Gwyn Mahony Hadeed, D.O.
Family Medicine Physician · Saint Louis, MO
Gwyn Mahony Hadeed, D.O. is a family medicine physician with a practice address in Saint Louis, Missouri, and NPI 1023438231, issued on Apr 27, 2014. Check the license (Missouri 2022038658, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the Medicare figures below come from public CMS files.
- Name
- Gwyn Mahony Hadeed
- Credential
- D.O.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License numbers
- 2022038658 MO
DR.0059371 CO
TL0006017 CO
DO196254 OR
Self-reported in NPPES; status is on the state search - Practice location
- 401 Holly Hills Ave, Saint Louis, MO 63111
- Phone
- (314) 353-5190
- Enumerated
- Apr 27, 2014
- Record last updated
- Oct 4, 2022
- Fax
- (314) 353-7631
- Medicare enrollment
- Enrolled (PECOS I20200214000007); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 2,991 in Missouri → Look up another NPI →
Also registered at 401 Holly Hills Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Brian Braumiller, DOPsychiatry Physician1710181029
Verify Gwyn Mahony Hadeed in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMissouri Board of Registration for the Healing Arts
Search for license 2022038658Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
18% fewer Medicare Part D claims than the average family medicine physician in 2024
2,893 Medicare Part D claims for 286 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 37 claims were for opioids.
Most prescribed
- Atorvastatin Calcium160 claims
- Levothyroxine Sodium135 claims
- Losartan Potassium85 claims
- Trazodone Hcl79 claims
- Omeprazole78 claims
- Gabapentin76 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.
Bills Medicare through one group practice
- Salem HealthSalem, OR
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gwyn Mahony Hadeed among 2,991 family medicine physician records in Missouri
Gwyn Mahony Hadeed, D.O. is one of 2,991 family medicine physician 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 2014, is newer than 70% of them.
- NPI issued2014 · 70% of these records are older, 28% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2016 · median 2006 among the 1,778 with a school on file
- Record last updated2022 · 53% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Family Medicine Physician providers in Missouri
There are 2,991 family medicine physician records in Missouri.
All 2,991 in Missouri → Every provider in Saint Louis → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Esther Adade, MDSaint Louis, MO 631111245214162
- Jay Brieler, MDSaint Louis, MO 631111639129109
- Johnetta Craig, M.D.Saint Louis, MO 631111780668277
- Kanika Cunningham, M.D.Saint Louis, MO 631111174937189
- Theresa Drallmeier, M.D.Saint Louis, MO 631111467871137
- Christine Jacobs, MDSaint Louis, MO 631111316972169
- Elizabeth Keegan Garrett, MDSaint Louis, MO 631111992898290
- Ashley MeyrSaint Louis, MO 631111659735926
Common questions
What is Gwyn Mahony Hadeed, D.O.'s NPI number?
Gwyn Mahony Hadeed, D.O.'s National Provider Identifier (NPI) is 1023438231, issued on Apr 27, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Gwyn Mahony Hadeed, D.O. located?
The NPPES record lists a practice address at 401 Holly Hills Ave, Saint Louis, MO, 63111. Phone: (314) 353-5190. Providers update this record themselves, so call before visiting.
How can I verify Gwyn Mahony Hadeed, D.O.'s license?
NPPES lists Missouri license number 2022038658, 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.
How much does Gwyn Mahony Hadeed, D.O. prescribe under Medicare Part D?
In 2024, Gwyn Mahony Hadeed, D.O. had 2,893 Medicare Part D claims for 286 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.