Marianne Hernandez, MD
Endocrinology, Diabetes & Metabolism Physician · San Sebastian, PR
Marianne Hernandez, MD is an endocrinology, diabetes & metabolism physician with a practice address in San Sebastian, Puerto Rico, and NPI 1861669178, issued on May 15, 2008. Check the license (Puerto Rico 17121, as entered in NPPES) with the Puerto Rico board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Marianne Hernandez
- Credential
- MD
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License number
- 17121 PR
Self-reported in NPPES; status is on the state search - Practice location
- Ave Hostos #11, San Sebastian, PR 00685
- Phone
- (787) 643-4257
- Enumerated
- May 15, 2008
- Record last updated
- Aug 6, 2018 (not updated in 8 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20080926000263); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 144 in Puerto Rico → Look up another NPI →
Verify Marianne Hernandez in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Puerto Rico board licenses this profession
Search for license 17121Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
33% more Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
3,492 Medicare Part D claims for 337 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 75% of claims.
Most prescribed
- Synthroid363 claims
- Mounjaro306 claims
- Ozempic267 claims
- Trulicity194 claims
- Atorvastatin Calcium151 claims
- Soliqua 100-33145 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: $421.20
20 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
- Clinica Las Americas Guaynabo, IncBayamon, PR
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Marianne Hernandez among 144 endocrinology, diabetes & metabolism physician records in Puerto Rico
Marianne Hernandez, MD is one of 144 endocrinology, diabetes & metabolism physician records with a practice address in Puerto Rico. 97% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 42% of them.
- NPI issued2008 · 42% of these records are older, 51% newer
- In a Medicare fileYes · 97% of these records are
- In the CMS Doctors and Clinicians fileYes · 83% of these records are
- Graduated2002 · median 2007 among the 119 with a school on file
- Record last updated2018 · 47% 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 Puerto Rico 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 Puerto Rico
There are 144 endocrinology, diabetes & metabolism physician records in Puerto Rico.
All 144 in Puerto Rico → Every provider in San Sebastian → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Obed Perez-Gonzalez, MDSan German, PR 006831255420444
- Suzette Toro, M.D.San German, PR 006831255434320
- David Lopez RodriguezMayaguez, PR 006821295343267
- Denise Caro, M.D.Mayaguez, PR 006801134221724
- Dannel Diaz Ruiz, MDMayaguez, PR 006801679066435
- Jose Gandara, MDMayaguez, PR 006801518963008
- Coral Jimenez Rovira, MDMayaguez, PR 006801326665746
- Carlos Martinez Rivera, MDMayaguez, PR 006801356330310
Common questions
What is Marianne Hernandez, MD's NPI number?
Marianne Hernandez, MD's National Provider Identifier (NPI) is 1861669178, issued on May 15, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Marianne Hernandez, MD located?
The NPPES record lists a practice address at Ave Hostos #11, San Sebastian, PR, 00685. Phone: (787) 643-4257. Providers update this record themselves, so call before visiting.
How can I verify Marianne Hernandez, MD's license?
NPPES lists Puerto Rico license number 17121, as entered by the provider. Search the Puerto Rico board that licenses this profession; the NPPES record confirms identity only.
How much does Marianne Hernandez, MD prescribe under Medicare Part D?
In 2024, Marianne Hernandez, MD had 3,492 Medicare Part D claims for 337 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.