1. Home
  2. Directory
  3. Ohio
  4. Columbus
  5. Internal Medicine
  6. NPI Profile

OHIO GASTROENTEROLOGY GROUP, INC.
NPI 1124197637
Internal Medicine - Gastroenterology in Columbus, OH

Active since November 07, 2006CLIA Certified · 8 labs
3400 OLENTANGY RIVER RD, COLUMBUS, OH 43202(614) 754-5500(614) 457-9519 Get Directions Write a Review

NPPES record last updated: August 13, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Aug 13, 2025, Jan 7, 2025, Oct 25, 2023 and 3 more (6 updates tracked since 2018).

About Ohio Gastroenterology Group, Inc. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

OHIO GASTROENTEROLOGY GROUP, INC. (NPI 1124197637) is a healthcare organization registered as a gastroenterology in Columbus, Ohio and active in the NPI registry since November 2006. The organization holds 8 active CLIA laboratory certificates, maintains 7 additional practice locations, and lists John R Scherer, Lab Director, as its authorized official.

NPPES Registry Identity

NPI1124197637
Entity TypeOrganization
Primary Taxonomy207RG0100X
Legal Business NameOHIO GASTROENTEROLOGY GROUP, INC.
Location Address3400 OLENTANGY RIVER RDColumbus, OH 43202
Mailing Address3400 Olentangy River RdColumbus, OH 43202-1523 · (614) 754-5500 · Fax (614) 457-9519
Phone(614) 754-5500
Fax(614) 457-9519
Organization SubpartNo
Authorized OfficialJohn R SchererLab Director · (614) 754-5500
Enumeration DateNovember 7, 2006
Last NPPES UpdateAugust 13, 20256 updates tracked since enumeration
NPPES CertifiedAugust 13, 2025
✔ NPI 1124197637 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians
Taxonomy Code207RG0100X
Definition
An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.
3400 OLENTANGY RIVER RD, Columbus, OH 43202
Open in Google Maps ↗

Secondary Practice Locations 7

Location 185 McNaughten Rd Ste 320Columbus, OH 43213-5111 · Phone (614) 754-5500 · Fax (614) 457-9519
Location 21025 Refugee Rd Ste 100APickerington, OH 43147-9861 · Phone (614) 754-5500 · Fax (614) 457-9519
Location 33000 Meadow Pond CtGrove City, OH 43123-9827 · Phone (614) 754-5500 · Fax (614) 754-5501
Location 4430 Altair Pkwy Ste 110Westerville, OH 43082-7647 · Phone (614) 754-5500 · Fax (614) 457-9519
Location 5722 Buckles Ct N Ste 100Gahanna, OH 43230-6923 · Phone (614) 754-5500 · Fax (614) 754-5501
Location 66670 Perimeter Dr Ste 200Dublin, OH 43016-8065 · Phone (614) 754-5500 · Fax (614) 457-9519
Location 7931 Chatham LnColumbus, OH 43221-2417 · Phone (614) 754-5500

Other Identifiers 1

Medicaid0206235OH

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Ohio Gastroenterology Group, Inc. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

116

Medicare enrollment records show 116 clinicians reassign Medicare billing to Ohio Gastroenterology Group, Inc., which bills Medicare for the services they deliver. Of these, 70 practice at this address and 98 within 10 miles. Listed here are the 20 practicing nearest to this location.

Clinicians by Medicare Specialty 5

Gastroenterology54
Nurse Practitioner30
Certified Registered Nurse Anesthetist (CRNA)26
Pathology5
Anesthesiology1

Nearest to this location (20)

See all 116
Jan Batson, CRNA
Certified Registered Nurse Anesthetist (CRNA)
NPI 1285871194
3400 OLENTANGY RIVER RD
Columbus, OH 43202
(614) 754-5500
✔ Accepts MedicareSame address
Ruchi Bhatia, MD
Gastroenterology
NPI 1003194093
3400 OLENTANGY RIVER RD
Columbus, OH 43202
(614) 754-5500
✔ PECOS✔ Accepts MedicareSame address
Kiran Bidari, M.D.
Gastroenterology
NPI 1083847826
3400 OLENTANGY RIVER RD
Columbus, OH 43202
(614) 754-5500
✔ PECOS✔ Accepts MedicareSame address
Prachi Biyani, MD
Gastroenterology
NPI 1508185398
3400 OLENTANGY RIVER RD
Columbus, OH 43202
(614) 754-5500
✔ PECOS✔ Accepts MedicareSame address
Gretchen Calhoun, CNP
Nurse Practitioner
NPI 1689714586
3400 OLENTANGY RIVER RD
Columbus, OH 43202
(614) 754-5500
✔ PECOS✔ Accepts MedicareSame address
John Castor, MD
Gastroenterology
NPI 1093987257
3400 OLENTANGY RIVER RD
Columbus, OH 43202
(614) 754-5500
✔ PECOS✔ Accepts MedicareSame address
Patrick Chen, D.O.
Gastroenterology
NPI 1265859243
3400 OLENTANGY RIVER RD
Columbus, OH 43202
(614) 754-5500
✔ PECOS✔ Accepts MedicareSame address
Samantha Davis, CRNA
Certified Registered Nurse Anesthetist (CRNA)
NPI 1316436025
3400 OLENTANGY RIVER RD
Columbus, OH 43202
(614) 754-5500
✔ Accepts MedicareSame address
Kori Devoll, RN, CNP
Nurse Practitioner
NPI 1417397704
3400 OLENTANGY RIVER RD
Columbus, OH 43202
(614) 754-5500
✔ PECOS✔ Accepts MedicareSame address
Brendan Divis
Anesthesiology
NPI 1104206564
3400 OLENTANGY RIVER RD
Columbus, OH 43202
(614) 754-5500
✔ PECOS✔ Accepts MedicareSame address
Sara Doran, CNP
Nurse Practitioner
NPI 1043705387
3400 OLENTANGY RIVER RD
Columbus, OH 43202
(614) 754-5500
✔ PECOS✔ Accepts MedicareSame address
Mara Fernandez Santiago, MD
Pathology
NPI 1235493867
3400 OLENTANGY RIVER RD
Columbus, OH 43202
(414) 805-3666
✔ PECOS✔ Accepts MedicareSame address
Kellen Fessler, CNP
Nurse Practitioner
NPI 1093466252
3400 OLENTANGY RIVER RD
Columbus, OH 43202
(614) 754-5500
✔ PECOS✔ Accepts MedicareSame address
Kathy Foreman, CNP
Nurse Practitioner
NPI 1922268150
3400 OLENTANGY RIVER RD
Columbus, OH 43202
(614) 754-5500
✔ PECOS✔ Accepts MedicareSame address
Timothy Grannell, CRNA
Certified Registered Nurse Anesthetist (CRNA)
NPI 1245482470
3400 OLENTANGY RIVER RD
Columbus, OH 43202
(614) 754-5500
✔ Accepts MedicareSame address
Megan Gropp, APRN.CRNA
Certified Registered Nurse Anesthetist (CRNA)
NPI 1457621963
3400 OLENTANGY RIVER RD
Columbus, OH 43202
(614) 754-5500
✔ Accepts MedicareSame address
Eric Himmelfarb, MD
Pathology
NPI 1093862989
3400 OLENTANGY RIVER RD
Columbus, OH 43202
(614) 754-5500
✔ PECOS✔ Accepts MedicareSame address
Chris Humston, CRNA
Certified Registered Nurse Anesthetist (CRNA)
NPI 1538463344
3400 OLENTANGY RIVER RD
Columbus, OH 43202
(614) 754-5000
Same address
Megan Lockyer, D.O.
Pathology
NPI 1154619187
3400 OLENTANGY RIVER RD
Columbus, OH 43202
(614) 754-5500
✔ PECOS✔ Accepts MedicareSame address
Julianne Purdy, M.D.
Pathology
NPI 1083831689
3400 OLENTANGY RIVER RD
Columbus, OH 43202
(614) 754-5500
✔ PECOS✔ Accepts MedicareSame address
See all 116 clinicians

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

CLIA Laboratory Certificates CMS CLIA 8

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Waiver 36D2154908

Ohio Gastroenterology Group, Inc · Pickerington, OH
Active · expires Sep 19, 2028
CLIA Number36D2154908
Laboratory TypePhysician Office
Certificate Effective DateSeptember 20, 2026
Certificate Expiration DateSeptember 19, 2028
Laboratory DirectorBrian M. Isler
Laboratory Phone(614) 754-5500
Laboratory LocationOhio Gastroenterology Group, Inc1025 Refugee Road, Suite 100A, Pickerington, OH 43147
CLIA data matches this NPI record on: Address Name Phone
This certificate is issued to a laboratory to perform only waived tests.

Certificate of Waiver 36D1082067

Ohio Gastroenterology Group, Inc · Dublin, OH
Active · expires Mar 31, 2028
CLIA Number36D1082067
Laboratory TypePhysician Office
Certificate Effective DateApril 1, 2026
Certificate Expiration DateMarch 31, 2028
Laboratory DirectorMarty M. Meyer
Laboratory Phone(614) 754-5500
Laboratory LocationOhio Gastroenterology Group, Inc6670 Perimeter Drive, Suite 200, Dublin, OH 43016
CLIA data matches this NPI record on: Address Name Phone
This certificate is issued to a laboratory to perform only waived tests.

Certificate of Waiver 36D2329290

Ohio Gastroenterology Group, Inc · Columbus, OH
Active · expires Aug 25, 2027
CLIA Number36D2329290
Laboratory TypeInfusion Center
Certificate Effective DateAugust 26, 2025
Certificate Expiration DateAugust 25, 2027
Laboratory DirectorShail M. Govani
Laboratory Phone(614) 754-5500
Laboratory LocationOhio Gastroenterology Group, Inc931 Chatham Lane, Columbus, OH 43221
CLIA data matches this NPI record on: Address Name Phone
This certificate is issued to a laboratory to perform only waived tests.

Certificate of Waiver 36D2317335

Ohio Gastroenterology Group, Inc · Gahanna, OH
Active · expires Jan 21, 2027
CLIA Number36D2317335
Laboratory TypePhysician Office
Certificate Effective DateJanuary 22, 2025
Certificate Expiration DateJanuary 21, 2027
Laboratory DirectorDavid Y. Lo
Laboratory Phone(614) 754-5500
Laboratory LocationOhio Gastroenterology Group, Inc722 Buckles Court North, Suite 100, Gahanna, OH 43230
CLIA data matches this NPI record on: Address Name Phone
This certificate is issued to a laboratory to perform only waived tests.

Certificate of Waiver 36D0918036

Ohio Gastroenterology Group, Inc · Columbus, OH
Active · expires Jul 30, 2028
CLIA Number36D0918036
Laboratory TypePhysician Office
Certificate Effective DateJuly 31, 2026
Certificate Expiration DateJuly 30, 2028
Laboratory DirectorJohn R. Scherer
Laboratory Phone(614) 754-5545
Laboratory LocationOhio Gastroenterology Group, Inc3400 Olentangy River Road, Columbus, OH 43202
CLIA data matches this NPI record on: Address Name
This certificate is issued to a laboratory to perform only waived tests.

Certificate of Waiver 36D2168168

Ohio Gastroenterology Group, Inc · Westerville, OH
Active · expires Jun 23, 2027
CLIA Number36D2168168
Laboratory TypePhysician Office
Certificate Effective DateJune 24, 2025
Certificate Expiration DateJune 23, 2027
Laboratory DirectorJohn M. Castor
Laboratory Phone(614) 754-5545
Laboratory LocationOhio Gastroenterology Group, Inc430 Altair Parkway Suite 110, Westerville, OH 43082
CLIA data matches this NPI record on: Address Name
This certificate is issued to a laboratory to perform only waived tests.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Ohio Gastroenterology Group, Inc.'s NPI number?

The NPI number for Ohio Gastroenterology Group, Inc. is 1124197637. It was assigned to this organization in the NPPES registry on November 7, 2006.

Where is Ohio Gastroenterology Group, Inc. located?

Ohio Gastroenterology Group, Inc. is located at 3400 Olentangy River Rd, Columbus, OH 43202. The listed phone number is (614) 754-5500.

What is Ohio Gastroenterology Group, Inc.'s specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Is Ohio Gastroenterology Group, Inc. enrolled in Medicare?

Yes. Ohio Gastroenterology Group, Inc. is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Ohio Gastroenterology Group, Inc.?

According to the CMS Revalidation Reassignment List (October 2026 release), 116 clinicians in 5 Medicare specialties reassign their Medicare billing to Ohio Gastroenterology Group, Inc.. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. The largest specialties are Gastroenterology (54), Nurse Practitioner (30) and Certified Registered Nurse Anesthetist (CRNA) (26). Of these, 70 practice at this address and 98 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Does Ohio Gastroenterology Group, Inc. hold CLIA laboratory certificates?

Yes. 8 active CLIA laboratory certificates are associated with this NPI under the federal Clinical Laboratory Improvement Amendments program. The certificates are listed in the CLIA Laboratory Certificates section above.

What insurance does Ohio Gastroenterology Group, Inc. accept?

Health plans from Anthem Blue Cross and Blue Shield list Ohio Gastroenterology Group, Inc. as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Ohio Gastroenterology Group, Inc. was last updated on August 13, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.