Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Dr. Tamara L Holzer, DO

Individual provider Surgery Physician · NPI 1952518144

Dr. Tamara L Holzer, DO practises General Surgery in Mount Vernon, Ohio. Qualified in 2005, 21 years ago. Practices with Knox Community Hospital, a 117-clinician group and accepts Medicare assignment. Licensed in Iowa, Ohio and Wisconsin.

Years since qualifying
21
Licensed in
IA, OH, WI
In the registry since
2007
Specialties on file
4
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

1330 Coshocton Ave
Mount Vernon, OH 43050
Phone: (740) 393-9000
Fax: (740) 392-0167
Show map & directions

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

Specialties & licences

Surgery Physician (primary) Taxonomy 208600000X · Licence 34013954 (OH)
Surgery Physician Taxonomy 208600000X · Licence 58-001860 (OH)
Surgery Physician Taxonomy 208600000X · Licence 56098 (WI)
Surgery Physician Taxonomy 208600000X · Licence 4198 (IA)

Record details

NPI number1952518144
Entity typeIndividual (Type 1)
GenderFemale
Credentials DO
Sole proprietorNo
NPI enumeratedMay 17, 2007
Last updated in NPPESMarch 9, 2021
Certification dateMarch 9, 2021

Medicare enrollment

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

Medicare specialtyGENERAL SURGERY
Medical schoolOTHER
Graduated 2005 (21 years in practice)
Group practice Knox Community Hospital — 117 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.

Colonoscopy 11 times · 41st percentile
Mastectomy 1–10 times
Melanoma (skin cancer) excision 1–10 times
Skin biopsy 1–10 times
Upper gastrointestinal (GI) endoscopy for acid reflux 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 patients171
Services billed 425 a service is one billed item, such as a visit, a test or a procedure
Average patient age72

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.

Colleagues at Knox Community Hospital

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 117 clinicians in the practice; 12 are shown here.

Other providers in Mount Vernon