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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.

AYMAN HISHAM YOUSSEF MD
NPI 1649920844
Internal Medicine in Seattle, WA

Active since March 28, 2022PECOS Enrolled
1959 NE PACIFIC ST, SEATTLE, WA 98195(206) 598-4615 Get Directions Write a Review

NPPES record last updated: July 29, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Ayman Hisham Youssef Md NPPES

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

AYMAN HISHAM YOUSSEF MD (NPI 1649920844) is an individual internal medicine provider in Seattle, Washington, licensed in Washington (MD.MD.61572787) and active in the NPI registry since March 2022. He is enrolled in Medicare PECOS, is affiliated with Harborview Medical Center, and is a graduate of Other (2022).

NPPES Registry Identity

NPI1649920844
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameAYMAN HISHAM YOUSSEFCredential: MD
Location Address1959 NE PACIFIC STSeattle, WA 98195-0001
Mailing AddressPo Box 50095Seattle, WA 98145-5095 · (206) 520-5700
Phone(206) 598-4615
Sole ProprietorNo
Medical School CMSOtherGraduated 2022
Enumeration DateMarch 28, 2022
Last NPPES UpdateJuly 29, 2026
NPPES CertifiedJuly 29, 2026
✔ NPI 1649920844 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in WA · MD.MD.61572787
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
1959 NE PACIFIC ST, Seattle, WA 98195
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Premera Blue Cross Blue Shield of Alaska.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Ayman Hisham Youssef 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 ID9638556780
PECOS Enrollment IDI20250416003571
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.

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Harborview Medical Center

Acute Care Hospitals · Seattle, WA
1/5 CMS rating
OwnershipGovernment - Local
CMS Certification Number500064
Location325 9th AvenueSeattle, WA 98104 · King County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 98195 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
$143.76 typical visit price
range $63.67 – $189.37
Typical copayment $35.94 (range $15.91 – $47.34)
Most-billed visit code 99204
Established Patient
$111.00 typical visit price
range $21.12 – $155.00
Typical copayment $27.75 (range $5.28 – $38.75)
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.

LEONIE A NEVILLE PHARMD
Pharmacist (Pharmacist Clinician (PhC)/ Clinical Pharmacy Specialist)
1959 NE PACIFIC ST
SEATTLE, WA 98195
King County (206) 598-4874
ALISA BETH KACHIKIS M.D.
Obstetrics & Gynecology (Maternal & Fetal Medicine)
1959 NE PACIFIC ST, 3RD FLOOR SW 350
SEATTLE, WA 98195
King County (206) 598-4070
MS. MARY PATRICIA DODGE MS, OTR/L
Occupational Therapist
1959 NE PACIFIC ST, MAILBOX 356490
SEATTLE, WA 98195
King County (206) 598-4830
RIKA SHIRAKAWA M.D.
Ophthalmology
1959 NE PACIFIC ST, BOX 365485
SEATTLE, WA 98195
King County (206) 558-9616
VEDA TSOI M.D.
Anesthesiology
1959 NE PACIFIC ST
SEATTLE, WA 98195
King County (801) 556-7628
KATHRYN TAMURA PHARM.D.
Pharmacist (Pharmacist Clinician (PhC)/ Clinical Pharmacy Specialist)
1959 NE PACIFIC ST, BOX 356015
SEATTLE, WA 98195
King County (206) 598-6060
DR. MARK ROBERT, MICHAEL KILGORE M.D.
Pathology (Anatomic Pathology & Clinical Pathology)
1959 NE PACIFIC ST, BOX 356100
SEATTLE, WA 98195
King County (206) 598-1821
DR. SERKAN MEHMET SAHIN M.D.
Hospitalist
1959 NE PACIFIC ST
SEATTLE, WA 98195
King County (206) 543-6420

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 Ayman Youssef's NPI number?

The NPI number for Ayman Youssef is 1649920844. It was assigned to this individual provider in the NPPES registry on March 28, 2022.

Where is Ayman Youssef located?

Ayman Youssef practices at 1959 NE Pacific St, Seattle, WA 98195. The listed phone number is (206) 598-4615.

What is Ayman Youssef's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Ayman Youssef enrolled in Medicare?

Yes. Ayman Youssef 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.

What insurance does Ayman Youssef accept?

Health plans from Premera Blue Cross Blue Shield of Alaska list Ayman Youssef as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Ayman Youssef affiliated with any hospitals?

According to CMS data, Ayman Youssef is affiliated with Harborview Medical Center.

When was this NPI record last updated?

The NPPES record for Ayman Youssef was last updated on July 29, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.