Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Kathleen Mary Hertzer, MD

Individual provider Surgery Physician · NPI 1467778217

Kathleen Mary Hertzer, MD practises General Surgery in Santa Cruz, California. Graduated from Indiana University School of Medicine in 2010, 16 years ago. Practices with Sutter Bay Medical Foundation, a 3,762-clinician group, works from 4 locations and accepts Medicare assignment. Licensed in California.

Years since qualifying
16
Trained at
Indiana University School of Medicine
Licensed in
CA
In the registry since
2010
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

2911 Chanticleer Ave
Santa Cruz, CA 95065-1815
Phone: (831) 477-2350
Show map & directions

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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (3)

  • Department Of Surgery At Ucla, Los Angeles, CA 90095-0001 — (310) 825-6643
  • Department Of Surgery At Ucla, Los Angeles, CA 90095-0001 — (310) 825-6643
  • 1095 Marshall Way Ste 202, Placerville, CA 95667-5722 — (530) 626-3682

Specialties & licences

Surgery Physician (primary) Taxonomy 208600000X · Licence A121173 (CA)

Record details

NPI number1467778217
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 19, 2010
Last updated in NPPESApril 7, 2023
Certification dateApril 7, 2023

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyGENERAL SURGERY
Medical schoolINDIANA UNIVERSITY SCHOOL OF MEDICINE
Graduated 2010 (16 years in practice)
Group practice Sutter Bay Medical Foundation — 3762 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Hernia repair (minimally invasive) 16 times · 84th percentile
Mastectomy 15 times · 72nd percentile
Colonoscopy 1–10 times
Hernia repair - groin (open) 1–10 times
Melanoma (skin cancer) excision 1–10 times

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients222
Services billed 466 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Colleagues at Sutter Bay Medical Foundation

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 3762 clinicians in the practice; 12 are shown here.

Other providers in Santa Cruz