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ISAAC S. DREYFUS MD
NPI 1104389923
Internal Medicine - Cardiovascular Disease in Seattle, WA

Active since April 09, 2019PECOS Enrolled
1959 NE PACIFIC ST, SEATTLE, WA 98195(206) 520-5000 Get Directions Write a Review

NPPES record last updated: June 10, 2026. Verified against the NPPES registry weekly; last sync: August 23, 2026.

About Isaac S. Dreyfus Md NPPES

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

ISAAC S. DREYFUS MD (NPI 1104389923) is an individual cardiovascular disease provider in Seattle, Washington, licensed in Washington (MD61648231) and active in the NPI registry since April 2019. He is enrolled in Medicare PECOS, is affiliated with University Of Washington Medical Ctr, and is a graduate of Other (2019).

NPPES Registry Identity

NPI1104389923
Entity TypeIndividualMale
Primary Taxonomy207RC0000X
Provider Legal NameISAAC S. DREYFUSCredential: MD
Location Address1959 NE PACIFIC STSeattle, WA 98195-0001
Mailing AddressPo Box 50095Seattle, WA 98145-5095
Phone(206) 520-5000
Sole ProprietorNo
Medical School CMSOtherGraduated 2019
Enumeration DateApril 9, 2019
Last NPPES UpdateJune 10, 2026
NPPES CertifiedJune 10, 2026
✔ NPI 1104389923 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Cardiovascular DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RC0000X
License✔ Licensed in WA · MD61648231
Definition
An internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threatening, abnormal heartbeat rhythms.
Also ListedInternal MedicineTaxonomy 207R00000X · License MD61648231 (WA)
1959 NE PACIFIC ST, Seattle, WA 98195
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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Isaac S. Dreyfus Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID7012245665
PECOS Enrollment IDI20260624003804
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.

University Of Washington Medical Ctr

Acute Care Hospitals · Seattle, WA
3/5 CMS rating
OwnershipGovernment - State
CMS Certification Number500008
Location1959 NE Pacific St Box 356151Seattle, WA 98195 · King County
Emergency services Birthing friendly

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
$78.74 typical visit price
range $21.12 – $155.00
Typical copayment $19.68 (range $5.28 – $38.75)
Most-billed visit code 99213
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 Isaac Dreyfus's NPI number?

The NPI number for Isaac Dreyfus is 1104389923. It was assigned to this individual provider in the NPPES registry on April 9, 2019.

Where is Isaac Dreyfus located?

Isaac Dreyfus practices at 1959 NE Pacific St, Seattle, WA 98195. The listed phone number is (206) 520-5000.

What is Isaac Dreyfus's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.

Is Isaac Dreyfus enrolled in Medicare?

Yes. Isaac Dreyfus is registered in the Medicare PECOS enrollment system.

Is Isaac Dreyfus affiliated with any hospitals?

According to CMS data, Isaac Dreyfus is affiliated with University Of Washington Medical Ctr.

When was this NPI record last updated?

The NPPES record for Isaac Dreyfus was last updated on June 10, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 months 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.