Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

MICHAEL M LOCK MD
NPI 1154357564
Radiology - Radiation Oncology in Mission Viejo, CA

Q: What is Michael Lock's NPI number?

The NPI number for Michael Lock is 1154357564. It was assigned to this individual provider in the NPPES registry on June 25, 2006.

Q: What is Michael Lock's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Radiation Oncology, with taxonomy code 2085R0001X.

Q: When was this NPI record last updated?

The NPPES record for Michael Lock was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 34 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since June 25, 2006

27800 MEDICAL CENTER RD, SUITE 160, MISSION VIEJO, CA 92691(949) 364-9120(949) 364-8465 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

On this page

About Michael M Lock Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MICHAEL M LOCK MD (NPI 1154357564) is an individual radiation oncology provider in Mission Viejo, California, licensed in California (G49709) and active in the NPI registry since June 2006.

NPPES Registry Identity

NPI1154357564

Entity TypeIndividualMale

Primary Taxonomy2085R0001X

Provider Legal NameMICHAEL M LOCKCredential: MD

Location Address27800 MEDICAL CENTER RD, SUITE 160Mission Viejo, CA 92691-6410

Mailing Address4822 Tocaloma LnLa Canada, CA 91011-1666 · (818) 952-1082

Phone(949) 364-9120

Fax(949) 364-8465

Sole ProprietorNo

Enumeration DateJune 25, 2006

Last NPPES UpdateJuly 13, 2026

✔ NPI 1154357564 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyRadiology · Radiation OncologyAllopathic & Osteopathic Physicians

Taxonomy Code2085R0001X

License✔ Licensed in CA · G49709

Definition

A radiologist who deals with the therapeutic applications of radiant energy and its modifiers and the study and management of disease, especially malignant tumors.

27800 MEDICAL CENTER RD, Mission Viejo, CA 92691

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Other Identifiers 1

Medicaid00G497090CA

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

THEODORE J. CALIENDO, M.D., A MEDICAL CORPORATION

Pediatrics

27800 MEDICAL CENTER RD, SUITE 204
MISSION VIEJO, CA 92691

Orange County (949) 364-3691

KENNETH K PADDIE A PROFESSIONAL CORP

Otolaryngology

27800 MEDICAL CENTER RD, SUITE 261
MISSION VIEJO, CA 92691

Orange County (949) 364-2555

MEDINA PEDIATRICS, INC.

Pediatrics (Neonatal-Perinatal Medicine)

27800 MEDICAL CENTER RD, SUITE 204
MISSION VIEJO, CA 92691

Orange County (949) 364-3532

REXINGER MEDICAL GROUP, INC.

Family Medicine

27800 MEDICAL CENTER RD, SUITE 461
MISSION VIEJO, CA 92691

Orange County (949) 364-5600

DR. BRETT MICHAEL WERTMAN M.D.

Internal Medicine (Cardiovascular Disease)

27800 MEDICAL CENTER RD, SUITE 222
MISSION VIEJO, CA 92691

Orange County (949) 276-2446

JACKSON MOSES, DDS, INC

Dentist (Oral and Maxillofacial Surgery)

27800 MEDICAL CENTER RD, 238
MISSION VIEJO, CA 92691

Orange County (949) 364-0220

BRITTANY DANIELLE FARMER ACSW

Social Worker (Clinical)

27800 MEDICAL CENTER RD
MISSION VIEJO, CA 92691

Orange County (949) 866-3600

DR. ANDREW CHANG

Dentist (Pediatric Dentistry)

27800 MEDICAL CENTER RD, SUITE 332
MISSION VIEJO, CA 92691

Orange County (949) 364-1171

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Michael Lock's NPI number?

The NPI number for Michael Lock is 1154357564. It was assigned to this individual provider in the NPPES registry on June 25, 2006.

Where is Michael Lock located?

Michael Lock practices at 27800 Medical Center Rd Suite 160, Mission Viejo, CA 92691. The listed phone number is (949) 364-9120.

What is Michael Lock's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Radiation Oncology, with taxonomy code 2085R0001X.

When was this NPI record last updated?

The NPPES record for Michael Lock was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 34 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.