Ian J. Bristol, M.D.
Radiation Oncology Physician · Portland, ME
Ian J. Bristol, M.D. is a radiation oncology physician with a practice address in Portland, Maine, and NPI 1235357294, issued on Apr 23, 2007. Check the license (Maine MD17399, as entered in NPPES) on the Maine Board of Licensure in Medicine; the Medicare figures below come from public CMS files.
- Name
- Ian J. Bristol
- Credential
- M.D.
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License numbers
- MD17399 ME
25134 NH
Self-reported in NPPES; status is on the state search - Practice location
- 22 Bramhall St, Portland, ME 04102
- Phone
- (207) 662-2276
- Enumerated
- Apr 23, 2007
- Record last updated
- Apr 21, 2026
- Medicare enrollment
- Enrolled (PECOS I20070728000174); accepts Medicare assignment
- Medical or professional school
- University Of Rochester School Of Medicine And Dentistry, 2002
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 27 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 Ian J. Bristol in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaine Board of Licensure in Medicine
Search for license MD17399Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
49% more Medicare Part D claims than the average radiation oncology physician in 2024
200 Medicare Part D claims for 86 beneficiaries, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims.
Most prescribed
- Tamsulosin Hcl118 claims
- Silver Sulfadiazine17 claims
- Fluconazole11 claims
- Levothyroxine Sodium11 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 2 group practices
- Maine Center For Cancer Medicine And Blood Disorders PAWestbrook, ME
- Spectrum Healthcare Partners PAScarborough, ME
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ian J. Bristol among 27 radiation oncology physician records in Maine
Ian J. Bristol, M.D. is one of 27 radiation oncology physician records with a practice address in Maine. 74% 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 48% of them.
- NPI issued2007 · 48% of these records are older, 44% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2002 · median 2012 among the 17 with a school on file
- Record last updated2026 · 26% 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 Maine 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 Maine
There are 27 radiation oncology physician records in Maine.
All 27 in Maine → Every provider in Portland → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- Whitney Beeler, M.D.Portland, ME 041021073908505
- Matthew Cheney, M.D., PH.D.Portland, ME 041021326363714
- Celine Godin, M.D.Portland, ME 041021598773392
- Sujana Gottumukkala, MDPortland, ME 041021134613730
- Daniel Herr, MDPortland, ME 041021174083208
- Cornelius McGinn, M.D.Portland, ME 041021285642082
- Michael Milligan, MDPortland, ME 041021689179566
- Matthew Parsons, MDPortland, ME 041021427581560
Common questions
What is Ian J. Bristol, M.D.'s NPI number?
Ian J. Bristol, M.D.'s National Provider Identifier (NPI) is 1235357294, issued on Apr 23, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Ian J. Bristol, M.D. located?
The NPPES record lists a practice address at 22 Bramhall St, Portland, ME, 04102. Phone: (207) 662-2276. Providers update this record themselves, so call before visiting.
How can I verify Ian J. Bristol, M.D.'s license?
NPPES lists Maine license number MD17399, 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 Ian J. Bristol, M.D. prescribe under Medicare Part D?
In 2024, Ian J. Bristol, M.D. had 200 Medicare Part D claims for 86 beneficiaries; the average among radiation oncology physician prescribers was 134. Part D covers Medicare prescriptions only.
What is Ian J. Bristol, M.D.'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.