P07.39 Preterm newborn, gestational age 36 completed weeks

ICD-10-CM P07.39: Preterm newborn, gestational age 36 completed weeks

ICD-10-CM code P07.39 identifies a preterm newborn with a gestational age of 36 completed weeks. This diagnosis code is part of a specific ICD-10-CM sequence that distinguishes preterm newborns by their exact completed week of gestation. The supplied sources establish the code's definition and list it alongside adjacent gestational age codes, while broader clinical literature discusses the historical terminology and health needs of late preterm infants. 3 1

What this code represents

ICD-10-CM code P07.39 represents a preterm newborn with a gestational age of 36 completed weeks. This code is listed among a sequence of specific diagnoses that classify preterm newborns by their exact completed week of gestation. 3

Coding details

Code P07.39 is situated within a contiguous ICD-10-CM numerical hierarchy that assigns distinct codes to each completed week of preterm gestation, ranging from P07.31 for 28 weeks through P07.38 for 35 weeks. 3

Plain-language overview

Clinical literature indicates that the term 'near-term' was suggested to be abandoned because it did not adequately reflect the immaturity of preterm infants and implied a greater degree of development than was appropriate. 1

Clinical context

Compared with infants born at term, late preterm infants have additional health-care needs and more hospital admissions during childhood, with infants born at 35 weeks' gestation accounting for a substantial percentage of total preterm readmission costs. 1

Documentation considerations

The ICD-10-CM coding structure for preterm newborns provides distinct codes for each completed week of gestation, establishing that the specific gestational week is the defining element differentiating these diagnoses. 3

What the sources add

While the clinical reference provides the exact ICD-10-CM code and label for a 36-week preterm newborn, the clinical literature explains the historical shift away from using the term 'near-term' due to it understating infant immaturity. 3 1

Coverage and utilization context

Research indicates that preterm infants have increased postdischarge health-care service utilization, and the ongoing health-care costs for infants with long-term problems in the late preterm gestational age group might be substantial. 1

Sources

1. Bookshelf — ncbi.nlm.nih.gov; accessed 2026-07-26.
2. Bookshelf — ncbi.nlm.nih.gov; accessed 2026-07-26.
3. Burden of Comorbidities and Healthcare Resource ... — jheor.org; accessed 2026-07-26.