Karen Marie Tierney, M.D.
Family Medicine Physician · Monterey, CA
Karen Marie Tierney, M.D. is a family medicine physician with a practice address in Monterey, California, and NPI 1477756658, issued on Jun 6, 2007. Check the license (California G42421, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Karen Marie Tierney
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- G42421 CA
Self-reported in NPPES; status is on the state search - Practice location
- 530 Ramona Ave, Monterey, CA 93940
- Phone
- (831) 647-8700
- Enumerated
- Jun 6, 2007
- Record last updated
- Mar 5, 2010 (not updated in 16 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 530 Ramona Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- James Vawter, M.D.Family Medicine Physician1447453634
Verify Karen Marie Tierney in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G42421Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average family medicine physician in 2024
30 Medicare Part D claims for 16 beneficiaries, against an average of 3,544 among the 117,163 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.
Karen Marie Tierney among 17,133 family medicine physician records in California
Karen Marie Tierney, M.D. is one of 17,133 family medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 41% of them.
- NPI issued2007 · 41% of these records are older, 47% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 62% of these records are
- Record last updated2010 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
47 family medicine physician records list a practice address in Monterey
They are 47 of the 1,945 NPPES records with a practice address in Monterey, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Monterey → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Lisa Dwelle, MDMonterey, CA 939401821021296
- Jay Edmonds, MDMonterey, CA 939401619944881
- Richard Gilliam, M.D.Monterey, CA 939401891791265
- Ken Hashimoto, M.D.Monterey, CA 939401831179712
- Michael Hendrick, MDMonterey, CA 939401568492015
- Gerard Issvoran, DOMonterey, CA 939401558350272
- Harvey Kryger, M.D.Monterey, CA 939401417940925
- Cindy Lee, MDMonterey, CA 939401306814256
Common questions
What is Karen Marie Tierney, M.D.'s NPI number?
Karen Marie Tierney, M.D.'s National Provider Identifier (NPI) is 1477756658, issued on Jun 6, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Karen Marie Tierney, M.D. located?
The NPPES record lists a practice address at 530 Ramona Ave, Monterey, CA, 93940. Phone: (831) 647-8700. Providers update this record themselves, so call before visiting.
How can I verify Karen Marie Tierney, M.D.'s license?
NPPES lists California license number G42421, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Karen Marie Tierney, M.D. prescribe under Medicare Part D?
In 2024, Karen Marie Tierney, M.D. had 30 Medicare Part D claims for 16 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.