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

MAZZOCCO AMBULATORY SURGICAL CENTER
NPI 1255314662
Clinic/Center - Ambulatory Surgical in Van Nuys, CA

Active since November 21, 2005
15243 VANOWEN ST, VAN NUYS, CA 91405(818) 787-2020(818) 787-8652 Get Directions Write a Review

NPPES record last updated: June 22, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Aug 22, 2023, Aug 22, 2020 (2 updates tracked since 2020).

About Mazzocco Ambulatory Surgical Center NPPES

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

MAZZOCCO AMBULATORY SURGICAL CENTER (NPI 1255314662) is a healthcare organization registered as an ambulatory surgical in Van Nuys, California and active in the NPI registry since November 2005. The organization lists George M Rajacich, Owner, as its authorized official.

NPPES Registry Identity

NPI1255314662
Entity TypeOrganization
Primary Taxonomy261QA1903X
Legal Business NameMAZZOCCO AMBULATORY SURGICAL CENTER
Location Address15243 VANOWEN STVan Nuys, CA 91405-3605
Mailing Address14624 Sherman Way Ste 508Van Nuys, CA 91405-2289 · (818) 787-2020 · Fax (818) 787-8652
Phone(818) 787-2020
Fax(818) 787-8652
Organization SubpartNo
Authorized OfficialGeorge M RajacichOwner · (818) 787-2020
Enumeration DateNovember 21, 2005
Last NPPES UpdateJune 22, 20262 updates tracked since enumeration
NPPES CertifiedJune 22, 2026
✔ NPI 1255314662 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyClinic/Center · Ambulatory SurgicalAmbulatory Health Care Facilities
Taxonomy Code261QA1903X
15243 VANOWEN ST, Van Nuys, CA 91405
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CLIA Laboratory Certificates CMS CLIA

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Waiver 05D0949085

Mazzocco Ambulatory Surgical Center Inc · Van Nuys, CA
Expired · Jul 23, 2026
CLIA Number05D0949085
Laboratory TypeAmbulatory Surgery Center
Certificate Effective DateJuly 24, 2024
Certificate Expiration DateJuly 23, 2026
Laboratory DirectorGeorge M. Rajacich
Laboratory Phone(818) 781-2020
Laboratory LocationMazzocco Ambulatory Surgical Center Inc15243 Vanowen St Suite 202, Van Nuys, CA 91405
CLIA data matches this NPI record on: Address Name
This certificate is issued to a laboratory to perform only waived tests.

Areas of Expertise CMS Part B claims 5

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Removal of recurring cataract in lens capsule using a laser 66821
This procedure, known as YAG laser capsulotomy, treats cloudiness in the lens capsule following cataract surgery. A laser is used to create a small hole in the cloudy capsule, allowing light to pass through and restore clear vision. It's a quick, painless procedure.
90 services69 patients
Removal of cataract with insertion of prosthetic lens 66984
This is a procedure where a cloudy lens in your eye, known as a cataract, is removed. After removal, a clear artificial lens is inserted. This helps to restore your vision, enabling you to see clearly again.
77 services56 patients
Laser repair to improve eye fluid flow 65855
Laser repair to improve eye fluid flow is a procedure aimed at treating glaucoma. A laser is used to create a small hole in the eye's drainage system, allowing fluid to flow out more easily. This helps to lower the pressure inside the eye, reducing the risk of vision loss.
38 services28 patients
Complex removal of cataract with insertion of prosthetic lens 66982
This procedure involves removing a cloudy lens (cataract) from your eye and replacing it with a clear, artificial lens. It helps restore vision that has been affected by the cataract. The operation is usually done under local anesthesia.
30 services26 patients
Creation of eye fluid drainage tracts in iris using a laser, per session 66761
This procedure uses a laser to create small drainage tracts in the iris, the colored part of your eye. This helps excess fluid escape, reducing pressure in the eye that can cause glaucoma. It's performed in sessions.
19 services14 patients

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.

DR. MITCHELL NISHIMOTO M.D.
Internal Medicine
15243 VANOWEN ST, SUITE 406
VAN NUYS, CA 91405
Los Angeles County (818) 785-3889
KYU HYUN KIM MD
Pediatrics
15243 VANOWEN ST, SUITE 300
VAN NUYS, CA 91405
Los Angeles County (818) 786-4910
DR. TIMOTHY MESS M.D.
Internal Medicine (Infectious Disease)
15243 VANOWEN ST, SUITE 406
VAN NUYS, CA 91405
Los Angeles County (818) 782-5450
CHARLES E WEIDMANN MD A PROFESSIONAL MEDICAL CORPORATION
Internal Medicine (Rheumatology)
15243 VANOWEN ST, STE 306
VAN NUYS, CA 91405
Los Angeles County (818) 781-0232
COWDREY'S VANOWEN TOWER PHARMACY, INC
Pharmacy (Community/Retail Pharmacy)
15243 VANOWEN ST, SUITE 100
VAN NUYS, CA 91405
Los Angeles County (818) 781-0111
KYU HYUN KIM MD INC
Pediatrics
15243 VANOWEN ST, SUITE 300
VAN NUYS, CA 91405
Los Angeles County (818) 786-4910
JADE T. ONG DDS. INC.
Dentist (General Practice)
15243 VANOWEN ST, SUITE 404
VAN NUYS, CA 91405
Los Angeles County (818) 908-1175
DR. MEE SOOK KIM M.D.
Obstetrics & Gynecology
15243 VANOWEN ST, SUITE 504
VAN NUYS, CA 91405
Los Angeles County (818) 781-8972

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 Mazzocco Ambulatory Surgical Center's NPI number?

The NPI number for Mazzocco Ambulatory Surgical Center is 1255314662. It was assigned to this organization in the NPPES registry on November 21, 2005.

Where is Mazzocco Ambulatory Surgical Center located?

Mazzocco Ambulatory Surgical Center is located at 15243 Vanowen St, Van Nuys, CA 91405. The listed phone number is (818) 787-2020.

What is Mazzocco Ambulatory Surgical Center's specialty?

The primary specialty registered for this NPI is Clinic/Center, specializing in Ambulatory Surgical, with taxonomy code 261QA1903X.

When was this NPI record last updated?

The NPPES record for Mazzocco Ambulatory Surgical Center was last updated on June 22, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 46 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.