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DR. RONALD LEE KORETZ MD
NPI 1265465579
Internal Medicine - Gastroenterology in Sylmar, CA

Active since July 09, 2006PECOS Enrolled
14445 OLIVE VIEW DR, DEPT MEDICINE OLIVE VIEW UCLA MEDICAL CENTER, SYLMAR, CA 91342(818) 364-3205(818) 364-4573 Get Directions Write a Review

NPPES record last updated: March 23, 2010. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Dr. Ronald Lee Koretz Md NPPES

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

DR. RONALD LEE KORETZ MD (NPI 1265465579) is an individual gastroenterology provider in Sylmar, California, licensed in California (A023109) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1265465579
Entity TypeIndividualMale
Primary Taxonomy207RG0100X
Provider Legal NameDR. RONALD LEE KORETZCredential: MD
Location Address14445 OLIVE VIEW DR, DEPT MEDICINE OLIVE VIEW UCLA MEDICAL CENTERSylmar, CA 91342
Mailing Address16847 Colven RdGranada Hills, CA 91344-1855 · (818) 360-2708 · Fax (818) 364-4573
Phone(818) 364-3205
Fax(818) 364-4573
Sole ProprietorNo
Enumeration DateJuly 9, 2006
Last NPPES UpdateMarch 23, 2010
✔ NPI 1265465579 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians
Taxonomy Code207RG0100X
License✔ Licensed in CA · A023109
Definition
An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.
Also ListedInternal MedicineTaxonomy 207R00000X · License A023109 (CA)
14445 OLIVE VIEW DR, Sylmar, CA 91342
Open in Google Maps ↗

Other Identifiers 1

Medicare UPINA23398

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Ronald Lee Koretz Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer– Part B Labs & Imaging✔ Durable Medical Equipment– Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 91342 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$142.39 typical visit price
range $62.96 – $187.60
Typical copayment $35.59 (range $15.74 – $46.90)
Most-billed visit code 99204
Established Patient
$109.96 typical visit price
range $20.84 – $153.61
Typical copayment $27.49 (range $5.21 – $38.40)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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.

COUNTY OF LOS ANGELES AUDITOR CONTROLLER
General Acute Care Hospital
14445 OLIVE VIEW DR
SYLMAR, CA 91342
Los Angeles County (818) 364-1555
DENNIS POON
Nurse Practitioner (Family)
14445 OLIVE VIEW DR
SYLMAR, CA 91342
Los Angeles County (747) 210-3000
SERENA KE MD
Student in an Organized Health Care Education/Training Program
14445 OLIVE VIEW DR
SYLMAR, CA 91342
Los Angeles County (747) 210-3205
DR. PAUL I LIU M.D.
Pathology (Anatomic Pathology & Clinical Pathology)
14445 OLIVE VIEW DR, ROOM 1A116
SYLMAR, CA 91342
Los Angeles County (818) 364-4033
DR. ARTHUR JENG M.D.
Internal Medicine (Infectious Disease)
14445 OLIVE VIEW DR, 2B182
SYLMAR, CA 91342
Los Angeles County (818) 364-3205
MRS. CECILIA CORONADO PTA
Physical Therapy Assistant
14445 OLIVE VIEW DR
SYLMAR, CA 91342
Los Angeles County (747) 210-4245
DR. RAMSES CESAR DELGADILLO MD
Internal Medicine
14445 OLIVE VIEW DR
SYLMAR, CA 91342
Los Angeles County (747) 210-3205
COUNTY OF LOS ANGELES AUDITOR CONTROLLER
General Acute Care Hospital
14445 OLIVE VIEW DR
SYLMAR, CA 91342
Los Angeles County (818) 364-1555

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 Ronald Koretz's NPI number?

The NPI number for Ronald Koretz is 1265465579. It was assigned to this individual provider in the NPPES registry on July 9, 2006.

Where is Ronald Koretz located?

Ronald Koretz practices at 14445 Olive View Dr Dept Medicine Olive View Ucla Medical Center, Sylmar, CA 91342. The listed phone number is (818) 364-3205.

What is Ronald Koretz's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Is Ronald Koretz enrolled in Medicare?

Yes. Ronald Koretz is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Ronald Koretz was last updated on March 23, 2010. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 years 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.