P04.42 – Newborn affected by maternal use of hallucinogens

ICD-10-CM 2027 diagnosis code · Newborn affected by maternal factors and by complications of pregnancy, labor, and delivery

Billable code

ICD-10-CM code P04.42

Code: P04.42 (claims format: P0442)
Description: Newborn affected by maternal use of hallucinogens
Billable: Yes – valid for HIPAA-covered transactions
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 16. Certain conditions originating in the perinatal period (P00-P96)
Block: P00-P04 Newborn affected by maternal factors and by complications of pregnancy, labor, and delivery
Parent codes: P04 › P04.4

Notes for P04.42

Excludes2 (not included here):

newborn affected by other maternal medication (P04.1-)

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

P04 – Newborn affected by noxious substances transmitted via placenta or breast milk

Includes:

nonteratogenic effects of substances transmitted via placenta

Excludes2 (not included here):

congenital malformations (Q00-Q99)
encounter for observation of newborn for suspected diseases and conditions ruled out (Z05.-)
neonatal jaundice from excessive hemolysis due to drugs or toxins transmitted from mother (P58.4)
newborn in contact with and (suspected) exposures hazardous to health not transmitted via placenta or breast milk (Z77.-)

Code first:

any current condition in newborn, if applicable

Block P00-P04

Notes:

These codes are for use when the listed maternal conditions are specified as the cause of confirmed morbidity or potential morbidity which have their origin in the perinatal period (before birth through the first 28 days after birth).

Index terms for P04.42

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in P04.4

Frequently asked questions

What is ICD-10 code P04.42?

P04.42 is the ICD-10-CM code for newborn affected by maternal use of hallucinogens, in the block P00-P04 (Newborn affected by maternal factors and by complications of pregnancy, labor, and delivery).

Is P04.42 a billable code?

Yes. P04.42 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does P04.42 belong to?

It belongs to category P04 – Newborn affected by noxious substances transmitted via placenta or breast milk.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.