Cornerstone Primary Care · Walnut Creek, CA
Medical school Baylor College of Medicine
Training University of California, Davis and University of California, San Francisco
- Internal medicine
Primary care and cash-pay doctors in Walnut Creek, CA
Updated November 2026How we check doctors
Pins show each doctor's main office. Gold pins are in Walnut Creek, navy pins are nearby.
Ross Pirkle, MD
Internal Medicine physicianConcierge
Cornerstone Primary Care · Walnut Creek, CA
Medical school University of California, San Francisco
- Joint injection therapy
- Genetic screening guidance
- Wellness planning
Clemens Grosskinsky, MD
Reproductive Endocrinology and InfertilityConcierge
Rated 5.0 out of 55.010 reviews
The Permanente Medical Group Walnut Creek · Walnut Creek, CA
Compare cash-pay doctors in Walnut Creek, CA
Same order as the list above. A comparison, not a ranking.
| Doctor | Type | Education and training | Reviews |
|---|---|---|---|
| Robert A. Hardy, MD | Concierge · Internal Medicine physician | University of California, Davis and University of California, San Francisco | 5.0 (10) |
| Ross Pirkle, MD | Concierge · Internal Medicine physician | University of California, San Francisco | |
| Clemens Grosskinsky, MD | Concierge · Reproductive Endocrinology and Infertility | 5.0 (10) |
Questions about cash-pay doctors in Walnut Creek, CA
How many cash-pay doctors are in Walnut Creek?
FindMyDirectDoctor lists 23 cash-pay doctors in Walnut Creek, CA at 17 practices. 3 are direct primary care (DPC) doctors and 20 are listed under concierge or another cash-pay practice type. We last checked this list in November 2026.
Which specialties can I find?
The most common are family medicine (8), internal medicine (5), reproductive endocrinology and infertility (3), family medicine (3), and dermatology (2).
Which doctors offer telehealth?
10 of the 23 doctors list telehealth visits. Each profile says which visits are offered.
Are these doctors board certified?
We confirmed board certification for 10 doctors on this list. Each profile shows the board and the specialty.
How many of these doctors publish their fees?
3 of the 23 doctors have a fee we confirmed on the practice's own website. The fee is on each of their profiles.
What do patients say about them?
6 of the 23 doctors have patient reviews on FindMyDirectDoctor, 49 reviews in total. Each tile shows the doctor's rating and review count.
Do these doctors take insurance?
It depends on the practice. Many direct primary care and concierge practices charge a membership fee instead of billing insurance for office visits, and some also accept insurance. Each profile says how its practice works when the practice states it.