Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Mrs. Marcia Ruth O'Connor, B.S.,R.PH.

Pharmacist in Stamford, NY · enumerated 2010.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1053634501

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Registry record

Entity type Individual (Type 1)

Name Mrs. Marcia Ruth O'Connor

Credential B.S.,R.PH.

Sex Female

Practice address Stamford, NY, 12167

Phone (607) 434-5087

Enumeration date Mar 11, 2010

Last updated in NPPES Mar 11, 2010

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

183500000X Pharmacist Pharmacy Service Providers · License 029396 (NY) Primary

RPH · Registered Pharmacist: A licensed pharmacist registered with a state board of pharmacy. About the RPH credential

Other identifiers

Identifier	Type	State	Issuer
029396	Other	NY	LICENSE

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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Marcia O'Connor practice?

The practice location on file with NPPES is in Stamford, NY. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Marcia O'Connor?

The National Provider Identifier (NPI) for Marcia O'Connor is 1053634501, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-03-11.