Maria Rosario Castellon, P.A.-C
Physician Assistant · Sherman Oaks, CA
Maria Rosario Castellon, P.A.-C is a physician assistant with a practice address in Sherman Oaks, California, and NPI 1306003272, issued on May 19, 2008. Check the license (California PA14427, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Maria Rosario Castellon
- Credential
- P.A.-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- PA14427 CA
Self-reported in NPPES; status is on the state search - Practice location
- 4955 Van Nuys Blvd Ste 200, Sherman Oaks, CA 91403
- Phone
- (818) 981-1555
- Enumerated
- May 19, 2008
- Record last updated
- Aug 1, 2024
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 14,451 in California → Look up another NPI →
Also registered at 4955 Van Nuys Blvd Ste 200
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Christina TossounPhysician Assistant1053833772
Verify Maria Rosario Castellon in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license PA14427Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
72% fewer Medicare Part D claims than the average physician assistant in 2024
233 Medicare Part D claims for 37 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. 35 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen24 claims
- Carisoprodol18 claims
- Simvastatin13 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: $136.54
7 payments; by number, the most common kind was food and beverage; the largest payer was Revance Therapeutics, Inc. The 64,719 providers of this specialty with any payment received $841.65 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.
Maria Rosario Castellon among 14,451 physician assistant records in California
Maria Rosario Castellon, P.A.-C is one of 14,451 physician assistant records with a practice address in California. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 22% of them.
- NPI issued2008 · 22% of these records are older, 75% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 50% of these records are
- Record last updated2024 · 40% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
44 physician assistant records list a practice address in Sherman Oaks
They are 44 of the 2,691 NPPES records with a practice address in Sherman Oaks, and 14,451 physician assistant records in California.
All 14,451 in California → Every provider in Sherman Oaks → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Jessica Chalmers, PA-CSherman Oaks, CA 914031346552411
- Coury Clemens, PASherman Oaks, CA 914031609137249
- Zepyur Dishigrikyan, PASherman Oaks, CA 914031841775509
- Darcesean Gamble, PASherman Oaks, CA 914031003012162
- Jessica HeroldSherman Oaks, CA 914031407376940
- Ryan Jordan, PASherman Oaks, CA 914031942481742
- Patrick Le, PA-CSherman Oaks, CA 914031225494644
- Caroline MainSherman Oaks, CA 914031730678855
Common questions
What is Maria Rosario Castellon, P.A.-C's NPI number?
Maria Rosario Castellon, P.A.-C's National Provider Identifier (NPI) is 1306003272, issued on May 19, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Maria Rosario Castellon, P.A.-C located?
The NPPES record lists a practice address at 4955 Van Nuys Blvd Ste 200, Sherman Oaks, CA, 91403. Phone: (818) 981-1555. Providers update this record themselves, so call before visiting.
How can I verify Maria Rosario Castellon, P.A.-C's license?
NPPES lists California license number PA14427, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Maria Rosario Castellon, P.A.-C prescribe under Medicare Part D?
In 2024, Maria Rosario Castellon, P.A.-C had 233 Medicare Part D claims for 37 beneficiaries; the average among physician assistant prescribers was 830. 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.