Charles E. Williamson, NP
- Part D claims, 2024
- 21
- Industry payments
- $6,554
- Affiliated sites
- 1
- Medical groups
- 2
- State license
- 1
- Practice address
- 5220 Ne 122nd Ave, Portland, OR 97230
- Practice phone
- Call (503) 306-1205
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Quest Diagnostics - Portland
Clinical Lab - Full Service · Portland, Oregon
Find Charles Williamson'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.
Charles E. Williamson is a psychiatric/mental health nurse practitioner in Portland, Oregon
Charles Williamson practices at Quest Diagnostics - Portland in Portland, Oregon.
Charles Williamson's NPI, 1740446335, was assigned on August 2, 2008. Charles Williamson holds Oregon license 202114724NP-PP.
- NPI
- 1740446335NPI Registry (opens in a new tab)
- NPI enumeration date
- August 2, 2008
- NPI status
- Active
- Practice phone
- (503) 306-1205
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 44
- Medical school graduation
- 2008
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Charles E. Williamson practices at Quest Diagnostics - Portland in Portland, Oregon
Charles Williamson's primary practice is Quest Diagnostics - Portland, at 5220 Ne 122nd Ave, Portland, OR 97230. The practice phone is (503) 306-1205.
- Quest Diagnostics - Portland5220 Ne 122nd Ave, Portland, OR 97230Phone(503) 306-1205
Source: Dmand AI Affiliation Data
Charles E. Williamson is affiliated with 1 site of care and 2 medical groups
Charles Williamson's primary practice is Quest Diagnostics - Portland in Portland, Oregon. The medical group on file is UCSF Medical Group. Dmand AI also links Charles Williamson to 1 more medical group, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Charles E. Williamson's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Charles Williamson practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Quest Diagnostics - Portland | Available with a free account |
| +1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Charles E. Williamson is one of 759 psychiatric/mental health nurse practitioners in Oregon
Psychiatric/mental health is Charles Williamson's primary specialty in the NPI Registry, under taxonomy code 363LP0808X. Charles Williamson is licensed in Oregon.
Specialties and state licenses
- Psychiatric/mental health nurse practitioner, OregonPrimary
Psychiatric/mental health nurse practitioners near Charles Williamson
Counts of psychiatric/mental health nurse practitioners 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
Charles E. Williamson's patients have a median age of 37
Across all payers, Dmand AI patient panel data puts Charles Williamson's median patient age at 37, with 31% women.
Charles Williamson's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 37
Patient panel by sex, all payers
- Women31%
- Men64%
Source: Dmand AI Patient Panel Data
Charles E. Williamson wrote 21 Medicare Part D claims in 2024
In 2024, Charles Williamson wrote 21 Medicare Part D claims. 90% of them were for generic drugs.
Charles Williamson's Part D claims by kind of drug, 2024
- Generic19 claims90%
- Brand-name and other2 claims10%
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Charles E. Williamson received $6,554 in industry payments in 2025
CMS Open Payments shows 21 general payments to Charles Williamson from 4 drug and device companies in 2025. Speaker and faculty fees make up the largest share, 69% of the total. ViiV Healthcare Company paid the most, $6,304.
General payments to Charles Williamson by kind, 2025 to 2025
- Speaker and faculty fees$4,50069%
- Travel and lodging$1,62225%
- Food and beverage$4327%
Companies that paid Charles Williamson the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Charles E. Williamson'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 patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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 Charles E. Williamson
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Charles E. Williamson's NPI number?
Charles E. Williamson's NPI number is 1740446335. It was assigned on August 2, 2008, and it is active in the NPI Registry.
What does Charles E. Williamson specialize in?
Charles E. Williamson is a psychiatric/mental health nurse practitioner in Portland, Oregon. The primary specialty in the NPI Registry is Psychiatric/Mental Health Nurse Practitioner (taxonomy code 363LP0808X).
Where does Charles E. Williamson practice?
Charles Williamson practices at 5220 Ne 122nd Ave, Portland, OR 97230. Charles Williamson's primary practice is Quest Diagnostics - Portland in Portland, Oregon. Dmand AI also links Charles Williamson to 1 medical group.
What is Charles E. Williamson's office phone number?
The practice phone on file for Charles Williamson is (503) 306-1205.
What is Charles E. Williamson's medical license number?
Charles Williamson holds Oregon license 202114724NP-PP.
What medical group is Charles E. Williamson part of?
Charles Williamson is linked to UCSF Medical Group. Dmand AI links Charles Williamson to 1 more medical group.
Has Charles E. Williamson received payments from drug or device companies?
CMS Open Payments shows $6,554 in general payments to Charles Williamson from 4 companies from 2025 to 2025. The largest total came from ViiV Healthcare Company.
How long has Charles E. Williamson been practicing?
Charles Williamson graduated from medical school in 2008, 18 years ago.
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