Alan Robertson Williams, M.D.
Emergency Medicine Physician · Clackamas, OR
Alan Robertson Williams, M.D. is an emergency medicine physician with a practice address in Clackamas, Oregon, and NPI 1174700215, issued on Jan 30, 2008. Check the license (Oregon MD158945, as entered in NPPES) on the Oregon Medical Board; the Medicare figures below come from public CMS files.
- Name
- Alan Robertson Williams
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- MD158945 OR
Self-reported in NPPES; status is on the state search - Practice location
- 10180 SE Sunnyside Road, Clackamas, OR 97015
- Phone
- (503) 652-2880
- Enumerated
- Jan 30, 2008
- Record last updated
- Sep 6, 2012 (not updated in 14 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,079 in Oregon → Look up another NPI →
Also registered at 10180 SE Sunnyside Road
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Alan Robertson Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOregon Medical Board
Search for license MD158945Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
6% more Medicare Part D claims than the average emergency medicine physician in 2024
239 Medicare Part D claims for 144 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 5% of claims. 43 claims were for opioids.
Most prescribed
- Ondansetron Odt35 claims
- Hydrocodone-Acetaminophen20 claims
- Cefdinir16 claims
- Doxycycline Hyclate13 claims
- Oxycodone-Acetaminophen12 claims
- Prednisone12 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 100 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Alan Robertson Williams among 1,079 emergency medicine physician records in Oregon
Alan Robertson Williams, M.D. is one of 1,079 emergency medicine physician records with a practice address in Oregon. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 51% of them.
- NPI issued2008 · 51% of these records are older, 45% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileNo · 52% of these records are
- Record last updated2012 · 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 207P00000X and a Oregon practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
94 emergency medicine physician records list a practice address in Clackamas
They are 94 of the 2,098 NPPES records with a practice address in Clackamas, and 1,079 emergency medicine physician records in Oregon.
All 1,079 in Oregon → Every provider in Clackamas → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Scott Bailey, M.D.Clackamas, OR 970151831159490
- Laurel Berge, M.D.Clackamas, OR 970151811944853
- Frederic Cirillo, MDClackamas, OR 970151417923665
- Josephine Colbach, M.D.Clackamas, OR 970151720091101
- Joseph Ehlers, MDClackamas, OR 970151629033329
- Briar Ertz-Berger, MDClackamas, OR 970151508866203
- Jennifer Larson, M.D.Happy Valley, OR 970151679512347
- Nicholas Leonard, M.D.Clackamas, OR 970151003929787
Common questions
What is Alan Robertson Williams, M.D.'s NPI number?
Alan Robertson Williams, M.D.'s National Provider Identifier (NPI) is 1174700215, issued on Jan 30, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Alan Robertson Williams, M.D. located?
The NPPES record lists a practice address at 10180 SE Sunnyside Road, Clackamas, OR, 97015. Phone: (503) 652-2880. Providers update this record themselves, so call before visiting.
How can I verify Alan Robertson Williams, M.D.'s license?
NPPES lists Oregon license number MD158945, 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 Alan Robertson Williams, M.D. prescribe under Medicare Part D?
In 2024, Alan Robertson Williams, M.D. had 239 Medicare Part D claims for 144 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Alan Robertson Williams, M.D.'s MIPS final score?
The 2023 MIPS final score is 100 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.