Vivien T. Thach, FNP-C, AGNP-C
Nurse Practitioner · Anaheim, CA
Vivien T. Thach, FNP-C, AGNP-C is a nurse practitioner with a practice address in Anaheim, California, and NPI 1427416841, issued on Jan 29, 2016. Check the license (California 95003756, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Vivien T. Thach
- Credential
- FNP-C, AGNP-C
- Primary taxonomy
- Nurse Practitioner 363L00000X
- License number
- 95003756 CA
Self-reported in NPPES; status is on the state search - Practice location
- 4330 E Miraloma Ave, Anaheim, CA 92807
- Phone
- (714) 675-2184
- Enumerated
- Jan 29, 2016
- Record last updated
- Jan 29, 2026
- Medicare enrollment
- Enrolled (PECOS I20160602002269); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest nurse practitioner records → All 8,223 in California → Look up another NPI →
Verify Vivien T. Thach in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 95003756Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
74% fewer Medicare Part D claims than the average nurse practitioner in 2024
286 Medicare Part D claims for 211 beneficiaries, against an average of 1,109 among the 54,319 providers of this specialty who prescribed in Part D. Brand-name drugs were 26% of claims.
Most prescribed
- Albuterol Sulfate Hfa33 claims
- Paxlovid33 claims
- Nitrofurantoin Mono-Macro26 claims
- Prednisone25 claims
- Paxlovid (Eua)17 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $31.90
1 payment: food and beverage; the largest payer was Amgen 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.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Southern California Permanente Medical GroupAnaheim, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Vivien T. Thach among 8,223 nurse practitioner records in California
Vivien T. Thach, FNP-C, AGNP-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 2016, is newer than 48% of them.
- NPI issued2016 · 48% of these records are older, 48% newer
- In a Medicare fileYes · 65% of these records are
- In the CMS Doctors and Clinicians fileYes · 42% of these records are
- Graduated2015 · median 2017 among the 3,425 with a school on file
- 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).
95 nurse practitioner records list a practice address in Anaheim
They are 95 of the 9,018 NPPES records with a practice address in Anaheim, and 8,223 nurse practitioner records in California.
All 8,223 in California → Every provider in Anaheim → Nurse Practitioner nationwide →
The 8 nurse practitioner records with the nearest ZIP codes
- Donna Amezquita, NPAnaheim, CA 928071255402145
- Sandra Anderson, NPAnaheim, CA 928071528135381
- Terisa Brown-Sienko, NPAnaheim Hills, CA 928071629081138
- Tina Carrillo, NPAnaheim, CA 928071083781850
- Gretchen Devine, NPAnaheim, CA 928071538236302
- Masayuki Fukuzawa, NPAnaheim, CA 928071669549424
- Mary Harris, NPAnaheim, CA 928071699842468
- Siulan Hsieh, NPAnaheim, CA 928071144391038
Common questions
What is Vivien T. Thach, FNP-C, AGNP-C's NPI number?
Vivien T. Thach, FNP-C, AGNP-C's National Provider Identifier (NPI) is 1427416841, issued on Jan 29, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Vivien T. Thach, FNP-C, AGNP-C located?
The NPPES record lists a practice address at 4330 E Miraloma Ave, Anaheim, CA, 92807. Phone: (714) 675-2184. Providers update this record themselves, so call before visiting.
How can I verify Vivien T. Thach, FNP-C, AGNP-C's license?
NPPES lists California license number 95003756, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Vivien T. Thach, FNP-C, AGNP-C prescribe under Medicare Part D?
In 2024, Vivien T. Thach, FNP-C, AGNP-C had 286 Medicare Part D claims for 211 beneficiaries; the average among nurse practitioner prescribers was 1,109. Part D covers Medicare prescriptions 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.
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.