William Mazalewski, DO
NPI 1841652948 · Pulmonary Disease Physician · Sarasota, FL
Enrolled with Medicare as Practitioner - Pulmonary Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Mazalewski, DO is a Pulmonary Disease Physician provider in Sarasota, FL (NPI 1841652948).
Provider details
- NPI number
- 1841652948
- Entity type
- Individual
- Primary specialty
- Pulmonary Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- 312508 (LA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
10 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
4 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
1,898 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 502 | $118 |
| Critical Care, First 30-74 Minutes99291 | 374 | $213 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 272 | $126 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 191 | $171 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 121 | $89 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 11 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 84 | 31 |
| Umeclidinium Brm/Vilanterol Trbrand: Anoro Ellipta | 52 | 12 |
| Fluticasone/Umeclidin/Vilanterbrand: Trelegy Ellipta | 52 | 16 |
| Budesonide/Formoterol Fumaratebrand: Symbicort | 32 | — |
| Tiotropium Br/Olodaterol Hclbrand: Stiolto Respimat | 30 | — |
| Fluticasone/Vilanterolbrand: Breo Ellipta | 24 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$623 across 28 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
Additional practice locations (3)
- 200 Healthcare Way Unit 102North Venice, FL 34275-3670Phone: (941) 366-5864
- 2600 Laurel Rd ENorth Venice, FL 34275-3226Phone: (941) 917-9000
- 1700 S Tamiami TrlSarasota, FL 34239-3555Phone: (941) 917-9000
Registry dates
- Enumerated
- 2016-03-28
- Last updated
- 2022-05-12
- Certified
- 2022-05-12
Frequently asked questions
- What is William Mazalewski's NPI number?
- William Mazalewski's National Provider Identifier (NPI) is 1841652948, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Mazalewski's specialty?
- William Mazalewski is listed in the NPPES registry with a primary specialty of Pulmonary Disease Physician (Allopathic & Osteopathic Physicians).
- Where is William Mazalewski located?
- William Mazalewski's practice location on file with NPPES is 1921 Waldemere St Ste 705, Sarasota, FL 34239-2913.
- What is William Mazalewski's phone number?
- The practice phone number listed in the NPPES registry for William Mazalewski is (941) 366-5864.
- Does William Mazalewski accept Medicare?
- William Mazalewski is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Mazalewski's NPI active?
- Yes — William Mazalewski's NPI (1841652948) is active in the NPPES registry as of the last update on 2022-05-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.