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MARISSA MING-YAN VALDEZ AU.D.
NPI 1447430483
Audiologist in Seattle, WA

Active since November 07, 2007
4800 SAND POINT WAY NE, M/S 6640, SEATTLE, WA 98105(206) 987-5173 Get Directions Write a Review

NPPES record last updated: February 28, 2018. Verified against the NPPES registry weekly; last sync: November 08, 2026.

About Marissa Ming-yan Valdez Au.d. NPPES

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

MARISSA MING-YAN VALDEZ AU.D. (NPI 1447430483) is an individual audiologist in Seattle, Washington, licensed in Washington (LD00004709) and active in the NPI registry since November 2007.

NPPES Registry Identity

NPI1447430483
Entity TypeIndividualFemale
Primary Taxonomy231H00000X
Provider Legal NameMARISSA MING-YAN VALDEZCredential: AU.D.
Location Address4800 SAND POINT WAY NE, M/S 6640Seattle, WA 98105-3901
Mailing Address4800 Sand Point Way Ne, M/s 6640Seattle, WA 98105-3901
Phone(206) 987-5173
Sole ProprietorNo
Enumeration DateNovember 7, 2007
Last NPPES UpdateFebruary 28, 2018
✔ NPI 1447430483 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 · LD00004709
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.
4800 SAND POINT WAY NE, Seattle, WA 98105
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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Marissa Ming-yan Valdez Au.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Medicare Billing Reassignment

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

Seattle Children's Hospital
Same address
Specialist
4800 SAND POINT WAY NE
Seattle, WA 98105
  • Reassigned Medicare billing, Washington enrollment
  • Medicare enrollment name: Seattle Childrens Hospital
  • 912 clinicians in this Medicare group
NPI 1003319500 (206) 987-2000

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

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.

NALINI MALARKKAN MD
Anesthesiology
4800 SAND POINT WAY NE
SEATTLE, WA 98105
King County (206) 987-2728
MS. LINDA E EBLEN MA
Speech-Language Pathologist
4800 SAND POINT WAY NE, MAIL STOP W-6839
SEATTLE, WA 98105
King County (206) 987-6164
DR. LESLIE ANN DERVAN MD
Pediatrics (Pediatric Critical Care Medicine)
4800 SAND POINT WAY NE, MB.10.620
SEATTLE, WA 98105
King County (206) 987-0293
DR. INDI TREHAN MD
Pediatrics (Pediatric Infectious Diseases)
4800 SAND POINT WAY NE
SEATTLE, WA 98105
King County (206) 987-2000
MS. JENNIFER PATANO CNP
Nurse Practitioner (Pediatrics)
4800 SAND POINT WAY NE, MS O.7.720
SEATTLE, WA 98105
King County (206) 987-8949
MRS. SUSAN L HOLTZCLAW ARNP
Nurse Practitioner (Family)
4800 SAND POINT WAY NE, MAILSTOP T-2108
SEATTLE, WA 98105
King County (206) 987-5691
SHENG ZHOU MD
Otolaryngology (Pediatric Otolaryngology)
4800 SAND POINT WAY NE
SEATTLE, WA 98105
King County (206) 987-2105
SEATTLE CHILDREN'S HOSPITAL
Specialist
4800 SAND POINT WAY NE
SEATTLE, WA 98105
King County (206) 987-2000

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 Marissa Valdez's NPI number?

The NPI number for Marissa Valdez is 1447430483. It was assigned to this individual provider in the NPPES registry on November 7, 2007.

Where is Marissa Valdez located?

Marissa Valdez practices at 4800 Sand Point Way NE M/S 6640, Seattle, WA 98105. The listed phone number is (206) 987-5173.

What is Marissa Valdez's specialty?

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

Is Marissa Valdez enrolled in Medicare?

Yes. Marissa Valdez is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Marissa Valdez's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Marissa Valdez reassigns Medicare benefits to Seattle Children's Hospital (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 Marissa Valdez's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Marissa Valdez was last updated on February 28, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 years 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.