Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Ms. Caitlin Hosmer Kirby, MS, RD
Registered Dietitian in Boston, MA · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1134142375
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Registry record
Entity type Individual (Type 1)
Name Ms. Caitlin Hosmer Kirby
Credential MS, RD
Sex Female
Practice address 75 Francis St, Boston, MA, 02115
Phone (617) 732-6054
Fax (617) 732-7024
Enumeration date Jul 26, 2006
Last updated in NPPES Jul 8, 2007
Taxonomy & licenses
RD · Registered Dietitian: A nutrition professional credentialed by the Commission on Dietetic Registration.
About the RD 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 Caitlin Kirby 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 Caitlin Kirby?
The National Provider Identifier (NPI) for Caitlin Kirby is 1134142375, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.