Quick answers
- Does Clifford Rubin accept Medicare assignment?
- Yes. Medicare's clinician data says Clifford Rubin 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 Clifford Rubin see?
- In 2024, CMS data shows 170 Original Medicare patients and 477 services for Clifford Rubin. This counts Original Medicare only and measures volume, not quality.
- What is Clifford Rubin's NPI number?
- 1942375225. 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 Clifford Rubin, 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 | 170 |
|---|---|
| Services billed to Medicare | 477 |
| Different services or procedures | 18 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)151 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)138 services
- Hospital discharge day management, more than 30 minutes (99239)68 services
- Prolonged hospital inpatient or observation care evaluation and management service(s) beyond the total time for the primary service (when the primary service has been selected using time on the date of the primary service); each additional 15 minutes by th (G0316)40 services
- Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)17 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).
- High blood pressure75%
- High cholesterol68%
- Arthritis49%
- Anxiety48%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)42%
- Chronic kidney disease40%
Hospitals where Clifford Rubin works
Medicare's Facility Affiliation Data lists Clifford Rubin 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.
- MaineHealth Maine Medical CenterPortland, ME · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 200009
- Portsmouth Regional HospitalPortsmouth, NH · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 300029
Practice locations
Addresses where Clifford Rubin is enrolled with Medicare (CMS data updated October 2, 2026).
- 155 Borthwick Ave, Suite CPortsmouth, NH 03801 (603) 828‑0100
- 2 Independence DrKennebunk, ME 04043 (207) 303‑3300
- 335 Brighton AvePortland, ME 04102 (207) 518‑8869
Group practices
Medicare enrollment lists Clifford Rubin as a member of these groups (CMS data updated October 2, 2026).
- Maine Center for Cancer Medicine and Blood Disorders PA70 clinicians in the group
- Maine Medical Consultants PC51 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Portsmouth
Clinicians with the same Medicare primary specialty in Portsmouth, NH — not a recommendation.
Other clinicians in Maine Center for Cancer Medicine and Blood Disorders PA
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | Arizona College Of Osteopathic Medicine Mid Western University |
| Graduation year | 2005 (21 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1942375225 |
| 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