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CAITLIN DE CASTRO
NPI 1265219075
Physician Assistant in San Mateo, CA

Active since September 13, 2023PECOS EnrolledAccepts Medicare Assignment
50 S SAN MATEO DR, SAN MATEO, CA 94401(650) 652-8500(650) 652-8501 Get Directions Write a Review

NPPES record last updated: May 5, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Caitlin De Castro NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

CAITLIN DE CASTRO (NPI 1265219075) is an individual physician assistant in San Mateo, California, licensed in California (PA64051) and active in the NPI registry since September 2023. She is enrolled in Medicare PECOS, maintains a secondary practice location in Santa Rosa, and is a graduate of Other (2023).

NPPES Registry Identity

NPI1265219075
Entity TypeIndividualFemale
Primary Taxonomy363A00000X
Provider Legal NameCAITLIN DE CASTRO
Location Address50 S SAN MATEO DRSan Mateo, CA 94401-3857
Mailing AddressPo Box 276950Sacramento, CA 95827-6950 · (650) 652-8500
Phone(650) 652-8500
Fax(650) 652-8501
Sole ProprietorNo
Medical School CMSOtherGraduated 2023
Enumeration DateSeptember 13, 2023
Last NPPES UpdateMay 5, 2026
NPPES CertifiedMay 5, 2026
✔ NPI 1265219075 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPhysician AssistantPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363A00000X
License✔ Licensed in CA · PA64051
Definition
A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.
50 S SAN MATEO DR, San Mateo, CA 94401
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Secondary Practice Location 1

Location 11162 Montgomery Dr Fl 2Santa Rosa, CA 95405-4802 · Phone (707) 890-4100

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Caitlin De Castro is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID7214377266
PECOS Enrollment IDI20240424003478
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 8

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
302 services259 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
49 services46 patients
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439
An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.
37 services37 patients
Influenza vaccine, inactivated 90653
The Influenza vaccine, inactivated, is a shot given to protect against the flu. It contains killed virus particles that help your body build immunity to the flu. It's recommended annually to keep your protection up-to-date. It's safe for ages 6 months and up.
24 services24 patients
Administration of influenza virus vaccine G0008
The administration of the influenza virus vaccine, also known as the flu shot, is a simple procedure to protect against the flu. A healthcare provider injects a small dose of the vaccine into your arm. This stimulates your immune system to produce antibodies, which will help your body fight off the flu if exposed.
24 services24 patients
Telephone medical discussion with physician, 5-10 minutes 99441
A telephone medical discussion with a physician is a brief, 5-10 minute call where you can discuss your health concerns. It's a convenient way to receive medical advice without needing to visit a clinic. It's important to prepare questions in advance to make the most of this time.
14 services14 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94401 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$104.51 typical visit price
range $69.00 – $202.35
Typical copayment $26.12 (range $17.25 – $50.58)
Most-billed visit code 99203
Established Patient
$84.91 typical visit price
range $23.44 – $166.46
Typical copayment $21.22 (range $5.86 – $41.61)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

SOMYA JALAN MD
Pediatrics
50 S SAN MATEO DR
SAN MATEO, CA 94401
San Mateo County (650) 652-8353
DR. STEPHEN BUCHNER MD
Pediatrics
50 S SAN MATEO DR, STE 180
SAN MATEO, CA 94401
San Mateo County (650) 342-4145
DR. GEORGE WILLIAM SHORAGO M.D.
Otolaryngology
50 S SAN MATEO DR, SUITE 320
SAN MATEO, CA 94401
San Mateo County (650) 340-7200
JULIAN HARDY MCLAIN MD
Internal Medicine (Hematology & Oncology)
50 S SAN MATEO DR
SAN MATEO, CA 94401
San Mateo County (650) 696-5420
HOWARD K CHOW MD
Pediatrics
50 S SAN MATEO DR, SUITE 260
SAN MATEO, CA 94401
San Mateo County (650) 579-6500
DENISE MARY ROS
Physician Assistant
50 S SAN MATEO DR
SAN MATEO, CA 94401
San Mateo County (650) 652-8788
JEANNE V BEYMER MD
Pediatrics
50 S SAN MATEO DR, STE 260
SAN MATEO, CA 94401
San Mateo County (650) 579-6500
DR. JOHN ROBERT GRIFFIN M.D.
Surgery (Plastic and Reconstructive Surgery)
50 S SAN MATEO DR, STE 470
SAN MATEO, CA 94401
San Mateo County (650) 652-8239

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Caitlin De Castro's NPI number?

The NPI number for Caitlin De Castro is 1265219075. It was assigned to this individual provider in the NPPES registry on September 13, 2023.

Where is Caitlin De Castro located?

Caitlin De Castro practices at 50 S San Mateo Dr, San Mateo, CA 94401. The listed phone number is (650) 652-8500.

What is Caitlin De Castro's specialty?

The primary specialty registered for this NPI is Physician Assistant with taxonomy code 363A00000X.

Is Caitlin De Castro enrolled in Medicare?

Yes. Caitlin De Castro is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

When was this NPI record last updated?

The NPPES record for Caitlin De Castro was last updated on May 5, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.