NPPES file of Aug 9, 2026

Gianna Krystal Flaaten, NP-C

Nurse Practitioner · Castro Valley, CA

Gianna Krystal Flaaten, NP-C is a nurse practitioner with a practice address in Castro Valley, California, and NPI 1275241119, issued on Nov 9, 2022. Check the license (California 95020792, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1275241119
Name
Gianna Krystal Flaaten
Credential
NP-C
Primary taxonomy
Nurse Practitioner 363L00000X
License number
95020792 CA
Self-reported in NPPES; status is on the state search
Practice location
20401 Santa Maria Ave, Castro Valley, CA 94546
Phone
(510) 216-1086
Enumerated
Nov 9, 2022
Record last updated
Mar 14, 2026
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest nurse practitioner records → All 8,223 in California → Look up another NPI →

Verify Gianna Krystal Flaaten in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich California board licenses this profession
    Search for license 95020792    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the California license search

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Industry payments in 2024: $149.79

4 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 38,884 providers of this specialty with any payment received $791.64 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Gianna Flaaten$149.79
  2. Specialty average$791.64

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Gianna Krystal Flaaten among 8,223 nurse practitioner records in California

Gianna Krystal Flaaten, NP-C is one of 8,223 nurse practitioner records with a practice address in California. 65% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2022, is newer than 77% of them.

  • NPI issued2022 · 77% of these records are older, 18% newer
  • In a Medicare fileYes · 65% of these records are
  • In the CMS Doctors and Clinicians fileNo · 42% of these records are
  • Record last updated2026 · 45% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363L00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Nurse Practitioner providers in California

There are 8,223 nurse practitioner records in California.

All 8,223 in California → Every provider in Castro Valley → Nurse Practitioner nationwide →

The 8 nurse practitioner records with the nearest ZIP codes

  1. Gahfora Gorsi, NPCastro Valley, CA 945461225696396
  2. Heather KurzCastro Valley, CA 945461619515830
  3. Inna Lipkind, NPCastro Valley, CA 945461407563331
  4. Jacqueline Margolese, MSN, FNP-C, AG-ACNPCastro Valley, CA 945461205378668
  5. Lynne Orr, NPCastro Valley, CA 945461235698713
  6. Kathryn Simms, NPCastro Valley, CA 945461447770359
  7. Yalda Bahrani, FNP-CHayward, CA 945451770182388
  8. Ann Bonner, FNP-BCHercules, CA 945471477102515

Common questions

What is Gianna Krystal Flaaten, NP-C's NPI number?

Gianna Krystal Flaaten, NP-C's National Provider Identifier (NPI) is 1275241119, issued on Nov 9, 2022. An NPI identifies a provider in billing; it is not a license.

Where is Gianna Krystal Flaaten, NP-C located?

The NPPES record lists a practice address at 20401 Santa Maria Ave, Castro Valley, CA, 94546. Phone: (510) 216-1086. Providers update this record themselves, so call before visiting.

How can I verify Gianna Krystal Flaaten, NP-C's license?

NPPES lists California license number 95020792, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.