Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Donald Gratton Downs, MD

Individual provider Family Medicine Physician · NPI 1568451979

Donald Gratton Downs, MD is registered under Family Practice in Simi Valley, California. Graduated from University of California, San Diego School of Medicine in 1986, 40 years ago. Practices with Providence Facey Medical Foundation, a 323-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
40
Trained at
University of California, San Diego School of Medicine
Licensed in
CA
In the registry since
2005
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

2655 1st St
Simi Valley, CA 93065-1547 Not confirmed with CMS for 12 years — call before visiting
Phone: (805) 206-2000
Fax: (805) 577-1270
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence G61850 (CA)

Record details

NPI number1568451979
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 18, 2005
Last updated in NPPESApril 3, 2014

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyFAMILY PRACTICE
Medical schoolUNIVERSITY OF CALIFORNIA, SAN DIEGO SCHOOL OF MEDICINE
Graduated 1986 (40 years in practice)
Group practice Providence Facey Medical Foundation — 323 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients111
Services billed 612 a service is one billed item, such as a visit, a test or a procedure
Average patient age72

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Colleagues at Providence Facey Medical Foundation

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 323 clinicians in the practice; 12 are shown here.

Other providers in Simi Valley