Simon Fensterszaub, D.O.
NPI 1003077322 · Family Medicine Physician · Brooklyn, NY
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Simon Fensterszaub, D.O. is a Family Medicine Physician provider in Brooklyn, NY (NPI 1003077322).
Provider details
- NPI number
- 1003077322
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 249846 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
17 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
24,194 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Chronic Care Management Services, First 20 Minutes of Clinical Staff Time Directed By Health Care Professional, Per Calendar Month99490 | 8,171 | $62 |
| Care Management Services for Behavioral Health Conditions, 20 Minutes Or More Clinical Staff Time Directed By Health Care Professional99484 | 6,538 | $55 |
| Chronic Care Management Services for Two Or More Chronic Conditions, Additional 20 Minutes of Clinical Staff Time Directed By Health Care Professional, Per Calendar Month99439 | 5,352 | $47 |
| Psychiatric Collaborative Care Management Per Calendar Month, Each Additional 30 Minutes99494 | 946 | $60 |
| Follow-Up Psychiatric Collaborative Care Management, Subsequent Calendar Month, First 60 Minutes99493 | 925 | $139 |
| Initial Or Subsequent Psychiatric Collaborative Care Management, First 30 Minutes in a Month of Behavioral Health Care Manager Activities, in Consultation With a Psychiatric Consultant, and Directed By the Treating Physician Or Other Qualified Health Care |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 2 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Metoprolol Succinate | 16 |
| Spironolactone | 14 |
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 no Part D record, 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
Registry dates
- Enumerated
- 2008-06-19
- Last updated
- 2023-02-15
- Certified
- 2023-02-15
Frequently asked questions
- What is Simon Fensterszaub's NPI number?
- Simon Fensterszaub's National Provider Identifier (NPI) is 1003077322, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Simon Fensterszaub's specialty?
- Simon Fensterszaub is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Simon Fensterszaub located?
- Simon Fensterszaub's practice location on file with NPPES is 432 Bedford Ave, Brooklyn, NY 11249-6588.
- What is Simon Fensterszaub's phone number?
- The practice phone number listed in the NPPES registry for Simon Fensterszaub is (718) 964-6161.
- Does Simon Fensterszaub accept Medicare?
- Simon Fensterszaub is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Simon Fensterszaub's NPI active?
- Yes — Simon Fensterszaub's NPI (1003077322) is active in the NPPES registry as of the last update on 2023-02-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.