2027 ICD-10-CM Diagnosis Code P07.36Preterm newborn, gestational age 33 completed weeks

ICD-10-CM Codes›P00–P96›P05-P08›P07

ICD-10-CM P07.36
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

P07.36 is a billable ICD-10-CM diagnosis code for preterm newborn, gestational age 33 completed weeks. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 791 through 792. Coders also document this condition as baby premature 32 weeks to 35 weeks and 6 days. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Short gestation; low birth weight; and fetal growth retardation.

Code Identity

ICD-10-CM Code
P07.36
Billable Status
Yes — Valid for Submission
Code Describes
Preterm newborn, gestational age 33 completed weeks
Short Description
Preterm newborn, gestational age 33 completed weeks
Same as the full description in the CMS dataset.
Parent Code
P07.3
Preterm [premature] newborn [other]

Code Classification

ChapterP00–P96Certain conditions originating in the perinatal period
SectionP05-P08Disorders of newborn related to length of gestation and fetal growth
CategoryP07Disorders of newborn related to short gestation and low birth weight, not elsewhere classified
This CodeP07.36Preterm newborn, gestational age 33 completed weeks

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Baby premature 32 weeks to 35 weeks and 6 days
  • Baby premature 33 weeks
  • Moderate preterm infant from 32 weeks up to 33 weeks and 6 days gestation

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to P07.36: its own notes plus those printed at P07 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 P07 Disorders of newborn related to short gestation and low birth weight, not elsewhere classified applies to 27 codes
  • the listed conditions, without further specification, as the cause of morbidity or additional care, in newborn
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

Applicable To

Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.

  • Preterm newborn, gestational age 33 weeks, 0 days through 33 weeks, 6 days

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 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)

Notes

General instructions on how these codes are used.

From P07 Disorders of newborn related to short gestation and low birth weight, not elsewhere classified applies to 27 codes
  • When both birth weight and gestational age of the newborn are available, both should be coded with birth weight sequenced before gestational age
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.

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 PNL002
Short gestation; low birth weight; and fetal growth retardation
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Premature Babies

Almost 1 of every 10 infants born in the United States are premature, or preemies. A premature birth is when a baby is born before 37 completed weeks of pregnancy. A full-term pregnancy is 40 weeks.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert P07.36 to ICD-9-CMHistory

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

ICD-9-CM
765.27 33-34 comp wks gestation
Approximate The match is approximate rather than exact.

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 P07.36Overview

What is the ICD-10 code for preterm newborn, gestational age 33 completed weeks?

The ICD-10-CM code for preterm newborn, gestational age 33 completed weeks is P07.36 (sometimes written as P0736). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is P07.36 (Preterm [premature] newborn [other]) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report preterm newborn, gestational age 33 completed weeks on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does P07.36 group to?

When preterm newborn, gestational age 33 completed weeks is the principal diagnosis on an inpatient stay, it groups to MS-DRG 791, 792, with relative weights from 2.4783 to 4.1073 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of P07.36?

Under the General Equivalence Mappings, preterm newborn, gestational age 33 completed weeks converts to ICD-9-CM 765.27 (33-34 comp wks gestation). The mapping is approximate, so confirm the match fits the documentation.