Dr. Ayman Hisham Youssef , MD
Internal Medicine β’ Seattle, WA
1959 Ne Pacific St
Seattle, WA 981950001
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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Dr. Ayman Youssef is listed in NPPES under Internal Medicine.
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NPI assigned on March 28, 2022; this date does not establish years in practice.
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Published CMS data list 130 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Rosuvastatin Calcium β 23 prescription fills, including refills.
- Amlodipine Besylate β 19 prescription fills, including refills.
- Losartan Potassium β 19 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 8 records in the table Β· Guide: How to read Medicare Part D prescriber data
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Fewer Part D prescriptions than 70% of clinicians listed under Internal Medicine in Seattle, WA (2024, 381 clinicians with data). Median for this group: 875. Middle half: 121 to 2,630.
Fewer Part D prescriptions than 70% of clinicians listed under Internal Medicine in Washington (2024, 1,654 clinicians with data). Median for this group: 834. Middle half: 101 to 3,989.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part D prescriptions went from 76 in 2023 to 130 in 2024.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2023β2024.
Practice Location & Contact Primary Location
1959 Ne Pacific St
Seattle, WA 981950001
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
CMS Doctors and Clinicians lists 1 group name: The Association Of University Physicians. See the list
Source: CMS Doctors and Clinicians National Downloadable File, 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
2022
What Public CMS Data Show
Internal Medicine: NPPES taxonomy is a reported classification, not proof of board certification.
30-day fills
269 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
$1,032 in 2024
The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
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 β by Provider and Drug, 2024.
Industry payments (Open Payments)
No Open Payments records are listed for this clinician for 2019β2025.
Years since graduation
4 years (graduated 2022)
CMS Doctors and Clinicians data list 2022 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished 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
2022
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.
Accepts Medicare assignment
CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.
With Original Medicare, you usually pay only your deductible and coinsurance, and the office sends the claim to Medicare for you.
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, βDoes your provider accept Medicare as full payment?β
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.
Enrolled in Medicare (PECOS)
Dr. Youssef 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.
Can order Medicare-covered services
CMS lists Dr. Youssef 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.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
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.
Compared with the same specialty in Seattle and Washington
Billing and prescribing volume is not a quality rating.
Medicare Part D prescriptions
Fewer Part D prescriptions than 70% of clinicians listed under Internal Medicine in Seattle, WA (2024, 381 clinicians with data). Median for this group: 875. Middle half: 121 to 2,630.
Fewer Part D prescriptions than 70% of clinicians listed under Internal Medicine in Washington (2024, 1,654 clinicians with data). Median for this group: 834. Middle half: 101 to 3,989.
Part D drug cost
A lower Part D drug cost than 85% of clinicians listed under Internal Medicine in Seattle, WA (2024, 381 clinicians with data). Median for this group: $73,115. Middle half: $8,159 to $248,861.
A lower Part D drug cost than 80% of clinicians listed under Internal Medicine in Washington (2024, 1,654 clinicians with data). Median for this group: $61,689. Middle half: $2,998 to $293,737.
821 active clinicians are listed under Internal Medicine with a practice address in Seattle, WA (3,081 in Washington).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Seattle
26.8% of these 821 clinicians have the CMS telehealth indicator.
49.7% of these 821 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 71% from 76 in 2023 to 130 in 2024.
- 2023: 76
- 2024: 130
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30-day fills
30-day fills increased 89% from 143 in 2023 to 269 in 2024.
- 2023: 143
- 2024: 269
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Part D drug cost
Part D drug cost went from $949 in 2023 to $1,032 in 2024.
- 2023: $949
- 2024: $1,032
Sources: CMS Medicare Part D Prescribers (2024), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo Β· Report an error.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Rosuvastatin Calcium | Rosuvastatin Calcium | 23 | 1,710 | $447.42 | β |
| Amlodipine Besylate | Amlodipine Besylate | 19 | 1,485 | $69.51 | β |
| Losartan Potassium | Losartan Potassium | 19 | 860 | $94.89 | β |
| Atorvastatin Calcium | Atorvastatin Calcium | 18 | 900 | $117.45 | β |
| Lisinopril | Lisinopril | 14 | 1,260 | $84.00 | β |
| Furosemide | Furosemide | 13 | 720 | $52.30 | β |
| Metoprolol Succinate | Metoprolol Succinate | 13 | 615 | $136.51 | β |
| Spironolactone | Spironolactone | 11 | 510 | $29.69 | β |
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: 2026-07-29NUCC Taxonomy Code: 207R00000X
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.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - INTERNAL MEDICINE
I20250416003571
WA
9638556780
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Medicare Group Practice Enrollments
Source: CMS Doctors and Clinicians National Downloadable File
The Association Of University Physicians
1959 Ne Pacific St, Seattle, WA 981950001
Phone: 2065984333
The Association Of University Physicians
325 9th Ave, Seattle, WA 981042420
Phone: 2067313000
The Association Of University Physicians
1701 Columbia Rd, Seattle, WA 981950001
Phone: 2065983100
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Internal Medicine - Pulmonary Disease
Internal Medicine - Pulmonary Disease
Doctor of Medicine (M.D.)
Internal Medicine - Allergy & Immunology
Doctor of Medicine (M.D.)
Internal Medicine - Nephrology
Doctor of Medicine (M.D.)
Internal Medicine - Pulmonary Disease
Internal Medicine - Nephrology
Doctor of Medicine (M.D.)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 1959 NE PACIFIC ST, SEATTLE, WA 981950001 (Tel: 2065984615)
Internal Medicine (license number reported to NPPES: WA MD.MD.61572787)
Registered at 325 9TH AVE, SEATTLE, WA 981042420 (Tel: 2065205000)
Registered at PO BOX 50095, SEATTLE, WA 981455095 (Tel: 2065205700)
Recorded as AYMAN YOUSSEF, MD
Internal Medicine (license number reported to NPPES: WA MD61572787)
NPI status registered as active in NPPES database
Registered at 1959 NE PACIFIC ST BOX : 356421, SEATTLE, WA 981956421 (Tel: 2065433605)
Registered at 1959 NE PACIFIC ST BOX : 356421, SEATTLE, WA 981956421 (Tel: 2065433605)
Recorded as AYMAN YOUSSEF
Student in an Organized Health Care Education/Training Program
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Internal Medicine Providers in Seattle
- Dr. Elaine Sachter, MD
- Dr. Jason Eintracht, MD
- Dr. Patrick Mcadams, MD
- Dr. David Dugdale, MD
- Dr. Bruce Bonsack, MD
- Dr. Tess Jankovsky, MD
Mailing Address
Po Box 50095
Seattle, WA 981455095
Phone: 2065205700