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

Tammy Ann Winchell, ARNP

Individual provider Pediatric Nurse Practitioner · NPI 1679673347

Tammy Ann Winchell, ARNP is a Pediatric Nurse Practitioner in Mill Valley, California. Works from 3 locations. Licensed in California, Oregon and Washington.

Licensed in
CA, OR, WA
In the registry since
2006
Specialties on file
3
What do these letters mean?
ARNP — Advanced Registered Nurse Practitioner
The title some states use for an advanced practice nurse.

See every abbreviation used in this directory →

Practice location Address checks out

750 Redwood Hwy Frontage Rd Ste 1204
Mill Valley, CA 94941-2483
Phone: (415) 384-4778
Fax: (415) 384-4779
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 1201 W La Veta Ave, Orange, CA 92868-4203 — (714) 509-7601
  • 1201 W La Veta Ave, Orange, CA 92868-4203 — (714) 509-7601

Specialties & licences

Pediatric Nurse Practitioner (primary) Taxonomy 363LP0200X · Licence AP30007401 (WA)
Pediatric Nurse Practitioner Taxonomy 363LP0200X · Licence NP95000700 (CA)
Pediatric Nurse Practitioner Taxonomy 363LP0200X · Licence 201150050NP (OR)

Record details

NPI number1679673347
Entity typeIndividual (Type 1)
GenderFemale
Credentials ARNP
Sole proprietorNo
NPI enumeratedSeptember 23, 2006
Last updated in NPPESJune 6, 2025
Certification dateJune 6, 2025
Mailing address700 Ne 87th Ave Ste 110, Vancouver, WA 98664-4896

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