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

Madelyn B Hernandez

Individual provider Surgery Physician · NPI 1740784255

Madelyn B Hernandez practises General Surgery in Marietta, Ohio. Graduated from George Washington University School of Medicine in 2018, 8 years ago. Practices with Marietta Memorial Hospital, a 386-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Ohio.

Years since qualifying
8
Trained at
George Washington University School of Medicine
Licensed in
OH
In the registry since
2018
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Practice location Address checks out

400 Matthew St Ste B-1
Marietta, OH 45750-1644
Phone: (740) 376-5501
Show map & directions

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

Additional practice locations (1)

  • 1818 Washington Blvd Ste G, Belpre, OH 45714-2080 — (740) 568-5384

Specialties & licences

Surgery Physician (primary) Taxonomy 208600000X · Licence 35.147557 (OH)

Record details

NPI number1740784255
Entity typeIndividual (Type 1)
GenderFemale
Sole proprietorYes
NPI enumeratedMarch 20, 2018
Last updated in NPPESFebruary 12, 2025
Certification dateFebruary 12, 2025

Medicare enrollment

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

Medicare specialtyGENERAL SURGERY
Medical schoolGEORGE WASHINGTON UNIVERSITY SCHOOL OF MEDICINE
Graduated 2018 (8 years in practice)
Group practice Marietta Memorial Hospital — 386 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.

Melanoma (skin cancer) excision 21 times · 75th percentile
Mastectomy 15 times · 72nd percentile
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 patients26
Services billed 83 a service is one billed item, such as a visit, a test or a procedure
Average patient age73

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 $295 13 payments · 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.

Colleagues at Marietta Memorial Hospital

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 386 clinicians in the practice; 12 are shown here.

Other providers in Marietta