Maria Eloisa Perez Grau, MD
Hematology & Oncology Physician · San Juan, PR
Maria Eloisa Perez Grau, MD is a hematology & oncology physician with a practice address in San Juan, Puerto Rico, and NPI 1821065855, issued on Mar 8, 2006. Check the license (Puerto Rico 13570, as entered in NPPES) with the Puerto Rico board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Maria Eloisa Perez Grau
- Credential
- MD
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License numbers
- 13570 PR
13270 PR
Self-reported in NPPES; status is on the state search - Practice location
- 1429 Ave Fernandez Juncos, San Juan, PR 00909
- Phone
- (787) 946-4401
- Enumerated
- Mar 8, 2006
- Record last updated
- Jan 15, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (787) 946-4490
- Medicare enrollment
- Enrolled (PECOS I20040807000034); accepts Medicare assignment
- Medical or professional school
- Ponce School Of Medicine, 1997
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 134 in Puerto Rico → Look up another NPI →
Verify Maria Eloisa Perez Grau 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 13570Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
93% more Medicare Part D claims than the average hematology & oncology physician in 2024
1,692 Medicare Part D claims for 268 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 30% of claims. 35 claims were for opioids.
Most prescribed
- Anastrozole273 claims
- Famotidine97 claims
- Xtandi82 claims
- Warfarin Sodium75 claims
- Ondansetron Hcl60 claims
- Xarelto49 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: $983.03
43 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie 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.
Maria Eloisa Perez Grau among 134 hematology & oncology physician records in Puerto Rico
Maria Eloisa Perez Grau, 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 2006, is newer than 16% of them.
- NPI issued2006 · 16% of these records are older, 51% newer
- In a Medicare fileYes · 91% of these records are
- In the CMS Doctors and Clinicians fileYes · 73% of these records are
- Graduated1997 · median 2001 among the 98 with a school on file
- Record last updated2019 · 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
- Eduardo Hernandez, M.D.San Juan, PR 009091780049650
- Jose Marques Bibiloni, MDSanturce, PR 009091033101068
- Jose Pesquera-Garcia, M.D.Santurce, PR 009091598788408
- Raul Morales-Borges, M.D.San Juan, PR 009071063412047
- Francisco Muniz, M.D.San Juan, PR 009071255531505
- Ernest Musgrave, MEDICAL DOCTORSan Juan, PR 009071669695615
- Hilda Rivera Quinones, M.D.San Juan, PR 009071275682502
- Luis Acaba, M.D.San Juan, PR 009171225031396
Common questions
What is Maria Eloisa Perez Grau, MD's NPI number?
Maria Eloisa Perez Grau, MD's National Provider Identifier (NPI) is 1821065855, issued on Mar 8, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Maria Eloisa Perez Grau, MD located?
The NPPES record lists a practice address at 1429 Ave Fernandez Juncos, San Juan, PR, 00909. Phone: (787) 946-4401. Providers update this record themselves, so call before visiting.
How can I verify Maria Eloisa Perez Grau, MD's license?
NPPES lists Puerto Rico license number 13570, as entered by the provider. Search the Puerto Rico board that licenses this profession; the NPPES record confirms identity only.
How much does Maria Eloisa Perez Grau, MD prescribe under Medicare Part D?
In 2024, Maria Eloisa Perez Grau, MD had 1,692 Medicare Part D claims for 268 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.