Thomas Michael O'Mara, M.D.
Emergency Medicine Physician · Portland, ME
Thomas Michael O'Mara, M.D. is an emergency medicine physician with a practice address in Portland, Maine, and NPI 1922052687, issued on May 19, 2006. Check the license (Maine 018222, as entered in NPPES) on the Maine Board of Licensure in Medicine; the Medicare figures below come from public CMS files.
- Name
- Thomas Michael O'Mara
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- 018222 ME
D58430 MD
Self-reported in NPPES; status is on the state search - Practice location
- 144 State St, Portland, ME 04101
- Phone
- (207) 879-3265
- Enumerated
- May 19, 2006
- Record last updated
- Sep 3, 2009 (not updated in 17 years: call before relying on the address or phone)
- Medicaid IDs
- 434617699 ME
405005300 MD - Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 466 in Maine → Look up another NPI →
Also registered at 144 State St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Francis Altman, M.D.Anesthesiology Physician1033138797
- David Andrews, M.D.Anesthesiology Physician1861429268
- Sandra Aubelangella, CNSPsychiatric/Mental Health Nurse Practitioner1306883129
- Mary Louise Bates, M.D.Anesthesiology Physician1427035666
- Normand Begin, CRNACertified Registered Nurse Anesthetist1235186412
- Denise BenedictPhysician Office Based Coding Specialist1487907978
Verify Thomas Michael O'Mara in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaine Board of Licensure in Medicine
Search for license 018222Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
1% more Medicare Part D claims than the average emergency medicine physician in 2024
229 Medicare Part D claims for 172 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 42 claims were for opioids.
Most prescribed
- Prednisone27 claims
- Cephalexin24 claims
- Hydrocodone-Acetaminophen22 claims
- Doxycycline Monohydrate21 claims
- Amoxicillin-Clavulanate Potass16 claims
- Azithromycin12 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.
Thomas Michael O'Mara among 466 emergency medicine physician records in Maine
Thomas Michael O'Mara, M.D. is one of 466 emergency medicine physician records with a practice address in Maine. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 2% of them.
- NPI issued2006 · 2% of these records are older, 62% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2009 · 52% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Maine practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
105 emergency medicine physician records list a practice address in Portland
They are 105 of the 6,022 NPPES records with a practice address in Portland, and 466 emergency medicine physician records in Maine.
All 466 in Maine → Every provider in Portland → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Rebecca Bloch, M.D.Portland, ME 041011366499592
- Rebecca Dreher, M.D.Portland, ME 041011760617559
- Jordan Gallo, M.D.Portland, ME 041011326208760
- Kellie Ann Goudreau, MS, PA-CPortland, ME 041011235410515
- Gregory Heaphy, M.D.Portland, ME 041011083050801
- John Henson, M.D.Portland, ME 041011568406973
- Marc Hoffman, M.D.Portland, ME 041011023053055
- Scott Russo, D.O.Portland, ME 041011619913969
Common questions
What is Thomas Michael O'Mara, M.D.'s NPI number?
Thomas Michael O'Mara, M.D.'s National Provider Identifier (NPI) is 1922052687, issued on May 19, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Thomas Michael O'Mara, M.D. located?
The NPPES record lists a practice address at 144 State St, Portland, ME, 04101. Phone: (207) 879-3265. Providers update this record themselves, so call before visiting.
How can I verify Thomas Michael O'Mara, M.D.'s license?
NPPES lists Maine license number 018222, as entered by the provider. Search the Maine Board of Licensure in Medicine at https://www.maine.gov/md/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Thomas Michael O'Mara, M.D. prescribe under Medicare Part D?
In 2024, Thomas Michael O'Mara, M.D. had 229 Medicare Part D claims for 172 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.