NPPES file of Aug 9, 2026

Cyrene D. Grothaus-Day, MD

Pediatric Anesthesiology Physician · Fenton, MO

Cyrene D. Grothaus-Day, MD is a pediatric anesthesiology physician with a practice address in Fenton, Missouri, and NPI 1407872625, issued on Jul 14, 2006. Check the license (Missouri 2003019558, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1407872625
Name
Cyrene D. Grothaus-Day
Credential
MD
Primary taxonomy
Pediatric Anesthesiology Physician 207LP3000X
License numbers
2003019558 MO
036-126419 IL
Self-reported in NPPES; status is on the state search
Practice location
1378 Mosswoods Dr, Fenton, MO 63026
Phone
(636) 861-1676
Enumerated
Jul 14, 2006
Record last updated
Sep 8, 2025
Medicaid IDs
204893622 MO
036126419 IL
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
Download card Updates feed

8 nearest pediatric anesthesiology physician records → All 97 in Missouri → Look up another NPI →

Verify Cyrene D. Grothaus-Day in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMissouri Board of Registration for the Healing Arts
    Search for license 2003019558    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Missouri license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

Is this page about you? You can ask us to correct, restrict or remove it: how.

Industry payments in 2024: $21.13

1 payment: food and beverage; the largest payer was Janssen Biotech, Inc. The 461 providers of this specialty with any payment received $289.08 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Cyrene Grothaus-Day$21.13
  2. Specialty average$289.08

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Cyrene D. Grothaus-Day among 97 pediatric anesthesiology physician records in Missouri

Cyrene D. Grothaus-Day, MD is one of 97 pediatric anesthesiology physician records with a practice address in Missouri. 87% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 0% of them.

  • NPI issued2006 · 0% of these records are older, 77% newer
  • In a Medicare fileYes · 87% of these records are
  • In the CMS Doctors and Clinicians fileNo · 66% of these records are
  • Record last updated2025 · 24% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207LP3000X and a Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Pediatric Anesthesiology Physician providers in Missouri

There are 97 pediatric anesthesiology physician records in Missouri.

All 97 in Missouri → Every provider in Fenton → Pediatric Anesthesiology Physician nationwide →

The 8 pediatric anesthesiology physician records with the nearest ZIP codes

  1. Michelle Marino, M.D.Saint Louis, MO 631041346466091
  2. Andrew Oster, M.D.Saint Louis, MO 631041508200775
  3. Kelly Chilson, MDSaint Louis, MO 631101699734582
  4. Russell Groener, MDSaint Louis, MO 631101245258706
  5. Catherine Krucylak, MDSaint Louis, MO 631101760409270
  6. Scott Markowitz, MDSaint Louis, MO 631101801901186
  7. Joan Niehoff, MDSaint Louis, MO 631101619995313
  8. Dolores Njoku, MDSaint Louis, MO 631101700838711

Common questions

What is Cyrene D. Grothaus-Day, MD's NPI number?

Cyrene D. Grothaus-Day, MD's National Provider Identifier (NPI) is 1407872625, issued on Jul 14, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Cyrene D. Grothaus-Day, MD located?

The NPPES record lists a practice address at 1378 Mosswoods Dr, Fenton, MO, 63026. Phone: (636) 861-1676. Providers update this record themselves, so call before visiting.

How can I verify Cyrene D. Grothaus-Day, MD's license?

NPPES lists Missouri license number 2003019558, as entered by the provider. Search the Missouri Board of Registration for the Healing Arts at https://www.fsmb.org/contact-a-state-medical-board/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.