Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Mary Ann Marie Hollis, DDS
Dentist in Lombard, IL · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1578631180
See something wrong? Report a correction
Registry record
Entity type Individual (Type 1)
Name Dr. Mary Ann Marie Hollis
Credential DDS
Sex Female
Practice address 2 E 22nd Street, Suite 201, Lombard, IL, 60148
Phone (630) 627-4680
Fax (630) 627-4690
Enumeration date Dec 1, 2006
Last updated in NPPES Jul 8, 2007
Taxonomy & licenses
DDS · Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees.
About the DDS 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
What is the NPI number for Mary Ann Hollis?
The National Provider Identifier (NPI) for Mary Ann Hollis is 1578631180, a Type 1 (individual) record in the CMS NPPES registry.
Where does Mary Ann Hollis practice?
The practice location on file with NPPES is in Lombard, IL. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.