Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Rosemarie T Greyson-Fleg, MD

Diagnostic Radiology Physician in Laurel, MD · enumerated 2007.

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

National Provider Identifier

1538355789

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Registry record

Entity type Individual (Type 1)

Name Rosemarie T Greyson-Fleg

Credential MD

Sex Female

Practice address 9811 Mallard Dr Ste 102, Laurel, MD, 20708

Phone (301) 776-4777

Enumeration date Sep 21, 2007

Last updated in NPPES Sep 21, 2007

Taxonomy & licenses

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License D0029761 (MD) Primary

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

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

Where does Rosemarie Greyson-Fleg practice?

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

What is the NPI number for Rosemarie Greyson-Fleg?

The National Provider Identifier (NPI) for Rosemarie Greyson-Fleg is 1538355789, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-09-21.