NPPES file of Aug 9, 2026

Margaret Claire Krenn, NNP

Neonatal Nurse Practitioner · Saint Louis, MO

Margaret Claire Krenn, NNP is a neonatal nurse practitioner with a practice address in Saint Louis, Missouri, and NPI 1801370424, issued on Sep 19, 2018. Check the license (Missouri 2018029010, as entered in NPPES) with the Missouri board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.

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

NPPES recordNPPES file of Aug 9, 2026
1801370424
Name
Margaret Claire Krenn
Credential
NNP
Primary taxonomy
Neonatal Nurse Practitioner 363LN0000X
License numbers
2018029010 MO
2004007033 MO
Self-reported in NPPES; status is on the state search
Practice location
621 S New Ballas RD Ste 2016B, Saint Louis, MO 63141
Phone
(314) 251-6450
Enumerated
Sep 19, 2018
Record last updated
Sep 19, 2018 (not updated in 8 years: call before relying on the address or phone)
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.
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Also registered at 621 S New Ballas RD Ste 2016B

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Gregory Booth, M.D.Neonatal-Perinatal Medicine Physician1801007018
  2. James Carroll, M.D.Neonatal-Perinatal Medicine Physician1144600016

Verify Margaret Claire Krenn in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Missouri board licenses this profession
    Search for license 2018029010    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
Find the Missouri license search

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Neonatal Nurse Practitioner providers in Missouri

There are 203 neonatal nurse practitioner records in Missouri. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 203 in Missouri → Every provider in Saint Louis →

Other neonatal nurse practitioner records in Missouri

  1. Kristin Aaron, APRN, NNP-BCKansas City, MO1932694569
  2. Nia Aragon, NNPColumbia, MO1205381019
  3. Jennifer Armstrong, RNKansas City, MO1851919591
  4. Bernice Averill, RNKansas City, MO1144288473
  5. Kailey Bates, APRNKansas City, MO1063334985
  6. Virginia Bauler, RNKansas City, MO1144288309
  7. Jessica Baumgarten, APRNKansas City, MO1598322380
  8. Addie Begley, NNPKansas City, MO1902159395
  9. Rebecca Bernard, NNPKansas City, MO1457820292
  10. Elizabeth BestSaint Louis, MO1659823821

Common questions

What is Margaret Claire Krenn, NNP's NPI number?

Margaret Claire Krenn, NNP's National Provider Identifier (NPI) is 1801370424, issued on Sep 19, 2018. An NPI identifies a provider in billing; it is not a license.

Where is Margaret Claire Krenn, NNP located?

The NPPES record lists a practice address at 621 S New Ballas RD Ste 2016B, Saint Louis, MO, 63141. Phone: (314) 251-6450. Providers update this record themselves, so call before visiting.

How can I verify Margaret Claire Krenn, NNP's license?

NPPES lists Missouri license number 2018029010, as entered by the provider. Search the Missouri board that licenses this profession; the NPPES record confirms identity only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. 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.