NPPES file of Aug 9, 2026

Theresa Chan, M.D.

Family Medicine Physician · Medford, OR

Theresa Chan, M.D. is a family medicine physician with a practice address in Medford, Oregon, and NPI 1043254576, issued on Jun 15, 2006. Check the license (Oregon MD152431, as entered in NPPES) on the Oregon Medical Board; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1043254576
Name
Theresa Chan
Credential
M.D.
Primary taxonomy
Family Medicine Physician 207Q00000X
License numbers
MD152431 OR
A83176 CA
Self-reported in NPPES; status is on the state search
Practice location
2825 E Barnett Road, Medford, OR 97504
Phone
(541) 789-7000
Enumerated
Jun 15, 2006
Record last updated
Jun 23, 2011 (not updated in 15 years: call before relying on the address or phone)
Medicaid ID
00A831760 CA
Medicare enrollment
Enrolled (PECOS I20050211000202); accepts Medicare assignment
Medical or professional school
Stanford University School Of Medicine, 2001
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest family medicine physician records → All 2,847 in Oregon → Look up another NPI →

Also registered at 2825 E Barnett Road

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Mudassir Akram, MDHospitalist Physician1164696969
  2. Kusum Asudani, MDHospitalist Physician1104852680
  3. Erin Brender, M.D.Internal Medicine Physician1588709521
  4. Andrei Chirpac, MDHospitalist Physician1700227006
  5. Jon Gell, MDInternal Medicine Physician1982694873
  6. Minal Jaju, MDHospitalist Physician1427491620

Verify Theresa Chan in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersOregon Medical Board
    Search for license MD152431    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Oregon license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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98% fewer Medicare Part D claims than the average family medicine physician in 2024

65 Medicare Part D claims for 54 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D.

  1. Theresa Chan65
  2. Specialty average3,544

Most prescribed

  1. Cephalexin11 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: $42.10

2 payments; by number, the most common kind was food and beverage; the largest payer was Pfizer Inc. The 55,478 providers of this specialty with any payment received $902.55 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Theresa Chan$42.10
  2. Specialty average$902.55

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

  1. Sutter Bay Medical FoundationSan Mateo, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Theresa Chan among 2,847 family medicine physician records in Oregon

Theresa Chan, M.D. is one of 2,847 family medicine physician records with a practice address in Oregon. 75% 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 9% of them.

  • NPI issued2006 · 9% of these records are older, 53% newer
  • In a Medicare fileYes · 75% of these records are
  • In the CMS Doctors and Clinicians fileYes · 59% of these records are
  • Graduated2001 · median 2009 among the 1,671 with a school on file
  • Record last updated2011 · 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 Oregon practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

93 family medicine physician records list a practice address in Medford

They are 93 of the 4,542 NPPES records with a practice address in Medford, and 2,847 family medicine physician records in Oregon.

All 2,847 in Oregon → Every provider in Medford → Family Medicine Physician nationwide →

The 8 family medicine physician records with the nearest ZIP codes

  1. Martin Albert, M.D.Medford, OR 975041275501215
  2. Robert Anderson, DOMedford, OR 975041578556155
  3. Jean Bieraugel, MDMedford, OR 975041760489181
  4. Beverly Copeland, MDMedford, OR 975041285631655
  5. Phyllis Dunckel, MDMedford, OR 975041003813627
  6. Robert Eckert, MDMedford, OR 975041942207592
  7. Karen Kahn, MDMedford, OR 975041508865015
  8. Paul Matz, MDMedford, OR 975041073510426

Common questions

What is Theresa Chan, M.D.'s NPI number?

Theresa Chan, M.D.'s National Provider Identifier (NPI) is 1043254576, issued on Jun 15, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Theresa Chan, M.D. located?

The NPPES record lists a practice address at 2825 E Barnett Road, Medford, OR, 97504. Phone: (541) 789-7000. Providers update this record themselves, so call before visiting.

How can I verify Theresa Chan, M.D.'s license?

NPPES lists Oregon license number MD152431, 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 Theresa Chan, M.D. prescribe under Medicare Part D?

In 2024, Theresa Chan, M.D. had 65 Medicare Part D claims for 54 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.