Quick answers
- Does Robert F. Mazzeo accept Medicare assignment?
- Yes. Medicare's clinician data says Robert F. Mazzeo 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 Robert F. Mazzeo see?
- In 2024, CMS data shows 306 Original Medicare patients and 1,525 services for Robert F. Mazzeo. This counts Original Medicare only and measures volume, not quality.
- What is Robert F. Mazzeo's NPI number?
- 1043240534. 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 Robert F. Mazzeo, 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 | 306 |
|---|---|
| Services billed to Medicare | 1,525 |
| Different services or procedures | 25 |
| Participating Medicare provider | Yes |
| Average age of these patients | 71 |
Most frequent services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)410 services
- Assessment of emotional or behavioral problems (96127)289 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)190 services
- Insertion of needle into vein for collection of blood sample (36415)165 services
- Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)76 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 cholesterol75%
- High blood pressure70%
- Arthritis35%
- Ischemic heart disease31%
- Diabetes30%
- Chronic kidney disease16%
Practice locations
Addresses where Robert F. Mazzeo is enrolled with Medicare (CMS data updated October 2, 2026).
- 640 Hawkins AveLake Ronkonkoma, NY 11779 (631) 737‑0100
Group practices
Medicare enrollment lists Robert F. Mazzeo as a member of this group (CMS data updated October 2, 2026).
- Advantagecare Physicians PC303 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Lake Ronkonkoma
Clinicians with the same Medicare primary specialty in Lake Ronkonkoma, NY — not a recommendation.
Other clinicians in Advantagecare Physicians PC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1982 (44 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1043240534 |
| 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