William P. O'Meara, M.D.
Radiation Oncology Physician · Lowell, MA
William P. O'Meara, M.D. is a radiation oncology physician with a practice address in Lowell, Massachusetts, and NPI 1598886897, issued on Apr 3, 2007. Check the license (Massachusetts 249953, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- William P. O'Meara
- Credential
- M.D.
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License numbers
- 249953 MA
15486 NH
224644 NY
MD441007 PA
Self-reported in NPPES; status is on the state search - Practice location
- 295 Varnum Ave, Lowell, MA 01854
- Phone
- (978) 937-6274
- Enumerated
- Apr 3, 2007
- Record last updated
- Mar 28, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (978) 934-8490
- Medicaid IDs
- 110090962A MA
3083660 NH - Medicare enrollment
- Enrolled (PECOS I20120824000636); accepts Medicare assignment
- Medical or professional school
- Tulane University School Of Medicine, 1997
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 241 in Massachusetts → Look up another NPI →
Also registered at 295 Varnum Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Rachelle Aaron, CNMAdvanced Practice Midwife1407355878
- Scott Abel, MDDiagnostic Radiology Physician1124020201
- Stella Abhyankar, MDInternal Medicine Physician1487697736
- Donald Agostinelli, M.D.Anatomic Pathology & Clinical Pathology Physician1144296450
- Muneer Ahmad, MDHospitalist Physician1902151301
- Jokha Ahmed, MDGeriatric Medicine (Internal Medicine) Physician1306369749
Verify William P. O'Meara in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 249953Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
84% more Medicare Part D claims than the average radiation oncology physician in 2024
246 Medicare Part D claims for 96 beneficiaries, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D. Brand-name drugs were 6% of claims. 56 claims were for opioids.
Most prescribed
- Tamsulosin Hcl63 claims
- Oxycodone Hcl39 claims
- Lidocaine Hcl Viscous25 claims
- Memantine Hcl13 claims
- Lorazepam11 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.
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Radiation Oncology Associates, PAManchester, NH
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William P. O'Meara among 241 radiation oncology physician records in Massachusetts
William P. O'Meara, M.D. is one of 241 radiation oncology physician records with a practice address in Massachusetts. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 41% of them.
- NPI issued2007 · 41% of these records are older, 49% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated1997 · median 2006 among the 172 with a school on file
- Record last updated2018 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0001X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Radiation Oncology Physician providers in Massachusetts
There are 241 radiation oncology physician records in Massachusetts.
All 241 in Massachusetts → Every provider in Lowell → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- Naomi Jiang, M.D.Lowell, MA 018541164803011
- Vivek Patel, M.D., PH.D.Lowell, MA 018541477997914
- Jeffrey Goldstein, M.D.Lowell, MA 018511528026929
- Cherry ThomasWinchester, MA 018901710385844
- James Cassady, MDBurlington, MA 018051871659227
- Howard Hsu, M.D.Burlington, MA 018051952513392
- Klaudia Hunter, MDBurlington, MA 018051346498789
- Herbert Leventhal, MDBurlington, MA 018051255488102
Common questions
What is William P. O'Meara, M.D.'s NPI number?
William P. O'Meara, M.D.'s National Provider Identifier (NPI) is 1598886897, issued on Apr 3, 2007. An NPI identifies a provider in billing; it is not a license.
Where is William P. O'Meara, M.D. located?
The NPPES record lists a practice address at 295 Varnum Ave, Lowell, MA, 01854. Phone: (978) 937-6274. Providers update this record themselves, so call before visiting.
How can I verify William P. O'Meara, M.D.'s license?
NPPES lists Massachusetts license number 249953, 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 P. O'Meara, M.D. prescribe under Medicare Part D?
In 2024, William P. O'Meara, M.D. had 246 Medicare Part D claims for 96 beneficiaries; the average among radiation oncology physician prescribers was 134. Part D covers Medicare prescriptions only.
What is William P. O'Meara, M.D.'s MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
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.