1. Home
  2. Directory
  3. California
  4. Glendale
  5. Specialist
  6. NPI Profile

LESLIE JOANA KOROSTOFF MD
NPI 1417096959
Specialist in Glendale, CA

Active since February 05, 2007PECOS EnrolledAccepts Medicare Assignment
1809 VERDUGO BLVD, STE 350, GLENDALE, CA 91208(818) 790-8121(818) 952-0926 Get Directions Write a Review

NPPES record last updated: July 27, 2022. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jul 27, 2022, Jul 14, 2016, Feb 25, 2016 (3 updates tracked since 2016).

About Leslie Joana Korostoff Md NPPES

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

LESLIE JOANA KOROSTOFF MD (NPI 1417096959) is an individual specialist in Glendale, California, licensed in California (A96824) and active in the NPI registry since February 2007. She is enrolled in Medicare PECOS and is a graduate of Saint Louis University School Of Medicine (1998).

NPPES Registry Identity

NPI1417096959
Entity TypeIndividualFemale
Primary Taxonomy174400000X
Provider Legal NameLESLIE JOANA KOROSTOFFCredential: MD
Location Address1809 VERDUGO BLVD, STE 350Glendale, CA 91208-1476
Mailing AddressPo Box 31309Los Angeles, CA 90031-0309 · (323) 442-5100 · Fax (818) 952-0926
Phone(818) 790-8121
Fax(818) 952-0926
Sole ProprietorYes
Medical School CMSSaint Louis University School Of MedicineGraduated 1998
Enumeration DateFebruary 5, 2007
Last NPPES UpdateJuly 27, 20223 updates tracked since enumeration
NPPES CertifiedJuly 27, 2022
✔ NPI 1417096959 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySpecialistOther Service Providers
Taxonomy Code174400000X
License✔ Licensed in CA · A96824
Definition
An individual educated and trained in an applied knowledge discipline used in the performance of work at a level requiring knowledge and skills beyond or apart from that provided by a general education or liberal arts degree.
1809 VERDUGO BLVD, Glendale, CA 91208
Open in Google Maps ↗

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Leslie Joana Korostoff Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID547278814
PECOS Enrollment IDI20091215000373
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.

Medicare Billing Reassignments

2

Medicare enrollment records show Leslie Korostoff reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Obstetrics & Gynecology Medical
Same address
Specialist
1809 VERDUGO BLVD STE 350
Glendale, CA 91208
  • Reassigned Medicare billing, California enrollment
  • Medicare enrollment name: Obstetrics & Gynecology Medical Group Of Verdugo Hills
  • 3 clinicians in this Medicare group
NPI 1821141185 (818) 790-8121
Usc Care Medical Group, Inc
9.9 mi
General Practice
1520 SAN PABLO ST
Los Angeles, CA 90033
  • Reassigned Medicare billing, California enrollment
  • 2,445 clinicians in this Medicare group
NPI 1902846306 (323) 442-5955

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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.

Cervical or vaginal cancer screening; pelvic and clinical breast examination G0101
This procedure involves checking for health issues in the lower abdomen and chest area. It helps identify early signs of certain conditions, increasing the chance for successful treatment. It's a routine check-up that's important for maintaining good health.
105 services105 patients
Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more 99212
This is a routine check-up for patients who have previously seen the doctor. During this 10-19 minute visit, the doctor will review your health status, discuss any concerns, and manage ongoing treatments or medications. It's a chance to ensure your health is on track.
59 services36 patients
New patient office or other outpatient visit with straightforward medical decision making, if using time, 15 minutes or more 99202
This service involves an initial visit to the doctor's office or other outpatient setting. It typically lasts between 15-29 minutes. The doctor will review your medical history, conduct a physical examination, and discuss your health concerns. It's a chance to establish your health baseline and address any immediate medical issues.
35 services35 patients
Screening papanicolaou smear; obtaining, preparing and conveyance of cervical or vaginal smear to laboratory Q0091
A Papanicolaou smear, often called a Pap smear, is a test to check for changes in cells. A small sample is gently collected from the lower region and sent to a lab for examination. This helps in early detection of potential health issues.
23 services23 patients
Ultrasound scan of uterus, ovaries, tubes, cervix and pelvic area through vagina 76830
An ultrasound scan of the lower abdominal region is a safe, non-invasive procedure that uses sound waves to create images of internal structures. This helps in checking the health of reproductive organs and detecting any abnormalities. The scan is done via a small probe inserted into the body.
21 services19 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. THOMAS YARGER POCOCK MD
Internal Medicine
1809 VERDUGO BLVD, #200
GLENDALE, CA 91208
Los Angeles County (818) 790-6700
MRS. NOREEN BEEVE P.A.-C.
Physician Assistant
1809 VERDUGO BLVD, SUITE #150
GLENDALE, CA 91208
Los Angeles County (818) 790-8001
DR. STANTON HENRY JOE M.D.
Specialist
1809 VERDUGO BLVD, SUITE 100
GLENDALE, CA 91208
Los Angeles County (818) 242-1133
DR. DONALD WHITNEY BARBER JR. MD
Internal Medicine
1809 VERDUGO BLVD, #200
GLENDALE, CA 91208
Los Angeles County (818) 790-4730
JEROLD EDMOND BEEVE MD
Ophthalmology
1809 VERDUGO BLVD, SUITE 150
GLENDALE, CA 91208
Los Angeles County (818) 790-8001
MR. JOSEPH A. MUTCH M.D.
Obstetrics & Gynecology
1809 VERDUGO BLVD, 350
GLENDALE, CA 91208
Los Angeles County (818) 790-8121
MS. CATHY DOREEN MILES M.A.
Counselor (Mental Health)
1809 VERDUGO BLVD, SUITE 260
GLENDALE, CA 91208
Los Angeles County (818) 353-5364
DR. TAMARA J KLUMPE PHD
Psychologist
1809 VERDUGO BLVD, SUITE 260
GLENDALE, CA 91208
Los Angeles County (818) 952-2730

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 Leslie Korostoff's NPI number?

The NPI number for Leslie Korostoff is 1417096959. It was assigned to this individual provider in the NPPES registry on February 5, 2007.

Where is Leslie Korostoff located?

Leslie Korostoff practices at 1809 Verdugo Blvd Ste 350, Glendale, CA 91208. The listed phone number is (818) 790-8121.

What is Leslie Korostoff's specialty?

The primary specialty registered for this NPI is Specialist with taxonomy code 174400000X.

Is Leslie Korostoff enrolled in Medicare?

Yes. Leslie Korostoff is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Leslie Korostoff's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Leslie Korostoff reassigns Medicare benefits to 2 organizations: Obstetrics & Gynecology Medical (Glendale, CA) and Usc Care Medical Group, Inc (Los Angeles, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Leslie Korostoff's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Leslie Korostoff was last updated on July 27, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.