Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

John Mergo, DO

Individual provider Anesthesiology Physician · NPI 1952301749

John Mergo, DO is an Anesthesiology in Chillicothe, Ohio. Graduated from Midwestern University, Chicago College of Osteopathic Med in 1989, 37 years ago. Practices with Adena Medical Group LLC, a 377-clinician group and accepts Medicare assignment. Licensed in Ohio.

Years since qualifying
37
Trained at
Midwestern University, Chicago College of Osteopathic Med
Licensed in
OH
In the registry since
2005
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

272 Hospital Rd
Chillicothe, OH 45601-9031
Phone: (513) 672-3309
Fax: (513) 672-3323
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Anesthesiology Physician (primary) Taxonomy 207L00000X · Licence 34005802 (OH)

Record details

NPI number1952301749
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedJuly 22, 2005
Last updated in NPPESApril 6, 2021
Certification dateApril 6, 2021
Mailing address11490 Springfield Pike, Cincinnati, OH 45246-3524

Medicare enrollment

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

Medicare specialtyANESTHESIOLOGY
Medical schoolMIDWESTERN UNIVERSITY, CHICAGO COLLEGE OF OSTEOPATHIC MED
Graduated 1989 (37 years in practice)
Group practice Adena Medical Group Llc — 377 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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