Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Glennan Medical Group PC

Q: What type of organization is Glennan Medical Group PC?

Glennan Medical Group PC is registered in NPPES as a Internal Medicine Physician (its primary provider taxonomy).

Internal Medicine Physician in Oxford, MI · enumerated 2005 · authorized official Sheryl Wissman, Owner/Physician.

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

National Provider Identifier

1285632364

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Registry record

Entity type Organization (Type 2)

Legal business name Glennan Medical Group PC

Practice address 72 S Washington St, Suite 204, Oxford, MI, 48371

Phone (248) 628-2233

Fax (248) 628-2384

Enumeration date Jul 12, 2005

Last updated in NPPES Apr 22, 2020

Taxonomy & classification

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 4301051927 (MI) Primary

Authorized official

Name Sheryl Wissman

Title Owner/Physician

Phone (248) 628-2233

Other identifiers

Identifier	Type	State	Issuer
125218	Other	MI	PREFERRED CHOICES
7023567	Other	MI	AETNA
CF9338	Other	MI	RAILROAD MEDICARE
I17832	Other	MI	HAP
110F302700	Other	MI	BCBS
4266551	Other	MI	AETNA
E49479	Other	MI	HAP
1011749	Other	MI	HEALTH ADVANTAGE
4603282	Medicaid	MI	-
4406452	Medicaid	MI	-

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

What is a Type 2 NPI?

A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

What type of organization is Glennan Medical Group PC?

Glennan Medical Group PC is registered in NPPES as a Internal Medicine Physician (its primary provider taxonomy).

Providers at this address

Browse all →

Sheryl Wissman Internal Medicine Physician · Oxford, MI NPI 1386642056 Medicine Room Community/Retail Pharmacy · Oxford, MI NPI 1982700779 Lakeside Medical Group, PC Family Medicine Physician · Oxford, MI NPI 1386769180 Sarah Giroux Physical Therapist · Oxford, MI NPI 1285808535 Lawrence Oshier Clinical Psychologist · Oxford, MI NPI 1487828422 Essential Health Chiropractic,P.C. Chiropractor · Oxford, MI NPI 1801063201 Oxford Urgent Care P L C Specialist · Oxford, MI NPI 1700036936 Oxford Urgent Care, LLC Internal Medicine Physician · Oxford, MI NPI 1316265531

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-04-22.