Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Marc Thoma, MD

Surgery Physician in Lancaster, OH · enumerated 2018 · practices at Fairfield Internal Medicine, Inc.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1346747961

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Registry record

Entity type Individual (Type 1)

Name Marc Thoma

Credential MD

Sex Male

Practice address 135 N Ewing St Ste 305, Lancaster, OH, 43130

Phone (740) 687-5437

Fax (740) 687-6330

Enumeration date Apr 10, 2018

Last updated in NPPES Jun 12, 2024

Taxonomy & licenses

390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Secondary

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License 35.139177 (OH) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1346747961 active?

Yes, as of the latest NPPES snapshot, NPI 1346747961 is active (record last updated 2024-06-12).

How do I verify Marc Thoma's NPI record?

Cross-check NPI 1346747961 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

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Fairfield Internal Medicine, Inc Internal Medicine Physician · Lancaster, OH NPI 1801992706

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-06-12.