Hyacinth Williamson, MD
NPI 1104954239 · Psychiatry Physician · Brooklyn, NY
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Hyacinth Williamson, MD is a Psychiatry Physician provider in Brooklyn, NY (NPI 1104954239).
Provider details
- NPI number
- 1104954239
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 177878 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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) |
|---|---|
| Mirtazapine | 67 |
| Sertraline Hcl | 65 |
| Trazodone Hcl | 48 |
| Escitalopram Oxalate | 45 |
| Aripiprazole | 40 |
| Hydroxyzine Pamoate | 32 |
| Paroxetine Hcl | 29 |
| Quetiapine Fumarate | 27 |
| Clonazepam | 24 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-03-01
- Last updated
- 2007-07-08
Frequently asked questions
- What is Hyacinth Williamson's NPI number?
- Hyacinth Williamson's National Provider Identifier (NPI) is 1104954239, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Hyacinth Williamson's specialty?
- Hyacinth Williamson is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Hyacinth Williamson located?
- Hyacinth Williamson's practice location on file with NPPES is 2581 Atlantic Ave, Brooklyn, NY 11207-2412.
- What is Hyacinth Williamson's phone number?
- The practice phone number listed in the NPPES registry for Hyacinth Williamson is (718) 495-6700.
- Does Hyacinth Williamson accept Medicare?
- Hyacinth Williamson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Hyacinth Williamson's NPI active?
- Yes — Hyacinth Williamson's NPI (1104954239) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.