Justiniano Castro - Montalvo, MD
Hematology & Oncology Physician · Arecibo, PR
Justiniano Castro - Montalvo, MD is a hematology & oncology physician with a practice address in Arecibo, Puerto Rico, and NPI 1811041114, issued on Jan 23, 2007. Check the license (Puerto Rico 10600, as entered in NPPES) with the Puerto Rico board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Justiniano Castro - Montalvo
- Credential
- MD
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- 10600 PR
Self-reported in NPPES; status is on the state search - Practice location
- Urb Garcia Calle Andres Garcia NO. 53, Arecibo, PR 00612
- Phone
- (787) 817-4973
- Enumerated
- Jan 23, 2007
- Record last updated
- Feb 17, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (787) 817-4997
- Medicare enrollment
- Enrolled (PECOS I20051006000292); accepts Medicare assignment
- Medical or professional school
- University Of Puerto Rico School Of Medicine, 1987
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 134 in Puerto Rico → Look up another NPI →
Verify Justiniano Castro - Montalvo 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 10600Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.0 times the Medicare Part D claims of the average hematology & oncology physician in 2024
1,782 Medicare Part D claims for 234 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 25% of claims. 192 claims were for opioids.
Most prescribed
- Anastrozole181 claims
- Gabapentin84 claims
- Letrozole62 claims
- Tramadol Hcl62 claims
- Revlimid61 claims
- Fentanyl58 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: $19.95
1 payment: food and beverage; the largest payer was Karyopharm Therapeutics 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.
Bills Medicare through one group practice
- Instituto Del Cancer Y Enfermedades DE LA Sangre, CspArecibo, PR
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Justiniano Castro - Montalvo among 134 hematology & oncology physician records in Puerto Rico
Justiniano Castro - Montalvo, 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 2007, is newer than 49% of them.
- NPI issued2007 · 49% of these records are older, 36% newer
- In a Medicare fileYes · 91% of these records are
- In the CMS Doctors and Clinicians fileYes · 73% of these records are
- Graduated1987 · median 2001 among the 98 with a school on file
- Record last updated2012 · 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 Arecibo → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Jose Davila-Torres, M.D.Arecibo, PR 006121073613352
- Cesar Proano, MDArecibo, PR 006121700926755
- Liza Paulo Malave, MDAguadilla, PR 006031205039047
- Luis Sepulveda-Maldonado, M.D.Ponce, PR 006031598029381
- Victor Vazquez-Rodriguez, M.D.Aguadilla, PR 006031427266956
- Hector Cintron Colon, M.D.Camuy, PR 006271447704234
- Solalba Bueno-OrengoDorado, PR 006461780978346
- Braulio Cuesta Camunas, MDManati, PR 006741003373192
Common questions
What is Justiniano Castro - Montalvo, MD's NPI number?
Justiniano Castro - Montalvo, MD's National Provider Identifier (NPI) is 1811041114, issued on Jan 23, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Justiniano Castro - Montalvo, MD located?
The NPPES record lists a practice address at Urb Garcia Calle Andres Garcia NO. 53, Arecibo, PR, 00612. Phone: (787) 817-4973. Providers update this record themselves, so call before visiting.
How can I verify Justiniano Castro - Montalvo, MD's license?
NPPES lists Puerto Rico license number 10600, as entered by the provider. Search the Puerto Rico board that licenses this profession; the NPPES record confirms identity only.
How much does Justiniano Castro - Montalvo, MD prescribe under Medicare Part D?
In 2024, Justiniano Castro - Montalvo, MD had 1,782 Medicare Part D claims for 234 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.