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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.

NGHI HOANG DINH MAI D.O
NPI 1487338224
Internal Medicine in Federal Way, WA

Active since June 12, 2023PECOS Enrolled
33501 1ST WAY S, FEDERAL WAY, WA 98003(253) 838-2400(253) 874-1637 Get Directions Write a Review

NPPES record last updated: September 25, 2026. Verified against the NPPES registry weekly; last sync: October 11, 2026.

Record update history: Sep 25, 2026, Nov 2, 2023, Jun 13, 2023 (3 updates tracked since 2023).

About Nghi Hoang Dinh Mai D.o NPPES

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

NGHI HOANG DINH MAI D.O (NPI 1487338224) is an individual internal medicine provider in Federal Way, Washington, licensed in Washington (OP61559573) and active in the NPI registry since June 2023. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1487338224
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameNGHI HOANG DINH MAICredential: D.O
Location Address33501 1ST WAY SFederal Way, WA 98003-6208
Mailing AddressPo Box 741515Los Angeles, CA 90074-1515 · (253) 838-2400 · Fax (253) 874-1637
Phone(253) 838-2400
Fax(253) 874-1637
Sole ProprietorNo
Enumeration DateJune 12, 2023
Last NPPES UpdateSeptember 25, 20263 updates tracked since enumeration
NPPES CertifiedSeptember 25, 2026
✔ NPI 1487338224 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 · OP61559573
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.
33501 1ST WAY S, Federal Way, WA 98003
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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)

Nghi Hoang Dinh Mai D.o 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 98003 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.

THOMAS M LANDINO DPM, FACFAS, PT
Podiatrist
33501 1ST WAY S
FEDERAL WAY, WA 98003
King County (253) 838-2400
KATHERINE R REDMON PAC
Physician Assistant (Surgical)
33501 1ST WAY S
FEDERAL WAY, WA 98003
King County (253) 838-2400
DELIA VIISOREANU M.D.
Internal Medicine
33501 1ST WAY S
FEDERAL WAY, WA 98003
King County (253) 838-2400
DAVID M KIERAS MD
Orthopaedic Surgery
33501 1ST WAY S
FEDERAL WAY, WA 98003
King County (253) 838-2400
LUCAS JASON MATHEW KAWTOSKI NP
Nurse Practitioner
33501 1ST WAY S
FEDERAL WAY, WA 98003
King County (253) 838-2400
CARMEN DITTMAN MD
Internal Medicine
33501 1ST WAY S
FEDERAL WAY, WA 98003
King County (253) 838-2400
MR. ADAM W. BRYANT P.A.-C
Physician Assistant (Medical)
33501 1ST WAY S
FEDERAL WAY, WA 98003
King County (253) 838-2400
CATHERINE TART
Pediatrics
33501 1ST WAY S
FEDERAL WAY, WA 98003
King County (253) 838-2400

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 Nghi Mai's NPI number?

The NPI number for Nghi Mai is 1487338224. It was assigned to this individual provider in the NPPES registry on June 12, 2023.

Where is Nghi Mai located?

Nghi Mai practices at 33501 1st Way S, Federal Way, WA 98003. The listed phone number is (253) 838-2400.

What is Nghi Mai's specialty?

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

Is Nghi Mai enrolled in Medicare?

Yes. Nghi Mai is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Nghi Mai was last updated on September 25, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 20 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.