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ICD-10-CM P39.8: Other specified infections specific to the perinatal period

P39.8 is the billable ICD-10-CM code for other specified infections specific to the perinatal period, in category P39 (Other infections specific to the perinatal period) of the Infections specific to the perinatal period section. As a principal diagnosis it groups to MS-DRG 791 Prematurity with Major Problems, MS-DRG 793 Full Term Neonate with Major Problems (MDC 15 MDC 15: Newborns and Other Neonates with Conditions Originating in Perinatal Period). As a secondary diagnosis it is a CC, excluded with 46 principal diagnoses. 2 LCD billing and coding articles list it as covered.

Compiled from CMS files by the QuickIntell RCM Editorial Team · Data effective · Method: reference methodology · Report a data correction

Data currency: ICD-10-CM code descriptions: FY2027 (effective October 1, 2026); IPPS Table 5 (MS-DRG weights): v44 FY2027 (final rule + CN3) (effective October 1, 2026); ICD-10-CM to HCC mapping: PY2027 initial ICD-10-CM mappings (dates of service 2026) (payment year 2027); Medicare Coverage Database billing and coding articles: MCD release October 8, 2026 (effective October 4, 2026). Next CMS release: FY2028 code files, effective October 1, 2027 for the ICD-10-CM code descriptions; FY2028 final rule (August 2027), effective October 1, 2027; an April 1 interim grouper update when CMS issues one for the IPPS Table 5 (MS-DRG weights); PY2028 advance notice (February 2027) and the PY2027 midyear final mapping (spring 2027) for the ICD-10-CM to HCC mapping; weekly, every Thursday for the Medicare Coverage Database billing and coding articles.

Code
P39.8
billable FY2027 ICD-10-CM code
Category
P39 Other infections specific to the perinatal period
Chapter
16: Certain conditions originating in the perinatal period (P00-P96)
CC/MCC (MS-DRG v44)
CC
CMS-HCC V28
Not mapped
POA reporting
Required

Tabular list notes for P39.8

The tabular list has no notes on P39.8 itself; the notes below apply from its parent headings.

Inherited from P39 (Other infections specific to the perinatal period)

Use additional code
  • code to identify organism or specific infection

MS-DRG grouping when P39.8 is the principal diagnosis

MS-DRG v44 groups for P39.8 as principal diagnosis
MDCMS-DRGs
15 MDC 15: Newborns and Other Neonates with Conditions Originating in Perinatal Period791793

The final group also depends on procedures, secondary diagnoses and discharge status; the MS-DRG lookup for P39.8 shows the full grouping logic.

CC/MCC status and inpatient edits

As a secondary diagnosis, P39.8 is a CC under MS-DRG v44, unless the principal diagnosis is one of the 46 codes in its exclusion list. Check P39.8 against a principal diagnosis.

  • Present on admission: a POA indicator is required on inpatient claims.

CMS-HCC V28 risk adjustment

P39.8 does not map to a payment HCC in the PY2027 CMS-HCC V28 model, so on its own it does not change a Medicare Advantage risk score.

LCD billing and coding articles that list P39.8

2 current Medicare billing and coding articles list P39.8 among the diagnoses that support medical necessity for the services they cover.

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Frequently asked questions

What does ICD-10-CM P39.8 mean?

P39.8 means other specified infections specific to the perinatal period. It is one of 7 billable codes under P39, other infections specific to the perinatal period.

Which MS-DRG does P39.8 group to?

As the principal diagnosis, P39.8 groups to MS-DRG 791 Prematurity with Major Problems, MS-DRG 793 Full Term Neonate with Major Problems (MDC 15 MDC 15: Newborns and Other Neonates with Conditions Originating in Perinatal Period) under MS-DRG v44, before procedures and secondary diagnoses are applied.

Is P39.8 a CC or MCC?

P39.8 is a CC under MS-DRG v44; 46 principal diagnoses exclude it.

Sources

Every figure on this page is taken from the CMS publications below, as released by the Centers for Medicare & Medicaid Services. Projection built 2026-10-10. Verify against the primary file before billing or contracting decisions. The reference methodology explains how each figure is computed from these files.

Disclaimer

The descriptor and notes are reproduced from the FY2027 ICD-10-CM files; MS-DRG, CC/MCC and HCC facts come from the CMS FY2027 and PY2027 tables. Code from the medical record and the ICD-10-CM Official Guidelines. Not legal, clinical or billing advice.

Found a figure that does not match the CMS file? Report a data correction with the CMS file and the value you expected; the request reaches the editorial team through the contact form.