Quick answers
- Does Ian J. Bristol accept Medicare assignment?
- Yes. Medicare's clinician data says Ian J. Bristol accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Ian J. Bristol see?
- In 2024, CMS data shows 299 Original Medicare patients and 1,637 services for Ian J. Bristol. This counts Original Medicare only and measures volume, not quality.
- What is Ian J. Bristol's NPI number?
- 1235357294. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Ian J. Bristol, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 299 |
|---|---|
| Services billed to Medicare | 1,637 |
| Different services or procedures | 36 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Ct guidance for insertion of radiation therapy fields (77014)572 services
- Radiation treatment management, 5 treatment sessions (77427)156 services
- Calculation of radiation therapy dose (77300)149 services
- Stereoscopic x-ray guidance for localization of target volume for the delivery of radiation therapy (G6002)144 services
- Design and construction of complex radiation treatment device (77334)91 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)75%
- High cholesterol69%
- High blood pressure66%
- Arthritis35%
- Anxiety24%
- Chronic kidney disease24%
Hospitals where Ian J. Bristol works
Medicare's Facility Affiliation Data lists Ian J. Bristol at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- LincolnhealthDamariscotta, ME · Critical Access Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 201302
- MaineHealth Maine Medical CenterPortland, ME · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 200009
- MaineHealth Mid Coast HospitalBrunswick, ME · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 200021
- MaineHealth Pen Bay HospitalRockport, ME · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 200063
- Portsmouth Regional HospitalPortsmouth, NH · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 300029
Practice locations
Addresses where Ian J. Bristol is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 7; the Medicare profile lists all.
- 100 Campus DrScarborough, ME 04074 (207) 396‑7600
- 100 Campus Dr, Suite 101Scarborough, ME 04074 (207) 396‑7600
- 11 Rock Row, Suite 120Westbrook, ME 04092 (207) 303‑3300
- 15 Rock Row, Suite 110Westbrook, ME 04092 (207) 303‑3300
- 22 Bramhall StPortland, ME 04102 (207) 871‑2571
Group practices
Medicare enrollment lists Ian J. Bristol as a member of these groups (CMS data updated October 2, 2026).
- Spectrum Healthcare Partners PA308 clinicians in the group
- Maine Center for Cancer Medicine and Blood Disorders PA70 clinicians in the group
Specialties
- Radiation Oncologyprimary
Other radiation oncologists in Scarborough
Clinicians with the same Medicare primary specialty in Scarborough, ME — not a recommendation.
Other clinicians in Spectrum Healthcare Partners PA
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Rochester School Of Medicine And Dentistry |
| Graduation year | 2002 (24 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1235357294 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians