Theresa Mah, DO
Dermatology Physician · Vancouver, WA
Theresa Mah, DO is a dermatology physician with a practice address in Vancouver, Washington, and NPI 1700991148, issued on Aug 19, 2006. Check the license (Washington OP00002137, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- Theresa Mah
- Credential
- DO
- Primary taxonomy
- Dermatology Physician 207N00000X
- License number
- OP00002137 WA
Self-reported in NPPES; status is on the state search - Practice location
- 700 NE 87TH Ave, Vancouver, WA 98664
- Phone
- (360) 254-1240
- Enumerated
- Aug 19, 2006
- Record last updated
- Nov 23, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (360) 397-3128
- Medicaid ID
- 8462038 WA
- Medicare enrollment
- Enrolled (PECOS I20061023000180); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest dermatology physician records → All 384 in Washington → Look up another NPI →
Also registered at 700 NE 87TH Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Kathleen Adkison, DNP-FNPFamily Nurse Practitioner1043160500
- Kirstie Anderson, D.P.T.Physical Therapist1023486396
- Lauren Andronici, CNMAdvanced Practice Midwife1356396709
- Susan Arnold-Edgar, PA-CPhysician Assistant1023057817
- Vincent Au, M.D.Internal Medicine Physician1104112051
- Jennifer Austin, MDPediatrics Physician1326087503
Verify Theresa Mah in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license OP00002137Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.0 times the Medicare Part D claims of the average dermatology physician in 2024
1,624 Medicare Part D claims for 593 beneficiaries, against an average of 797 among the 12,802 providers of this specialty who prescribed in Part D. Brand-name drugs were 6% of claims.
Most prescribed
- Ketoconazole293 claims
- Clobetasol Propionate121 claims
- Triamcinolone Acetonide107 claims
- Metronidazole102 claims
- Fluorouracil94 claims
- Ciclopirox93 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.
Bills Medicare through one group practice
- The Vancouver Clinic Inc PSVancouver, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Theresa Mah among 384 dermatology physician records in Washington
Theresa Mah, DO is one of 384 dermatology physician records with a practice address in Washington. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 8% of them.
- NPI issued2006 · 8% of these records are older, 55% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated2002 · median 2009 among the 275 with a school on file
- Record last updated2007 · 56% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207N00000X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Dermatology Physician providers in Washington
There are 384 dermatology physician records in Washington.
All 384 in Washington → Every provider in Vancouver → Dermatology Physician nationwide →
The 8 dermatology physician records with the nearest ZIP codes
- Joel Datloff, MDVancouver, WA 986641477581817
- Elizabeth Dawson, MDVancouver, WA 986641760676910
- Karen Vigeland, MDVancouver, WA 986641306874748
- Henrik Martens, MDVancouver, WA 986601922253319
- Basheer Badiei, M.D.Vancouver, WA 986841730207523
- Katherine Boyd, MDVancouver, WA 986841437319423
- Thomas Busick, M.D.Vancouver, WA 986841528241759
- Zheng Qian, MDVancouver, WA 986841114950896
Common questions
What is Theresa Mah, DO's NPI number?
Theresa Mah, DO's National Provider Identifier (NPI) is 1700991148, issued on Aug 19, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Theresa Mah, DO located?
The NPPES record lists a practice address at 700 NE 87TH Ave, Vancouver, WA, 98664. Phone: (360) 254-1240. Providers update this record themselves, so call before visiting.
How can I verify Theresa Mah, DO's license?
NPPES lists Washington license number OP00002137, 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 Theresa Mah, DO prescribe under Medicare Part D?
In 2024, Theresa Mah, DO had 1,624 Medicare Part D claims for 593 beneficiaries; the average among dermatology physician prescribers was 797. 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.