Cashel O'Brien, DO
Cardiovascular Disease Physician · Portland, ME
Cashel O'Brien, DO is a cardiovascular disease physician with a practice address in Portland, Maine, and NPI 1093275612, issued on Mar 20, 2019. Check the license (Maine DO3386, as entered in NPPES) on the Maine Board of Licensure in Medicine; the Medicare figures below come from public CMS files.
- Name
- Cashel O'Brien
- Credential
- DO
- Primary taxonomy
- Cardiovascular Disease Physician 207RC0000X
- License number
- DO3386 ME
Self-reported in NPPES; status is on the state search - Practice location
- 22 Bramhall St, Portland, ME 04102
- Phone
- (207) 662-4618
- Enumerated
- Mar 20, 2019
- Record last updated
- Jul 9, 2026
- Fax
- (207) 662-6254
- Medicare enrollment
- Enrolled (PECOS I20221128001349); accepts Medicare assignment
- Medical or professional school
- University Of New England, College Of Osteo Medicine, 2019
- Entity
- Type 1 · individual
8 nearest cardiovascular disease physician records → All 147 in Maine → Look up another NPI →
Also registered at 22 Bramhall St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jessica Abbatiello, NP-CFamily Nurse Practitioner1871811737
- Ruslan Abdukalikov, DOAnesthesiology Physician1831694793
- Tod Abrahams, M.D.Diagnostic Radiology Physician1538231642
- Joshua Abrams, PA-CSurgical Physician Assistant1932832128
- Christopher Abruzzese, D.OAnesthesiology Physician1558789305
- Haley Acker, PA-CPhysician Assistant1972167377
Verify Cashel O'Brien in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaine Board of Licensure in Medicine
Search for license DO3386Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average cardiovascular disease physician in 2024
132 Medicare Part D claims for 26 beneficiaries, against an average of 3,078 among the 20,728 providers of this specialty who prescribed in Part D. Brand-name drugs were 25% of claims.
Most prescribed
- Metoprolol Succinate16 claims
- Jardiance12 claims
- Lisinopril11 claims
- Rosuvastatin Calcium11 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.
The MIPS final score for 2023 (Medicare payment program): 98.1 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- MainehealthPortland, ME
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Cashel O'Brien among 147 cardiovascular disease physician records in Maine
Cashel O'Brien, DO is one of 147 cardiovascular disease physician records with a practice address in Maine. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 96% of them.
- NPI issued2019 · 96% of these records are older, 1% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated2019 · median 2004 among the 103 with a school on file
- Record last updated2026 · 65% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RC0000X and a Maine practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Cardiovascular Disease Physician providers in Maine
There are 147 cardiovascular disease physician records in Maine.
All 147 in Maine → Every provider in Portland → Cardiovascular Disease Physician nationwide →
The 8 cardiovascular disease physician records with the nearest ZIP codes
- Bram Geller, M.D.Portland, ME 041021275828311
- Sebastian Jablonski, D.O.Portland, ME 041021093151094
- Adam Karpman, D.O.Portland, ME 041021093002750
- Terence Lee, MDPortland, ME 041021457094393
- Mikhail Romashko, MDPortland, ME 041021427407931
- Benjamin Starobin, M.D.Portland, ME 041021457715690
- Zachary Trzaska, MDPortland, ME 041021053510768
- Craig Brett, M.D.Portland, ME 041011841270535
Common questions
What is Cashel O'Brien, DO's NPI number?
Cashel O'Brien, DO's National Provider Identifier (NPI) is 1093275612, issued on Mar 20, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Cashel O'Brien, DO located?
The NPPES record lists a practice address at 22 Bramhall St, Portland, ME, 04102. Phone: (207) 662-4618. Providers update this record themselves, so call before visiting.
How can I verify Cashel O'Brien, DO's license?
NPPES lists Maine license number DO3386, 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 Cashel O'Brien, DO prescribe under Medicare Part D?
In 2024, Cashel O'Brien, DO had 132 Medicare Part D claims for 26 beneficiaries; the average among cardiovascular disease physician prescribers was 3,078. Part D covers Medicare prescriptions only.
What is Cashel O'Brien, DO's MIPS final score?
The 2023 MIPS final score is 98.1 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.