Joseph Defrank Castro, MD
Internal Medicine Physician · Newark, NJ
Joseph Defrank Castro, MD is an internal medicine physician with a practice address in Newark, New Jersey, and NPI 1801095864, issued on Jul 11, 2007. Check the license (New Jersey 25MA09544000, as entered in NPPES) on the New Jersey State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Joseph Defrank Castro
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 25MA09544000 NJ
003193 NY
Self-reported in NPPES; status is on the state search - Practice location
- 201 Lyons Ave, Newark, NJ 07112
- Phone
- (973) 926-7000
- Enumerated
- Jul 11, 2007
- Record last updated
- Jun 11, 2024
- Fax
- (732) 923-2272
- Medicare enrollment
- Enrolled (PECOS I20160314000414); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 4,632 in New Jersey → Look up another NPI →
Also registered at 201 Lyons Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mohammad Abbas, MDStudent in an Organized Health Care Education/Training Program1922940550
- Malaz Abdalla, MBBSStudent in an Organized Health Care Education/Training Program1861196818
- Rawan Abdalla, MDStudent in an Organized Health Care Education/Training Program1376481739
- Ahmed AbdaltawabStudent in an Organized Health Care Education/Training Program1689514093
- Girom AbdelmesihStudent in an Organized Health Care Education/Training Program1548109044
- Safa AbdulhaiStudent in an Organized Health Care Education/Training Program1437845245
Verify Joseph Defrank Castro in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNew Jersey State Board of Medical Examiners
Search for license 25MA09544000Check 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 internal medicine physician in 2024
463 Medicare Part D claims for 221 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium29 claims
- Pantoprazole Sodium25 claims
- Cefuroxime23 claims
- Eliquis17 claims
- Furosemide17 claims
- Metoprolol Succinate17 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.
Bills Medicare through one group practice
- Internal Medicine OF Morris County LLCDenville, NJ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Joseph Defrank Castro among 4,632 internal medicine physician records in New Jersey
Joseph Defrank Castro, MD is one of 4,632 internal medicine physician records with a practice address in New Jersey. 82% 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 50% of them.
- NPI issued2007 · 50% of these records are older, 41% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated2000 · median 2000 among the 3,132 with a school on file
- 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 207R00000X and a New Jersey practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
184 internal medicine physician records list a practice address in Newark
They are 184 of the 4,875 NPPES records with a practice address in Newark, and 4,632 internal medicine physician records in New Jersey.
All 4,632 in New Jersey → Every provider in Newark → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Razia Awan, MDNewark, NJ 071121366428567
- Muhammed Ayub, M.D.Newark, NJ 071121710941836
- Asa Crews, M.D.Newark, NJ 071121962417758
- Christian Engell, MDNewark, NJ 071121831374305
- Rafia Hussaini, MDNewark, NJ 071121194902643
- Kanik Kathuria, M.D.Newark, NJ 071121609118140
- Theresa Liao, MDNewark, NJ 071121447354501
- Eva Mehta, D.O.Newark, NJ 071121245557883
Common questions
What is Joseph Defrank Castro, MD's NPI number?
Joseph Defrank Castro, MD's National Provider Identifier (NPI) is 1801095864, issued on Jul 11, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Joseph Defrank Castro, MD located?
The NPPES record lists a practice address at 201 Lyons Ave, Newark, NJ, 07112. Phone: (973) 926-7000. Providers update this record themselves, so call before visiting.
How can I verify Joseph Defrank Castro, MD's license?
NPPES lists New Jersey license number 25MA09544000, as entered by the provider. Search the New Jersey State Board of Medical Examiners at https://newjersey.mylicense.com/verification/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Joseph Defrank Castro, MD prescribe under Medicare Part D?
In 2024, Joseph Defrank Castro, MD had 463 Medicare Part D claims for 221 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.