Dr. William Castilla, MD
- Part D claims, 2024
- 21
- Industry payments
- $11
- Affiliated sites
- 1
- Medical group
- 1
- State license
- 1
- Practice address
- 293 Passaic St, Passaic, NJ 07055-5803
- Practice phone
- Call (973) 365-1377
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Surendra M. Sharma
Multi-specialty group site · Passaic, New Jersey
Find Dr. Castilla's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. William Castilla is a pediatrician in Passaic, New Jersey
Dr. Castilla practices at Surendra M. Sharma in Passaic, New Jersey.
Dr. Castilla's NPI, 1235283938, was assigned on January 22, 2007. Dr. Castilla holds New Jersey license 25MA02465100.
- NPI
- 1235283938NPI Registry (opens in a new tab)
- NPI enumeration date
- January 22, 2007
- NPI status
- Active
- Practice phone
- (973) 365-1377
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. William Castilla practices at Surendra M. Sharma in Passaic, New Jersey
Dr. Castilla's primary practice is Surendra M. Sharma, at 293 Passaic St, Passaic, NJ 07055-5803. The practice phone is (973) 365-1377.
- Surendra M. Sharma293 Passaic St, Passaic, NJ 07055-5803Phone(973) 365-1377
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. William Castilla is affiliated with 1 site of care and 1 medical group
Dr. Castilla's primary practice is Surendra M. Sharma in Passaic, New Jersey. Dmand AI also links Dr. Castilla to 1 medical group, named with a free account.
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dmand AI tracks the EHR system at Dr. William Castilla's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Castilla practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Surendra M. Sharma | Available with a free account |
| +1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across each health system and 6.2K+ hospitals, with verified contacts in the same login.
Dr. William Castilla is one of 1,923 pediatricians in New Jersey
Pediatrics is Dr. Castilla's primary specialty in the NPI Registry, under taxonomy code 208000000X. Dr. Castilla is licensed in New Jersey.
Specialties and state licenses
- Pediatrics, New JerseyPrimary
Pediatricians near Dr. Castilla
Counts of pediatricians with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. William Castilla wrote 21 Medicare Part D claims in 2024
In 2024, Dr. Castilla wrote 21 Medicare Part D claims. 86% of them were for generic drugs. CMS names the drug for 11 of them, across 1 drug with 11 or more claims each, at $307 in total drug cost.
Dr. Castilla's Part D claims by kind of drug, 2024
- Generic18 claims86%
- Brand-name and other3 claims14%
Dr. Castilla's most prescribed drugs by claims, 2018
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. William Castilla received $11 in industry payments in 2021
CMS Open Payments shows 1 general payment to Dr. Castilla from 1 drug or device company in 2021. Food and beverage make up the largest share, 100% of the total. GlaxoSmithKline, LLC. paid the most, $11.
Companies that paid Dr. Castilla the most, 2021 to 2021
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. William Castilla's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. William Castilla
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. William Castilla's NPI number?
Dr. William Castilla's NPI number is 1235283938. It was assigned on January 22, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. William Castilla?
Dr. William Castilla is a pediatrician in Passaic, New Jersey. The primary specialty in the NPI Registry is Pediatrics Physician (taxonomy code 208000000X).
Where does Dr. William Castilla practice?
Dr. Castilla practices at 293 Passaic St, Passaic, NJ 07055-5803. Dr. Castilla's primary practice is Surendra M. Sharma in Passaic, New Jersey. Dmand AI also links Dr. Castilla to 1 medical group.
What is Dr. William Castilla's office phone number?
The practice phone on file for Dr. Castilla is (973) 365-1377.
What is Dr. William Castilla's medical license number?
Dr. Castilla holds New Jersey license 25MA02465100.
What drugs does Dr. William Castilla prescribe most?
In 2018 Medicare Part D data, Dr. Castilla's most prescribed drugs by claims were Hydroxychloroquine Sulfate.
Has Dr. William Castilla received payments from drug or device companies?
CMS Open Payments shows $11 in general payments to Dr. Castilla from 1 company from 2021 to 2021. The largest total came from GlaxoSmithKline, LLC.
How long has Dr. William Castilla been practicing?
Dr. Castilla's NPI was assigned in 2007.
Selling to pediatrics practices?
See pediatricians in New Jersey by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card