NPPES file of Aug 9, 2026

Herminio Frontera, M.D.

Geriatric Medicine (Internal Medicine) Physician · San Juan, PR

Herminio Frontera, M.D. is a geriatric medicine (internal medicine) physician with a practice address in San Juan, Puerto Rico, and NPI 1528126505, issued on Dec 4, 2006. Check the license (Puerto Rico 5893, as entered in NPPES) with the Puerto Rico board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1528126505
Name
Herminio Frontera
Credential
M.D.
Primary taxonomy
Geriatric Medicine (Internal Medicine) Physician 207RG0300X
License number
5893 PR
Self-reported in NPPES; status is on the state search
Practice location
735 Ave Ponce DE Leon Ste 814, San Juan, PR 00917
Phone
(787) 764-4110
Enumerated
Dec 4, 2006
Record last updated
Aug 3, 2021 (not updated in 5 years: call before relying on the address or phone)
Fax
(787) 758-1525
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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Verify Herminio Frontera in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Puerto Rico board licenses this profession
    Search for license 5893    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the Puerto Rico license search

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17% fewer Medicare Part D claims than the average geriatric medicine (internal medicine) physician in 2024

3,509 Medicare Part D claims for 237 beneficiaries, against an average of 4,246 among the 3,116 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims.

  1. Herminio Frontera3,509
  2. Specialty average4,246

Most prescribed

  1. Losartan Potassium208 claims
  2. Metoprolol Succinate147 claims
  3. Atorvastatin Calcium140 claims
  4. Levothyroxine Sodium138 claims
  5. Metformin Hcl130 claims
  6. Rosuvastatin Calcium130 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.

Geriatric Medicine (Internal Medicine) Physician providers in Puerto Rico

There are 21 geriatric medicine (internal medicine) physician records in Puerto Rico.

All 21 in Puerto Rico → Every provider in San Juan →

Other geriatric medicine (internal medicine) physician records in Puerto Rico

  1. Isabel Alamo, M.D.Humacao, PR1841288230
  2. Daisy Baez-Franceschi, M.D.Guaynabo, PR1053379065
  3. Maritza Carrasquillo, M.D.San Juan, PR1609810258
  4. Jose Colon Rivera, MDCanovanas, PR1356904304
  5. Pedro Gil De Rubio Cruz, MDCarolina, PR1770960163
  6. Juanita Hernandez, MDLas Piedras, PR1265586200
  7. Ivonne Jimenez-Velazquez, MD, FACPCarolina, PR1407974546
  8. Faudes Lugo Morales, M.D.Cabo Rojo, PR1386180644
  9. William Marrero Ortiz, MDSan Juan, PR1619418027
  10. Ruth Martinez-Camacho, MDMayaguez, PR1093985160

Common questions

What is Herminio Frontera, M.D.'s NPI number?

Herminio Frontera, M.D.'s National Provider Identifier (NPI) is 1528126505, issued on Dec 4, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Herminio Frontera, M.D. located?

The NPPES record lists a practice address at 735 Ave Ponce DE Leon Ste 814, San Juan, PR, 00917. Phone: (787) 764-4110. Providers update this record themselves, so call before visiting.

How can I verify Herminio Frontera, M.D.'s license?

NPPES lists Puerto Rico license number 5893, as entered by the provider. Search the Puerto Rico board that licenses this profession; the NPPES record confirms identity only.

How much does Herminio Frontera, M.D. prescribe under Medicare Part D?

In 2024, Herminio Frontera, M.D. had 3,509 Medicare Part D claims for 237 beneficiaries; the average among geriatric medicine (internal medicine) physician prescribers was 4,246. 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.