P94.0 ICD-10-CM Code: Transient neonatal myasthenia gravis
HCC Buddy Code Card
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FY 2026 Apr update / Certain conditions originating in the perinatal period (P00-P96) / Other disorders originating in the perinatal period (P90-P96)
P94.0
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceTransient neonatal myasthenia gravis
A temporary condition where a newborn has muscle weakness similar to myasthenia gravis, usually caused by maternal antibodies, that typically resolves within days to weeks.
CMS-HCC V28
00
RAF 0
CMS-HCC V24
00
RAF 0
ACA/HHS
00
RAF 0
ESRD/PACE
00
RAF 0
RXHCC
00
RAF 0
Code Trumping
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Code Book Path
Inclusion Terms
OfficialICD-10-CM does not list inclusion terms for P94.0 in this effective period.
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for P94.0 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for P94.0 in this effective period.
Excludes 1
Official- myasthenia gravis (G70.0)
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for P94.0 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for P94.0 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for P94.0 in this effective period.
Buddy Documentation Tip
Last updated: FY2026 ICD-10-CM Apr update, Apr 1, 2026 through Sep 30, 2026. CMS-HCC V28 is 100% phased in for payment year 2026.
Is P94.0 an HCC code?
No. P94.0 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
Coder workflow notes
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This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).
What This Code Means
P94.0 is the ICD-10-CM diagnosis code for transient neonatal myasthenia gravis. A temporary condition where a newborn has muscle weakness similar to myasthenia gravis, usually caused by maternal antibodies, that typically resolves within days to weeks. P94.0 sits in the ICD-10-CM chapter for certain conditions originating in the perinatal period (p00-p96), within the section covering other disorders originating in the perinatal period (p90-p96).
P94.0 is a billable ICD-10-CM code but does not map to a payment HCC under the CMS-HCC V28, V24, ESRD, or RxHCC risk adjustment models. It can be reported on Medicare Advantage encounter data submissions but it does not contribute to a beneficiary's RAF score and therefore does not affect risk-adjusted payments to the plan.
This condition is transient and self-limiting; document the expected resolution timeline.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for P94.0 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •This condition is transient and self-limiting; document the expected resolution timeline
- •Verify maternal history of myasthenia gravis, as this is the primary cause
Excludes 1, Do NOT code together
- myasthenia gravis (G70.0)