ANNELISE YOO MAH-SOM MD, PHD
NPI 1003443920
Medical Genetics - Clinical Genetics (M.D.) in Seattle, WA

Active since March 23, 2020PECOS EnrolledAccepts Medicare Assignment
1959 NE PACIFIC ST, SEATTLE, WA 98195(206) 520-5000 Get Directions Write a Review

NPPES record last updated: January 7, 2025. Verified against the NPPES registry weekly; last sync: July 26, 2026.

Record update history: Jan 7, 2025, Aug 4, 2020, Mar 23, 2020 (3 updates tracked since 2020).

About Annelise Yoo Mah-som Md, Phd NPPES

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

ANNELISE YOO MAH-SOM MD, PHD (NPI 1003443920) is an individual clinical genetics (m.d.) provider in Seattle, Washington, licensed in Washington (MD61509328) and active in the NPI registry since March 2020. She is enrolled in Medicare PECOS and is a graduate of Other (2020).

NPPES Registry Identity

NPI1003443920
Entity TypeIndividualFemale
Primary Taxonomy207SG0201X
Provider Legal NameANNELISE YOO MAH-SOMCredential: MD, PHD
Location Address1959 NE PACIFIC STSeattle, WA 98195-6110
Mailing AddressPo Box 50095Seattle, WA 98145-5095 · (206) 520-5700
Sole ProprietorNo
Medical School CMSOtherGraduated 2020
Enumeration DateMarch 23, 2020
Last NPPES UpdateJanuary 7, 20253 updates tracked since enumeration
NPPES CertifiedJanuary 7, 2025
NPI 1003443920 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

Primary SpecialtyMedical Genetics · Clinical Genetics (M.D.)Allopathic & Osteopathic Physicians
Taxonomy Code207SG0201X
License Licensed in WA · MD61509328
Definition

A clinical geneticist demonstrates competence in providing comprehensive diagnostic, management and counseling services for genetic disorders.

Also ListedInternal MedicineTaxonomy 207R00000X · License MD61509328 (WA)
1959 NE PACIFIC ST, Seattle, WA 98195

Other Names 1

Former Name (1)Annelise Yoo Mah

Accepted Insurance

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

Enrolled in Medicare and accepts Medicare assignment

Annelise Yoo Mah-som Md, Phd 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 ID2466989322
PECOS Enrollment IDI20241217002741
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.

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.

Pharmacist (Pharmacist Clinician (PhC)/ Clinical Pharmacy Specialist)
1959 NE PACIFIC ST
SEATTLE, WA 98195
Obstetrics & Gynecology (Maternal & Fetal Medicine)
1959 NE PACIFIC ST, 3RD FLOOR SW 350
SEATTLE, WA 98195
Occupational Therapist
1959 NE PACIFIC ST, MAILBOX 356490
SEATTLE, WA 98195
Ophthalmology
1959 NE PACIFIC ST, BOX 365485
SEATTLE, WA 98195
Anesthesiology
1959 NE PACIFIC ST
SEATTLE, WA 98195
Pharmacist (Pharmacist Clinician (PhC)/ Clinical Pharmacy Specialist)
1959 NE PACIFIC ST, BOX 356015
SEATTLE, WA 98195
Pathology (Anatomic Pathology & Clinical Pathology)
1959 NE PACIFIC ST, BOX 356100
SEATTLE, WA 98195
Hospitalist
1959 NE PACIFIC ST
SEATTLE, WA 98195

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 Annelise Mah-som's NPI number?

The NPI number for Annelise Mah-som is 1003443920. It was assigned to this individual provider in the NPPES registry on March 23, 2020. The provider is also known as Annelise Yoo Mah.

Where is Annelise Mah-som located?

Annelise Mah-som practices at 1959 NE Pacific St, Seattle, WA 98195. The listed phone number is (206) 520-5000.

What is Annelise Mah-som's specialty?

The primary specialty registered for this NPI is Medical Genetics, specializing in Clinical Genetics (M.D.), with taxonomy code 207SG0201X.

Is Annelise Mah-som enrolled in Medicare?

Yes. Annelise Mah-som 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.

What insurance does Annelise Mah-som accept?

Health plans from Premera Blue Cross Blue Shield of Alaska and Providence Health Plan list Annelise Mah-som 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 Annelise Mah-som was last updated on January 7, 2025. NPI Profile syncs with the weekly NPPES data releases published by CMS.