Quick answers
- Does Cameron W. Brennan accept Medicare assignment?
- Yes. Medicare's clinician data says Cameron W. Brennan 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 Cameron W. Brennan see?
- In 2024, CMS data shows 128 Original Medicare patients and 268 services for Cameron W. Brennan. This counts Original Medicare only and measures volume, not quality.
- What is Cameron W. Brennan's NPI number?
- 1689659963. 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 Cameron W. Brennan, 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 | 128 |
|---|---|
| Services billed to Medicare | 268 |
| Different services or procedures | 36 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Computer-assisted procedure inside brain (61781)34 services
- New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)28 services
- Use of operating microscope (69990)25 services
- Removal of skull bone for removal of growth of upper brain (61510)17 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)17 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%
- Arthritis51%
- Anxiety43%
- Ischemic heart disease38%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)38%
Practice locations
Addresses where Cameron W. Brennan is enrolled with Medicare (CMS data updated October 2, 2026).
- 1275 York AveNew York, NY 10065 (212) 639‑2000
- 225 Summit AveMontvale, NJ 07645 (908) 542‑3336
Group practices
Medicare enrollment lists Cameron W. Brennan as a member of these groups (CMS data updated October 2, 2026).
- MSKCC Surgery Group369 clinicians in the group
- MSK Bergen255 clinicians in the group
Specialties
- Neurosurgeryprimary
Other neurosurgeons in New York
Clinicians with the same Medicare primary specialty in New York, NY — not a recommendation.
Other clinicians in MSKCC Surgery Group
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Js Weill Medical College, Cornell University |
| Graduation year | 1994 (32 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1689659963 |
| 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
- 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