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ICD-10-CM 2027 diagnosis code

P91.822Neonatal cerebral infarction, left side of brain

✓ Billable / specificPOA exemptMCC — major complication/comorbidity

P91.822 is a valid, billable ICD-10-CM code for neonatal cerebral infarction, left side of brain. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Code last changed in FY2021 (effective October 1, 2020). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About P91.822

P91.822 is the ICD-10-CM diagnosis code for neonatal cerebral infarction, left side of brain. It belongs to category P91 (other disturbances of cerebral status of newborn), block P90-P96 (other disorders originating in 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 P91.82 (neonatal cerebral infarction), P91.822 is specifically for neonatal cerebral infarction, left side of brain. Related codes cover right side of brain (P91.821), bilateral (P91.823) and unspecified side (P91.829).

As a secondary diagnosis it is an MCC (major complication or comorbidity), which can move an inpatient stay into the highest-paying "with MCC" MS-DRG of its family, unless the principal diagnosis excludes it.

In MS-DRG v44.0, it is part of the grouping logic for DRG 791 (Prematurity with Major Problems, relative weight 4.1075) and DRG 793 (Full Term Neonate with Major Problems, relative weight 4.2195), 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 is exempt from present-on-admission (POA) reporting, so no POA indicator is required.

It was added in FY2021, effective October 1, 2020.

Notes that apply from higher levels

Instructions written at a parent level also apply to P91.822.

› From P91.82 Neonatal cerebral infarction
Excludes1
  • cerebral infarction (I63.-)
Excludes2
  • intracranial hemorrhage of newborn (P52.-)

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

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

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

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
  • FY2021 (effective 10/1/2020): Added
  • No changes since FY2021.

Common questions about P91.822

Is P91.822 billable?

Yes. P91.822 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can P91.822 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict P91.822 as a principal diagnosis.

Is P91.822 a CC or MCC?

P91.822 is an MCC (major complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.

What DRG does P91.822 group to?

P91.822 is used in the MS-DRG v44.0 logic for MS-DRG 791 (Prematurity with Major Problems) and MS-DRG 793 (Full Term Neonate with Major Problems). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.