2027 ICD-10-CM Diagnosis Code P05.9Newborn affected by slow intrauterine growth, unspecified
ICD-10-CM Codes›P00–P96›P05-P08›P05
- Billable — Valid for Submission
- Not Chronic
P05.9 is a billable ICD-10-CM diagnosis code for newborn affected by slow intrauterine growth, unspecified. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 794. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Short gestation; low birth weight; and fetal growth retardation.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Café au lait spots
- Fetal growth restriction
- Insulin resistance
- Intrauterine growth restriction, congenital multiple café au lait macules, increased sister chromatid exchange syndrome
- Intrauterine growth restriction, metaphyseal dysplasia, adrenal hypoplasia congenita, and genital anomaly syndrome
- Intrauterine growth restriction, short stature, early adult-onset diabetes syndrome
- Intrauterine growth retardation, micrognathia, short stature, facial dysmorphism, rhizomelic shortening syndrome
- Malabsorption of glucose
- Neonatal polycythemia
- Neonatal polycythemia due to intra-uterine growth retardation
- Rhizomelia
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to P05.9: its own notes plus those printed at Chapter 16. A note printed at a category, block or chapter applies to every code under it.
Includes
Further defines, or gives examples of, the content of the category.
- conditions that have their origin in the fetal or perinatal period (before birth through the first 28 days after birth) even if morbidity occurs later
Applicable To
Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.
- Newborn affected by fetal growth retardation NOS
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
Notes
General instructions on how these codes are used.
- Codes from this chapter are for use on newborn records only, never on maternal records
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name P05.9, its category, or a range that includes it.
Excludes1 2
These codes carry an Excludes1 note naming P05.9: they are not reported together with it, unless the two conditions are unrelated.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Uncommon Infant and Newborn Problems
It can be scary when your baby is sick, especially when it is not an everyday problem like a cold or a fever. You may not know whether the problem is serious or how to treat it. If you have concerns about your baby's health, call your health care provider right away.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert P05.9 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About P05.9Overview
What is the ICD-10 code for newborn affected by slow intrauterine growth, unspecified?
The ICD-10-CM code for newborn affected by slow intrauterine growth, unspecified is P05.9 (sometimes written as P059). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is P05.9 a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report newborn affected by slow intrauterine growth, unspecified on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does P05.9 group to?
When newborn affected by slow intrauterine growth, unspecified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 794 (neonate with Other Significant Problems), which carries a relative weight of 1.4934. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of P05.9?
Under the General Equivalence Mappings, newborn affected by slow intrauterine growth, unspecified converts to ICD-9-CM 764.90 (fet growth retard wtNOS). The mapping is approximate, so confirm the match fits the documentation.
