Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mary K Decesare-Flaherty, NP.C
Nurse Practitioner in Worcester, MA · enumerated 2011.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1629357900
See something wrong? Report a correction
Registry record
Entity type Individual (Type 1)
Name Mary K Decesare-Flaherty
Credential NP.C
Sex Female
Practice address 25 Oak Ave, Worcester, MA, 01605
Phone (507) 756-6293
Fax (508) 756-9404
Enumeration date Aug 4, 2011
Last updated in NPPES Aug 4, 2011
Taxonomy & licenses
363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License RN2262890 (MA) 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
What is the NPI number for Mary Decesare-Flaherty?
The National Provider Identifier (NPI) for Mary Decesare-Flaherty is 1629357900, a Type 1 (individual) record in the CMS NPPES registry.
Where does Mary Decesare-Flaherty practice?
The practice location on file with NPPES is in Worcester, MA. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
Browse all → Charles Birbara Specialist · Worcester, MA NPI 1093705410 Richard Eisenberg Ophthalmology Physician · Worcester, MA NPI 1093765455 Worcester Ophthalmology Associates, Inc Ophthalmology Physician · Worcester, MA NPI 1992755359 Stuart Weisman Ophthalmology Physician · Worcester, MA NPI 1922023787 Charles A. Birbara, M.D. Rheumatology Physician · Worcester, MA NPI 1659422699 Charles Roberts Ophthalmology Physician · Worcester, MA NPI 1881884914 Teri Kleinberg Ophthalmology Physician · Worcester, MA NPI 1609187046 Worcester Ophthalmology Associates, Inc Ophthalmology Physician · Worcester, MA NPI 1417660010
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-08-04.