Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Medstar Medical Group - Southern Maryland LLC

Hematology & Oncology Physician in California, MD · enumerated 2025 · authorized official Alan Buster, Credentialing.

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

National Provider Identifier

1780481739

Verified

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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 23415 Three Notch Rd 2051, California, MD, 20619

Phone (301) 737-7800

Fax (301) 373-6800

Enumeration date Feb 27, 2025

Last updated in NPPES Aug 1, 2025

Taxonomy & classification

207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name Alan Buster

Title Credentialing

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 Hematology & Oncology 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.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-08-01.