Mireille El Hayek, M.D.
Endocrinology, Diabetes & Metabolism Physician · Saint Louis, MO
Mireille El Hayek, M.D. is an endocrinology, diabetes & metabolism physician with a practice address in Saint Louis, Missouri, and NPI 1912139940, issued on Aug 8, 2009. Check the license (Missouri 2015023837, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the Medicare figures below come from public CMS files.
- Name
- Mireille El Hayek
- Credential
- M.D.
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License numbers
- 2015023837 MO
036142174 IL
Self-reported in NPPES; status is on the state search - Practice location
- 2315 Dougherty Ferry Road, Saint Louis, MO 63122
- Phone
- (314) 965-9133
- Enumerated
- Aug 8, 2009
- Record last updated
- Oct 23, 2023
- Fax
- (314) 984-2793
- Medicare enrollment
- Enrolled (PECOS I20150911000585); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 206 in Missouri → Look up another NPI →
Verify Mireille El Hayek 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 2015023837Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
23% fewer Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
2,036 Medicare Part D claims for 210 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 50% of claims.
Most prescribed
- Levothyroxine Sodium215 claims
- Metformin Hcl Er135 claims
- Ozempic133 claims
- Jardiance103 claims
- Metformin Hcl103 claims
- Farxiga92 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.
Industry payments in 2024: $333.16
18 payments; by number, the most common kind was food and beverage; the largest payer was Novo Nordisk Inc. The 5,661 providers of this specialty with any payment received $5,742.15 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Endocrine Associates, LLCSaint Louis, MO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mireille El Hayek among 206 endocrinology, diabetes & metabolism physician records in Missouri
Mireille El Hayek, M.D. is one of 206 endocrinology, diabetes & metabolism physician records with a practice address in Missouri. 88% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 63% of them.
- NPI issued2009 · 63% of these records are older, 33% newer
- In a Medicare fileYes · 88% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated2007 · median 2003 among the 148 with a school on file
- Record last updated2023 · 45% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RE0101X and a Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Endocrinology, Diabetes & Metabolism Physician providers in Missouri
There are 206 endocrinology, diabetes & metabolism physician records in Missouri.
All 206 in Missouri → Every provider in Saint Louis → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Lamice El-Kholy, MDSaint Louis, MO 631171124139845
- George Griffing, MDSaint Louis, MO 631171265440135
- Megan Wood, M.D.St Louis, MO 631271407052996
- Bharathi Raju, MDSaint Louis, MO 631281720078843
- Fadi Siyam, M.D.Saint Louis, MO 631281558526574
- K. Thampy, M.D.Saint Louis, MO 631281205816790
- Nicole Ducharme, DOSaint Louis, MO 631291346208394
- Kathleen Lowe, MDSaint Louis, MO 631291639515315
Common questions
What is Mireille El Hayek, M.D.'s NPI number?
Mireille El Hayek, M.D.'s National Provider Identifier (NPI) is 1912139940, issued on Aug 8, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Mireille El Hayek, M.D. located?
The NPPES record lists a practice address at 2315 Dougherty Ferry Road, Saint Louis, MO, 63122. Phone: (314) 965-9133. Providers update this record themselves, so call before visiting.
How can I verify Mireille El Hayek, M.D.'s license?
NPPES lists Missouri license number 2015023837, 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 Mireille El Hayek, M.D. prescribe under Medicare Part D?
In 2024, Mireille El Hayek, M.D. had 2,036 Medicare Part D claims for 210 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. 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.