P07.3 Preterm [premature] newborn [other]

ICD-10-CM Code P07.3: Preterm [premature] newborn [other]

ICD-10-CM code P07.3 designates a preterm newborn with a gestational age of 28 completed weeks or more. The code is part of a category that distinguishes newborns by specific completed weeks of gestation. Preterm infants face elevated risks for developmental disabilities and long-term chronic conditions. This reference outlines what public sources establish about the clinical and coding context of this diagnosis. 2 3 4

Plain-language overview

A preterm newborn is defined as an infant born with a gestational age below 37 weeks. These infants face a higher risk of developmental disabilities, including cerebral palsy, and long-term adult-onset chronic conditions such as cardiovascular disease. 2

What this code represents

Code P07.3 represents a preterm newborn with a gestational age of 28 completed weeks or more. This category includes newborns delivered vaginally at 28 weeks and distinguishes them from newborns classified as having extreme immaturity. 3

Coding details

The P07.3 category includes specific billable codes that correspond to the exact completed weeks of gestation. These specific codes range from P07.31 for 28 completed weeks to P07.39 for 36 completed weeks, alongside an unspecified code P07.30. 4

Documentation considerations

Clinical reference materials categorize newborns delivered before full term as either immature or premature based on birth weight and gestational age. Codes for preterm newborns, such as those in the P07.3 category, may be used alongside codes for newborns light for gestational age. 3

Clinical context

Public health information categorizes preterm births into very preterm, moderate preterm, and late preterm groups. These categories span gestations from 28 to 36 weeks, and preterm survivors face cumulative medical, developmental, and social risks that impact long-term adult health and educational attainment. 1

Coverage and utilization context

Estimates indicate that medical care costs for premature and low-birth-weight infants average $54,149 during the first year of life. This financial burden is approximately twelve times higher than the payments for an uncomplicated newborn. 1

What the sources add

Clinical guidelines establish that care for preterm infants is a global priority from birth to 24 months of age. In contrast, payer guidance provides an operational breakdown of exact gestational weeks used to organize ICD-10-CM codes within the P07.3 category. 2 4

Public health literature identifies poverty and inequality as significant contributors to preterm births and related health disparities. Meanwhile, clinical coding references focus on the gestational age thresholds that define the P07.3 diagnostic category. 1 3

Sources

1. Bookshelf — ncbi.nlm.nih.gov; accessed 2026-07-25.
2. Bookshelf — ncbi.nlm.nih.gov; accessed 2026-07-25.
3. Chapter 16 Conditions Originating in the Perinatal Period ... — cdpho.org; accessed 2026-07-25.
4. Guidance on Documentation and Coding for Premature ... — wellcare.com; accessed 2026-07-25.