2027 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 2027 (October 1, 2026 through September 30, 2027) 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 chloramphenicol adverse reaction. 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 2027.
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 2027.
Source: CMS Payment Year 2027 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.
- Chloramphenicol adverse reaction
- Drug reaction AND/OR intoxication specific to newborn
- Gray syndrome from chloramphenicol administration in newborn
- Newborn drug intoxication
- Newborn drug reaction
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to P93.0: its own notes plus those printed at P93 and 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.
- reactions and intoxications due to drugs administered to fetus affecting newborn
- 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.
- Grey syndrome from chloramphenicol administration in newborn
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
- jaundice due to drugs or toxins transmitted from mother or given to newborn (P58.4-)
- reactions and intoxications from maternal opiates, tranquilizers and other medication (P04.0-P04.1, P04.4-)
- withdrawal symptoms from maternal use of drugs of addiction (P96.1)
- withdrawal symptoms from therapeutic use of drugs in newborn (P96.2)
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.
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
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Read the full article at MedlinePlus
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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, 2026 through September 30, 2027.
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, 2026 through September 30, 2027.
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 793, 791, with relative weights from 4.1073 to 4.2192 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 2027. 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.
Can P93.0 be reported with a code from P58.4?
Not as a rule. The Excludes1 note at P93, which applies to P93.0, lists "jaundice due to drugs or toxins transmitted from mother or given to newborn (P58.4-)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).
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 2027. 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.
