Tonia Fox, MD
NPI 1023050242 · Emergency Medicine Physician · Palo Alto, CA
Enrolled with Medicare as Order and Referring Only - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Tonia Fox, MD is a Emergency Medicine Physician provider in Palo Alto, CA (NPI 1023050242).
Provider details
- NPI number
- 1023050242
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- A72256 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-06-12
- Last updated
- 2007-07-08
Frequently asked questions
- What is Tonia Fox's NPI number?
- Tonia Fox's National Provider Identifier (NPI) is 1023050242, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Tonia Fox's specialty?
- Tonia Fox is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Tonia Fox located?
- Tonia Fox's practice location on file with NPPES is 3801 Miranda Ave, Palo Alto, CA 94304-1207.
- What is Tonia Fox's phone number?
- The practice phone number listed in the NPPES registry for Tonia Fox is (650) 493-5000.
- Does Tonia Fox accept Medicare?
- Tonia Fox is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Tonia Fox's NPI active?
- Yes — Tonia Fox's NPI (1023050242) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.