William Michael Whalen, M.D.
Pulmonary Disease Physician · Worcester, MA
William Michael Whalen, M.D. is a pulmonary disease physician with a practice address in Worcester, Massachusetts, and NPI 1912386871, issued on May 26, 2015. Check the license (Massachusetts 273430, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- William Michael Whalen
- Credential
- M.D.
- Primary taxonomy
- Pulmonary Disease Physician 207RP1001X
- License number
- 273430 MA
Self-reported in NPPES; status is on the state search - Practice location
- 55 Lake Ave N, Worcester, MA 01655
- Phone
- (508) 334-1975
- Enumerated
- May 26, 2015
- Record last updated
- Jun 5, 2025
- Medicare enrollment
- Enrolled (PECOS I20180510001586); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest pulmonary disease physician records → All 569 in Massachusetts → Look up another NPI →
Also registered at 55 Lake Ave N
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Amarys Abadie, CRNACertified Registered Nurse Anesthetist1992936843
- Paula Abate, NPNurse Practitioner1336265909
- Aly AbayazeedDiagnostic Radiology Physician1821221946
- Zainab AbbasDermatology Physician1609028000
- Mary-Alice Abbott, MDClinical Genetics (M.D.) Physician1982799417
Verify William Michael Whalen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 273430Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
22% fewer Medicare Part D claims than the average pulmonary disease physician in 2024
1,110 Medicare Part D claims for 159 beneficiaries, against an average of 1,425 among the 11,596 providers of this specialty who prescribed in Part D. Brand-name drugs were 57% of claims.
Most prescribed
- Albuterol Sulfate Hfa243 claims
- Breo Ellipta103 claims
- Trelegy Ellipta77 claims
- Anoro Ellipta76 claims
- Ofev67 claims
- Prednisone52 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $91.50
1 payment: food and beverage; the largest payer was Boehringer Ingelheim Pharmaceuticals, Inc. The 8,806 providers of this specialty with any payment received $5,159.88 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Umass Memorial Medical Group IncWorcester, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Michael Whalen among 569 pulmonary disease physician records in Massachusetts
William Michael Whalen, M.D. is one of 569 pulmonary disease physician records with a practice address in Massachusetts. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 84% of them.
- NPI issued2015 · 84% of these records are older, 13% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated2015 · median 2003 among the 407 with a school on file
- Record last updated2025 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RP1001X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Pulmonary Disease Physician providers in Massachusetts
There are 569 pulmonary disease physician records in Massachusetts.
All 569 in Massachusetts → Every provider in Worcester → Pulmonary Disease Physician nationwide →
The 8 pulmonary disease physician records with the nearest ZIP codes
- Kimberly Fisher, M.D.Worcester, MA 016551659399954
- Richard Irwin, MDWorcester, MA 016551619950722
- Scott Kopec, M.D.Worcester, MA 016551437132545
- Hardy Kornfeld, M.D.Worcester, MA 016551124000377
- Stephen Krinzman, M.D.Worcester, MA 016551003898420
- Craig Lilly, M.D.Worcester, MA 016551639139298
- John Madison, M.D.Worcester, MA 016551821070244
- Paulo Oliveira, M.D.Worcester, MA 016551467412122
Common questions
What is William Michael Whalen, M.D.'s NPI number?
William Michael Whalen, M.D.'s National Provider Identifier (NPI) is 1912386871, issued on May 26, 2015. An NPI identifies a provider in billing; it is not a license.
Where is William Michael Whalen, M.D. located?
The NPPES record lists a practice address at 55 Lake Ave N, Worcester, MA, 01655. Phone: (508) 334-1975. Providers update this record themselves, so call before visiting.
How can I verify William Michael Whalen, M.D.'s license?
NPPES lists Massachusetts license number 273430, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William Michael Whalen, M.D. prescribe under Medicare Part D?
In 2024, William Michael Whalen, M.D. had 1,110 Medicare Part D claims for 159 beneficiaries; the average among pulmonary disease physician prescribers was 1,425. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.