Quick answers
- Does Andrew G. Janssen accept Medicare assignment?
- Yes. Medicare's clinician data says Andrew G. Janssen 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 Andrew G. Janssen see?
- In 2024, CMS data shows 147 Original Medicare patients and 392 services for Andrew G. Janssen. This counts Original Medicare only and measures volume, not quality.
- What is Andrew G. Janssen's NPI number?
- 1003891524. 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 Andrew G. Janssen, 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 | 147 |
|---|---|
| Services billed to Medicare | 392 |
| Different services or procedures | 45 |
| Participating Medicare provider | Yes |
| Average age of these patients | 69 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)72 services
- Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)72 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)50 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)36 services
- Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)12 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 pressure67%
- High cholesterol58%
- Diabetes36%
- Arthritis35%
- Depression33%
- Anxiety33%
Hospitals where Andrew G. Janssen works
Medicare's Facility Affiliation Data lists Andrew G. Janssen 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.
- Blue Mountain HospitalJohn Day, OR · Critical Access Hospital · Emergency services: listed by Medicare · CCN 381305
- Hillsboro Medical CenterHillsboro, OR · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 380021
- OHSU Hospital and ClinicsPortland, OR · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 380009
- Providence Seward HospitalSeward, AK · Critical Access Hospital · Emergency services: listed by Medicare · CCN 021302
Practice locations
Addresses where Andrew G. Janssen is enrolled with Medicare (CMS data updated October 2, 2026).
- 170 Ford RdJohn Day, OR 97845 (541) 575‑1311
- 180 Ford RdJohn Day, OR 97845 (541) 575‑0404
- 335 SE 8th AveHillsboro, OR 97123 (503) 681‑1111
- 7305 SE Circuit Dr, Suite 180Hillsboro, OR 97129 (971) 501‑4930
Group practices
Medicare enrollment lists Andrew G. Janssen as a member of these groups (CMS data updated October 2, 2026).
- Providence Health and Services Oregon1,433 clinicians in the group
- Tuality Medical Group LLC297 clinicians in the group
- Blue Mountain Hospital District29 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in John Day
Clinicians with the same Medicare primary specialty in John Day, OR — not a recommendation.
Other clinicians in Providence Health and Services Oregon
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 | 2002 (24 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1003891524 |
| 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