Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Michael J. Grupka, MD

Gastroenterology Physician in Hiram, GA · enumerated 2007.

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

National Provider Identifier

1497953467

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Registry record

Entity type Individual (Type 1)

Name Michael J. Grupka

Credential MD

Sex Male

Practice address 148 Bill Carruth Pkwy Ste 200, Hiram, GA, 30141

Phone (678) 741-5000

Fax (770) 445-9013

Enumeration date Jul 10, 2007

Last updated in NPPES May 31, 2018

Taxonomy & licenses

207RG0100X Gastroenterology Physician Allopathic & Osteopathic Physicians · License 060588 (GA) Primary

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

Other identifiers

Identifier	Type	State	Issuer
483829670C	Medicaid	GA	-

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.

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Frequently asked questions

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Michael Grupka?

Michael Grupka is registered in NPPES with the primary taxonomy of Gastroenterology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

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Judy Oh Gastroenterology Physician · Hiram, GA NPI 1184840589

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-05-31.