Margaret Mary Wynn, FNP-C
Family Nurse Practitioner · Chesterfield, MO
Margaret Mary Wynn, FNP-C is a family nurse practitioner with a practice address in Chesterfield, Missouri, and NPI 1306306865, issued on Mar 21, 2019. Check the license (Missouri 2018027826, as entered in NPPES) with the Missouri board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Margaret Mary Wynn
- Credential
- FNP-C
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License number
- 2018027826 MO
Self-reported in NPPES; status is on the state search - Practice location
- 15740 South Outer Road, Chesterfield, MO 63017
- Phone
- (636) 237-4200
- Enumerated
- Mar 21, 2019
- Record last updated
- May 14, 2019 (not updated in 7 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 5,226 in Missouri → Look up another NPI →
Verify Margaret Mary Wynn in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Missouri board licenses this profession
Search for license 2018027826Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
69% fewer Medicare Part D claims than the average family nurse practitioner in 2024
408 Medicare Part D claims for 149 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D.
Most prescribed
- Amlodipine Besylate45 claims
- Spironolactone38 claims
- Jardiance29 claims
- Bumetanide22 claims
- Losartan Potassium17 claims
- Lisinopril14 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.
Margaret Mary Wynn among 5,226 family nurse practitioner records in Missouri
Margaret Mary Wynn, FNP-C 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 2019, is newer than 59% of them.
- NPI issued2019 · 59% of these records are older, 34% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 64% of these records are
- Record last updated2019 · 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 Margaret Mary Wynn, FNP-C's NPI number?
Margaret Mary Wynn, FNP-C's National Provider Identifier (NPI) is 1306306865, issued on Mar 21, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Margaret Mary Wynn, FNP-C located?
The NPPES record lists a practice address at 15740 South Outer Road, Chesterfield, MO, 63017. Phone: (636) 237-4200. Providers update this record themselves, so call before visiting.
How can I verify Margaret Mary Wynn, FNP-C's license?
NPPES lists Missouri license number 2018027826, as entered by the provider. Search the Missouri board that licenses this profession; the NPPES record confirms identity only.
How much does Margaret Mary Wynn, FNP-C prescribe under Medicare Part D?
In 2024, Margaret Mary Wynn, FNP-C had 408 Medicare Part D claims for 149 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.