Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Marsha Ann Mason, M.D.
Specialist in Manassas, VA · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1831205129
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Registry record
Entity type Individual (Type 1)
Name Dr. Marsha Ann Mason
Credential M.D.
Sex Female
Practice address 9384 Forestwood Ln, Manassas, VA, 20110
Phone (703) 369-2999
Enumeration date Aug 21, 2006
Last updated in NPPES Jul 8, 2007
Taxonomy & licenses
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.
Frequently asked questions
Where does Marsha Mason practice?
The practice location on file with NPPES is in Manassas, VA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Marsha Mason?
The National Provider Identifier (NPI) for Marsha Mason is 1831205129, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.