William Whalen, M.D.
NPI 1912386871 · Pulmonary Disease Physician · Worcester, MA
Enrolled with Medicare as Practitioner - Pulmonary Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Whalen, M.D. is a Pulmonary Disease Physician provider in Worcester, MA (NPI 1912386871).
Provider details
- NPI number
- 1912386871
- Entity type
- Individual
- Primary specialty
- Pulmonary Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 273430 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
11 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
312 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) |
|---|---|---|
| Critical Care, First 30-74 Minutes99291 | 63 | $232 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 60 | $136 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 33 | $186 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 30 | $99 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 26 | $196 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 23 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 243 | 82 |
| Fluticasone/Vilanterolbrand: Breo Ellipta | 103 | 28 |
| Fluticasone/Umeclidin/Vilanterbrand: Trelegy Ellipta | 77 | 18 |
| Umeclidinium Brm/Vilanterol Trbrand: Anoro Ellipta | 76 | 20 |
| Nintedanib Esylatebrand: Ofev | 67 | 13 |
| Prednisone | 52 | 25 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$92 across 1 record (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 (1)
- 119 Belmont StWorcester, MA 01605-2903Phone: (508) 334-1975
Registry dates
- Enumerated
- 2015-05-26
- Last updated
- 2025-06-05
- Certified
- 2025-06-05
Frequently asked questions
- What is William Whalen's NPI number?
- William Whalen's National Provider Identifier (NPI) is 1912386871, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Whalen's specialty?
- William Whalen is listed in the NPPES registry with a primary specialty of Pulmonary Disease Physician (Allopathic & Osteopathic Physicians).
- Where is William Whalen located?
- William Whalen's practice location on file with NPPES is 55 Lake Ave N, Worcester, MA 01655-0002.
- What is William Whalen's phone number?
- The practice phone number listed in the NPPES registry for William Whalen is (508) 334-1975.
- Does William Whalen accept Medicare?
- William Whalen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Whalen's NPI active?
- Yes — William Whalen's NPI (1912386871) is active in the NPPES registry as of the last update on 2025-06-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.