Dr. Mark R. Fox, MD
- Medicare services, 2024
- 14,567
- Medicare patients, 2024
- 671
- Part D claims, 2024
- 15,577
- MIPS score, 2024
- 88
- Hospital affiliations
- 2
- Practice address
- 2500 W Strub Rd, Sandusky, OH 44870
- Practice phone
- Call (419) 609-1112
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Northern Ohio Medical Specialists
Sandusky, Ohio
Find Dr. Fox's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Mark R. Fox is an internist in Sandusky, Ohio
Dr. Fox practices at Northern Ohio Medical Specialists in Sandusky, Ohio.
Dr. Fox's NPI, 1831147560, was assigned on May 5, 2006. Dr. Fox graduated from Michigan State University College of Human Medicine in 1993. Dr. Fox holds Ohio license 35.071711.
- NPI
- 1831147560NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6608965058
- NPI enumeration date
- May 5, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (419) 609-1112
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 59
- Medical school graduation
- 1993
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Mark R. Fox practices at Northern Ohio Medical Specialists in Sandusky, Ohio
Dr. Fox's primary practice is Northern Ohio Medical Specialists, at 2500 W Strub Rd, Sandusky, OH 44870 in Erie County. The practice phone is (419) 609-1112.
- Northern Ohio Medical Specialists2500 W Strub Rd, Sandusky, OH 44870 · Erie CountyPhone(419) 609-1112
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Mark R. Fox is affiliated with 7 sites of care and 3 medical groups
Dr. Fox's primary practice is Northern Ohio Medical Specialists in Sandusky, Ohio. Dr. Fox is also affiliated with Blanchard Valley Hospital. The medical group on file is NOMS Healthcare. Dmand AI also links Dr. Fox to 1 more hospital, 2 group practices and clinics, 2 home health agencies and 2 medical groups, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Mark R. Fox's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Fox practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Northern Ohio Medical Specialists | Available with a free account |
| +6 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Mark R. Fox is one of 4,708 internists in Ohio
Internal medicine is Dr. Fox's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Fox is licensed in Ohio.
Specialties and state licenses
- Internal medicine, OhioPrimary
Internists near Dr. Fox
Counts of internists 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. Mark R. Fox billed Medicare for 14,567 services in 2024
CMS data shows 14,567 Medicare services from Dr. Fox across 25 procedure codes in 2024, for 671 Medicare patients. Medicare paid $165,822 for them.
Dr. Fox's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Drugs given in the office
- 2023: 1,6932024: 11,367571%
- Office and hospital visits
- 2023: 2,4102024: 2,3134%
- Tests and treatments
- 2023: 5282024: 45115%
- Lab and pathology
- 2023: 1642024: 22940%
- Other services
- 2023: 1372024: 11318%
- Surgery
- 2023: 442024: 7775%
- Imaging
- 2023: 202024: 1715%
Where Dr. Fox's Medicare services took place, 2024
- In an office13,93396%
- In a facility6344%
Dr. Fox compared with the Ohio median for internists, 2024
- Dr. Fox
- Ohio median
- Medicare services
- 14,567vs 48729.9 times
- Medicare patients
- 671vs 1923.5 times
- Part D claims
- 14,879vs 29450.6 times
Medians across 4,703 internists in Ohio with Dmand AI profiles that report each measure.
Dr. Fox'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.
Need commercial claims for Dr. Fox?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Fox and other internists in Ohio.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Mark R. Fox treated 671 Medicare patients in 2024, average age 75
CMS counts 671 Medicare patients who saw Dr. Fox in 2024. The largest group is 65 to 74, with 300 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 5% are also on Medicaid. Their average risk score is 1.07, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Fox's median patient age at 71, with 46% women.
Dr. Fox's Medicare patients by age, 2024
Dr. Fox's Medicare patients by sex, 2024
- Women31146%
- Men36054%
Chronic conditions among Dr. Fox's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis40%
- Diabetes29%
- Atrial fibrillation25%
- Ischemic heart disease23%
- Anxiety20%
- Chronic kidney disease19%
Share of Medicare patients with each condition. A patient can have several.
Dr. Fox's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 71
Patient panel by sex, all payers
- Women46%
- Men53%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Mark R. Fox wrote 15,577 Medicare Part D claims in 2024
In 2024, Dr. Fox wrote 15,577 Medicare Part D claims for 1,038 patients. 88% of them were for generic drugs. CMS names the drug for 14,879 of them, across 187 drugs with 11 or more claims each, at $1,052,893 in total drug cost. In 2023, CMS named 14,518 claims across 178 drugs.
Dr. Fox's Part D claims by kind of drug, 2024
- Generic13,744 claims88%
- Brand-name1,761 claims11%
- Other72 claims0%
Dr. Fox'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. Fox's Part D claims, 2024
- Opioids2%316 of 15,577 claims
- Antibiotics2%306 of 15,577 claims
- Antipsychotics, patients 65 and over1%140 of 15,577 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: 14,5182024: 14,8792%
Drugs named by CMS: 187 in 2024, 178 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
Dr. Mark R. Fox scored 88 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 88 out of 100 for Dr. Fox for performance year 2024, reported as part of a group. Dr. Fox accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Fox's MIPS scores, performance year 2024
- 88of 100Final score
- 40of 100Improvement Activities
- 70of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Mark R. Fox received $4,512 in industry payments from 2016 to 2025
CMS Open Payments shows 150 general payments to Dr. Fox from 32 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Novo Nordisk Inc paid the most, $588.
General payments to Dr. Fox by program year, 2016 to 2025
General payments to Dr. Fox by kind, 2016 to 2025
- Food and beverage$4,511100%
- Travel and lodging$00%
Companies that paid Dr. Fox the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Mark R. Fox graduated from Michigan State University College of Human Medicine
Dr. Fox graduated from Michigan State University College of Human Medicine in 1993.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Mark R. Fox'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation 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)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| 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. Mark R. Fox
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. Mark R. Fox's NPI number?
Dr. Mark R. Fox's NPI number is 1831147560. It was assigned on May 5, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Mark R. Fox?
Dr. Mark R. Fox is an internist in Sandusky, Ohio. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Mark R. Fox practice?
Dr. Fox practices at 2500 W Strub Rd, Sandusky, OH 44870. Dr. Fox's primary practice is Northern Ohio Medical Specialists in Sandusky, Ohio. Dmand AI also links Dr. Fox to 1 hospital, 2 group practices and clinics, 2 home health agencies and 2 medical groups.
What is Dr. Mark R. Fox's office phone number?
The practice phone on file for Dr. Fox is (419) 609-1112.
What is Dr. Mark R. Fox's medical license number?
Dr. Fox holds Ohio license 35.071711.
Which hospitals is Dr. Mark R. Fox affiliated with?
Dr. Fox is affiliated with Blanchard Valley Hospital. Dmand AI links Dr. Fox to 1 more hospital.
What medical group is Dr. Mark R. Fox part of?
Dr. Fox is linked to NOMS Healthcare. Dmand AI links Dr. Fox to 2 more medical groups.
Does Dr. Mark R. Fox accept Medicare?
Yes. CMS data shows Dr. Fox billed Medicare for 14,567 services in 2024, and Dr. Fox accepts Medicare assignment.
What is Dr. Mark R. Fox's MIPS score?
Dr. Fox's MIPS final score for performance year 2024 is 88 out of 100, reported as part of a group.
How many Medicare patients does Dr. Mark R. Fox see?
CMS counts 671 Medicare patients who saw Dr. Fox in 2024, with an average age of 75.
Show 5 more questionsShow fewer questions
What services does Dr. Mark R. Fox bill to Medicare?
In 2024, Dr. Fox's most billed Medicare services were injected or infused drug (J1010), injected or infused drug (J3301) and office visit, established patient (99214).
Where did Dr. Mark R. Fox go to medical school?
Dr. Fox graduated from Michigan State University College of Human Medicine in 1993.
What drugs does Dr. Mark R. Fox prescribe most?
In 2024 Medicare Part D data, Dr. Fox's most prescribed drugs by claims were Atorvastatin Calcium, Lisinopril and Omeprazole.
Has Dr. Mark R. Fox received payments from drug or device companies?
CMS Open Payments shows $4,512 in general payments to Dr. Fox from 32 companies from 2016 to 2025. The largest total came from Novo Nordisk Inc.
How long has Dr. Mark R. Fox been practicing?
Dr. Fox graduated from medical school in 1993, 33 years ago.
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