Quick answers
- Does Jeffrey F. Williams accept Medicare assignment?
- Yes. Medicare's clinician data says Jeffrey F. Williams 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 Jeffrey F. Williams see?
- In 2024, CMS data shows 523 Original Medicare patients and 3,932 services for Jeffrey F. Williams. This counts Original Medicare only and measures volume, not quality.
- What is Jeffrey F. Williams's NPI number?
- 1225007438. 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 Jeffrey F. Williams, 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 | 523 |
|---|---|
| Services billed to Medicare | 3,932 |
| Different services or procedures | 78 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Automated urinalysis test (81003)519 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)297 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)168 services
- Ultrasound measurement of bladder capacity after voiding (51798)79 services
- Insertion of needle into vein for collection of blood sample (36415)72 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%
- Arthritis42%
- Ischemic heart disease39%
- Diabetes36%
- Chronic kidney disease27%
Hospitals where Jeffrey F. Williams works
Medicare's Facility Affiliation Data lists Jeffrey F. Williams 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.
- Clara Maass Medical CenterBelleville, NJ · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 310009
- Hackensack Meridian Mountainside MedicalMontclair, NJ · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 310054
Practice locations
Addresses where Jeffrey F. Williams is enrolled with Medicare (CMS data updated October 2, 2026).
- 1 Diamond Hill RdBerkeley Heights, NJ 07922 (908) 273‑4300
Group practices
Medicare enrollment lists Jeffrey F. Williams as a member of this group (CMS data updated October 2, 2026).
- Summit Medical Group PA1,212 clinicians in the group
Specialties
- Urologyprimary
Other urologists in Berkeley Heights
Clinicians with the same Medicare primary specialty in Berkeley Heights, NJ — not a recommendation.
Other clinicians in Summit Medical Group PA
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Rutgers R W Johnson Medical School (cam/new Bruns/pisc) |
| Graduation year | 1995 (31 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) | 1225007438 |
| 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