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

Mark Leo Johnson, MD

Individual provider Surgery Physician · NPI 1649353855

Mark Leo Johnson, MD practises General Surgery in Morgantown, West Virginia. Graduated from University of Minnesota Medical School in 1992, 34 years ago. Practices with Monongalia County General Hospital Company, a 245-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in West Virginia.

Years since qualifying
34
Trained at
University of Minnesota Medical School
Licensed in
WV
In the registry since
2006
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

3000 Mon Health Medical Park Dr Ste 3300
Morgantown, WV 26505-1169
Phone: (304) 599-1448
Fax: (304) 599-5335
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 150 Memorial Dr # A, Kingwood, WV 26537-1141 — (304) 329-1400

Specialties & licences

Surgery Physician (primary) Taxonomy 208600000X · Licence 18363 (WV)

Record details

NPI number1649353855
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 23, 2006
Last updated in NPPESApril 1, 2024
Certification dateApril 1, 2024

Medicare enrollment

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

Medicare specialtyGENERAL SURGERY
Also practisesPERIPHERAL VASCULAR DISEASE
Medical schoolUNIVERSITY OF MINNESOTA MEDICAL SCHOOL
Graduated 1992 (34 years in practice)
Group practice Monongalia County General Hospital Company — 245 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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 58 times · 67th percentile
Upper gastrointestinal (GI) endoscopy for acid reflux 46 times · 62nd percentile
Hernia repair (minimally invasive) 1–10 times
Hernia repair - groin (open) 1–10 times
Mastectomy 1–10 times
Melanoma (skin cancer) excision 1–10 times
Removal of the uterus 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 patients293
Services billed 806 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

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.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $67 1 payment · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

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

  • Preston Memorial Hospital Hospital · Kingwood, WV · listed as Preston Memorial Hospital Corporation
  • Mon Health Medical Center Hospital · Morgantown, WV

Colleagues at Monongalia County General Hospital Company

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 245 clinicians in the practice; 12 are shown here.

Other providers in Morgantown