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

Dr. Simon Grock, DDS

Dentist in Marina Del Rey, CA · enumerated 2016 · practices at Simon Grock DDS Apc.

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

National Provider Identifier

1235590787

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dr. Simon Grock

Credential DDS

Sex Male

Practice address Marina Del Rey, CA, 90292

Phone (310) 384-3404

Enumeration date Mar 11, 2016

Last updated in NPPES Mar 11, 2016

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

Taxonomy & licenses

122300000X Dentist Dental Providers · License 26412 (CA) Primary

DDS · Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS 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

Is NPI 1235590787 active?

Yes, as of the latest NPPES snapshot, NPI 1235590787 is active (record last updated 2016-03-11).

How do I verify Simon Grock's NPI record?

Cross-check NPI 1235590787 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

Browse all →

Simon Grock DDS Apc General Practice Dentistry · Marina Del Rey, CA NPI 1184034894

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-03-11.