Tammy Winchell, A.R.N.P
NPI 1679673347 · Pediatric Nurse Practitioner · Mill Valley, CA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Tammy Winchell, A.R.N.P is a Pediatric Nurse Practitioner provider in Mill Valley, CA (NPI 1679673347).
Provider details
- NPI number
- 1679673347
- Entity type
- Individual
- Primary specialty
- Pediatric Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- A.R.N.P
- Sex
- Female
- Sole proprietor
- No
- License
- NP95000700 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
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
3 documented practice locations
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
Additional practice locations (2)
- 1201 W La Veta AveOrange, CA 92868-4203Phone: (714) 509-7601Fax: (714) 509-7650
- 1201 W La Veta AveOrange, CA 92868-4203Phone: (714) 509-7601Fax: (714) 509-7650
Registry dates
- Enumerated
- 2006-09-23
- Last updated
- 2025-06-06
- Certified
- 2025-06-06
Frequently asked questions
- What is Tammy Winchell's NPI number?
- Tammy Winchell's National Provider Identifier (NPI) is 1679673347, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Tammy Winchell's specialty?
- Tammy Winchell is listed in the NPPES registry with a primary specialty of Pediatric Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Tammy Winchell located?
- Tammy Winchell's practice location on file with NPPES is 750 Redwood Hwy Frontage Rd Ste 1204, Mill Valley, CA 94941-2483.
- What is Tammy Winchell's phone number?
- The practice phone number listed in the NPPES registry for Tammy Winchell is (415) 384-4778.
- Does Tammy Winchell accept Medicare?
- Tammy Winchell is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Tammy Winchell's NPI active?
- Yes — Tammy Winchell's NPI (1679673347) is active in the NPPES registry as of the last update on 2025-06-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.