William Messer, M.D. PH.D.
Infectious Disease Physician · Portland, OR
William Messer, M.D. PH.D. is an infectious disease physician with a practice address in Portland, Oregon, and NPI 1508085739, issued on Apr 25, 2007. Check the license (Oregon MD160501, as entered in NPPES) on the Oregon Medical Board; the Medicare figures below come from public CMS files.
- Name
- William Messer
- Credential
- M.D. PH.D.
- Primary taxonomy
- Infectious Disease Physician 207RI0200X
- License numbers
- MD160501 OR
2010-01245 NC
Self-reported in NPPES; status is on the state search - Practice location
- 3181 SW Sam Jackson Park RD, Portland, OR 97239
- Phone
- (503) 494-7735
- Enumerated
- Apr 25, 2007
- Record last updated
- Nov 6, 2012 (not updated in 14 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20121221000084); accepts Medicare assignment
- Medical or professional school
- University Of North Carolina At Chapel Hill School Of Medicine, 2006
- Entity
- Type 1 · individual
8 nearest infectious disease physician records → All 127 in Oregon → Look up another NPI →
Also registered at 3181 SW Sam Jackson Park RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Alex AamodtCritical Care Medicine Registered Nurse1154257590
- Jefferson Abaricia, MD, PHDStudent in an Organized Health Care Education/Training Program1073215711
- Kenneth Abbey, MDAnesthesiology Physician1588779342
- Matthew Abbott, PA-CMedical Physician Assistant1154738003
- Ayah Abdelsalam Megahed, MD, MSCVascular & Interventional Radiology Physician1023503596
- Obada Abdulrazzak, MDStudent in an Organized Health Care Education/Training Program1598567430
Verify William Messer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOregon Medical Board
Search for license MD160501Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The MIPS final score for 2023 (Medicare payment program): 97.8 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
Bills Medicare through 2 group practices
- Tuality Medical Group LLCHillsboro, OR
- University Professional ServicesBeaverton, OR
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Messer among 127 infectious disease physician records in Oregon
William Messer, M.D. PH.D. is one of 127 infectious disease physician records with a practice address in Oregon. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 46% of them.
- NPI issued2007 · 46% of these records are older, 42% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2006 · median 2007 among the 88 with a school on file
- Record last updated2012 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RI0200X and a Oregon practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Infectious Disease Physician providers in Oregon
There are 127 infectious disease physician records in Oregon.
All 127 in Oregon → Every provider in Portland → Infectious Disease Physician nationwide →
The 8 infectious disease physician records with the nearest ZIP codes
- Richard Bryant, MDPortland, OR 972391285641100
- Sunwen Chou, MDPortland, OR 972391568477073
- Graeme Forrest, M.D.Portland, OR 972391730139114
- Morgan Hakki, MDPortland, OR 972391255441556
- Kieren MarrPortland, OR 972391104916055
- George Mejicano, MDPortland, OR 972391083680979
- Melissa Murphy, MDPortland, OR 972391497763916
- Christopher Pfeiffer, M.D., M.H.S.Portland, OR 972391760440044
Common questions
What is William Messer, M.D. PH.D.'s NPI number?
William Messer, M.D. PH.D.'s National Provider Identifier (NPI) is 1508085739, issued on Apr 25, 2007. An NPI identifies a provider in billing; it is not a license.
Where is William Messer, M.D. PH.D. located?
The NPPES record lists a practice address at 3181 SW Sam Jackson Park RD, Portland, OR, 97239. Phone: (503) 494-7735. Providers update this record themselves, so call before visiting.
How can I verify William Messer, M.D. PH.D.'s license?
NPPES lists Oregon license number MD160501, 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.
What is William Messer, M.D. PH.D.'s MIPS final score?
The 2023 MIPS final score is 97.8 of 100. 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.