Annelise Yoo Mah-Som, MD, PHD
Clinical Genetics (M.D.) Physician · Seattle, WA
Annelise Yoo Mah-Som, MD, PHD is a clinical genetics (m.d.) physician with a practice address in Seattle, Washington, and NPI 1003443920, issued on Mar 23, 2020. Check the license (Washington MD61509328, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- Annelise Yoo Mah-Som
- Credential
- MD, PHD
- Primary taxonomy
- Clinical Genetics (M.D.) Physician 207SG0201X
- License number
- MD61509328 WA
Self-reported in NPPES; status is on the state search - Practice location
- 1959 NE Pacific St, Seattle, WA 98195
- Phone
- (206) 520-5000
- Enumerated
- Mar 23, 2020
- Record last updated
- Jan 7, 2025
- Medicare enrollment
- Enrolled (PECOS I20241217002741); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest clinical genetics (m.d.) physician records → All 33 in Washington → Look up another NPI →
Also registered at 1959 NE Pacific St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Mohamed AbdelmotlebDiagnostic Radiology Physician1134892656
Verify Annelise Yoo Mah-Som in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD61509328Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
81% fewer Medicare Part D claims than the average clinical genetics (m.d.) physician in 2024
11 Medicare Part D claims, against an average of 59 among the 193 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $167.83
1 payment: food and beverage; the largest payer was Medtronic, Inc. The 306 providers of this specialty with any payment received $12,333.04 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- The Association OF University PhysiciansSeattle, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Annelise Yoo Mah-Som among 33 clinical genetics (m.d.) physician records in Washington
Annelise Yoo Mah-Som, MD, PHD is one of 33 clinical genetics (m.d.) physician records with a practice address in Washington. 52% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2020, is newer than 94% of them.
- NPI issued2020 · 94% of these records are older, 3% newer
- In a Medicare fileYes · 52% of these records are
- In the CMS Doctors and Clinicians fileYes · 42% of these records are
- Graduated2020 · median 1997 among the 14 with a school on file
- Record last updated2025 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207SG0201X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Clinical Genetics (M.D.) Physician providers in Washington
There are 33 clinical genetics (m.d.) physician records in Washington.
All 33 in Washington → Every provider in Seattle → Clinical Genetics (M.D.) Physician nationwide →
The 8 clinical genetics (m.d.) physician records with the nearest ZIP codes
- Ruxandra Bachmann-Gagescu, MDSeattle, WA 981951336303031
- Andrew Dervan, M.D.Seattle, WA 981951851690614
- Robert Hershberg, MD PHDSeattle, WA 981951346444767
- Marshall HorwitzSeattle, WA 981951013007970
- Gail Jarvik, M.D., PH.D.Seattle, WA 981951801971619
- Prasit Phowthongkum, M.D.Seattle, WA 981951235494105
- Wendy RaskindSeattle, WA 981951083799803
- Andrew Stergachis, M.D., PH.D.Seattle, WA 981951639550635
Common questions
What is Annelise Yoo Mah-Som, MD, PHD's NPI number?
Annelise Yoo Mah-Som, MD, PHD's National Provider Identifier (NPI) is 1003443920, issued on Mar 23, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Annelise Yoo Mah-Som, MD, PHD located?
The NPPES record lists a practice address at 1959 NE Pacific St, Seattle, WA, 98195. Phone: (206) 520-5000. Providers update this record themselves, so call before visiting.
How can I verify Annelise Yoo Mah-Som, MD, PHD's license?
NPPES lists Washington license number MD61509328, as entered by the provider. Search the Washington Medical Commission at https://wahelms.my.site.com/s/license-search. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Annelise Yoo Mah-Som, MD, PHD prescribe under Medicare Part D?
In 2024, Annelise Yoo Mah-Som, MD, PHD had 11 Medicare Part D claims; the average among clinical genetics (m.d.) physician prescribers was 59. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.