Stephen Chihoon Woo, D.O.
Family Medicine Physician · Sequim, WA
Stephen Chihoon Woo, D.O. is a family medicine physician with a practice address in Sequim, Washington, and NPI 1811256449, issued on May 16, 2012. Check the license (Washington OP60527165, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- Stephen Chihoon Woo
- Credential
- D.O.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- OP60527165 WA
Self-reported in NPPES; status is on the state search - Practice location
- 800 N 5TH Ave Ste 101, Sequim, WA 98382
- Phone
- (360) 565-0999
- Enumerated
- May 16, 2012
- Record last updated
- May 23, 2022
- Fax
- (360) 582-4221
- Medicare enrollment
- Enrolled (PECOS I20150828002077); accepts Medicare assignment
- Medical or professional school
- Michigan State University College Of Osteopathic Medicine, 2012
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 5,534 in Washington → Look up another NPI →
Also registered at 800 N 5TH Ave Ste 101
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Megan Bland, DNP, FNP-CNurse Practitioner1083504393
- Nicholas Cordeiro, ARNPNurse Practitioner1952994816
- Eric Hempel, D.O.Family Medicine Physician1578784336
- Andrew Lazos, PA-CPhysician Assistant1043941289
- Valerie Lodge, FNPNurse Practitioner1609123298
- Thomas Michels, MDFamily Medicine Physician1891765152
Verify Stephen Chihoon Woo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license OP60527165Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.1 times the Medicare Part D claims of the average family medicine physician in 2024
7,397 Medicare Part D claims for 608 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 239 claims were for opioids.
Most prescribed
- Atorvastatin Calcium527 claims
- Levothyroxine Sodium329 claims
- Losartan Potassium301 claims
- Lisinopril260 claims
- Metoprolol Succinate252 claims
- Amlodipine Besylate237 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
- Olympic Medical PhysiciansSequim, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Stephen Chihoon Woo among 5,534 family medicine physician records in Washington
Stephen Chihoon Woo, D.O. is one of 5,534 family medicine physician records with a practice address in Washington. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2012, is newer than 64% of them.
- NPI issued2012 · 64% of these records are older, 33% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2012 · median 2009 among the 3,294 with a school on file
- Record last updated2022 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
26 family medicine physician records list a practice address in Sequim
They are 26 of the 530 NPPES records with a practice address in Sequim, and 5,534 family medicine physician records in Washington.
All 5,534 in Washington → Every provider in Sequim → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Allen Berry, M.D.Sequim, WA 983821972557700
- Michael Crim, MDSequim, WA 983821063471621
- Paul Cunningham, MDSequim, WA 983821962477935
- Kathleen Farrell, D.O.Sequim, WA 983821285635086
- Timothy Guthrie, MDSequim, WA 983821710975990
- Thomas Michels, MDSequim, WA 983821891765152
- Clarisse Noel, M.D.Sequim, WA 983821285638635
- Jerome Oakes, M.D.Sequim, WA 983821245263755
Common questions
What is Stephen Chihoon Woo, D.O.'s NPI number?
Stephen Chihoon Woo, D.O.'s National Provider Identifier (NPI) is 1811256449, issued on May 16, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Stephen Chihoon Woo, D.O. located?
The NPPES record lists a practice address at 800 N 5TH Ave Ste 101, Sequim, WA, 98382. Phone: (360) 565-0999. Providers update this record themselves, so call before visiting.
How can I verify Stephen Chihoon Woo, D.O.'s license?
NPPES lists Washington license number OP60527165, 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 Stephen Chihoon Woo, D.O. prescribe under Medicare Part D?
In 2024, Stephen Chihoon Woo, D.O. had 7,397 Medicare Part D claims for 608 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.