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Oksana Lelyukh Kostyukevich , PA-C

Physician Assistant β€’ Downey, CA

Active NPI 1720768898 Individual Practitioner Female Practitioner
Practice location in NPPES

11938 Paramount Blvd
Downey, CA 902422306

Call 5629236060 Location details and other listings
Medical Disclaimer

This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.

Practice Location & Contact Primary Location

Practice Address

11938 Paramount Blvd

Downey, CA 902422306

Telephone 5629236060
Fax 5629236601
Organization at the Same NPPES Address or Phone
Elaine Y. Lau, D.d.s. Facility NPI 1902911605

Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.

Other Listings in Public Data

NPPES lists 2 distinct additional practice-address records in Downey, CA; Huntington Beach, CA. See the list

Source: CMS NPPES NPI Registry, practice location records; release date unavailable.

Listings do not confirm current availability, employment or a shared ownership network.

Medicare Profile & Education

Source: CMS Doctors and Clinicians National Downloadable File

Graduation Year

2022

30-day fills

241 standardized 30-day fills in 2024

CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.

What this does not show: 30-day fills

It is not a count of patients and not a measure of quality.

Part D drug cost

$1,248 in 2024

The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.

What this does not show: Part D drug cost

A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.

Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024.

Open Payments general payments, program year 2025

All general payments: $206.63 across 6 records.

By nature of payment

  • Food and Beverage: $206.63 across 6 records.

Reporting-company totals (3 largest of 5)

  • W. L. Gore & Associates, Inc.: $78.38 across 2 records.
  • Baxter Healthcare: $56.42 across 1 record.
  • Smith+Nephew, Inc.: $32.65 across 1 record.

A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.

See the full table

Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2025 (published June 30, 2026).

Guide: How to read an Open Payments record

Years since graduation

4 years (graduated 2022)

CMS Doctors and Clinicians data list 2022 as the year this clinician finished professional school.

What this does not show: Years since graduation

It is not the number of years in practice, and more years does not mean better care.

Source: CMS Doctors and Clinicians National Downloadable File.

NPI first issued

2023

The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.

What this does not show: NPI first issued

NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.

Source: CMS NPPES NPI Registry.

May accept Medicare assignment

CMS data show this clinician may accept Medicare assignment. Clinicians who do not always accept assignment can decide case by case.

Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.

Source: CMS Doctors and Clinicians; Medicare.gov, β€œDoes your provider accept Medicare as full payment?”

Guide: What Medicare assignment means

No telehealth indicator

CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.

Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.

Guide: How Medicare covers telehealth

Enrolled in Medicare (PECOS)

Oksana Kostyukevich has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.

It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.

Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.

Guide: What Medicare enrollment (PECOS) means

Can order Medicare-covered services

CMS lists Oksana Kostyukevich as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.

What this does not show: Can order Medicare-covered services

It does not mean the clinician offers these services directly.

Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.

Guide: What ordering and referring status means

Compared with the same specialty in Downey and California

Billing and prescribing volume is not a quality rating.

Medicare Part D prescriptions

Fewer Part D prescriptions than 70% of clinicians listed under Physician Assistant in Downey, CA (2024, 32 clinicians with data). Median for this group: 349. Middle half: 201 to 1,415.

Close to the middle for clinicians listed under Physician Assistant in California (2024, 7,516 clinicians with data). Median for this group: 229. Middle half: 72 to 718.

Part D drug cost

A lower Part D drug cost than 80% of clinicians listed under Physician Assistant in Downey, CA (2024, 32 clinicians with data). Median for this group: $19,398. Middle half: $2,151 to $289,744.

A lower Part D drug cost than 65% of clinicians listed under Physician Assistant in California (2024, 7,516 clinicians with data). Median for this group: $3,945. Middle half: $709 to $60,209.

49 active clinicians are listed under Physician Assistant with a practice address in Downey, CA (14,458 in California).

Addresses are self-reported to NPPES and may be out of date.

Telehealth indicator in Downey

8.2% of these 49 clinicians have the CMS telehealth indicator.

40.8% of these 49 clinicians are listed by CMS as accepting Medicare assignment.

Sources: CMS Medicare Part D Prescribers (2024), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.

Text: T-MedInfo Β· Report an error.

Pharma & Medical Device Financial Disclosures

Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments

Open Payments Β· Program Year 2025
Disclosure Year:

Program year 2025 (payments made January 1 – December 31, 2025): fewer than 11 records totaling $206.63.

Manufacturer Payment Nature Product Type Amount ($)
Baxter Healthcare
Food and Beverage
In-kind items and services
FLOSEAL General $56.42
W. L. Gore & Associates, Inc.
Food and Beverage
In-kind items and services
EXCLUDER Conformable AAA Endoprosthesis with Active Control General $44.35
W. L. Gore & Associates, Inc.
Food and Beverage
In-kind items and services
EXCLUDER Conformable AAA Endoprosthesis with Active Control General $34.03
Smith+Nephew, Inc.
Food and Beverage
In-kind items and services
PICO 7 General $32.65
InspireMD Ltd
Food and Beverage
In-kind items and services
CGuard Prime Carotid Stent System General $22.67
Integra LifeSciences Corporation
Food and Beverage
In-kind items and services
Integra General $16.51

Source: CMS Open Payments, program year 2025, released June 30, 2026.

Medicare Part D Prescribing Profile & Medications

Medicare Part D prescriptions filled, including refills, in 2024.

CMS Part D Β· Data Year 2024
Prescription Year:
Brand Name Generic Name Prescriptions Day Supply Total Cost Patients
Azithromycin Azithromycin 44 220 $101.54 43
Fluticasone Propionate Fluticasone Propionate 29 1,364 $229.92 27
Lidocaine Hcl Viscous Lidocaine Hcl 22 127 $179.25 21
Nitrofurantoin Mono-Macro Nitrofurantoin Monohyd/M-Cryst 21 141 $156.11 21
Ibuprofen Ibuprofen 16 198 $52.87 15
Omeprazole Omeprazole 14 891 $40.61 β€”
Albuterol Sulfate Hfa Albuterol Sulfate 14 303 $320.78 14
Methylprednisolone Methylprednisolone 13 78 $65.60 13
Triamcinolone Acetonide Triamcinolone Acetonide 12 204 $43.06 β€”
Meloxicam Meloxicam 11 330 $14.92 β€”
Sulfamethoxazole-Trimethoprim Sulfamethoxazole/Trimethoprim 11 80 $42.90 11

Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits

Specialties & License Numbers Reported to NPPES

Self-certified to NPPES: 2026-08-07
Physician Assistant Primary Specialty

NUCC Taxonomy Code: 363A00000X

License # reported to NPPES None PA63203

A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.

Check License Status with the State Board License numbers are self-reported to NPPES; T-MedInfo does not confirm them against state records. Current status: Medical Board of California.
Look Up on State Board Site

Medicare (PECOS) Enrollment & Ordering Eligibility

Source: CMS PECOS
Medicare FFS Enrollment Status Medicare Enrollment on File
CMS Provider Specialty

PRACTITIONER - PHYSICIAN ASSISTANT

Medicare Enrollment ID

I20240913001477

Enrollment State Jurisdiction

CA

PECOS Control ID

0143760355

Medicare Order & Referring Eligibility
Clinical Lab & Imaging (Part B) Eligible
Durable Medical Equipment (DME) Eligible
Home Health Agency (HHA) Eligible
Power Mobility Devices (PMD) Eligible

Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.

Secondary Practice Locations

8500 Florence Ave Ste 101

Downey, CA 902404062

Phone: 5622025020

7521 Edinger Ave Unit 1612

Huntington Beach, CA 926473585

Phone: 9522170890

Clinicians Sharing This Practice Address or Phone

Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.

9 listed
Ifeoma Aniemeka

Nurse Practitioner - Family

NPI 1649804386
Yunji Kim , NP

Nurse Practitioner - Primary Care

NPI 1144786369

Nurse Practitioner

Bubbles Meneses , NP

Nurse Practitioner - Primary Care

NPI 1821500216

Nurse Practitioner

Katie Nguyen , FNP

Nurse Practitioner

NPI 1851839880

Family Nurse Practitioner

Wendy Nguyen , PA-C

Physician Assistant - Medical

NPI 1508249962

Physician Assistant (Certified)

Helen Njoku

Nurse Practitioner

NPI 1528692217

Career & Practice History Timeline

Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status

9 Historical Events
πŸ“
Updated Practice Location October 11, 2023

Registered at 11938 PARAMOUNT BLVD, DOWNEY, CA 902422306 (Tel: 5629236060)

πŸ“
Updated Business Mailing Address October 11, 2023

Registered at 11938 PARAMOUNT BLVD, DOWNEY, CA 902422306 (Tel: 5629236060)

πŸŽ“
Medical Taxonomy / Specialty Registered (Primary Specialty) October 11, 2023

Physician Assistant (license number reported to NPPES: None PA63203)

βœ…
NPI Profile Active July 24, 2023

NPI status registered as active in NPPES database

πŸ“
Practice Location (Initial Record) July 24, 2023

Registered at 7521 EDINGER AVE UNIT 1612, HUNTINGTON BEACH, CA 926473585 (Tel: 9522170890)

πŸ“
Business Mailing Address (Initial Record) July 24, 2023

Registered at 7521 EDINGER AVE UNIT 1612, HUNTINGTON BEACH, CA 926473585 (Tel: 9522170890)

πŸ‘€
Provider Name / Credentials (Initial Record) July 24, 2023

Recorded as OKSANA KOSTYUKEVICH, PA-C

πŸŽ“
Medical Taxonomy / Specialty Registered (Primary Specialty) July 24, 2023

Physician Assistant

🟒
Initial NPI Registration & Enumeration July 24, 2023

First registered as active Individual Practitioner in NPPES Database.

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NPI Administrative Meta

NPI Number: 1720768898
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: July 24, 2023
Last Update: August 07, 2026
Sole Proprietor: No

Other Physician Assistants in Downey

All Physician Assistants in Downey

Mailing Address

11938 Paramount Blvd

Downey, CA 902422306

Phone: 5629236060

About This Data NPPES fields (address, phone, specialty, license) are self-reported and may be outdated; Medicare fields follow the CMS dataset named in each section. Correct directly at NPPES.