Cynthia A. Chan, MD
Internal Medicine Physician · Clackamas, OR
Cynthia A. Chan, MD is an internal medicine physician with a practice address in Clackamas, Oregon, and NPI 1912090895, issued on Oct 2, 2006. Check the license (Oregon MD26857, as entered in NPPES) on the Oregon Medical Board; the Medicare figures below come from public CMS files.
- Name
- Cynthia A. Chan
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- MD26857 OR
Self-reported in NPPES; status is on the state search - Practice location
- 10100 SE Sunnyside RD, Clackamas, OR 97015
- Phone
- (800) 813-2000
- Enumerated
- Oct 2, 2006
- Record last updated
- Mar 4, 2026
- Medicaid ID
- 240131 OR
- Medicare enrollment
- Enrolled (PECOS I20070507000435); accepts Medicare assignment
- Medical or professional school
- Ponce School Of Medicine, 2000
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,116 in Oregon → Look up another NPI →
Also registered at 10100 SE Sunnyside RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Allyson AdamsFamily Medicine Physician1043899537
- Turgut Alagoz, MDGynecologic Oncology Physician1336297266
- Cesar Alberte-Lista, MDCardiovascular Disease Physician1144297789
- Rachel Algenio, MDObstetrics & Gynecology Physician1083720395
- Michael Armstrong, DOInternal Medicine Physician1740742337
- Dana Bailey, PTPhysical Therapist1821109232
Verify Cynthia A. Chan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOregon Medical Board
Search for license MD26857Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
95% fewer Medicare Part D claims than the average internal medicine physician in 2024
159 Medicare Part D claims for 109 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 25% of claims.
Most prescribed
- Albuterol Sulfate Hfa12 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 2 group practices
- Crm Physicians LLCVancouver, WA
- Kaiser Foundation Health Plan OF The NorthwestClackamas, OR
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Cynthia A. Chan among 2,116 internal medicine physician records in Oregon
Cynthia A. Chan, MD is one of 2,116 internal medicine physician records with a practice address in Oregon. 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 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 54% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated2000 · median 2008 among the 1,232 with a school on file
- Record last updated2026 · 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 207R00000X and a Oregon practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
101 internal medicine physician records list a practice address in Clackamas
They are 101 of the 2,098 NPPES records with a practice address in Clackamas, and 2,116 internal medicine physician records in Oregon.
All 2,116 in Oregon → Every provider in Clackamas → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Lisa Ashcraft, MDClackamas, OR 970151801851746
- Kirthika Balakrishnan, MDClackamas, OR 970151881655256
- Stephanie Cha, MDClackamas, OR 970151902832371
- Alla Comardelle, M.D.Clackamas, OR 970151558397034
- Gregory Garcia, MDClackamas, OR 970151922036219
- Randall Gore, M.D.Clackamas, OR 970151639163447
- Gene Hong, M.D.Clackamas, OR 970151417905506
- Chieko Misaki, M.D.Clackamas, OR 970151225093172
Common questions
What is Cynthia A. Chan, MD's NPI number?
Cynthia A. Chan, MD's National Provider Identifier (NPI) is 1912090895, issued on Oct 2, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Cynthia A. Chan, MD located?
The NPPES record lists a practice address at 10100 SE Sunnyside RD, Clackamas, OR, 97015. Phone: (800) 813-2000. Providers update this record themselves, so call before visiting.
How can I verify Cynthia A. Chan, MD's license?
NPPES lists Oregon license number MD26857, as entered by the provider. Search the Oregon Medical Board at https://www.oregon.gov/OMB/Pages/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Cynthia A. Chan, MD prescribe under Medicare Part D?
In 2024, Cynthia A. Chan, MD had 159 Medicare Part D claims for 109 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.