Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. Cyrene D Grothaus-Day, MD

Individual provider Pediatric Anesthesiology Physician · NPI 1407872625

Dr. Cyrene D Grothaus-Day, MD is a Pediatric Anesthesiology Physician in Fenton, Missouri. Licensed in Illinois and Missouri. Registered with an NPI since 2006.

Licensed in
IL, MO
In the registry since
2006
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

1378 Mosswoods Dr
Fenton, MO 63026-7226
Phone: (636) 861-1676
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Pediatric Anesthesiology Physician (primary) Taxonomy 207LP3000X · Licence 2003019558 (MO)
Pediatric Anesthesiology Physician Taxonomy 207LP3000X · Licence 036-126419 (IL)

Record details

NPI number1407872625
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 14, 2006
Last updated in NPPESSeptember 8, 2025
Certification dateSeptember 8, 2025