William Castilla, MD
Pediatrics Physician · Passaic, NJ
William Castilla, MD is a pediatrics physician with a practice address in Passaic, New Jersey, and NPI 1235283938, issued on Jan 22, 2007. Check the license (New Jersey 25MA02465100, as entered in NPPES) on the New Jersey State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- William Castilla
- Credential
- MD
- Primary taxonomy
- Pediatrics Physician 208000000X
- License number
- 25MA02465100 NJ
Self-reported in NPPES; status is on the state search - Practice location
- 293 Passaic Street, Passaic, NJ 07055
- Phone
- (973) 365-1377
- Enumerated
- Jan 22, 2007
- Record last updated
- Jan 19, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (973) 365-1229
- Medicaid ID
- 477050101 NJ
- Entity
- Type 1 · individual
8 nearest pediatrics physician records → All 2,181 in New Jersey → Look up another NPI →
Verify William Castilla 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 25MA02465100Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
94% fewer Medicare Part D claims than the average pediatrics physician in 2024
21 Medicare Part D claims, against an average of 375 among the 5,609 providers of this specialty who prescribed in Part D.
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.
William Castilla among 2,181 pediatrics physician records in New Jersey
William Castilla, MD is one of 2,181 pediatrics physician records with a practice address in New Jersey. 48% 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 55% of them.
- NPI issued2007 · 55% of these records are older, 36% newer
- In a Medicare fileYes · 48% of these records are
- In the CMS Doctors and Clinicians fileNo · 7% of these records are
- Record last updated2011 · 69% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208000000X and a New Jersey practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
17 pediatrics physician records list a practice address in Passaic
They are 17 of the 665 NPPES records with a practice address in Passaic, and 2,181 pediatrics physician records in New Jersey.
All 2,181 in New Jersey → Every provider in Passaic → Pediatrics Physician nationwide →
The 8 pediatrics physician records with the nearest ZIP codes
- Raul Almanzar, MDPassaic, NJ 070551164491585
- Holanda Bravo, M.D.Passaic, NJ 070551033268669
- James Brief, M.D.Passaic, NJ 070551013144104
- Antonio Camilo, MDPassaic, NJ 070551629047048
- Yocasta Fernandez, MDPassaic, NJ 070551316909674
- Joanna Iskowitz, MDPassaic, NJ 070551750517058
- Judelka Japa Camilo, MDPassaic, NJ 070551659418978
- Mario Mico, M.D.Passaic, NJ 070551730221714
Common questions
What is William Castilla, MD's NPI number?
William Castilla, MD's National Provider Identifier (NPI) is 1235283938, issued on Jan 22, 2007. An NPI identifies a provider in billing; it is not a license.
Where is William Castilla, MD located?
The NPPES record lists a practice address at 293 Passaic Street, Passaic, NJ, 07055. Phone: (973) 365-1377. Providers update this record themselves, so call before visiting.
How can I verify William Castilla, MD's license?
NPPES lists New Jersey license number 25MA02465100, 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 William Castilla, MD prescribe under Medicare Part D?
In 2024, William Castilla, MD had 21 Medicare Part D claims; the average among pediatrics physician prescribers was 375. 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.