Gustavo Luis Fernandez-Castro, M.D.
Hematology & Oncology Physician · New York, NY
Gustavo Luis Fernandez-Castro, M.D. is a hematology & oncology physician with a practice address in New York, New York, and NPI 1134175318, issued on May 26, 2006. Check the license (New York 343588, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Gustavo Luis Fernandez-Castro
- Credential
- M.D.
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License numbers
- 343588 NY
ME76272 FL
Self-reported in NPPES; status is on the state search - Practice location
- 425 W 59TH St FL 9, New York, NY 10019
- Phone
- (212) 523-5559
- Enumerated
- May 26, 2006
- Record last updated
- Jul 23, 2026
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 1,163 in New York → Look up another NPI →
Also registered at 425 W 59TH St FL 9
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Karishma Rupani, MD, MMSCHematology & Oncology Physician1487275525
Verify Gustavo Luis Fernandez-Castro in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNYS Education Department, Office of the Professions
Search for license 343588Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
12% fewer Medicare Part D claims than the average hematology & oncology physician in 2024
770 Medicare Part D claims for 114 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. 87 claims were for opioids.
Most prescribed
- Ondansetron Hcl83 claims
- Levothyroxine Sodium61 claims
- Oxycodone-Acetaminophen50 claims
- Megestrol Acetate40 claims
- Dexamethasone38 claims
- Eliquis36 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 81.3 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $33.80
1 payment: food and beverage; the largest payer was E.R. Squibb & Sons, L.L.C. 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.
Gustavo Luis Fernandez-Castro among 1,163 hematology & oncology physician records in New York
Gustavo Luis Fernandez-Castro, M.D. is one of 1,163 hematology & oncology physician records with a practice address in New York. 83% 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 15% of them.
- NPI issued2006 · 15% of these records are older, 53% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileNo · 72% of these records are
- Record last updated2026 · 61% 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 New York 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 New York
There are 1,163 hematology & oncology physician records in New York.
All 1,163 in New York → Every provider in New York → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Seth Cohen, MDNew York, NY 100191619950136
- Donald Colbourn, MDNew York, NY 100191184684235
- Anupama Goel, MDNew York, NY 100191649377698
- Michael Grossbard, MDNew York, NY 100191740263276
- John Olichney, M.D.New York, NY 100191639250772
- Karishma Rupani, MD, MMSCNew York, NY 100191487275525
- Gabriel Sara, M.D.New York, NY 100191356397905
- Elaine Shum, M.D.New York, NY 100191164716296
Common questions
What is Gustavo Luis Fernandez-Castro, M.D.'s NPI number?
Gustavo Luis Fernandez-Castro, M.D.'s National Provider Identifier (NPI) is 1134175318, issued on May 26, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gustavo Luis Fernandez-Castro, M.D. located?
The NPPES record lists a practice address at 425 W 59TH St FL 9, New York, NY, 10019. Phone: (212) 523-5559. Providers update this record themselves, so call before visiting.
How can I verify Gustavo Luis Fernandez-Castro, M.D.'s license?
NPPES lists New York license number 343588, as entered by the provider. Search the NYS Education Department, Office of the Professions at https://www.op.nysed.gov/services/verifications/online-verification-searches. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Gustavo Luis Fernandez-Castro, M.D. prescribe under Medicare Part D?
In 2024, Gustavo Luis Fernandez-Castro, M.D. had 770 Medicare Part D claims for 114 beneficiaries; the average among hematology & oncology physician prescribers was 877. Part D covers Medicare prescriptions only.
What is Gustavo Luis Fernandez-Castro, M.D.'s MIPS final score?
The 2023 MIPS final score is 81.3 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.