Dr. Tamara L. Holzer, DO
- Medicare services, 2024
- 314
- Medicare patients, 2024
- 171
- Part D claims, 2024
- 402
- Hospital affiliations
- 1
- Industry payments
- $12,306
- Practice address
- 1330 Coshocton Road, Mount Vernon, OH 43050
- Practice phone
- Call (740) 393-9000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Holzer's professional email, personal email and mobile number
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Dr. Tamara L. Holzer is a general surgeon in Mount Vernon, Ohio
Dr. Holzer practices at Knox Community Hospital in Mount Vernon, Ohio, part of Knox Community Hospital.
Dr. Holzer's NPI, 1952518144, was assigned on May 17, 2007. Dr. Holzer holds Ohio license 34013954.
- NPI
- 1952518144NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4486823481
- NPI enumeration date
- May 17, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (740) 393-9000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 47
- Medical school graduation
- 2005
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Tamara L. Holzer practices at Knox Community Hospital in Mount Vernon, Ohio
Dr. Holzer's primary practice is Knox Community Hospital, at 1330 Coshocton Road, Mount Vernon, OH 43050 in Knox County. The practice phone is (740) 393-9000.
- Knox Community Hospital1330 Coshocton Road, Mount Vernon, OH 43050 · Knox CountyPhone(740) 393-9000
Source: Dmand AI Affiliation Data
Dr. Tamara L. Holzer is affiliated with 1 site of care and 1 medical group
Dr. Holzer's primary practice is Knox Community Hospital in Mount Vernon, Ohio, part of Knox Community Hospital. The medical group on file is Knox Community Hospital. Dr. Holzer's employer is on file too: a hospital.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Tamara L. Holzer's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Holzer practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Knox Community Hospital | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Knox Community Hospital and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Tamara L. Holzer is one of 1,056 general surgeons in Ohio
Surgery is Dr. Holzer's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dmand AI has Dr. Holzer's licenses on file in 3 states: Ohio, Iowa and Wisconsin.
Specialties and state licenses
- Surgery, OhioPrimary
- Iowa license
- Wisconsin license
General surgeons near Dr. Holzer
Counts of general surgeons with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Tamara L. Holzer billed Medicare for 314 services in 2024
CMS data shows 314 Medicare services from Dr. Holzer across 9 procedure codes in 2024, for 171 Medicare patients. Medicare paid $21,076 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Holzer's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 3202024: 25720%
- Surgery
- 2023: 882024: 5735%
Dr. Holzer compared with the Ohio median for general surgeons, 2024
- Dr. Holzer
- Ohio median
- Medicare services
- 314vs 16887% above
- Medicare patients
- 171vs 12735% above
- Part D claims
- 335vs 467.3 times
Medians across 1,031 general surgeons in Ohio with Dmand AI profiles that report each measure.
Dr. Holzer's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Holzer and other general surgeons in Ohio.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Tamara L. Holzer treated 171 Medicare patients in 2024, average age 72
CMS counts 171 Medicare patients who saw Dr. Holzer in 2024. The largest group is 65 to 74, with 78 patients. 73% of them have high blood pressure, and 65% have high cholesterol. 15% are also on Medicaid. Their average risk score is 1.37, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Holzer's median patient age at 67, with 76% women.
Dr. Holzer's Medicare patients by age, 2024
Dr. Holzer's Medicare patients by sex, 2024
- Women11869%
- Men5331%
Chronic conditions among Dr. Holzer's Medicare patients, 2024
- High blood pressure73%
- High cholesterol65%
- Arthritis57%
- Ischemic heart disease36%
- Mood disorders33%
- Anxiety29%
- Depression29%
- Cancer27%
Share of Medicare patients with each condition. A patient can have several.
Dr. Holzer's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 67
Patient panel by sex, all payers
- Women76%
- Men24%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Tamara L. Holzer wrote 402 Medicare Part D claims in 2024
In 2024, Dr. Holzer wrote 402 Medicare Part D claims for 127 patients. 99% of them were for generic drugs. CMS names the drug for 335 of them, across 4 drugs with 11 or more claims each, at $1,761 in total drug cost. In 2023, CMS named 281 claims across 6 drugs.
Dr. Holzer's Part D claims by kind of drug, 2024
- Generic399 claims99%
- Brand-name and other3 claims1%
Dr. Holzer's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Holzer's Part D claims, 2024
- Opioids10%41 of 402 claims
- Antibiotics5%19 of 402 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 2812024: 33519%
Drugs named by CMS: 4 in 2024, 6 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Tamara L. Holzer takes part in Medicare
Dr. Holzer accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Colonoscopy: 1 to 10 procedures (CMS shows small counts as a range)
Mastectomy: 1 to 10 procedures (CMS shows small counts as a range)
Melanoma (skin cancer) excision: 1 to 10 procedures (CMS shows small counts as a range)
Removal of tissue: 1 to 10 procedures (CMS shows small counts as a range)
Skin biopsy: 1 to 10 procedures (CMS shows small counts as a range)
Upper gastrointestinal (GI) endoscopy for acid reflux: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Tamara L. Holzer received $12,306 in industry payments from 2017 to 2023
CMS Open Payments shows 50 general payments to Dr. Holzer from 9 drug and device companies from 2017 to 2023. Education make up the largest share, 57% of the total. Intuitive Surgical, Inc. paid the most, $9,850.
General payments to Dr. Holzer by program year, 2017 to 2023
General payments to Dr. Holzer by kind, 2017 to 2023
- Education$7,00057%
- Travel and lodging$4,18734%
- Food and beverage$1,1189%
Companies that paid Dr. Holzer the most, 2017 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Tamara L. Holzer's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Tamara L. Holzer
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Tamara L. Holzer's NPI number?
Dr. Tamara L. Holzer's NPI number is 1952518144. It was assigned on May 17, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Tamara L. Holzer?
Dr. Tamara L. Holzer is a general surgeon in Mount Vernon, Ohio. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. Tamara L. Holzer practice?
Dr. Holzer practices at 1330 Coshocton Road, Mount Vernon, OH 43050. Dr. Holzer's primary practice is Knox Community Hospital in Mount Vernon, Ohio, part of Knox Community Hospital.
What is Dr. Tamara L. Holzer's office phone number?
The practice phone on file for Dr. Holzer is (740) 393-9000.
What is Dr. Tamara L. Holzer's medical license number?
Dr. Holzer holds Ohio license 34013954, one of the licenses on file in 3 states.
Which states has Dr. Tamara L. Holzer been licensed in?
Dmand AI has state licenses on file for Dr. Holzer in Ohio, Iowa and Wisconsin.
Which hospitals is Dr. Tamara L. Holzer affiliated with?
Dr. Holzer practices at Knox Community Hospital in Mount Vernon, Ohio.
What medical group is Dr. Tamara L. Holzer part of?
Dr. Holzer is linked to Knox Community Hospital.
Does Dr. Tamara L. Holzer accept Medicare?
Yes. CMS data shows Dr. Holzer billed Medicare for 314 services in 2024, and Dr. Holzer accepts Medicare assignment.
How many Medicare patients does Dr. Tamara L. Holzer see?
CMS counts 171 Medicare patients who saw Dr. Holzer in 2024, with an average age of 72.
Show 4 more questionsShow fewer questions
What services does Dr. Tamara L. Holzer bill to Medicare?
In 2024, Dr. Holzer's most billed Medicare services were office visit, established patient (99213), office visit, established patient (99214) and hospital inpatient care (99232).
What drugs does Dr. Tamara L. Holzer prescribe most?
In 2024 Medicare Part D data, Dr. Holzer's most prescribed drugs by claims were Pantoprazole Sodium, Omeprazole and Ibuprofen.
Has Dr. Tamara L. Holzer received payments from drug or device companies?
CMS Open Payments shows $12,306 in general payments to Dr. Holzer from 9 companies from 2017 to 2023. The largest total came from Intuitive Surgical, Inc.
How long has Dr. Tamara L. Holzer been practicing?
Dr. Holzer graduated from medical school in 2005, 21 years ago.
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