NPI Portal NPI Lookup & Verification

Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Health Diagnostics of California LLC

Radiology Clinic/Center in San Rafael, CA · enumerated 2006 · authorized official Howard Simon, President.

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

National Provider Identifier

1699706648

Verified

See something wrong? Report a correction

Registry record

Entity type Organization (Type 2)
Legal business name Health Diagnostics of California LLC
Other name <Unavail>
Practice address 4144 Redwood Hwy, Suite B, San Rafael, CA, 94903
Phone (415) 479-9907
Fax (415) 479-9908
Enumeration date Jul 6, 2006
Last updated in NPPES Dec 20, 2011

Taxonomy & classification

261QR0200X Radiology Clinic/Center Ambulatory Health Care Facilities · License 040095 (CA) Primary

Authorized official

Name Howard Simon
Title President
Phone (480) 264-2400

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 Health Diagnostics of California LLC?
The NPI for Health Diagnostics of California LLC is 1699706648, a Type 2 (organization) record in the CMS NPPES registry.
Who is the authorized official for Health Diagnostics of California LLC?
NPPES lists Howard Simon (President) as the authorized official for this organization.

Providers at this address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-12-20.