note is sequenced before this code.

From P01 Newborn affected by maternal complications of pregnancy applies to 10 codes
  • any current condition in newborn

Notes

General instructions on how these codes are used.

From Block P00-P04 Newborn affected by maternal factors and by complications of pregnancy, labor, and delivery applies to 70 codes
  • These codes are for use when the listed maternal conditions are specified as the cause of confirmed morbidity or potential morbidity which have their origin in the perinatal period (before birth through the first 28 days after birth).
From Chapter 16 (P00-P96) Certain conditions originating in the perinatal period applies to 463 codes
  • Codes from this chapter are for use on newborn records only, never on maternal records

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name P01.2, its category, or a range that includes it.

Excludes2 1

These codes carry an Excludes2 note naming P01.2: its condition is not part of those codes, and both may be reported when the patient has both.

  • P00 Newborn affected by maternal conditions that may be unrelated to present pregnancy
    newborn affected by maternal complications of pregnancy (P01.-) names P01.-, which includes this code

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR PNL010
Newborn affected by maternal conditions or complications of labor/delivery
Default principal diagnosis: inpatient Yes · outpatient Yes

Convert P01.2 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
761.2 Oligohydramnios aff NB
Exact Match The mapping is direct, with no qualifiers.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About P01.2Overview

What is the ICD-10 code for newborn affected by oligohydramnios?

The ICD-10-CM code for newborn affected by oligohydramnios is P01.2 (sometimes written as P012). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is P01.2 (Newborn affected by maternal complications of pregnancy) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report newborn affected by oligohydramnios on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does P01.2 group to?

When newborn affected by oligohydramnios is the principal diagnosis on an inpatient stay, it groups to MS-DRG 794 (neonate with Other Significant Problems), which carries a relative weight of 1.4934. Higher weights mean higher Medicare reimbursement.

Can P01.2 be reported with P01.1?

Not as a rule. The Excludes1 note on P01.2 lists "oligohydramnios due to premature rupture of membranes (P01.1)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).

What is coded first with P01.2?

The Code First note at P01, which applies to P01.2, reads: any current condition in newborn. When one of these applies, it is sequenced before P01.2.