Helen H. Xiao-Li, MD
Radiation Oncology Physician · Sequim, WA
Helen H. Xiao-Li, MD is a radiation oncology physician with a practice address in Sequim, Washington, and NPI 1538157946, issued on Oct 10, 2005. Check the license (Washington MD61619512, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- Helen H. Xiao-Li
- Credential
- MD
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License numbers
- MD61619512 WA
224634-3 NY
Self-reported in NPPES; status is on the state search - Practice location
- 844 N 5TH Ave, Sequim, WA 98382
- Phone
- (360) 683-9895
- Enumerated
- Oct 10, 2005
- Record last updated
- Nov 11, 2024
- Fax
- (360) 685-8256
- Medicare enrollment
- Enrolled (PECOS I20241022003279); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 198 in Washington → Look up another NPI →
Also registered at 844 N 5TH Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Charene Alderman, ARNPNurse Practitioner1013952738
- Donna Cameron, RNRegistered Nurse1932065075
- Lesley Cruz, DNP, ARNPNurse Practitioner1356047518
- Susan Feeney, MDRadiation Oncology Physician1750321469
- Thomas Fitzgerald, MD PH DHematology & Oncology Physician1336134766
- William Harrer, M.D.Medical Oncology Physician1972584217
Verify Helen H. Xiao-Li in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD61619512Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
58% fewer Medicare Part D claims than the average radiation oncology physician in 2024
56 Medicare Part D claims for 37 beneficiaries, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D. Brand-name drugs were 23% of claims.
Most prescribed
- Tamsulosin Hcl23 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).
Helen H. Xiao-Li among 198 radiation oncology physician records in Washington
Helen H. Xiao-Li, MD is one of 198 radiation oncology physician records with a practice address in Washington. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 90% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated1987 · median 2006 among the 141 with a school on file
- Record last updated2024 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0001X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Radiation Oncology Physician providers in Washington
There are 198 radiation oncology physician records in Washington.
All 198 in Washington → Every provider in Sequim → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- Susan Feeney, MDSequim, WA 983821750321469
- Lindsay JensenSequim, WA 983821649601386
- Marie Taylor, MDSequim, WA 983821932127636
- Thomas Mullen, MD, PHDSilverdale, WA 983831053673202
- Robyn Vera, DOSilverdale, WA 983831033370705
- Zachary Oaks, MDPuyallup, WA 983731457841157
- Kevin Sanders, MDPuyallup, WA 983731376554154
- Nathan Bittner, MDPuyallup, WA 983721609989714
Common questions
What is Helen H. Xiao-Li, MD's NPI number?
Helen H. Xiao-Li, MD's National Provider Identifier (NPI) is 1538157946, issued on Oct 10, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Helen H. Xiao-Li, MD located?
The NPPES record lists a practice address at 844 N 5TH Ave, Sequim, WA, 98382. Phone: (360) 683-9895. Providers update this record themselves, so call before visiting.
How can I verify Helen H. Xiao-Li, MD's license?
NPPES lists Washington license number MD61619512, 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 Helen H. Xiao-Li, MD prescribe under Medicare Part D?
In 2024, Helen H. Xiao-Li, MD had 56 Medicare Part D claims for 37 beneficiaries; the average among radiation oncology physician prescribers was 134. 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.