Felipe Fernandez Del Castillo, M.D.
Nephrology Physician · Worcester, MA
Felipe Fernandez Del Castillo, M.D. is a nephrology physician with a practice address in Worcester, Massachusetts, and NPI 1740639681, issued on Jun 10, 2016. Check the license (Massachusetts 286110, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Felipe Fernandez Del Castillo
- Credential
- M.D.
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License numbers
- 286110 MA
125068852 IL
Self-reported in NPPES; status is on the state search - Practice location
- 123 Summer St Ste 380N, Worcester, MA 01608
- Phone
- (508) 363-6126
- Enumerated
- Jun 10, 2016
- Record last updated
- Aug 12, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (508) 363-9266
- Medicaid ID
- 110171641A MA
- Medicare enrollment
- Enrolled (PECOS I20210610003025); accepts Medicare assignment
- Medical or professional school
- University Of Massachusetts Medical School, 2016
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 417 in Massachusetts → Look up another NPI →
Verify Felipe Fernandez Del Castillo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 286110Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.8 times the Medicare Part D claims of the average nephrology physician in 2024
4,154 Medicare Part D claims for 705 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims.
Most prescribed
- Amlodipine Besylate533 claims
- Lisinopril275 claims
- Irbesartan227 claims
- Chlorthalidone206 claims
- Olmesartan Medoxomil191 claims
- Furosemide179 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: $110.95
1 payment: food and beverage; the largest payer was Nxstage Medical, Inc. The 8,230 providers of this specialty with any payment received $3,091.37 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 2 group practices
- Atrius Health IncDedham, MA
- Reliant Medical Group IncWorcester, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Felipe Fernandez Del Castillo among 417 nephrology physician records in Massachusetts
Felipe Fernandez Del Castillo, M.D. is one of 417 nephrology physician records with a practice address in Massachusetts. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 85% of them.
- NPI issued2016 · 85% of these records are older, 12% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated2016 · median 2001 among the 295 with a school on file
- Record last updated2021 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RN0300X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nephrology Physician providers in Massachusetts
There are 417 nephrology physician records in Massachusetts.
All 417 in Massachusetts → Every provider in Worcester → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- Robert Black, MDWorcestor, MA 016081689626913
- Nishanth Girija Kumar, M.D.Worcester, MA 016081548643752
- Neeraj Jain, M.DWorcester, MA 016081144425539
- Sonia Kamath, M.D.Worcester, MA 016081851347736
- Hemant Magoo, M.D.Worcester, MA 016081275865131
- Suzanne Martin, M.D.Worcester, MA 016081790890754
- Kostas Papamarkakis, M.D.Worcester, MA 016081699160234
- Deep Phachu, M.D.Worcester, MA 016081912435736
Common questions
What is Felipe Fernandez Del Castillo, M.D.'s NPI number?
Felipe Fernandez Del Castillo, M.D.'s National Provider Identifier (NPI) is 1740639681, issued on Jun 10, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Felipe Fernandez Del Castillo, M.D. located?
The NPPES record lists a practice address at 123 Summer St Ste 380N, Worcester, MA, 01608. Phone: (508) 363-6126. Providers update this record themselves, so call before visiting.
How can I verify Felipe Fernandez Del Castillo, M.D.'s license?
NPPES lists Massachusetts license number 286110, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Felipe Fernandez Del Castillo, M.D. prescribe under Medicare Part D?
In 2024, Felipe Fernandez Del Castillo, M.D. had 4,154 Medicare Part D claims for 705 beneficiaries; the average among nephrology physician prescribers was 1,465. 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.