2026 ICD-10-CM Diagnosis Code P93.0Grey baby syndrome
ICD-10-CM Codes›P00–P96›P90-P96›P93
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- Risk Adjusts — HCC 137
- Not Chronic
P93.0 is a billable ICD-10-CM diagnosis code for grey baby syndrome. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 791, 793. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 4 closely related codes. Coders also document this condition as drug reaction AND/OR intoxication specific to newborn. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified perinatal conditions.
For Medicare Advantage risk adjustment, P93.0 maps to CMS-HCC Category 137 (Drug Use Disorder, Moderate/Severe, or Drug Use with Non-Psychotic Complications) under the V28 model, adding a risk factor of about 0.424 for a community, non-dual, aged beneficiary in payment year 2026.
Code Identity
Code Classification
Medicare Risk Adjustment (HCC)Billing
P93.0 maps to a payment category in the CMS-HCC model used to risk-adjust Medicare Advantage payments. Weights are the published community factors for payment year 2026.
Source: CMS Payment Year 2026 risk adjustment mappings and model software. Weights are relative factors, not dollar amounts; a beneficiary's total RAF also includes demographics and interactions. Browse all CMS-HCC categories.
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Drug reaction AND/OR intoxication specific to newborn
- Gray syndrome from chloramphenicol administration in newborn
- Newborn drug intoxication
- Newborn drug reaction
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Inclusion Terms
- Grey syndrome from chloramphenicol administration in newborn
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Gray syndrome (newborn) P93.0
Grey syndrome (newborn) P93.0
Syndrome See Also: Disease;
gray or grey (newborn) P93.0
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Antibiotics
Antibiotics are medicines that fight bacterial infections in people and animals. They work by killing the bacteria or by making it hard for the bacteria to grow and multiply.
The full article covers:
- What are antibiotics?
- What do antibiotics treat?
- Do antibiotics treat viral infections?
- What are the side effects of antibiotics?
- Why is it important to take antibiotics only when they're needed?
- How do I use antibiotics correctly?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert P93.0 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About P93.0Overview
What is the ICD-10 code for grey baby syndrome?
The ICD-10-CM code for grey baby syndrome is P93.0 (sometimes written as P930). It is billable on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
Is P93.0 a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report grey baby syndrome on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does P93.0 group to?
When grey baby syndrome is the principal diagnosis on an inpatient stay, it groups to MS-DRG 791, 793, with relative weights from 4.0590 to 4.1696 depending on complications. Higher weights mean higher Medicare reimbursement.
Is P93.0 a CC or MCC?
CMS lists P93.0 as a CC (complication or comorbidity) for FY 2026. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 4 closely related codes in its exclusion list.
What is the ICD-9 equivalent of P93.0?
Under the General Equivalence Mappings, grey baby syndrome converts to ICD-9-CM 779.4 (NB drug reaction/intoxic). The mapping is approximate, so confirm the match fits the documentation.
What HCC is P93.0?
P93.0 (grey baby syndrome) maps to CMS-HCC Category 137 (Drug Use Disorder, Moderate/Severe, or Drug Use with Non-Psychotic Complications), commonly written as HCC 137, in the CMS-HCC V28 model used for Medicare Advantage risk adjustment in payment year 2026. It does not map to any RxHCC in the Part D prescription drug model.
Does P93.0 risk-adjust for Medicare Advantage payment?
Yes. When documented and reported on a Medicare Advantage encounter, P93.0 adds a risk adjustment factor of about 0.424 to the beneficiary's RAF score for a community, non-dual, aged enrollee (published V28 weights range from 0.297 to 0.502 depending on the payment segment). A more severe related category (HCC 135 and HCC 136) supersedes it when both are reported. See the full factor table on the HCC 137 category page.
