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

Ann Lockhart

Individual provider Family Medicine Physician · NPI 1639219876

Ann Lockhart is registered under Family Practice in Martinez, California. Graduated from University of California, San Diego School of Medicine in 2001, 25 years ago. Practices with John Muir Physician Network, a 486-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in California.

Years since qualifying
25
Trained at
University of California, San Diego School of Medicine
Licensed in
CA
In the registry since
2007
Claim this listing Report a problem Suggest an edit

Practice location Address checks out

2500 Alhambra Ave
Martinez, CA 94553-3156
Phone: (925) 370-5110
Fax: (925) 370-5142
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 1450 Treat Blvd # 320, Walnut Creek, CA 94597-2168 — (925) 296-9880

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence A80812 (CA)

Record details

NPI number1639219876
Entity typeIndividual (Type 1)
GenderFemale
Sole proprietorYes
NPI enumeratedFebruary 7, 2007
Last updated in NPPESMarch 23, 2020
Certification dateMarch 23, 2020

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 2001 (25 years in practice)
Group practice John Muir Physician Network — 486 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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 patients24
Services billed 30 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

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 John Muir Physician Network

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 486 clinicians in the practice; 12 are shown here.

Other providers in Martinez