Provider Profile
Caitlin De Castro
Unclaimed ProfileAbout Caitlin De Castro
Caitlin De Castro is a physician assistant practicing in San Mateo, CA. Medicare claims data shows Caitlin provided 473 services to 427 patients. The services billed most often include established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more, established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more, and annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it — free, and no identity document with a practice or institutional email.
Education & Training
Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (650) 652-8500
- Email not available
Practice Locations
50 S SAN MATEO DR
San Mateo, CA 94401
1162 Montgomery Dr Fl 2
Santa Rosa, CA 95405
Procedures Most Often Billed to Medicare
473 services · 427 patients · 8 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Influenza vaccine, inactivated | Treatment | 90653 |
24 | More often than most peers in Physician Assistant |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
302 | More than most peers in Physician Assistant |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
49 | As often as other peers in Physician Assistant |
| Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | Billing code | G0439 |
37 | As often as other peers in Physician Assistant |
| Administration of influenza virus vaccine | Billing code | G0008 |
24 | More often than most peers in Physician Assistant |
| Telephone medical discussion with physician, 5-10 minutes | Office visit | 99441 |
14 | Less often than most peers in Physician Assistant |
| Automated urinalysis test | Lab test | 81003 |
12 | Less often than most peers in Physician Assistant |
| Urinalysis, manual test | Lab test | 81002 |
11 | Less often than most peers in Physician Assistant |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other physician assistants at this location 1
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 8
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 31 related providers in 4 groups
Other physician assistants in San Mateo 7
Same specialty, same city.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 2023 at Other 8
Providers who graduated from the same medical school in the same year.
Also performs Influenza vaccine, inactivated 8
Providers in CA who bill this service to Medicare most often.
Common questions
What kind of doctor is Caitlin De Castro?
Caitlin De Castro is a physician assistant in San Mateo, CA. That is the designation recorded for this NPI in the federal registry.
NPI registry
What is Caitlin De Castro's address?
Caitlin De Castro is listed at 50 S San Mateo Dr, San Mateo, CA 94401. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Caitlin De Castro?
The number on file is (650) 652-8500. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Caitlin De Castro?
Caitlin De Castro's National Provider Identifier is 1265219075. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Caitlin De Castro train?
Caitlin De Castro attended Other, graduating in 2023. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Caitlin De Castro have?
Caitlin De Castro has 3 years experience. Calculated from a graduation year of 2023, reported in the CMS National Downloadable File.
CMS public data
What procedures does Caitlin De Castro perform?
According to Medicare billing data, Caitlin De Castro provides treatments such as influenza vaccine, inactivated, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Caitlin De Castro's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Caitlin De Castro. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.