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ICD-10-CM 2027 diagnosis code

P29.9Cardiovascular disorder originating in the perinatal period, unspecified

✓ Billable / specific

P29.9 is a valid, billable ICD-10-CM code for cardiovascular disorder originating in the perinatal period, unspecified. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.Short description: Cardiovasc disorder origin in the perinatal period, unsp

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About P29.9

P29.9 is the ICD-10-CM diagnosis code for cardiovascular disorder originating in the perinatal period, unspecified. It belongs to category P29 (cardiovascular disorders originating in the perinatal period), block P19-P29 (respiratory and cardiovascular disorders specific to the perinatal period) and chapter 16 (certain conditions originating in the perinatal period). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within P29, choose P29.9 (Cardiovascular disorder originating in the perinatal period, unspecified) only when documentation doesn't support a more specific option: neonatal cardiac failure (P29.0), neonatal cardiac dysrhythmia (P29.1), neonatal hypertension (P29.2), persistent fetal circulation (P29.3), transient myocardial ischemia in newborn (P29.4) and other cardiovascular disorders originating in the perinatal period (P29.8).

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 794 (Neonate with Other Significant Problems, relative weight 1.4935), in MDC 15 (Newborns and Other Neonates with Conditions Originating in the Perinatal Period), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 779.89 (other specified conditions originating in the perinatal period).

Notes that apply from higher levels

Instructions written at a parent level also apply to P29.9.

› From P29 Cardiovascular disorders originating in the perinatal period
Excludes2
  • congenital malformations of the circulatory system (Q20-Q28)

Broader instructions also apply from Chapter 16: Certain conditions originating in the perinatal period.

Alphabetic index entries

2 entries

Terms in the official ICD-10-CM index that lead to P29.9.

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

MDC 15 · Newborns and Other Neonates with Conditions Originating in the Perinatal Period

ICD-9-CM equivalent

Converter →
  • 779.89Other specified conditions originating in the perinatal periodapproximate

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about P29.9

Is P29.9 billable?

Yes. P29.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can P29.9 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict P29.9 as a principal diagnosis.

Is P29.9 a CC or MCC?

No. P29.9 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does P29.9 group to?

P29.9 is used in the MS-DRG v44.0 logic for MS-DRG 794 (Neonate with Other Significant Problems). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.

What is the ICD-9 code for P29.9?

The CMS General Equivalence Mappings map P29.9 to ICD-9-CM 779.89.