Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

YOONJEE SIM AU.D.
NPI 1104714955
Audiologist in Seattle, WA

Q: What is Yoonjee Sim's NPI number?

The NPI number for Yoonjee Sim is 1104714955. It was assigned to this individual provider in the NPPES registry on June 27, 2025.

Q: What is Yoonjee Sim's specialty?

The primary specialty registered for this NPI is Audiologist with taxonomy code 231H00000X.

Q: When was this NPI record last updated?

The NPPES record for Yoonjee Sim was last updated on September 3, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 57 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.

Active since June 27, 2025Accepts Medicare Assignment

10330 MERIDIAN AVE N STE 270, SEATTLE, WA 98133(206) 668-7100 Get Directions Write a Review

NPPES record last updated: September 3, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Sep 3, 2026, Jun 27, 2025 (2 updates tracked since 2025).

On this page

About Yoonjee Sim Au.d. NPPES

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

YOONJEE SIM AU.D. (NPI 1104714955) is an individual audiologist in Seattle, Washington, licensed in Washington (AUD.LD.61687218) and active in the NPI registry since June 2025. She is a graduate of Other (2025).

NPPES Registry Identity

NPI1104714955

Entity TypeIndividualFemale

Primary Taxonomy231H00000X

Provider Legal NameYOONJEE SIMCredential: AU.D.

Location Address10330 MERIDIAN AVE N STE 270Seattle, WA 98133-9495

Mailing AddressPo Box 50095Seattle, WA 98145-5095 · (206) 520-5700

Phone(206) 668-7100

Sole ProprietorNo

Medical School CMSOtherGraduated 2025

Enumeration DateJune 27, 2025

Last NPPES UpdateSeptember 3, 20262 updates tracked since enumeration

NPPES CertifiedSeptember 3, 2026

✔ NPI 1104714955 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAudiologistSpeech, Language and Hearing Service Providers

Taxonomy Code231H00000X

License✔ Licensed in WA · AUD.LD.61687218

Definition

(1) A specialist in evaluation, habilitation and rehabilitation of those whose communication disorders center in whole or in part in hearing function. Audiologists are autonomous professionals who identify, assess, and manage disorders of the auditory, balance and other neural systems. Audiologists provide audiological (aural) rehabilitation to children and adults across the entire age span. Audiologists select, fit and dispense amplification systems such as hearing aids and related devices. (2) An audiologist is a person qualified by a master's degree in audiology, licensed by the state, where applicable, and practicing within the scope of that license. Audiologists evaluate and treat patients with impaired hearing. They plan, direct and conduct rehabilitative programs with audiotry substitutional devises (hearing aids) and other therapy.

10330 MERIDIAN AVE N STE 270, Seattle, WA 98133

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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 and accepts Medicare assignment

Yoonjee Sim Au.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID3072016021

PECOS Enrollment IDI20250915000882

Medicare Billing Reassignments

Medicare enrollment records show Yoonjee Sim reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

The Association Of University Physicians

6.9 mi

Anesthesiology

701 5TH AVE, SUITE 700
Seattle, WA 98104

Reassigned Medicare billing, Washington enrollment
4,364 clinicians in this Medicare group

NPI 1023041159 (206) 543-6420

Hear Northwest PLLC

18 mi

Audiologist

49 FRONT ST N
Issaquah, WA 98027

Reassigned Medicare billing, Washington enrollment
15 clinicians in this Medicare group

NPI 1215425905 (425) 391-3343

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 98133 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

$63.67 typical visit price

range $63.67 – $189.37

Typical copayment $15.91 (range $15.91 – $47.34)

Most-billed visit code 99202

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 3

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

DR. CARLY ANN COX AU.D.

Audiologist

10330 MERIDIAN AVE N STE 270
SEATTLE, WA 98133

King County (206) 668-7100

JOSEPH CHANG MD

Otolaryngology

10330 MERIDIAN AVE N STE 270
SEATTLE, WA 98133

King County (206) 668-7100

MS. CATHERINE LOUISE LEBLOND AUD

Audiologist

10330 MERIDIAN AVE N STE 270
SEATTLE, WA 98133

King County (206) 520-5000

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 Yoonjee Sim's NPI number?

The NPI number for Yoonjee Sim is 1104714955. It was assigned to this individual provider in the NPPES registry on June 27, 2025.

Where is Yoonjee Sim located?

Yoonjee Sim practices at 10330 Meridian Ave N Ste 270, Seattle, WA 98133. The listed phone number is (206) 668-7100.

What is Yoonjee Sim's specialty?

The primary specialty registered for this NPI is Audiologist with taxonomy code 231H00000X.

Is Yoonjee Sim enrolled in Medicare?

Yes. Yoonjee Sim is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Yoonjee Sim's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Yoonjee Sim reassigns Medicare benefits to 2 organizations: The Association Of University Physicians (Seattle, WA) and Hear Northwest PLLC (Issaquah, WA). Each 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 Yoonjee Sim's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Yoonjee Sim accept?

Health plans from Premera Blue Cross Blue Shield of Alaska and Providence Health Plan list Yoonjee Sim 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 Yoonjee Sim was last updated on September 3, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 57 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.