Adam Williams, M.D.
Allergy & Immunology Physician · Bend, OR
Adam Williams, M.D. is an allergy & immunology physician with a practice address in Bend, Oregon, and NPI 1265433445, issued on Aug 10, 2005. Check the license (Oregon MD28200, as entered in NPPES) on the Oregon Medical Board; the Medicare figures below come from public CMS files.
- Name
- Adam Williams
- Credential
- M.D.
- Primary taxonomy
- Allergy & Immunology Physician 207K00000X
- License numbers
- MD28200 OR
A75129 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1501 NE Medical Center Dr, Bend, OR 97701
- Phone
- (541) 382-2811
- Enumerated
- Aug 10, 2005
- Record last updated
- Mar 29, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicaid ID
- 218618 OR
- Medicare enrollment
- Enrolled (PECOS I20080710000664); accepts Medicare assignment
- Medical or professional school
- Oregon Health Sciences University School Of Medicine, 1999
- Entity
- Type 1 · individual
8 nearest allergy & immunology physician records → All 43 in Oregon → Look up another NPI →
Also registered at 1501 NE Medical Center Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Adam Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOregon Medical Board
Search for license MD28200Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
66% more Medicare Part D claims than the average allergy & immunology physician in 2024
1,229 Medicare Part D claims for 233 beneficiaries, against an average of 741 among the 2,899 providers of this specialty who prescribed in Part D. Brand-name drugs were 42% of claims.
Most prescribed
- Ipratropium Bromide172 claims
- Azelastine Hcl147 claims
- Montelukast Sodium144 claims
- Trelegy Ellipta74 claims
- Albuterol Sulfate Hfa68 claims
- Breo Ellipta46 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: $34,521.64
129 payments; by number, the most common kind was food and beverage; the largest payer was Genentech USA, Inc. The 2,496 providers of this specialty with any payment received $8,321.81 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
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
- Bend Memorial Clinic PCBend, OR
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Adam Williams among 43 allergy & immunology physician records in Oregon
Adam Williams, M.D. is one of 43 allergy & immunology physician records with a practice address in Oregon. 70% 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, 81% newer
- In a Medicare fileYes · 70% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated1999 · median 2005 among the 23 with a school on file
- Record last updated2021 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207K00000X and a Oregon practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Allergy & Immunology Physician providers in Oregon
There are 43 allergy & immunology physician records in Oregon.
All 43 in Oregon → Every provider in Bend → Allergy & Immunology Physician nationwide →
The 8 allergy & immunology physician records with the nearest ZIP codes
- Ryan Israelsen, M.D.Medford, OR 975041487910766
- Richard Buck, MDEugene, OR 974051730166828
- Jason Friesen, MDEugene, OR 974011043379860
- Kraig Jacobson, M.D.Eugene, OR 974011255323515
- Sarah Kehl, M.D.Eugene, OR 974011992835367
- Maxwell Li, M.D.Eugene, OR 974011114284015
- Lisa Wheatley, MDEugene, OR 974011982682811
- Laura Metzger, M.D.Salem, OR 973031770521833
Common questions
What is Adam Williams, M.D.'s NPI number?
Adam Williams, M.D.'s National Provider Identifier (NPI) is 1265433445, issued on Aug 10, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Adam Williams, M.D. located?
The NPPES record lists a practice address at 1501 NE Medical Center Dr, Bend, OR, 97701. Phone: (541) 382-2811. Providers update this record themselves, so call before visiting.
How can I verify Adam Williams, M.D.'s license?
NPPES lists Oregon license number MD28200, 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 Adam Williams, M.D. prescribe under Medicare Part D?
In 2024, Adam Williams, M.D. had 1,229 Medicare Part D claims for 233 beneficiaries; the average among allergy & immunology physician prescribers was 741. 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.