Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. William John Bulsiewicz Jr., MD, MSCI

Gastroenterology Physician in Mount Pleasant, SC · enumerated 2008.

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

National Provider Identifier

1821247693

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Registry record

Entity type Individual (Type 1)

Name Dr. William John Bulsiewicz Jr.

Credential MD, MSCI

Sex Male

Practice address 1300 Hospital Dr, Suite 300, Mount Pleasant, SC, 29464

Phone (843) 884-5200

Enumeration date Sep 16, 2008

Last updated in NPPES Feb 23, 2017

Taxonomy & licenses

207RG0100X Gastroenterology Physician Allopathic & Osteopathic Physicians · License 72194 (GA) Secondary

207RG0100X Gastroenterology Physician Allopathic & Osteopathic Physicians · License 38981 (SC) 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
202I104133	Other	-	PTAN

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

Where does William Bulsiewicz practice?

The practice location on file with NPPES is in Mount Pleasant, SC. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for William Bulsiewicz?

The National Provider Identifier (NPI) for William Bulsiewicz is 1821247693, a Type 1 (individual) record in the CMS NPPES registry.

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James Craigie Plastic Surgery Physician · Mount Pleasant, SC NPI 1144225228 Joshua Watson Internal Medicine Physician · Mount Pleasant, SC NPI 1831171461 Loren Frankel Obstetrics & Gynecology Physician · Mount Pleasant, SC NPI 1588622690 David Smith Gynecology Physician · Mt Pleasant, SC NPI 1609834068 Lowcountry Obstetrics and Gynecology Obstetrics & Gynecology Physician · Mount Pleasant, SC NPI 1396763264 Southeastern Ocularists, Inc. Customized Equipment (DME) · Mt Pleasant, SC NPI 1841213196 Lowcountry Gastroenterology Gastroenterology Physician · Mount Pleasant, SC NPI 1154437291 David Ingraham Gastroenterology Physician · Mt Pleasant, SC NPI 1093810970

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-02-23.