Quick answers
- Does Zachary Z. Brener accept Medicare assignment?
- Yes. Medicare's clinician data says Zachary Z. Brener accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Zachary Z. Brener see?
- In 2024, CMS data shows 868 Original Medicare patients and 7,135 services for Zachary Z. Brener. This counts Original Medicare only and measures volume, not quality.
- What is Zachary Z. Brener's NPI number?
- 1265479539. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Zachary Z. Brener, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 868 |
|---|---|
| Services billed to Medicare | 7,135 |
| Different services or procedures | 40 |
| Participating Medicare provider | Yes |
| Average age of these patients | 78 |
Most frequent services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)1,592 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)1,165 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)580 services
- Dialysis services, 4 or more physician visits per month (20 years or older) (90960)400 services
- Automated urinalysis test (81003)298 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol75%
- Diabetes75%
- Chronic kidney disease75%
- Ischemic heart disease72%
- Arthritis70%
Hospitals where Zachary Z. Brener works
Medicare's Facility Affiliation Data lists Zachary Z. Brener at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Maimonides Medical CenterBrooklyn, NY · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 330194
- Mount Sinai Beth IsraelNew York, NY · Acute Care Hospital · closed, according to its website · CCN 330169
- Mount Sinai HospitalNew York, NY · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 330024
- New York Community Hospital of Brooklyn, Inc.Brooklyn, NY · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 330019
Practice locations
Addresses where Zachary Z. Brener is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 6; the Medicare profile lists all.
- 2107 Ditmas AveBrooklyn, NY 11226 (718) 462‑8500
- 2525 Kings HwyBrooklyn, NY 11229 (718) 692‑5300
- 26 Brighton 11th StBrooklyn, NY 11235 (718) 743‑5955
- 3035 W 24th StBrooklyn, NY 11224 (718) 372‑4500
- 3201 Kings HwyBrooklyn, NY 11234 (718) 252‑3000
Specialties
- Nephrologyprimary
- Internal Medicinealso
Other nephrologists in Brooklyn
Clinicians with the same Medicare primary specialty in Brooklyn, NY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1988 (38 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1265479539 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians