Dr. William B. Messer, MD, PhD
- Medicare services, 2024
- 50
- Medicare patients, 2024
- 32
- Part D claims, 2023
- 12
- MIPS score, 2024
- 99
- Hospital affiliations
- 3
- Practice address
- 2801 N Gantenbein Avenue, Portland, OR 97227
- Practice phone
- Call (503) 413-2200
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Messer's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. William B. Messer is an infectious disease specialist in Portland, Oregon
Dr. Messer practices at Legacy Emanuel Medical Center in Portland, Oregon, part of Legacy Health.
Dr. Messer's NPI, 1508085739, was assigned on April 25, 2007. Dr. Messer graduated from University of North Carolina at Chapel Hill School of Medicine in 2006. Dr. Messer holds Oregon license MD160501.
- NPI
- 1508085739NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0749437192
- NPI enumeration date
- April 25, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (503) 413-2200
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 46
- Medical school graduation
- 2006
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. William B. Messer practices at Legacy Emanuel Medical Center in Portland, Oregon
Dr. Messer's primary practice is Legacy Emanuel Medical Center, at 2801 N Gantenbein Avenue, Portland, OR 97227 in Multnomah County. The practice phone is (503) 413-2200.
- Legacy Emanuel Medical Center2801 N Gantenbein Avenue, Portland, OR 97227 · Multnomah CountyPhone(503) 413-2200
Source: Dmand AI Affiliation Data
Dr. William B. Messer is affiliated with 5 sites of care and 3 medical groups
Dr. Messer's primary practice is Legacy Emanuel Medical Center in Portland, Oregon, part of Legacy Health. Dr. Messer is also affiliated with OHSU Hospital. The medical group on file is Oregon Health & Science University (OHSU). Dmand AI also links Dr. Messer to 1 more hospital, 2 medical groups, 1 clinical lab and 1 therapy and rehab clinic, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. William B. Messer's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Messer practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Legacy Emanuel Medical Center | Available with a free account |
| +4 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Legacy Health and 6.2K+ hospitals, with verified contacts in the same login.
Dr. William B. Messer is one of 101 infectious disease specialists in Oregon
Infectious disease is Dr. Messer's primary specialty in the NPI Registry, under taxonomy code 207RI0200X. Dmand AI has Dr. Messer's licenses on file in 2 states: Oregon and North Carolina.
Specialties and state licenses
- Infectious disease, OregonPrimary
- North Carolina license
Infectious disease specialists near Dr. Messer
Counts of infectious disease specialists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. William B. Messer billed Medicare for 50 services in 2024
CMS data shows 50 Medicare services from Dr. Messer across 2 procedure codes in 2024, for 32 Medicare patients. Medicare paid $3,840 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Messer's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 272024: 5085%
Dr. Messer compared with the Oregon median for infectious disease specialists, 2024
- Dr. Messer
- Oregon median
- Medicare services
- 50vs 15568% below
- Medicare patients
- 32vs 9064% below
- Part D claims
- 12vs 11990% below
Medians across 103 infectious disease specialists in Oregon with Dmand AI profiles that report each measure.
Dr. Messer's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Messer?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Messer and other infectious disease specialists in Oregon.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. William B. Messer treated 32 Medicare patients in 2024, average age 67
CMS counts 32 Medicare patients who saw Dr. Messer in 2024. The largest group is 65 to 74, with 11 patients. 75% of them have high blood pressure, and 72% have high cholesterol. 53% are also on Medicaid. Their average risk score is 2.99, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Messer's median patient age at 72, with 31% women.
Dr. Messer's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Messer's Medicare patients by sex, 2024
- Women1547%
- Men1753%
Chronic conditions among Dr. Messer's Medicare patients, 2024
- High blood pressure75%
- High cholesterol72%
- Diabetes66%
- Chronic kidney disease53%
- Depression50%
- Mood disorders50%
- Arthritis44%
- Heart failure44%
Share of Medicare patients with each condition. A patient can have several.
Dr. Messer's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 72
Patient panel by sex, all payers
- Women31%
- Men69%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. William B. Messer wrote 12 Medicare Part D claims in 2023
In 2023, Dr. Messer wrote 12 Medicare Part D claims. They cover 1 drug, with $446 in total drug cost.
Dr. Messer's most prescribed drugs by claims, 2023
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
Dr. William B. Messer scored 99 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 99 out of 100 for Dr. Messer for performance year 2024, reported through an alternative payment model (APM). Dr. Messer accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Messer's MIPS scores, performance year 2024
- 99of 100Final score
- 84.3of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. William B. Messer received $22 in industry payments in 2017
CMS Open Payments shows 1 general payment to Dr. Messer from 1 drug or device company in 2017. Food and beverage make up the largest share, 100% of the total. Allergan Inc. paid the most, $22.
Companies that paid Dr. Messer the most, 2017 to 2017
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. William B. Messer graduated from University of North Carolina at Chapel Hill School of Medicine
Dr. Messer graduated from University of North Carolina at Chapel Hill School of Medicine in 2006.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. William B. Messer's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. William B. Messer
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. William B. Messer's NPI number?
Dr. William B. Messer's NPI number is 1508085739. It was assigned on April 25, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. William B. Messer?
Dr. William B. Messer is an infectious disease specialist in Portland, Oregon. The primary specialty in the NPI Registry is Infectious Disease Physician (taxonomy code 207RI0200X).
Where does Dr. William B. Messer practice?
Dr. Messer practices at 2801 N Gantenbein Avenue, Portland, OR 97227. Dr. Messer's primary practice is Legacy Emanuel Medical Center in Portland, Oregon, part of Legacy Health. Dmand AI also links Dr. Messer to 1 hospital, 2 medical groups, 1 clinical lab and 1 therapy and rehab clinic.
What is Dr. William B. Messer's office phone number?
The practice phone on file for Dr. Messer is (503) 413-2200.
What is Dr. William B. Messer's medical license number?
Dr. Messer holds Oregon license MD160501, one of the licenses on file in 2 states.
Which states has Dr. William B. Messer been licensed in?
Dmand AI has state licenses on file for Dr. Messer in Oregon and North Carolina.
Which hospitals is Dr. William B. Messer affiliated with?
Dr. Messer practices at Legacy Emanuel Medical Center in Portland, Oregon. Dr. Messer is also affiliated with OHSU Hospital. Dmand AI links Dr. Messer to 1 more hospital.
What medical group is Dr. William B. Messer part of?
Dr. Messer is linked to Oregon Health & Science University (OHSU). Dmand AI links Dr. Messer to 2 more medical groups.
Does Dr. William B. Messer accept Medicare?
Yes. CMS data shows Dr. Messer billed Medicare for 50 services in 2024, and Dr. Messer accepts Medicare assignment.
What is Dr. William B. Messer's MIPS score?
Dr. Messer's MIPS final score for performance year 2024 is 99 out of 100, reported through an alternative payment model (APM).
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How many Medicare patients does Dr. William B. Messer see?
CMS counts 32 Medicare patients who saw Dr. Messer in 2024, with an average age of 67.
What services does Dr. William B. Messer bill to Medicare?
In 2024, Dr. Messer's most billed Medicare services were hospital inpatient care (99232) and hospital inpatient care (99222).
Where did Dr. William B. Messer go to medical school?
Dr. Messer graduated from University of North Carolina at Chapel Hill School of Medicine in 2006.
What drugs does Dr. William B. Messer prescribe most?
In 2023 Medicare Part D data, Dr. Messer's most prescribed drugs by claims were Ceftriaxone.
Has Dr. William B. Messer received payments from drug or device companies?
CMS Open Payments shows $22 in general payments to Dr. Messer from 1 company from 2017 to 2017. The largest total came from Allergan Inc.
How long has Dr. William B. Messer been practicing?
Dr. Messer graduated from medical school in 2006, 20 years ago.
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