Maggie Marie Koenig, FNP
Family Nurse Practitioner · Chesterfield, MO
Maggie Marie Koenig, FNP is a family nurse practitioner with a practice address in Chesterfield, Missouri, and NPI 1497324230, issued on Jun 24, 2021. Check the license (Missouri 2021008237, as entered in NPPES) with the Missouri board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Maggie Marie Koenig
- Credential
- FNP
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License number
- 2021008237 MO
Self-reported in NPPES; status is on the state search - Practice location
- 15740 S Outer 40 RD, Chesterfield, MO 63017
- Phone
- (636) 237-4200
- Enumerated
- Jun 24, 2021
- Record last updated
- Jun 12, 2024
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 5,226 in Missouri → Look up another NPI →
Also registered at 15740 S Outer 40 RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Maggie Marie Koenig in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Missouri board licenses this profession
Search for license 2021008237Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
75% fewer Medicare Part D claims than the average family nurse practitioner in 2024
328 Medicare Part D claims for 216 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D.
Most prescribed
- Amlodipine Besylate27 claims
- Losartan Potassium25 claims
- Cephalexin18 claims
- Amoxicillin-Clavulanate Potass17 claims
- Paxlovid16 claims
- Levothyroxine Sodium15 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Maggie Marie Koenig among 5,226 family nurse practitioner records in Missouri
Maggie Marie Koenig, FNP is one of 5,226 family nurse practitioner records with a practice address in Missouri. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 72% of them.
- NPI issued2021 · 72% of these records are older, 22% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 64% of these records are
- Record last updated2024 · 44% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LF0000X and a Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
107 family nurse practitioner records list a practice address in Chesterfield
They are 107 of the 2,132 NPPES records with a practice address in Chesterfield, and 5,226 family nurse practitioner records in Missouri.
All 5,226 in Missouri → Every provider in Chesterfield → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- Patricia Abele, NPChesterfield, MO 630171265418057
- Merielle Bird, FNPChesterfield, MO 630171437477932
- Sarah Bloch, RN, MSN, FNPChesterfield, MO 630171043506256
- Maryellen Bowman, N.P.Chesterfield, MO 630171407938954
- Alysia Brown, APRN (NP-C)Chesterfield, MO 630171740416650
- Susan Ferbet, FNPChesterfield, MO 630171699720540
- Nichole Maclellan, FNPChesterfield, MO 630171043584634
- Lisa Mantia, FNP, BCChesterfield, MO 630171295924108
Common questions
What is Maggie Marie Koenig, FNP's NPI number?
Maggie Marie Koenig, FNP's National Provider Identifier (NPI) is 1497324230, issued on Jun 24, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Maggie Marie Koenig, FNP located?
The NPPES record lists a practice address at 15740 S Outer 40 RD, Chesterfield, MO, 63017. Phone: (636) 237-4200. Providers update this record themselves, so call before visiting.
How can I verify Maggie Marie Koenig, FNP's license?
NPPES lists Missouri license number 2021008237, as entered by the provider. Search the Missouri board that licenses this profession; the NPPES record confirms identity only.
How much does Maggie Marie Koenig, FNP prescribe under Medicare Part D?
In 2024, Maggie Marie Koenig, FNP had 328 Medicare Part D claims for 216 beneficiaries; the average among family nurse practitioner prescribers was 1,305. Part D covers Medicare prescriptions 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. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
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.