Mark Wills, MD
NPI 1063525715 · Emergency Medicine Physician · Sonoma, CA
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Wills, MD is a Emergency Medicine Physician provider in Sonoma, CA (NPI 1063525715).
Provider details
- NPI number
- 1063525715
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- G63295 (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
19 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
- 2006-08-16
- Last updated
- 2008-07-07
Frequently asked questions
- What is Mark Wills's NPI number?
- Mark Wills's National Provider Identifier (NPI) is 1063525715, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Wills's specialty?
- Mark Wills is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Wills located?
- Mark Wills's practice location on file with NPPES is 347 Andrieux Street, Sonoma, CA 95476-6811.
- What is Mark Wills's phone number?
- The practice phone number listed in the NPPES registry for Mark Wills is (707) 935-5100.
- Does Mark Wills accept Medicare?
- Mark Wills is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Wills's NPI active?
- Yes — Mark Wills's NPI (1063525715) is active in the NPPES registry as of the last update on 2008-07-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.