Mark R. Fox, M.D.
Internal Medicine Physician · Findlay, OH
Mark R. Fox, M.D. is an internal medicine physician with a practice address in Findlay, Ohio, and NPI 1831147560, issued on May 5, 2006. Check the license (Ohio 35.071711, as entered in NPPES) on the State Medical Board of Ohio; the Medicare figures below come from public CMS files.
- Name
- Mark R. Fox
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 35.071711 OH
Self-reported in NPPES; status is on the state search - Practice location
- 200 W Pearl St, Findlay, OH 45840
- Phone
- (419) 424-0380
- Enumerated
- May 5, 2006
- Record last updated
- Aug 23, 2012 (not updated in 14 years: call before relying on the address or phone)
- Medicaid ID
- 2000953 OH
- Medicare enrollment
- Enrolled (PECOS I20100301000853); accepts Medicare assignment
- Medical or professional school
- Michigan State University College Of Human Medicine, 1993
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 5,277 in Ohio → Look up another NPI →
Also registered at 200 W Pearl St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Bruce Bouts, M.D.Internal Medicine Physician1164488268
- Michael Cairns, M.D.Dermatology Physician1831147594
- Erica Duling, PHARMDPharmacist1942500053
- Belinda Ernst, PA-CPhysician Assistant1295784981
- Gregory Gerschutz, M.D.Cardiovascular Disease Physician1750339578
Verify Mark R. Fox in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersState Medical Board of Ohio
Search for license 35.071711Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4.9 times the Medicare Part D claims of the average internal medicine physician in 2024
15,577 Medicare Part D claims for 1,038 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 316 claims were for opioids.
Most prescribed
- Atorvastatin Calcium972 claims
- Lisinopril682 claims
- Omeprazole661 claims
- Levothyroxine Sodium624 claims
- Amlodipine Besylate539 claims
- Metoprolol Tartrate470 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): 79.1 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).
Industry payments in 2024: $610.88
16 payments; by number, the most common kind was food and beverage; the largest payer was Alexion Pharmaceuticals, Inc. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Blanchard Valley Medical Associates, IncFindlay, OH
- Northern Ohio Medical Specialists, LLCSandusky, OH
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark R. Fox among 5,277 internal medicine physician records in Ohio
Mark R. Fox, M.D. is one of 5,277 internal medicine physician records with a practice address in Ohio. 81% 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 13% of them.
- NPI issued2006 · 13% of these records are older, 55% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 65% of these records are
- Graduated1993 · median 2006 among the 3,414 with a school on file
- Record last updated2012 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Ohio practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Internal Medicine Physician providers in Ohio
There are 5,277 internal medicine physician records in Ohio.
All 5,277 in Ohio → Every provider in Findlay → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Muhammad AhmadFindlay, OH 458401184016073
- Bruce Bouts, M.D.Findlay, OH 458401164488268
- Pingali Chandra Mohan, M.DFindlay, OH 458401558509109
- Daniel Dawley, MDFindlay, OH 458401548258312
- Peter Fass, M.D.Findlay, OH 458401639448301
- Angela Harden-Mack, M.D.Findlay, OH 458401750383840
- Gary Hirschfeld, M.D.Findlay, OH 458401285682823
- Lisa Knor, M.D.Findlay, OH 458401174581631
Common questions
What is Mark R. Fox, M.D.'s NPI number?
Mark R. Fox, M.D.'s National Provider Identifier (NPI) is 1831147560, issued on May 5, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark R. Fox, M.D. located?
The NPPES record lists a practice address at 200 W Pearl St, Findlay, OH, 45840. Phone: (419) 424-0380. Providers update this record themselves, so call before visiting.
How can I verify Mark R. Fox, M.D.'s license?
NPPES lists Ohio license number 35.071711, as entered by the provider. Search the State Medical Board of Ohio at https://elicense.ohio.gov/oh_verifylicense. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mark R. Fox, M.D. prescribe under Medicare Part D?
In 2024, Mark R. Fox, M.D. had 15,577 Medicare Part D claims for 1,038 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Mark R. Fox, M.D.'s MIPS final score?
The 2023 MIPS final score is 79.1 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.