Physician Profile
Guillermo Castillo, M.D.
Unclaimed ProfileAbout Dr. Castillo
Guillermo Castillo, M.D. is a healthcare provider in San Diego, CA specializing in family medicine. Guillermo trained at University of Southern California Keck School of Medicine, graduating in 2001. According to Medicare claims data, Guillermo cared for 27 Medicare patients across 27 services. The services billed most often include electrocardiogram (ecg) up to 30 days continuous with transmission of patient triggered events with review and report by health care professional.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
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
- (858) 499-2717
- Email not available
Practice Locations
2001 4TH AVE
San Diego, CA 92101
Conditions Commonly Evaluated or Treated
Within Family Medicine generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
Cardiometabolic
Digestive
Genitourinary and reproductive
Musculoskeletal and pain
Neurologic and behavioral
Respiratory and infectious
Skin
Common childhood and ear conditions
Pain & Joints
Procedures & services
Most searched procedures
Preventive interventions
Screening and testing
Diagnostic Tests
Exams & Screenings
Foot and Leg Pain
Heart & Circulation
Injections
Lungs & Breathing
Minor Procedures
Occupational Health
Office procedures
Pain Management
Preventive Care
Respiratory
Senior Care
Sexual & Reproductive Health
Skin Procedures
Sleep Health
Urgent Care Procedures
Wellness & Weight
Women's Health
Procedures Most Often Billed to Medicare
27 services · 27 patients · 1 distinct code
| Procedure | Type | Code | Services |
|---|---|---|---|
| Electrocardiogram (ecg) up to 30 days continuous with transmission of patient triggered events with review and report by health care professional | Treatment | 93229 |
27 |
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 family doctors at this location 5
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 — 32 related providers in 4 groups
Other family doctors in San Diego 8
Same specialty, same city.
Trained at University of Southern California Keck School of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 2001 at University of Southern California Keck School of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Electrocardiogram (ecg) up to 30 days continuous with transmission of patient triggered events with review and report by health care professional 8
Providers in CA who bill this service to Medicare most often.
Common questions
What kind of doctor is Guillermo Castillo?
Guillermo Castillo is a family doctor in San Diego, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Family Medicine”.
NPI registry
What is Guillermo Castillo's address?
Guillermo Castillo is listed at 2001 4Th Ave, San Diego, CA 92101. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Guillermo Castillo?
The number on file is (858) 499-2717. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Guillermo Castillo's NPI number?
Guillermo Castillo's National Provider Identifier is 1366558322. 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 Guillermo Castillo train?
Guillermo Castillo attended University of Southern California Keck School of Medicine, graduating in 2001. This comes from the CMS National Downloadable File.
CMS public data
How long has Guillermo Castillo been practicing?
Guillermo Castillo has 25 years experience. Calculated from a graduation year of 2001, reported in the CMS National Downloadable File.
CMS public data
What procedures does Guillermo Castillo perform?
According to Medicare billing data, Guillermo Castillo provides treatments such as electrocardiogram up to 30 days continuous with transmission of patient triggered events with review and report by health care professional. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Guillermo Castillo confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Guillermo Castillo. 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.