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ICD-10-CM 2027 diagnosis code

P05.1Newborn small for gestational age

Not billable — use a more specific code

P05.1 is a header code, so it can't be reported by itself. Choose one of the 10 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About P05.1

P05.1 is the ICD-10-CM diagnosis code for newborn small for gestational age. It belongs to category P05 (disorders of newborn related to slow fetal growth and fetal malnutrition), block P05-P08 (disorders of newborn related to length of gestation and fetal growth) and chapter 16 (certain conditions originating in the perinatal period). It is a header code, so it can't be reported by itself; one of its 10 subcodes must be used instead.

Within P05 (disorders of newborn related to slow fetal growth and fetal malnutrition), P05.1 is specifically for newborn small for gestational age. Related codes cover light for gestational age (P05.0), affected by fetal (intrauterine) malnutrition not light or small for gestational age (P05.2) and affected by slow intrauterine growth, unspecified (P05.9).

To report this condition, pick the subcode that matches the documentation: P05.10 (unspecified weight), P05.11 (less than 500 grams), P05.12 (500-749 grams), P05.13 (750-999 grams), P05.14 (1000-1249 grams), P05.15 (1250-1499 grams), P05.16 (1500-1749 grams), P05.17 (1750-1999 grams) and 2 more.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under P05.1

Coding notes

Applicable toConditions and synonyms classified to this code
  • Newborn small-and-light-for-dates
  • Newborn small-for-dates
  • Weight and length below 10th percentile for gestational age

Notes that apply from higher levels

Instructions written at a parent level also apply to P05.1.

Broader instructions also apply from Chapter 16: Certain conditions originating in the perinatal period.

Alphabetic index entries

1 entries

Terms in the official ICD-10-CM index that lead to P05.1.

Codes whose notes reference P05.1

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about P05.1

Is P05.1 billable?

No. P05.1 is a header code. Report one of its more specific subcodes instead.