Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Monica Nicole Gaines Stiles, DO

Individual provider Hospitalist Physician · NPI 1811524507

Monica Nicole Gaines Stiles, DO is a Hospitalist in Walnut Creek, California. Qualified in 2020, 6 years ago. Practices with John Muir Physician Network, a 486-clinician group, works from 3 locations and accepts Medicare assignment. Licensed in California.

Years since qualifying
6
Licensed in
CA
In the registry since
2020
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

1601 Ygnacio Valley Rd
Walnut Creek, CA 94598-3122
Phone: (925) 947-3393
Fax: (925) 947-3396
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 2700 Grant St Ste 200, Concord, CA 94520-2270 — (925) 947-3312
  • 2540 East St, Concord, CA 94520-1906 — (925) 674-2609

Specialties & licences

Hospitalist Physician (primary) Taxonomy 208M00000X · Licence 20A20496 (CA)

Record details

NPI number1811524507
Entity typeIndividual (Type 1)
GenderFemale
Credentials DO
Sole proprietorNo
NPI enumeratedMarch 24, 2020
Last updated in NPPESJune 18, 2026
Certification dateJune 18, 2026

Medicare enrollment

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

Medicare specialtyHOSPITALIST
Medical schoolOTHER
Graduated 2020 (6 years in practice)
Group practice John Muir Physician Network — 486 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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