Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mrs. Rosemary S Marcus, MS, OTR/L
Specialist in Clinton, NY · enumerated 2011.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1003183666
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Registry record
Entity type Individual (Type 1)
Name Mrs. Rosemary S Marcus
Credential MS, OTR/L
Sex Female
Practice address 102 College St, Clinton, NY, 13323
Phone (315) 853-3482
Enumeration date Nov 28, 2011
Last updated in NPPES Nov 28, 2011
Taxonomy & licenses
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 003388-1 | Other | NY | NEW YORK STATE LICENSE TO PRACTICE OCCUPATIONAL THERAPY |
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 Rosemary Marcus?
The National Provider Identifier (NPI) for Rosemary Marcus is 1003183666, a Type 1 (individual) record in the CMS NPPES registry.
Where does Rosemary Marcus practice?
The practice location on file with NPPES is in Clinton, NY. Providers can have multiple locations; NPPES lists the primary practice address.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-11-28.