Bhutani bilirubin nomogram + AAP phototherapy
Bhutani 1999 hour-specific bilirubin nomogram zone (40th/75th/95th percentile tracks) plus the AAP-2022 phototherapy threshold for the entered gestational age and neurotoxicity-risk flag, for newborns 35+ weeks.
Open the tool → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Age
- 48 hours
- Total serum bilirubin
- 14 mg/dL (canonical)
- Gestational age
- 38 weeks
Result: High-risk zone (>95th percentile); AAP-2022 phototherapy threshold 16 mg/dL for 38 wk.
The tool opens with these values already filled in. Replace them with your own.
What the result means
- Low-risk zone
- Below the 40th percentile on the hour-specific nomogram.
- Low-intermediate
- 40th to 75th percentile.
- High-intermediate
- 75th to 95th percentile; closer follow-up per source.
- High-risk zone
- Above the 95th percentile; higher likelihood of subsequent significant hyperbilirubinemia.
What you enter
- Age (hours)
- Total serum bilirubin
- Gestational age (weeks, 35-44)
- Neurotoxicity risk factor(s) present
How this is calculated
Bhutani VK, et al. Pediatrics. 1999;103(1):6-14 (hour-specific nomogram); AAP Clinical Practice Guideline, Kemper AR, et al. Pediatrics. 2022;150(3):e2022058859 (phototherapy thresholds). Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.