Alexander Posell, MD
NPI 1598384315 · Psychiatry Physician · Brooklyn, NY
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alexander Posell, MD is a Psychiatry Physician provider in Brooklyn, NY (NPI 1598384315).
Provider details
- NPI number
- 1598384315
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 319892 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
6 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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 · 8 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Benztropine Mesylate | 26 |
| Divalproex Sodiumbrand: Divalproex Sodium Er | 26 |
| Clozapine | 22 |
| Sertraline Hcl | 18 |
| Hydroxyzine Hcl | 15 |
| Risperidone | 15 |
| Trazodone Hcl | 13 |
| Paliperidonebrand: Paliperidone Er | 11 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means , never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Additional practice locations (1)
- 303 5th AveNew York, NY 10016-6601Phone: (646) 397-3017Fax: (646) 585-4389
Registry dates
- Enumerated
- 2020-04-11
- Last updated
- 2025-12-11
- Certified
- 2025-12-11
Frequently asked questions
- What is Alexander Posell's NPI number?
- Alexander Posell's National Provider Identifier (NPI) is 1598384315, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alexander Posell's specialty?
- Alexander Posell is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Alexander Posell located?
- Alexander Posell's practice location on file with NPPES is 189 S 9th St Apt 20, Brooklyn, NY 11211-6159.
- What is Alexander Posell's phone number?
- The practice phone number listed in the NPPES registry for Alexander Posell is (213) 393-3711.
- Does Alexander Posell accept Medicare?
- Alexander Posell is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alexander Posell's NPI active?
- Yes — Alexander Posell's NPI (1598384315) is active in the NPPES registry as of the last update on 2025-12-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.