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

John M Koval, MD

Individual provider Internal Medicine Physician · NPI 1992773451

John M Koval, MD practises Internal Medicine in Youngstown, Ohio. Graduated from Medical College of Ohio in 1980, 46 years ago. Practices with Triad Health Services LLC, a 253-clinician group and accepts Medicare assignment. Licensed in Ohio.

Years since qualifying
46
Trained at
Medical College of Ohio
Licensed in
OH
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

7641 Market St Ste 2
Youngstown, OH 44512-5980 Not confirmed with CMS for 11 years — call before visiting
Phone: (330) 884-2444
Fax: (330) 965-4836
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 35048160 (OH)

Record details

NPI number1992773451
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMarch 10, 2006
Last updated in NPPESApril 13, 2015

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolMEDICAL COLLEGE OF OHIO
Graduated 1980 (46 years in practice)
Group practice Triad Health Services Llc — 253 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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 patients366
Services billed 1,781 a service is one billed item, such as a visit, a test or a procedure
Average patient age76

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.

  • Expand Health Skilled At Home Llc Home health agency · Youngstown, OH
  • Patriot Homecare, Inc Home health agency · Girard, OH
  • Southwoods Health At Home Llc Home health agency · Youngstown, OH · listed as Southwoods Health at Home, LLC
  • Hmhp St Elizabeth Boardman Health Center Hospital · Boardman, OH
  • Mh St Elizabeth Youngstown Hospital Hospital · Youngstown, OH
  • Salem Regional Medical Center Hospital · Salem, OH
  • Surgical Hospital At Southwoods Hospital · Youngstown, OH

Colleagues at Triad Health Services LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 253 clinicians in the practice; 12 are shown here.

Other providers in Youngstown