Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Medstar Medical Group - Southern Maryland LLC

Internal Medicine Physician in Prince Frederick, MD · enumerated 2025 · authorized official Alan Buster, C.O.O..

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

National Provider Identifier

1477350403

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Registry record

Entity type Organization (Type 2)

Legal business name Medstar Medical Group - Southern Maryland LLC

Other name <Unavail>

Practice address 130 Hospital Rd Ste 300, Prince Frederick, MD, 20678

Phone (410) 535-4333

Fax (410) 535-0495

Enumeration date Feb 27, 2025

Last updated in NPPES Dec 15, 2025

Taxonomy & classification

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians Secondary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians Primary

207RC0000X Cardiovascular Disease Physician Allopathic & Osteopathic Physicians Secondary

207RG0100X Gastroenterology Physician Allopathic & Osteopathic Physicians Secondary

207RN0300X Nephrology Physician Allopathic & Osteopathic Physicians Secondary

207RP1001X Pulmonary Disease Physician Allopathic & Osteopathic Physicians Secondary

Authorized official

Name Alan Buster

Title C.O.O.

Phone (301) 373-7905

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 type of organization is Medstar Medical Group - Southern Maryland LLC?

Medstar Medical Group - Southern Maryland LLC is registered in NPPES as a Internal Medicine Physician (its primary provider taxonomy).

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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-12-15.