Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

William Messer, MDPHD

Individual provider Infectious Disease Physician · NPI 1508085739

William Messer, MDPHD is registered under Infectious Disease in Portland, Oregon. Graduated from University of North Carolina at Chapel Hill School of Medicine in 2006, 20 years ago. Practices with University Professional Services, a 1,704-clinician group and accepts Medicare assignment. Licensed in North Carolina and Oregon.

Years since qualifying
20
Trained at
University of North Carolina at Chapel Hill School of Medicine
Licensed in
NC, OR
In the registry since
2007
Specialties on file
2
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Practice location Address checks out

3181 SW Sam Jackson Park Rd L457
Portland, OR 97239-3011 Not confirmed with CMS for 13 years — call before visiting
Phone: (503) 494-7735
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Infectious Disease Physician (primary) Taxonomy 207RI0200X · Licence MD160501 (OR)
Infectious Disease Physician Taxonomy 207RI0200X · Licence 2010-01245 (NC)

Record details

NPI number1508085739
Entity typeIndividual (Type 1)
GenderMale
Credentials MDPHD
Sole proprietorYes
NPI enumeratedApril 25, 2007
Last updated in NPPESNovember 6, 2012

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINFECTIOUS DISEASE
Medical schoolUNIVERSITY OF NORTH CAROLINA AT CHAPEL HILL SCHOOL OF MEDICINE
Graduated 2006 (20 years in practice)
Group practice University Professional Services — 1704 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients32
Services billed 79 a service is one billed item, such as a visit, a test or a procedure
Average patient age67

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

  • Hillsboro Medical Center Hospital · Hillsboro, OR
  • Ohsu Hospital And Clinics Hospital · Portland, OR

Colleagues at University Professional Services

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1704 clinicians in the practice; 12 are shown here.

Other providers in Portland