Quick answers
- Does Christopher J. Altenhofen accept Medicare assignment?
- Yes. Medicare's clinician data says Christopher J. Altenhofen 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 Christopher J. Altenhofen see?
- In 2024, CMS data shows 1,668 Original Medicare patients and 44,823 services for Christopher J. Altenhofen. This counts Original Medicare only and measures volume, not quality.
- What is Christopher J. Altenhofen's NPI number?
- 1043327547. 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 Christopher J. Altenhofen, 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 | 1,668 |
|---|---|
| Services billed to Medicare | 44,823 |
| Different services or procedures | 163 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Injection, gadoterate meglumine, 0.1 ml (A9575)32,175 services
- Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml (Q9967)10,350 services
- Mri scan of lower spinal canal without contrast (72148)164 services
- X-ray of chest, 2 views (71046)153 services
- Mri scan of pelvis before and after contrast (72197)109 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 cholesterol64%
- High blood pressure59%
- Arthritis50%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)23%
- Depression22%
- Chronic kidney disease22%
Practice locations
Addresses where Christopher J. Altenhofen is enrolled with Medicare (CMS data updated October 2, 2026).
- 10121 SE Sunnyside Rd, Suite 170Clackamas, OR 97015 (877) 540‑1614
- 10121 SE Sunnyside Rd, Suite 325Clackamas, OR 97015 (877) 540‑1614
- 233 NE 102nd AvePortland, OR 97220 (503) 535‑8396
- 8950 SW Nimbus AveBeaverton, OR 97008 (503) 372‑1800
Group practices
Medicare enrollment lists Christopher J. Altenhofen as a member of this group (CMS data updated October 2, 2026).
- Epic Imaging PC6 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in Clackamas
Clinicians with the same Medicare primary specialty in Clackamas, OR — not a recommendation.
Other clinicians in Epic Imaging PC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Oregon Health Sciences University School Of Medicine |
| Graduation year | 1989 (37 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1043327547 |
| 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
- 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