DR. GUILLERMO CASTILLO M.D.
NPI 1366558322
Family Medicine in San Diego, CA

Q: What is Guillermo Castillo's NPI number?

The NPI number for Guillermo Castillo is 1366558322. It was assigned to this individual provider in the NPPES registry on August 22, 2006.

Q: What is Guillermo Castillo's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Active since August 22, 2006PECOS Enrolled

2001 4TH AVE, SAN DIEGO, CA 92101(858) 499-2717(858) 636-2210 Get Directions Write a Review

NPPES record last updated: May 5, 2017. Verified against the NPPES registry weekly; last sync: October 18, 2026.

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About Dr. Guillermo Castillo M.d. NPPES

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

DR. GUILLERMO CASTILLO M.D. (NPI 1366558322) is an individual family medicine provider in San Diego, California, licensed in California (A83282) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS and is a graduate of University Of Southern California Keck School Of Medicine (2001).

NPPES Registry Identity

NPI1366558322

Entity TypeIndividualMale

Primary Taxonomy207Q00000X

Provider Legal NameDR. GUILLERMO CASTILLOCredential: M.D.

Location Address2001 4TH AVESan Diego, CA 92101-2303

Mailing Address2001 4th AveSan Diego, CA 92101-2303 · (858) 499-2717 · Fax (858) 636-2210

Phone(858) 499-2717

Fax(858) 636-2210

Sole ProprietorNo

Medical School CMSUniversity Of Southern California Keck School Of MedicineGraduated 2001

Enumeration DateAugust 22, 2006

Last NPPES UpdateMay 5, 2017

✔ NPI 1366558322 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207Q00000X

License✔ Licensed in CA · A83282

Definition

Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.

2001 4TH AVE, San Diego, CA 92101

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Other Identifiers 2

Medicare UPINI15103CA

Medicare PINA83282BCA

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Guillermo Castillo M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID9032186796

PECOS Enrollment IDI20040913000620

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.

Medicare Billing Reassignments

Medicare enrollment records show Guillermo Castillo reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Sky-Care Diagnostic Monitoring Center LLC

3.8 mi

Technician, Cardiology

3110 CAMINO DEL RIO S STE 307
San Diego, CA 92108

Reassigned Medicare billing, California enrollment

NPI 1295495190 (858) 775-6136

My Primary Care

3.8 mi

Family Medicine

3111 CAMINO DEL RIO N STE 452
San Diego, CA 92108

Reassigned Medicare billing, California enrollment

NPI 1629869573 (760) 662-8659

Vital Care Health Group A Medical Corporation

87 mi

Primary Care

1426 UNIVERSITY AVE STE C
Riverside, CA 92507

Reassigned Medicare billing, California enrollment
5 clinicians in this Medicare group

NPI 1619778289 (951) 522-1425

B & r Wound Care

104 mi

Family Medicine

5800 S EASTERN AVE, STE 500
Commerce, CA 90040

Reassigned Medicare billing, California enrollment

NPI 1013781350 (760) 694-3587

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims

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.

Electrocardiogram (ecg) up to 30 days continuous with transmission of patient triggered events with review and report by health care professional 93229

An Electrocardiogram (ECG) is a test that records your heart's electrical activity for up to 30 days. You trigger a transmission if you feel symptoms, which is then reviewed by a healthcare professional. The report helps diagnose heart conditions.

27 services27 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92101 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

$94.87 typical visit price

range $62.10 – $184.71

Typical copayment $23.71 (range $15.52 – $46.17)

Most-billed visit code 99203

Established Patient

$108.42 typical visit price

range $20.62 – $151.42

Typical copayment $27.10 (range $5.15 – $37.85)

Most-billed visit code 99214

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.

DR. TIMOTHY STUART HINMAN M.D.

Emergency Medicine