Thais Marek, FNP
Family Nurse Practitioner · Grass Valley, CA
Thais Marek, FNP is a family nurse practitioner with a practice address in Grass Valley, California, and NPI 1972087658, issued on Sep 19, 2018. Check the license (California 95009276, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Thais Marek
- Credential
- FNP
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License number
- 95009276 CA
Self-reported in NPPES; status is on the state search - Practice location
- 155 Glasson Way, Grass Valley, CA 95945
- Phone
- (530) 274-6000
- Enumerated
- Sep 19, 2018
- Record last updated
- Sep 11, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20240708000367); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 16,966 in California → Look up another NPI →
Also registered at 155 Glasson Way
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Thais Marek in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 95009276Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
97% fewer Medicare Part D claims than the average family nurse practitioner in 2024
35 Medicare Part D claims for 24 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D.
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.
Bills Medicare through one group practice
- Chapa-DE Indian Health Program, Inc.Grass Valley, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Thais Marek among 16,966 family nurse practitioner records in California
Thais Marek, FNP is one of 16,966 family nurse practitioner records with a practice address in California. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 45% of them.
- NPI issued2018 · 45% of these records are older, 50% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 40% of these records are
- Graduated2018 · median 2019 among the 6,793 with a school on file
- Record last updated2020 · 42% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LF0000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
21 family nurse practitioner records list a practice address in Grass Valley
They are 21 of the 1,540 NPPES records with a practice address in Grass Valley, and 16,966 family nurse practitioner records in California.
All 16,966 in California → Every provider in Grass Valley → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- Sarah BlandGrass Valley, CA 959451548781495
- Margo BolanderGrass Valley, CA 959451386091361
- Susan Claydon, N.P.Grass Valley, CA 959451336147057
- Jed ColvinGrass Valley, CA 959451528315538
- Ruth Cutter, N.P.Grass Valley, CA 959451033232012
- Agnes Felicano, NPGrass Valley, CA 959451932413796
- Rebecca Kauk, FNPGrass Valley, CA 959451295263648
- Kathlee Martin, APNGrass Valley, CA 959451497944789
Common questions
What is Thais Marek, FNP's NPI number?
Thais Marek, FNP's National Provider Identifier (NPI) is 1972087658, issued on Sep 19, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Thais Marek, FNP located?
The NPPES record lists a practice address at 155 Glasson Way, Grass Valley, CA, 95945. Phone: (530) 274-6000. Providers update this record themselves, so call before visiting.
How can I verify Thais Marek, FNP's license?
NPPES lists California license number 95009276, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Thais Marek, FNP prescribe under Medicare Part D?
In 2024, Thais Marek, FNP had 35 Medicare Part D claims for 24 beneficiaries; the average among family nurse practitioner prescribers was 1,305. 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.