2026 ICD-10-CM Diagnosis Code P09.4Abnormal findings on neonatal screening for cystic fibrosis

ICD-10-CM Codes›P00–P96›P09›P09

ICD-10-CM P09.4
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

P09.4 is a billable ICD-10-CM diagnosis code for abnormal findings on neonatal screening for cystic fibrosis. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 947 through 948. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Cystic fibrosis and Other specified and unspecified perinatal conditions.

Code Identity

ICD-10-CM Code
P09.4
Billable Status
Yes — Valid for Submission
Code Describes
Abnormal findings on neonatal screening for cystic fibrosis
Short Description
Abnormal findings on neonatal screening for cystic fibrosis
Same as the full description in the CMS dataset.
Parent Code
P09
Abnormal findings on neonatal screening

Code Classification

ChapterP00–P96Certain conditions originating in the perinatal period
SectionP09Abnormal findings on neonatal screening
CategoryP09Abnormal findings on neonatal screening
This CodeP09.4Abnormal findings on neonatal screening for cystic fibrosis

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Abnormal, abnormality, abnormalities
      • neonatal screening
        • for
          • cystic fibrosis

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR END012
Cystic fibrosis
Default principal diagnosis: inpatient No · outpatient No
CCSR PNL013
Other specified and unspecified perinatal conditions
Default principal diagnosis: inpatient Yes · outpatient Yes

Code History & ChangesHistory

Replacement P09.4 replaces the following previously assigned code(s):

  • P09 - Abnormal findings on neonatal screening
FY 2022AddedAdded to the ICD-10-CM code setEffective October 1, 2021.
FY 2023–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About P09.4Overview

Is P09.4 (Abnormal findings on neonatal screening) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report abnormal findings on neonatal screening for cystic fibrosis on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does P09.4 group to?

When abnormal findings on neonatal screening for cystic fibrosis is the principal diagnosis on an inpatient stay, it groups to MS-DRG 947, 948, with relative weights from 0.8005 to 1.2694 depending on complications. Higher weights mean higher Medicare reimbursement.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.