Demetrius Williams, PMHNP
NPI 1578296489 · Psychiatric/Mental Health Nurse Practitioner · Mandeville, LA
Enrolled with Medicare as Order and Referring Only - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Demetrius Williams, PMHNP is a Psychiatric/Mental Health Nurse Practitioner provider in Mandeville, LA (NPI 1578296489).
Provider details
- NPI number
- 1578296489
- Entity type
- Individual
- Primary specialty
- Psychiatric/Mental Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PMHNP
- Sex
- Male
- Sole proprietor
- No
- License
- 905371 (MS)
Specialties & taxonomies
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
3 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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 21 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Buspirone Hcl | 61 |
| Benztropine Mesylate | 42 |
| Bupropion Hclbrand: Bupropion Xl | 41 |
| Paroxetine Hcl | 39 |
| Quetiapine Fumarate | 35 |
| Aripiprazole | 27 |
| Fluoxetine Hcl | 25 |
| Hydroxyzine Hcl | 25 |
| Trazodone Hcl | 24 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$286 across 15 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
- 2022-07-07
- Last updated
- 2023-05-22
- Certified
- 2023-05-22
Frequently asked questions
- What is Demetrius Williams's NPI number?
- Demetrius Williams's National Provider Identifier (NPI) is 1578296489, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Demetrius Williams's specialty?
- Demetrius Williams is listed in the NPPES registry with a primary specialty of Psychiatric/Mental Health Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Demetrius Williams located?
- Demetrius Williams's practice location on file with NPPES is 1150 W Causeway Approach, Mandeville, LA 70471-3038.
- What is Demetrius Williams's phone number?
- The practice phone number listed in the NPPES registry for Demetrius Williams is (866) 530-6111.
- Does Demetrius Williams accept Medicare?
- Demetrius Williams is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Demetrius Williams's NPI active?
- Yes — Demetrius Williams's NPI (1578296489) is active in the NPPES registry as of the last update on 2023-05-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.