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P91.829 ICD-10-CM Code: Neonatal cerebral infarction, unspecified side

Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.

Inpatient Payment Groups (MS-DRG)

MS-DRGs this diagnosis helps define, as principal or secondary, per the CMS ICD-10-CM/PCS MS-DRG Definitions Manual v43.0, Appendix B.

  • MS-DRG 791 — PREMATURITY WITH MAJOR PROBLEMS (MDC 15)
  • MS-DRG 793 — FULL TERM NEONATE WITH MAJOR PROBLEMS (MDC 15)

A diagnosis appearing in a group's logic does not by itself determine the DRG assigned to a stay; the grouper uses the full claim.

Risk Adjustment (CMS-HCC)

Payment categories this diagnosis maps to under CMS-HCC V28, payment year 2026.

  • HCC 249 — Ischemic or Unspecified Stroke

Other models: CMS-HCC V22 HCC 100

Risk scores depend on the enrollee's full accepted diagnosis set and segment; a category mapping alone does not determine payment.

Official Registry Overview & Definition

Neonatal cerebral infarction, unspecified side is a billable ICD-10-CM diagnosis code (P91.829).

Official Tabular Instructional Notes

Sequencing, inclusion, and exclusion notes published for P91.829 in the official ICD-10-CM tabular list.

Excludes1 — Not Coded Here

Conditions generally not reported together with this code (Excludes1) -- an error unless the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).

Excludes2 — Not Included Here

Conditions not covered by this code, but which may be reported alongside it when both are present.

Frequently Compared Codes

The official Excludes notes on P91.829 name these codes. Each comparison page covers when the two can — or must not — be reported together.

Change history

  • FY2021 — 2020-10-01
    Added to the code set
    Neonatal cerebral infarction, unspecified side
    FY2021 changes

Verify Before Coding

  • MCC as a secondary diagnosis (FY2026). Can raise the stay's MS-DRG severity tier.

From the code registry, the Medicare Code Editor, and the MS-DRG Definitions Manual. Check it against a full claim.

Contextual Map

Every relationship of P91.829 in one view: hierarchy, official tabular instructions in both directions, clinical classification, risk adjustment, MS-DRG participation, index terms and change history — each edge carrying the CMS source it derives from.

Hierarchy

  • P00-P96 — Chapter 16: Certain Conditions Originating in the Perinatal Period (P00-P96) (P00-P96) [Hierarchy]
  • P90-P96 — Other disorders originating in the perinatal period [Hierarchy]

Referenced by Excludes1 notes

  • I63 — Cerebral infarction [Excludes1](via P91.82.-): “neonatal cerebral infarction (P91.82-)” · check together
  • P91.0 — Neonatal cerebral ischemia [Excludes1](via P91.82.-): “Neonatal cerebral infarction (P91.82-)” · check together

Clinical classification (CCSR)

  • PNL004 — Neonatal cerebral disorders [CCSR]

Risk adjustment (CMS-HCC)

  • HCC 249 — Ischemic or Unspecified Stroke [CMS-HCC]

Potential MS-DRG

  • MCC — Major Complication or Comorbidity [MS-DRG severity]: “As a secondary diagnosis this code can raise the stay's MS-DRG severity tier (MCC).”
  • DRG 791 — PREMATURITY WITH MAJOR PROBLEMS [MS-DRG]: “PREMATURITY WITH MAJOR PROBLEMS (MDC 15)”
  • DRG 793 — FULL TERM NEONATE WITH MAJOR PROBLEMS [MS-DRG]: “FULL TERM NEONATE WITH MAJOR PROBLEMS (MDC 15)”

MDC crossing · procedures

  • MDC 15 — Newborns and Other Neonates with Conditions Originating in Perinatal Period [MDC crossing]: “Newborns and Other Neonates with Conditions Originating in Perinatal Period — the grouper's crossing between diagnoses and procedures: a principal diagnosis sets the MDC, and same-MDC procedures move the stay to its surgical DRGs.”

Nearest codes (22)

  • P91 — Other disturbances of cerebral status of newborn [Sibling]
  • P91.0 — Neonatal cerebral ischemia [Sibling]
  • P91.1 — Acquired periventricular cysts of newborn [Sibling]
  • P91.2 — Neonatal cerebral leukomalacia [Sibling]
  • P91.3 — Neonatal cerebral irritability [Sibling]
  • P91.4 — Neonatal cerebral depression [Sibling]
  • P91.5 — Neonatal coma [Sibling]
  • P91.6 — Hypoxic ischemic encephalopathy [HIE] [Sibling]
  • and 14 more

Change history

  • FY2021 — Added to the code set [Change history]

Referenced by Other Codes

Clinical classification (AHRQ CCSR):PNL004 — Neonatal cerebral disorders (default).

Clinical Classifications Software Refined (CCSR) for ICD-10-CM Diagnoses. Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality.

Potential MS-DRG Relationships (FY2026)

MCC — Major Complication or Comorbidity. Reported as a secondary diagnosis, this code raises the stay's MS-DRG severity tier — except when the principal diagnosis is one of 4 clinically related codes on its CMS exclusion list.

Named in the grouper logic of 2 MS-DRGs: DRG 791 (MDC 15), DRG 793 (MDC 15).

From the CMS MS-DRG Definitions Manual (Appendices B and C). Actual DRG assignment depends on the complete claim.

Official ICD-10-CM tabular notes on other codes that name P91.829 or its code family.

2 Excludes1 notes across 2 chapters: I63 (via P91.82.-), P91.0 (via P91.82.-).

Nearest Codes in This Family

Official ICD-10-CM classifications closest to P91.829 in its code family, with their registry titles.

  • P91.8 — Other specified disturbances of cerebral status of newborn
  • P91.81 — Neonatal encephalopathy
  • P91.811 — Neonatal encephalopathy in diseases classified elsewhere
  • P91.819 — Neonatal encephalopathy, unspecified
  • P91.82 — Neonatal cerebral infarction
  • P91.821 — Neonatal cerebral infarction, right side of brain
  • P91.822 — Neonatal cerebral infarction, left side of brain
  • P91.823 — Neonatal cerebral infarction, bilateral
  • P91.88 — Other specified disturbances of cerebral status of newborn
  • P91.9 — Disturbance of cerebral status of newborn, unspecified

View all codes in the P91 family