Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Michelle Siobhan Roy, RD
Registered Dietitian in Oakland, CA · enumerated 2011.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1144507252
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Registry record
Entity type Individual (Type 1)
Name Michelle Siobhan Roy
Credential RD
Sex Female
Practice address 405 14th St, Suite 610, Oakland, CA, 94612
Phone (510) 922-8208
Fax (510) 550-7966
Enumeration date Nov 3, 2011
Last updated in NPPES Nov 3, 2011
Taxonomy & licenses
133V00000X Registered Dietitian Dietary & Nutritional Service Providers · License 1043809 (CA) Primary
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 is the NPI number for Michelle Roy?
The National Provider Identifier (NPI) for Michelle Roy is 1144507252, a Type 1 (individual) record in the CMS NPPES registry.
Where does Michelle Roy practice?
The practice location on file with NPPES is in Oakland, CA. 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 2011-11-03.