Dr. Mark W. Joseph, M.D.
Pediatric Nephrology (Pediatric Nephrology Physician)
- Medicare participating
At a glance
- Medical school
- University of Arizona College of Medicine (1991)
- Years since graduation
- 35
- In the NPI registry since
- 2006
- Medicare patients seen, 2024
- 12
The NPI date is when this clinician registered for a National Provider Identifier, the billing number used on health claims. It is not a license, graduation or board-certification date. NPIs were first issued in May 2005 and became required on claims in 2007–2008, so an early date usually means the clinician was already in practice before then. What an NPI is
Education and training
- 1991Medical school: University of Arizona College of Medicine
- 2006Registered with an NPI (national billing number; not a license date) — NPIs began in 2005, so practice likely started earlier
Undergraduate school, residency, fellowship, licensing exams and board certification aren’t in public federal data. Board certification can be confirmed with the certifying board (ABMS member boards for MDs, AOA boards for DOs).
Specialties and state licenses
-
Pediatric Nephrology Physician primary
OR license MD210371 · AZ license 25446 -
Pediatrics Physician
OR license MD210371
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Where they work
Hospitals
- Ohsu Hospital and Clinics Portland, OR
Medical groups
- University Professional Services (1,724 clinicians)
Hospitals this clinician lists with Medicare, and groups they bill Medicare through (Care Compare). Affiliation doesn’t mean they see patients at every location.
Medicare patients and services
- Medicare patients, 2024
- 12
- Services billed
- 66
- Patients’ average age
- 13
| Service | Times | Patients |
|---|---|---|
| Established patient office or other outpatient visit, 40-54 minutes | 43 | 18 |
Medicare fee-for-service only. CMS leaves out services billed for fewer than 11 patients. These figures describe a practice’s Medicare work; they aren’t a measure of quality.
Medicare prescriptions
| Drug | Prescriptions |
|---|---|
| Amlodipine Besylate Other prescribers in Portland, OR | 21 |
| Cystaran (cysteamine hcl) | 14 |
Prescriptions filled under Medicare Part D, including refills. CMS leaves out drugs prescribed fewer than 11 times.
Payments from drug and device companies
In 2025, 1 companies reported 4 payments worth $9,500 in total to this clinician.
| Amgen Inc. | $9,500 |
|---|
| Compensation for services other than consulting (speaking, faculty) | $9,500 |
|---|
What the payments were for
| Company | What it was for | Amount |
|---|---|---|
| Amgen Inc. Sep 30, 2025 | Compensation for services other than consulting (speaking, faculty) PROCYSBI · Inflammation/Rare Disease | $2,375 |
| Amgen Inc. Aug 15, 2025 | Compensation for services other than consulting (speaking, faculty) PROCYSBI · Inflammation/Rare Disease | $2,375 |
| Amgen Inc. Oct 21, 2025 | Compensation for services other than consulting (speaking, faculty) PROCYSBI · Inflammation/Rare Disease | $2,375 |
| Amgen Inc. Feb 13, 2025 | Compensation for services other than consulting (speaking, faculty) PROCYSBI · Inflammation/Rare Disease | $2,375 |
Each payment as the company reported it, with the products it named. Meals are counted in the totals above but not listed one by one.
From CMS Open Payments. A payment is not evidence of wrongdoing; many are for consulting, teaching or meals. Clinicians can review and dispute their records with CMS.