Ernie Diaz Rivera, MD
Hematology & Oncology Physician · San Juan, PR
Ernie Diaz Rivera, MD is a hematology & oncology physician with a practice address in San Juan, Puerto Rico, and NPI 1992330831, issued on Mar 11, 2020. Check the license (Puerto Rico 23205, as entered in NPPES) with the Puerto Rico board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Ernie Diaz Rivera
- Credential
- MD
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- 23205 PR
Self-reported in NPPES; status is on the state search - Practice location
- PO Box 365067, San Juan, PR 00936
- Phone
- (787) 754-0101
- Enumerated
- Mar 11, 2020
- Record last updated
- Apr 16, 2024
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 134 in Puerto Rico → Look up another NPI →
Also registered at PO Box 365067
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Alexander AcevedoStudent in an Organized Health Care Education/Training Program1639972367
- Genesis Acevedo MangualStudent in an Organized Health Care Education/Training Program1164214573
- Alejandra Acevedo-MunizStudent in an Organized Health Care Education/Training Program1851235089
- Pablo Acosta GarayuaAnatomic Pathology & Clinical Pathology Physician1457853483
- Fabiola Acosta NunezStudent in an Organized Health Care Education/Training Program1629926399
- Ruth Adames-MendezDentist1639805492
Verify Ernie Diaz Rivera 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 23205Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
85% fewer Medicare Part D claims than the average hematology & oncology physician in 2024
131 Medicare Part D claims for 36 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of 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: $895.27
24 payments; by number, the most common kind was food and beverage; the largest payer was Amgen Inc. The 8,560 providers of this specialty with any payment received $7,481.41 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.
Ernie Diaz Rivera among 134 hematology & oncology physician records in Puerto Rico
Ernie Diaz Rivera, MD is one of 134 hematology & oncology physician records with a practice address in Puerto Rico. 91% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2020, is newer than over 99% of them.
- NPI issued2020 · over 99% of these records are older, 0% newer
- In a Medicare fileYes · 91% of these records are
- In the CMS Doctors and Clinicians fileNo · 73% of these records are
- Record last updated2024 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0003X and a Puerto Rico practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology & Oncology Physician providers in Puerto Rico
There are 134 hematology & oncology physician records in Puerto Rico.
All 134 in Puerto Rico → Every provider in San Juan → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Margarita Bruno-Padilla, M.D.Hato Rey, PR 009361639119357
- Omayra Gonzalez, MDSan Juan, PR 009361053304279
- Jose Lopez-PueblaSan Juan, PR 009361659828473
- Jose Abreu Arbelo, MDSan Juan, PR 009351851656441
- Eileen Pacheco - Hernandez, MDRio Piedras, PR 009351831107317
- Noridza Rivera-RodriguezSan Juan, PR 009351023210200
- Maribel Tirado-Gomez, MDSan Juan, PR 009351659303527
- Luis Baez Vallecillo, MDSan Juan, PR 009271265788855
Common questions
What is Ernie Diaz Rivera, MD's NPI number?
Ernie Diaz Rivera, MD's National Provider Identifier (NPI) is 1992330831, issued on Mar 11, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Ernie Diaz Rivera, MD located?
The NPPES record lists a practice address at PO Box 365067, San Juan, PR, 00936. Phone: (787) 754-0101. Providers update this record themselves, so call before visiting.
How can I verify Ernie Diaz Rivera, MD's license?
NPPES lists Puerto Rico license number 23205, as entered by the provider. Search the Puerto Rico board that licenses this profession; the NPPES record confirms identity only.
How much does Ernie Diaz Rivera, MD prescribe under Medicare Part D?
In 2024, Ernie Diaz Rivera, MD had 131 Medicare Part D claims for 36 beneficiaries; the average among hematology & oncology physician prescribers was 877. 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.