ICD-10-CM 2027
ICD-10 code for Light-for-dates
From the official ICD-10-CM alphabetic index entry “Light-for-dates (infant)”. Page updated September 29, 2026.
About coding Light-for-dates
The ICD-10-CM code for Light-for-dates is P05.00 (Newborn light for gestational age, unspecified weight). The official index lists 11 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on P05.00.
Within P05.0, choose P05.00 (unspecified weight) only when documentation doesn't support a more specific option: less than 500 grams (P05.01), 500-749 grams (P05.02), 750-999 grams (P05.03), 1000-1249 grams (P05.04), 1250-1499 grams (P05.05), 1500-1749 grams (P05.06), 1750-1999 grams (P05.07), 2000-2499 grams (P05.08) and 1 more.
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 794 (Neonate with Other Significant Problems, relative weight 1.4935), 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.
More specific Light-for-dates codes (official index)
- with weight of
- 499 grams or less P05.01 — Newborn light for gestational age, less than 500 grams
- 500-749 grams P05.02 — Newborn light for gestational age, 500-749 grams
- 750-999 grams P05.03 — Newborn light for gestational age, 750-999 grams
- 1000-1249 grams P05.04 — Newborn light for gestational age, 1000-1249 grams
- 1250-1499 grams P05.05 — Newborn light for gestational age, 1250-1499 grams
- 1500-1749 grams P05.06 — Newborn light for gestational age, 1500-1749 grams
- 1750-1999 grams P05.07 — Newborn light for gestational age, 1750-1999 grams
- 2000-2499 grams P05.08 — Newborn light for gestational age, 2000-2499 grams
- 2500 grams and over P05.09 — Newborn light for gestational age, 2500 grams and over
- specified NEC P05.09 — Newborn light for gestational age, 2500 grams and over
- and small-for-dates
- affecting management of pregnancy O36.59 — Maternal care for other known or suspected poor fetal growth
Common questions about Light-for-dates ICD-10 codes
What is the ICD-10 code for Light-for-dates?
- P05.00 — Newborn light for gestational age, unspecified weight. More specific codes apply when the documentation supports them: P05.01, P05.02, P05.03, P05.04 and others below.
Is P05.00 billable?
- Yes. P05.00 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can P05.00 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict P05.00 as a principal diagnosis.
Is P05.00 a CC or MCC?
- No. P05.00 is neither a CC nor an MCC under MS-DRG v44.0.