NPPES file of Aug 9, 2026

Christopher James Altenhofen, MD

Diagnostic Radiology Physician · Portland, OR

Christopher James Altenhofen, MD is a diagnostic radiology physician with a practice address in Portland, Oregon, and NPI 1043327547, issued on Aug 23, 2006. Check the license (Oregon MD16799, as entered in NPPES) on the Oregon Medical Board; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2023 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1043327547
Name
Christopher James Altenhofen
Credential
MD
Primary taxonomy
Diagnostic Radiology Physician 2085R0202X
License number
MD16799 OR
Self-reported in NPPES; status is on the state search
Practice location
233 NE 102ND Ave, Portland, OR 97220
Phone
(503) 253-1105
Enumerated
Aug 23, 2006
Record last updated
Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
Fax
(503) 535-8398
Medicare enrollment
Enrolled (PECOS I20050506000539); accepts Medicare assignment
Medical or professional school
Oregon Health Sciences University School Of Medicine, 1989
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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Also registered at 233 NE 102ND Ave

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Kenneth Curtin, M.D.Diagnostic Radiology Physician1568466548
  2. Daniel Kocarnik, MDDiagnostic Radiology Physician1245346758
  3. Jennifer Mayberry, MDDiagnostic Radiology Physician1467565671
  4. James Pearson, MDDiagnostic Radiology Physician1790790293
  5. Warren Tubbs, MDDiagnostic Radiology Physician1962518662
  6. Thomas Vanderjagt, MD, PH.DDiagnostic Radiology Physician1346637063

Verify Christopher James Altenhofen in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersOregon Medical Board
    Search for license MD16799    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Oregon license search

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The MIPS final score for 2023 (Medicare payment program): 92.6 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.

  1. Qualityout of 100 · 30% of the final score85.3
  2. Costnot scored (reweighted)
  3. Promoting interoperabilitynot scored (reweighted)
  4. Improvement activities40 of 40 points · 15%100.0

Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).

Bills Medicare through one group practice

  1. Epic Imaging PCClackamas, OR

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Diagnostic Radiology Physician providers in Oregon

There are 522 diagnostic radiology physician records in Oregon.

All 522 in Oregon → Every provider in Portland →

Other diagnostic radiology physician records in Oregon

  1. Aaron Abajian, MDClackamas, OR1942732300
  2. Maxwell Abbott, M.D.Salem, OR1174535090
  3. Travis Abele, MDBend, OR1871792168
  4. Darshan Acharya, M.D.Portland, OR1033173638
  5. Ralph Adams, M.D.Salem, OR1730357617
  6. Diwaker Agarwal, MDRoseburg, OR1770573057
  7. Sami Ahmed, DOPortland, OR1891374856
  8. Matthew Allen, M.D.La Grande, OR1558445239
  9. Scott Allen, M.D.Klamath Falls, OR1457508954
  10. James Anderson, MDPortland, OR1376551804

Common questions

What is Christopher James Altenhofen, MD's NPI number?

Christopher James Altenhofen, MD's National Provider Identifier (NPI) is 1043327547, issued on Aug 23, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Christopher James Altenhofen, MD located?

The NPPES record lists a practice address at 233 NE 102ND Ave, Portland, OR, 97220. Phone: (503) 253-1105. Providers update this record themselves, so call before visiting.

How can I verify Christopher James Altenhofen, MD's license?

NPPES lists Oregon license number MD16799, as entered by the provider. Search the Oregon Medical Board at https://www.oregon.gov/OMB/Pages/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

What is Christopher James Altenhofen, MD's MIPS final score?

The 2023 MIPS final score is 92.6 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.