DR. MARGARITA M. SERGONIS M.D.
NPI 1790097251
Hospitalist in Seattle, WA

Q: What is Margarita Sergonis's NPI number?

The NPI number for Margarita Sergonis is 1790097251. It was assigned to this individual provider in the NPPES registry on July 12, 2010.

Q: What is Margarita Sergonis's specialty?

The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.

Active since July 12, 2010PECOS Enrolled

1631 15TH AVE W STE 103, SEATTLE, WA 98119(206) 752-5634 Get Directions Write a Review

NPPES record last updated: November 4, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Nov 4, 2025, May 23, 2018, Feb 10, 2016 (3 updates tracked since 2016).

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About Dr. Margarita M. Sergonis M.d. NPPES

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

DR. MARGARITA M. SERGONIS M.D. (NPI 1790097251) is an individual hospitalist provider in Seattle, Washington, licensed in Pennsylvania (MD448793) and active in the NPI registry since July 2010. She is enrolled in Medicare PECOS and maintains a secondary practice location in Seattle.

NPPES Registry Identity

NPI1790097251

Entity TypeIndividualFemale

Primary Taxonomy208M00000X

Provider Legal NameDR. MARGARITA M. SERGONISCredential: M.D.

Location Address1631 15TH AVE W STE 103Seattle, WA 98119-2792

Mailing AddressPo Box 191Rockland, DE 19732-0191 · Fax (302) 651-4945

Phone(206) 752-5634

Sole ProprietorNo

Enumeration DateJuly 12, 2010

Last NPPES UpdateNovember 4, 20253 updates tracked since enumeration

NPPES CertifiedNovember 4, 2025

✔ NPI 1790097251 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyHospitalistAllopathic & Osteopathic Physicians

Taxonomy Code208M00000X

License✔ Licensed in PA · MD448793

Definition

Hospitalists are physicians whose primary professional focus is the general medical care of hospitalized patients. Their activities include patient care, teaching, research, and leadership related to Hospital Medicine. The term 'hospitalist' refers to physicians whose practice emphasizes providing care for hospitalized patients.

Also ListedPediatricsTaxonomy 208000000X · License MD448793 (PA)

1631 15TH AVE W STE 103, Seattle, WA 98119

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Secondary Practice Location 1

Location 1747 BroadwaySeattle, WA 98122-4379 · Phone (206) 386-2101

Accepted Insurance

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

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Margarita M. Sergonis M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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 Reassignment

Medicare enrollment records show Margarita Sergonis reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Swedish Health Services

3.0 mi

Internal Medicine

800 5TH AVE, STE 600
Seattle, WA 98104

Reassigned Medicare billing, Washington enrollment
1,270 clinicians in this Medicare group

NPI 1689612954 (206) 320-2700

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 98119 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

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

PUFFIN PEDIATRICS, PLLC

Clinic/Center (Primary Care)

1631 15TH AVE W STE 103
SEATTLE, WA 98119

King County (206) 752-5634

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 Margarita Sergonis's NPI number?

The NPI number for Margarita Sergonis is 1790097251. It was assigned to this individual provider in the NPPES registry on July 12, 2010.

Where is Margarita Sergonis located?

Margarita Sergonis practices at 1631 15th Ave W Ste 103, Seattle, WA 98119. The listed phone number is (206) 752-5634.

What is Margarita Sergonis's specialty?

The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.

Is Margarita Sergonis enrolled in Medicare?

Yes. Margarita Sergonis is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Margarita Sergonis's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Margarita Sergonis reassigns Medicare benefits to Swedish Health Services (Seattle, WA). The 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 Margarita Sergonis's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Margarita Sergonis accept?

Health plans from Premera Blue Cross Blue Shield of Alaska and Providence Health Plan list Margarita Sergonis 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.

When was this NPI record last updated?

The NPPES record for Margarita Sergonis was last updated on November 4, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.