NPPES file of Aug 9, 2026

Kathleen Mary Hertzer, M.D.

Surgery Physician · Santa Cruz, CA

Kathleen Mary Hertzer, M.D. is a surgery physician with a practice address in Santa Cruz, California, and NPI 1467778217, issued on Apr 19, 2010. Check the license (California A121173, as entered in NPPES) on the Medical Board of California; 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
1467778217
Name
Kathleen Mary Hertzer
Credential
M.D.
Primary taxonomy
Surgery Physician 208600000X
License number
A121173 CA
Self-reported in NPPES; status is on the state search
Practice location
2911 Chanticleer Ave, Santa Cruz, CA 95065
Phone
(831) 477-2350
Enumerated
Apr 19, 2010
Record last updated
Apr 7, 2023
Medicare enrollment
Enrolled (PECOS I20121219000281); accepts Medicare assignment
Medical or professional school
Indiana University School Of Medicine, 2010
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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Also registered at 2911 Chanticleer Ave

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Stephanie Agoncillo, PA-CPhysician Assistant1427425172
  2. Michael Burns, PA-CSurgical Physician Assistant1588208698
  3. Kayla Cushner, CNMAdvanced Practice Midwife1518304013
  4. Rami Dakkuri, MDSpecialist1558318758
  5. Christopher Desimone, D.O.Surgery Physician1942620067
  6. Joseph FabrySurgery Physician1982684569

Verify Kathleen Mary Hertzer in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A121173    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
Open the California license search

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10% fewer Medicare Part D claims than the average surgery physician in 2024

132 Medicare Part D claims for 61 beneficiaries, against an average of 147 among the 20,115 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims. 49 claims were for opioids.

  1. Kathleen Hertzer132
  2. Specialty average147

Most prescribed

  1. Ondansetron Hcl48 claims
  2. Oxycodone Hcl47 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.

Bills Medicare through one group practice

  1. Sutter Bay Medical FoundationSanta Cruz, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (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 Santa Cruz →

Other surgery physician records in California

  1. Miriam Abaunza, M.D.Los Angeles, CA1538470778
  2. Hana Abdirahman, MDTemecula, CA1265288112
  3. Sherwin Abdoli, MDPetaluma, CA1508386442
  4. Mhdshafic Abdulkarim, MDOrange, CA1750174249
  5. Sarah Abdulla, M.D.Baldwin Park, CA1699200840
  6. Shoko Abe, M.D.Berkeley, CA1609178136
  7. Stuart Abel, M.D.Los Angeles, CA1750761516
  8. Elliot Abemayor, MDLos Angeles, CA1972527414
  9. Marc Abi Karam, MD, MSPalo Alto, CA1437846508
  10. Ali Abidali, DOGlendora, CA1861888794

Common questions

What is Kathleen Mary Hertzer, M.D.'s NPI number?

Kathleen Mary Hertzer, M.D.'s National Provider Identifier (NPI) is 1467778217, issued on Apr 19, 2010. An NPI identifies a provider in billing; it is not a license.

Where is Kathleen Mary Hertzer, M.D. located?

The NPPES record lists a practice address at 2911 Chanticleer Ave, Santa Cruz, CA, 95065. Phone: (831) 477-2350. Providers update this record themselves, so call before visiting.

How can I verify Kathleen Mary Hertzer, M.D.'s license?

NPPES lists California license number A121173, 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 Kathleen Mary Hertzer, M.D. prescribe under Medicare Part D?

In 2024, Kathleen Mary Hertzer, M.D. had 132 Medicare Part D claims for 61 beneficiaries; the average among surgery physician prescribers was 147. 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.

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.