William Preskenis, MD
NPI 1104803808 · Pulmonary Disease Physician · Glastonbury, CT
Enrolled with Medicare as Practitioner - Pulmonary Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Preskenis, MD is a Pulmonary Disease Physician provider in Glastonbury, CT (NPI 1104803808).
Provider details
- NPI number
- 1104803808
- Entity type
- Individual
- Primary specialty
- Pulmonary Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 026608 (CT)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,484 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 746 | $132 |
| Test to Measure Expiratory Airflow and Volume94010 | 314 | $29 |
| Test to Examine How Well the Lungs Exchange Gases94729 | 101 | $60 |
| Test to Determine Lung Volumes Using Gas Dilution Or Washout94727 | 94 | $47 |
| Sleep Study Including Heart Rate, Breathing, and Sleep Time95800 | 59 | $144 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 46 | $171 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 27 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Fluticasone/Umeclidin/Vilanterbrand: Trelegy Ellipta | 410 | 102 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 308 | 127 |
| Montelukast Sodium | 258 | 77 |
| Fluticasone/Vilanterolbrand: Breo Ellipta | 171 | 38 |
| Fluticasone Propionate | 127 | 51 |
| Prednisone | 99 | 37 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$3,063 across 120 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-12-23
- Last updated
- 2023-03-07
- Certified
- 2021-06-21
Frequently asked questions
- What is William Preskenis's NPI number?
- William Preskenis's National Provider Identifier (NPI) is 1104803808, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Preskenis's specialty?
- William Preskenis is listed in the NPPES registry with a primary specialty of Pulmonary Disease Physician (Allopathic & Osteopathic Physicians).
- Where is William Preskenis located?
- William Preskenis's practice location on file with NPPES is 27 Sycamore St, Glastonbury, CT 06033-2223.
- What is William Preskenis's phone number?
- The practice phone number listed in the NPPES registry for William Preskenis is (860) 659-0581.
- Does William Preskenis accept Medicare?
- William Preskenis is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Preskenis's NPI active?
- Yes — William Preskenis's NPI (1104803808) is active in the NPPES registry as of the last update on 2023-03-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.