Mark A. Vierra, MD
Surgery Physician · Monterey, CA
Mark A. Vierra, MD is a surgery physician with a practice address in Monterey, California, and NPI 1295706448, issued on Jan 27, 2006. Check the license (California G59649, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Mark A. Vierra
- Credential
- MD
- Primary taxonomy
- Surgery Physician 208600000X
- License number
- G59649 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2 Upper Ragsdale Dr, Monterey, CA 93940
- Phone
- (831) 649-0808
- Enumerated
- Jan 27, 2006
- Record last updated
- Jan 11, 2010 (not updated in 16 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20040405001687); accepts Medicare assignment
- Medical or professional school
- Harvard Medical School, 1985
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest surgery physician records → All 3,118 in California → Look up another NPI →
Also registered at 2 Upper Ragsdale Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jon Benner, MDSurgery Physician1649241886
- Ashlee Blaine, DOPsychiatry Physician1225562028
- Ashley Bonina, NPPediatric Nurse Practitioner1558626952
- Pamela Breslin, RNPediatric Nurse Practitioner1992860639
- Janet Brown, M.D.Gynecology Physician1467532952
- Gerald Carnazzo, M.D.Family Medicine Physician1841208246
Verify Mark A. Vierra in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G59649Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.4 times the Medicare Part D claims of the average surgery physician in 2024
351 Medicare Part D claims for 133 beneficiaries, against an average of 147 among the 20,115 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 70 claims were for opioids.
Most prescribed
- Pantoprazole Sodium72 claims
- Tramadol Hcl58 claims
- Amoxicillin-Clavulanate Potass26 claims
- Olanzapine Odt16 claims
- Mounjaro15 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 77.8 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Montage Medical GroupMonterey, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark A. Vierra among 3,118 surgery physician records in California
Mark A. Vierra, MD is one of 3,118 surgery physician records with a practice address in California. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 55% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 61% of these records are
- Graduated1985 · median 2003 among the 1,901 with a school on file
- Record last updated2010 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208600000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Surgery Physician providers in California
There are 3,118 surgery physician records in California.
All 3,118 in California → Every provider in Monterey → Surgery Physician nationwide →
The 8 surgery physician records with the nearest ZIP codes
- Jon Benner, MDMonterey, CA 939401649241886
- Michelle Brown, MDMonterey, CA 939401568474427
- Steve Chang, MDMonterey, CA 939401639376064
- Pamela Craig, M.D.Monterey, CA 939401558379818
- Zoltan Denes, M.D.Monterey, CA 939401831202647
- Richard Garza, MDMonterey, CA 939401982782017
- Jeffrey Hyde, MDMonterey, CA 939401801860549
- Michael Lurie, MDMonterey, CA 939401285605501
Common questions
What is Mark A. Vierra, MD's NPI number?
Mark A. Vierra, MD's National Provider Identifier (NPI) is 1295706448, issued on Jan 27, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark A. Vierra, MD located?
The NPPES record lists a practice address at 2 Upper Ragsdale Dr, Monterey, CA, 93940. Phone: (831) 649-0808. Providers update this record themselves, so call before visiting.
How can I verify Mark A. Vierra, MD's license?
NPPES lists California license number G59649, 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 Mark A. Vierra, MD prescribe under Medicare Part D?
In 2024, Mark A. Vierra, MD had 351 Medicare Part D claims for 133 beneficiaries; the average among surgery physician prescribers was 147. Part D covers Medicare prescriptions only.
What is Mark A. Vierra, MD's MIPS final score?
The 2023 MIPS final score is 77.8 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.