NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Doreen Hamilton, N.P.

Acute Care Nurse Practitioner in Downey, CA · enumerated 2010.

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

National Provider Identifier

1629388798

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Ms. Doreen Hamilton
Credential N.P.
Sex Female
Practice address 10000 Lakewood Blvd, Downey, CA, 90240
Phone (562) 862-3684
Fax (562) 862-7145
Enumeration date Oct 7, 2010
Last updated in NPPES Oct 7, 2010

Taxonomy & licenses

363LA2100X Acute Care Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 20317 (CA) Primary
NP · Nurse Practitioner: An advanced practice registered nurse with graduate training, licensed to diagnose and treat, often with prescriptive authority. About the NP 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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Doreen Hamilton?
The National Provider Identifier (NPI) for Doreen Hamilton is 1629388798, a Type 1 (individual) record in the CMS NPPES registry.
Where does Doreen Hamilton practice?
The practice location on file with NPPES is in Downey, 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 2010-10-07.