ICD-10-CM 2027
ICD-10 code for extreme of newborn immaturity
From the official ICD-10-CM alphabetic index entry “Immaturity (less than 37 completed weeks) › extreme of newborn (less than 28 completed weeks of gestation) (less than 196 completed days of gestation) (unspecified weeks of gestation)”. Page updated September 29, 2026.
About coding extreme of newborn immaturity
The ICD-10-CM code for extreme of newborn immaturity is P07.20 (Extreme immaturity of newborn, unspecified weeks of gestation). The official index lists 6 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on P07.20.
Within P07.2, choose P07.20 (unspecified weeks of gestation) only when documentation doesn't support a more specific option: gestational age less than 23 completed weeks (P07.21), gestational age 23 completed weeks (P07.22), gestational age 24 completed weeks (P07.23), gestational age 25 completed weeks (P07.24), gestational age 26 completed weeks (P07.25) and gestational age 27 completed weeks (P07.26).
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 790 (Extreme Immaturity or Respiratory Distress Syndrome, Neonate, relative weight 6.0146), 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 extreme of newborn immaturity codes (official index)
- gestational age
- 23 completed weeks (23 weeks, 0 days through 23 weeks, 6 days) P07.22 — Extreme immaturity of newborn, gestational age 23 completed weeks
- 24 completed weeks (24 weeks, 0 days through 24 weeks, 6 days) P07.23 — Extreme immaturity of newborn, gestational age 24 completed weeks
- 25 completed weeks (25 weeks, 0 days through 25 weeks, 6 days) P07.24 — Extreme immaturity of newborn, gestational age 25 completed weeks
- 26 completed weeks (26 weeks, 0 days through 26 weeks, 6 days) P07.25 — Extreme immaturity of newborn, gestational age 26 completed weeks
- 27 completed weeks (27 weeks, 0 days through 27 weeks, 6 days) P07.26 — Extreme immaturity of newborn, gestational age 27 completed weeks
- less than 23 completed weeks P07.21 — Extreme immaturity of newborn, gestational age less than 23 completed weeks
Common questions about extreme of newborn immaturity ICD-10 codes
What is the ICD-10 code for extreme of newborn immaturity?
- P07.20 — Extreme immaturity of newborn, unspecified weeks of gestation. More specific codes apply when the documentation supports them: P07.22, P07.23, P07.24, P07.25 and others below.
Is P07.20 billable?
- Yes. P07.20 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can P07.20 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict P07.20 as a principal diagnosis.
Is P07.20 a CC or MCC?
- No. P07.20 is neither a CC nor an MCC under MS-DRG v44.0.