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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.

MATTHEW NATHAN DO
NPI 1598385601
Pediatrics in Issaquah, WA

Active since April 18, 2020PECOS Enrolled
6520 226TH PL SE STE 100, ISSAQUAH, WA 98027(425) 394-1680(425) 394-1674 Get Directions Write a Review

NPPES record last updated: August 28, 2026. Verified against the NPPES registry weekly; last sync: October 04, 2026.

Record update history: Aug 28, 2026, May 5, 2025, Aug 9, 2024 and 2 more (5 updates tracked since 2020).

About Matthew Nathan Do NPPES

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

MATTHEW NATHAN DO (NPI 1598385601) is an individual pediatrics provider in Issaquah, Washington, licensed in Washington (OP61558014) and active in the NPI registry since April 2020. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1598385601
Entity TypeIndividualMale
Primary Taxonomy208000000X
Provider Legal NameMATTHEW NATHANCredential: DO
Location Address6520 226TH PL SE STE 100Issaquah, WA 98027-7365
Mailing AddressPo Box 25608Salt Lake City, UT 84125-0608 · (206) 320-4476
Phone(425) 394-1680
Fax(425) 394-1674
Sole ProprietorNo
Enumeration DateApril 18, 2020
Last NPPES UpdateAugust 28, 20265 updates tracked since enumeration
NPPES CertifiedAugust 28, 2026
✔ NPI 1598385601 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians
Taxonomy Code208000000X
License✔ Licensed in WA · OP61558014
Definition
A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.
6520 226TH PL SE STE 100, Issaquah, WA 98027
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Other Identifiers 1

Medicaid2295903WA

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, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Matthew Nathan Do 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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 98027 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
$97.43 typical visit price
range $63.67 – $189.37
Typical copayment $24.35 (range $15.91 – $47.34)
Most-billed visit code 99203
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 3

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

TROY YI MD
Pediatrics
6520 226TH PL SE STE 100
ISSAQUAH, WA 98027
King County (425) 394-1680
DR. CHRISTEN B OSKOUIAN M.D.
Pediatrics
6520 226TH PL SE STE 100
ISSAQUAH, WA 98027
King County (425) 394-1680
JACQUELINE LE HUNZIKER MD
Pediatrics
6520 226TH PL SE STE 100
ISSAQUAH, WA 98027
King County (425) 394-1680

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 Matthew Nathan's NPI number?

The NPI number for Matthew Nathan is 1598385601. It was assigned to this individual provider in the NPPES registry on April 18, 2020.

Where is Matthew Nathan located?

Matthew Nathan practices at 6520 226th Pl SE Ste 100, Issaquah, WA 98027. The listed phone number is (425) 394-1680.

What is Matthew Nathan's specialty?

The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.

Is Matthew Nathan enrolled in Medicare?

Yes. Matthew Nathan is registered in the Medicare PECOS enrollment system.

What insurance does Matthew Nathan accept?

Health plans from Premera Blue Cross Blue Shield of Alaska and Providence Health Plan list Matthew Nathan 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 Matthew Nathan was last updated on August 28, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 40 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.