Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mrs. Mary Catherine Chalmers, MS
Audiologist in Warrenton, VA · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1265554208
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Registry record
Entity type Individual (Type 1)
Name Mrs. Mary Catherine Chalmers
Credential MS
Sex Female
Practice address 550 Hospital Drive, Warrenton, VA, 20186
Phone (540) 347-0505
Fax (540) 347-5224
Enumeration date Apr 3, 2007
Last updated in NPPES Jul 8, 2007
Taxonomy & licenses
231H00000X Audiologist Speech, Language and Hearing Service Providers · License 2201001174 (VA) Primary
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
How do I verify Mary Chalmers's NPI record?
Cross-check NPI 1265554208 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1265554208 active?
Yes, as of the latest NPPES snapshot, NPI 1265554208 is active (record last updated 2007-07-08).
Other providers at this practice address
Browse all → David Phillips Otolaryngology Physician · Warrenton, VA NPI 1700846078 Christopher Chang Otolaryngology Physician · Warrenton, VA NPI 1649234824 Fauquier Ear Nose and Throat Consultants, Plc Otolaryngology Physician · Warrenton, VA NPI 1851472328 Samuel J. Lloyd MD PC Gynecology Physician · Warrenton, VA NPI 1063783256
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.