Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Catherine Hsu, R.D.
Registered Dietitian in Boston, MA · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1265643464
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Registry record
Entity type Individual (Type 1)
Name Catherine Hsu
Credential R.D.
Sex Female
Practice address 750 Washington St, Boston, MA, 02111
Phone (617) 636-5273
Enumeration date May 27, 2007
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
What specialty is Catherine Hsu?
Catherine Hsu is registered in NPPES with the primary taxonomy of Registered Dietitian. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.