Collin Ross, PHD
Physician Assistant · San Ysidro, CA
Collin Ross, PHD is a physician assistant with a practice address in San Ysidro, California, and NPI 1629182050, issued on Aug 19, 2006. Check the license (California PA16058, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Collin Ross
- Credential
- PHD
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- PA16058 CA
Self-reported in NPPES; status is on the state search - Practice location
- 4004 Beyer Blvd, San Ysidro, CA 92173
- Phone
- (619) 662-4100
- Enumerated
- Aug 19, 2006
- Record last updated
- Mar 7, 2023
- Medicare enrollment
- Enrolled (PECOS I20050325000607); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 14,451 in California → Look up another NPI →
Also registered at 4004 Beyer Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Lizbeth AcunaCase Manager/Care Coordinator1134363187
- Noemi Arrieta, DOFamily Medicine Physician1912223496
- Salvador Balvaneda, IMFTMarriage & Family Therapist1659413086
- Vanessa Bastidas, MD, MPHFamily Medicine Physician1831893478
- Rita BedermanMarriage & Family Therapist1376684142
- Justin Bennink, M.D.Family Medicine Physician1083033146
Verify Collin Ross in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license PA16058Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.2 times the Medicare Part D claims of the average physician assistant in 2024
2,671 Medicare Part D claims for 333 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims.
Most prescribed
- Atorvastatin Calcium183 claims
- Metformin Hcl182 claims
- Lisinopril166 claims
- Gabapentin142 claims
- Losartan Potassium134 claims
- Amlodipine Besylate127 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
- Centro DE Salud DE LA Comunidad DE San Ysidro, Inc.Chula Vista, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Collin Ross among 14,451 physician assistant records in California
Collin Ross, PHD 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 2006, is newer than 1% of them.
- NPI issued2006 · 1% of these records are older, 87% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated2001 · median 2018 among the 7,214 with a school on file
- Record last updated2023 · 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).
8 physician assistant records list a practice address in San Ysidro
They are 8 of the 218 NPPES records with a practice address in San Ysidro, and 14,451 physician assistant records in California.
All 14,451 in California → Every provider in San Ysidro → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Roxanna Calvario, PASan Ysidro, CA 921731275087421
- Clarissa Castillo, PASan Ysidro, CA 921731871506378
- Elvia Charles, PASan Ysidro, CA 921731558445411
- Prescott Lederer, PASan Ysidro, CA 921731417413048
- Lorena Montes, PASan Ysidro, CA 921731598934788
- Kristine Porto Madurski, PASan Ysidro, CA 921731053403782
- Nassera Saidani, MS, PA-CSan Ysidro, CA 921731710292248
- Brian DewhirstSan Diego, CA 921611275039703
Common questions
What is Collin Ross, PHD's NPI number?
Collin Ross, PHD's National Provider Identifier (NPI) is 1629182050, issued on Aug 19, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Collin Ross, PHD located?
The NPPES record lists a practice address at 4004 Beyer Blvd, San Ysidro, CA, 92173. Phone: (619) 662-4100. Providers update this record themselves, so call before visiting.
How can I verify Collin Ross, PHD's license?
NPPES lists California license number PA16058, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Collin Ross, PHD prescribe under Medicare Part D?
In 2024, Collin Ross, PHD had 2,671 Medicare Part D claims for 333 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.