Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Katherine Susan Killinger, FNP-C
Nurse Practitioner in Boston, MA · enumerated 2009.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1154655447
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Registry record
Entity type Individual (Type 1)
Name Katherine Susan Killinger
Credential FNP-C
Sex Female
Practice address 100 Cambridge St, Boston, MA, 02114
Phone (617) 726-7714
Enumeration date Sep 20, 2009
Last updated in NPPES May 5, 2023
Taxonomy & licenses
363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License RN265065 (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
Where does Katherine Killinger practice?
The practice location on file with NPPES is in Boston, MA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Katherine Killinger?
The National Provider Identifier (NPI) for Katherine Killinger is 1154655447, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
Browse all → Elizabeth Klerman General Practice Physician · Boston, MA NPI 1487621777 Oluwatoyin Oladosu Family Nurse Practitioner · Boston, MA NPI 1063719961 Rebecca Pare Women's Health Nurse Practitioner · Boston, MA NPI 1811270549 Shauna Dawson Counselor · Boston, MA NPI 1538424809 Meghan Duffany Women's Health Nurse Practitioner · Boston, MA NPI 1679905921 Kathleen Sharrott Advanced Practice Midwife · Boston, MA NPI 1578965711 Kathryn Difiore Acute Care Nurse Practitioner · Boston, MA NPI 1700308848 Emily Starr Clinical Social Worker · Boston, MA NPI 1831688688
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-05-05.