Gregory Castillo, MD - Family Medicine in Downey, CA

Gregory Castillo, MD is a Family Medicine physician based in Downey, California. Gregory Castillo is licensed to practice in California (license number A53294) and his current practice location is 9040 Telegraph Rd Ste 102, Downey, California. He can be reached at his office (for appointments etc.) via phone at (562) 861-0954.

NPI number for Gregory Castillo is 1700839917 and his current mailing address is Po Box 275, Artesia, California. He does not participate in medicare program and thus does not accept medicare assignments. His NPI Number is 1700839917.

Contact Information

Gregory Castillo, MD
9040 Telegraph Rd Ste 102,
Downey, CA 90240-2395
(562) 861-0954
(562) 231-1906

Map and Direction




Physician's Profile

Full NameGregory Castillo
GenderMale
SpecialityFamily Medicine
Location9040 Telegraph Rd Ste 102, Downey, California
Accepts Medicare AssignmentsDoes not participate in Medicare Program. He may not accept medicare assignment.
  NPI Data:
  • NPI Number: 1700839917
  • Provider Enumeration Date: 05/18/2006
  • Last Update Date: 03/07/2023

Medical Identifiers

Medical identifiers for Gregory Castillo such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1700839917NPI-NPPES
00A532940MedicaidCA

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207Q00000XFamily Medicine A53294 (California)Primary

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. Gregory Castillo is NOT enrolled with medicare and thus cannot prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
Gregory Castillo, MD
Po Box 275,
Artesia, CA 90702-0275

Ph: (562) 622-2823
Gregory Castillo, MD
9040 Telegraph Rd Ste 102,
Downey, CA 90240-2395

Ph: (562) 861-0954

Reviews and Comments


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Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

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