Charles Williamson, NP
NPI 1740446335 · Psychiatric/Mental Health Nurse Practitioner · Portland, OR
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Charles Williamson, NP is a Psychiatric/Mental Health Nurse Practitioner provider in Portland, OR (NPI 1740446335).
Provider details
- NPI number
- 1740446335
- Entity type
- Individual
- Primary specialty
- Psychiatric/Mental Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- NP
- Sex
- Male
- Sole proprietor
- No
- License
- 202114724NP-PP (OR)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
17 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$374 across 9 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-08-02
- Last updated
- 2025-10-01
- Certified
- 2025-10-01
Frequently asked questions
- What is Charles Williamson's NPI number?
- Charles Williamson's National Provider Identifier (NPI) is 1740446335, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Charles Williamson's specialty?
- Charles Williamson is listed in the NPPES registry with a primary specialty of Psychiatric/Mental Health Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Charles Williamson located?
- Charles Williamson's practice location on file with NPPES is 2119 Ne Halsey St, Portland, OR 97232-1522.
- What is Charles Williamson's phone number?
- The practice phone number listed in the NPPES registry for Charles Williamson is (503) 975-9398.
- Does Charles Williamson accept Medicare?
- Charles Williamson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Charles Williamson's NPI active?
- Yes — Charles Williamson's NPI (1740446335) is active in the NPPES registry as of the last update on 2025-10-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.