NPI Portal NPI Lookup & Verification

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

Dr. Rahel Teferi Ruiz

Internal Medicine Physician in Castro Valley, CA · enumerated 2005 · practices at Rahel Teferi Ruiz MD, Inc..

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

National Provider Identifier

1821089129

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Dr. Rahel Teferi Ruiz
Sex Female
Practice address Castro Valley, CA, 94552
Phone (510) 881-2192
Fax (510) 363-8642
Enumeration date Nov 4, 2005
Last updated in NPPES Dec 24, 2019

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

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License A64304 (CA) Primary

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 Rahel Ruiz practice?
The practice location on file with NPPES is in Castro Valley, CA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Rahel Ruiz?
The National Provider Identifier (NPI) for Rahel Ruiz is 1821089129, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-12-24.