Frederick Greenstein, M.D.
NPI 1174583686 · Urology Physician · Brooklyn, NY
Enrolled with Medicare as Practitioner - Urology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Frederick Greenstein, M.D. is a Urology Physician provider in Brooklyn, NY (NPI 1174583686).
Provider details
- NPI number
- 1174583686
- Entity type
- Individual
- Primary specialty
- Urology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 134704 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
335 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. 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 .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 182 | $73 |
| Initial Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 40 Minutes99221 | 47 | $93 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 34 | $106 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 19 | $93 |
| Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes99231 | 19 | $55 |
| New Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 15 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 20 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Tamsulosin Hcl | 742 | 279 |
| Mirabegronbrand: Myrbetriq | 304 | 66 |
| Oxybutynin Chloridebrand: Oxybutynin Chloride Er | 198 | 69 |
| Finasteride | 197 | 75 |
| Ciprofloxacin Hcl | 96 | 68 |
| Leuprolide Acetatebrand: Eligard | 76 | 34 |
| Bicalutamide | 71 | 23 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$124 across 5 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
- 2006-03-27
- Last updated
- 2020-05-18
- Certified
- 2020-05-18
Frequently asked questions
- What is Frederick Greenstein's NPI number?
- Frederick Greenstein's National Provider Identifier (NPI) is 1174583686, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Frederick Greenstein's specialty?
- Frederick Greenstein is listed in the NPPES registry with a primary specialty of Urology Physician (Allopathic & Osteopathic Physicians).
- Where is Frederick Greenstein located?
- Frederick Greenstein's practice location on file with NPPES is One Brookdale Plaza, Brooklyn, NY 11212-1121.
- What is Frederick Greenstein's phone number?
- The practice phone number listed in the NPPES registry for Frederick Greenstein is (718) 240-8672.
- Does Frederick Greenstein accept Medicare?
- Frederick Greenstein is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Frederick Greenstein's NPI active?
- Yes — Frederick Greenstein's NPI (1174583686) is active in the NPPES registry as of the last update on 2020-05-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.