Quick answers
- Does William R. Preskenis accept Medicare assignment?
- Yes. Medicare's clinician data says William R. Preskenis 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 William R. Preskenis see?
- In 2024, CMS data shows 412 Original Medicare patients and 1,493 services for William R. Preskenis. This counts Original Medicare only and measures volume, not quality.
- What is William R. Preskenis's NPI number?
- 1104803808. 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 William R. Preskenis, 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 | 412 |
|---|---|
| Services billed to Medicare | 1,493 |
| Different services or procedures | 16 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)746 services
- Test to measure expiratory airflow and volume (94010)314 services
- Test to examine how well the lungs exchange gases (94729)101 services
- Test to determine lung volumes using gas dilution or washout (94727)94 services
- Sleep study including heart rate, breathing, and sleep time (95800)59 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%
- Arthritis53%
- Ischemic heart disease47%
- Atrial fibrillation35%
- Diabetes32%
Practice locations
Addresses where William R. Preskenis is enrolled with Medicare (CMS data updated October 2, 2026).
- 151 Hazard Ave, Suite 9Enfield, CT 06082 (860) 749‑2251
- 27 Sycamore St, Suite 100Glastonbury, CT 06033 (860) 659‑0581
- 30 Jordan LnWethersfield, CT 06109 (860) 263‑0253
- 61 S Main St, Fl 3West Hartford, CT 06107 (860) 247‑2530
Group practices
Medicare enrollment lists William R. Preskenis as a member of this group (CMS data updated October 2, 2026).
- Prime Healthcare, PC67 clinicians in the group
Specialties
- Pulmonary Diseaseprimary
- Internal Medicinealso
Other pulmonologists in Enfield
Clinicians with the same Medicare primary specialty in Enfield, CT — not a recommendation.
Other clinicians in Prime Healthcare, PC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Saint Louis University School Of Medicine |
| Graduation year | 1983 (43 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) | 1104803808 |
| 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