Doctor profile · Federal record

Dr. Gianna Flaaten, NP-C

Nurse Practitioner · Castro Valley, CA

  • NPI 1275241119
  • 4 yrs on file
  • Female
  • Group practice
  • No sanctions

Practice & contact

NPPES Updated May 11, 2026
Primary practice
20401 Santa Maria Ave
Castro Valley, CA 945465609
(510) 216-1086
Mailing address
4132 Krolop RD
Castro Valley, CA 945461220

Credentials & registration

NPPES · NUCC
NPI registered
November 2022 — 4 yrs on file
Profile last updated
March 14, 2026
Specialty taxonomy
363L00000X — NUCC code
State license (1)
California #95020792

Federal sanctions & exclusions

OIG LEIE Updated May 11, 2026

No sanctions, exclusions or revocations on file

Checked against OIG LEIE on NPI 1275241119. Last verified May 11, 2026.

Open Payments

Industry payments received

CMS Open Payments
All-time total
$150
Transactions
4
Manufacturers
1
Payer (manufacturer) Industry Txns Amount
Abbvie INC. 4 $149.79

By nature of payment

Food and Beverage
$150

Frequently asked questions

Auto-generated from federal data
What is Dr. Gianna Flaaten's medical specialty?
Dr. Gianna Flaaten practices Nurse Practitioner in Castro Valley, CA.
Where does Dr. Gianna Flaaten practice?
Dr. Gianna Flaaten practices at 20401 Santa Maria Ave, Castro Valley, CA 945465609. Office phone: 5102161086.
What is Dr. Gianna Flaaten's NPI?
Dr. Gianna Flaaten's National Provider Identifier (NPI) is 1275241119, issued by NPPES.