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

Dr. Billy Back, MD

Individual provider Internal Medicine Physician · NPI 1831191444

Dr. Billy Back, MD practises Internal Medicine in Greenwich, Ohio. Graduated from Medical College of Ohio in 1999, 27 years ago. Practices with Mercy Health Physicians-North LLC, a 132-clinician group and accepts Medicare assignment. Licensed in Ohio.

Years since qualifying
27
Trained at
Medical College of Ohio
Licensed in
OH
In the registry since
2005
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

65 W Main St
Greenwich, OH 44837-1030 Not confirmed with CMS for 10 years — call before visiting
Phone: (419) 752-1811
Fax: (419) 752-2145
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

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

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 35078984 (OH)

Record details

NPI number1831191444
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 12, 2005
Last updated in NPPESSeptember 1, 2016

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolMEDICAL COLLEGE OF OHIO
Graduated 1999 (27 years in practice)
Group practice Mercy Health Physicians-North Llc — 132 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations5 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 1–10 times
Removal of skin lesions 1–10 times
Removal or shaving of skin growth 1–10 times
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 patients734
Services billed 2,667 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.

Practises at

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

Also affiliated with 1 nursing home, which CMS identifies by certification number only.

Colleagues at Mercy Health Physicians-North LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 132 clinicians in the practice; 12 are shown here.