Quick answers
- Does Nima Motamedi accept Medicare assignment?
- Yes. Medicare's clinician data says Nima Motamedi 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 Nima Motamedi see?
- In 2024, CMS data shows 185 Original Medicare patients and 406 services for Nima Motamedi. This counts Original Medicare only and measures volume, not quality.
- What is Nima Motamedi's NPI number?
- 1639440381. 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 Nima Motamedi, 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 | 185 |
|---|---|
| Services billed to Medicare | 406 |
| Different services or procedures | 49 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Pathology examination of tissue using a microscope, intermediate complexity (88305)81 services
- Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)65 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)34 services
- Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)28 services
- Biopsy of large bowel using a flexible endoscope (45380)18 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 cholesterol72%
- High blood pressure68%
- Arthritis45%
- Depression30%
- Diabetes26%
- Ischemic heart disease24%
Hospitals where Nima Motamedi works
Medicare's Facility Affiliation Data lists Nima Motamedi 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.
- Legacy Meridian Park Medical CenterTualatin, OR · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 380089
- Providence Newberg Medical CenterNewberg, OR · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 380037
- Providence Willamette Falls Medical CenterOregon City, OR · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 380038
- Willamette Valley Medical CenterMcMinnville, OR · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 380071
Practice locations
Addresses where Nima Motamedi is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 6; the Medicare profile lists all.
- 1111 NE 99th AvePortland, OR 97220
- 1508 Division St, Suite 15Oregon City, OR 97045 (503) 692‑3750
- 19250 SW 90th AveTualatin, OR 97062 (503) 692‑3750
- 500n Columbia River HwySaint Helens, OR 97051 (503) 274‑4999
- 5050 NE Hoyt, Suite 655Portland, OR 97213 (503) 239‑6673
Group practices
Medicare enrollment lists Nima Motamedi as a member of this group (CMS data updated October 2, 2026).
- The Oregon Clinic, PC362 clinicians in the group
Specialties
- Gastroenterologyprimary
Other gastroenterologists in Portland
Clinicians with the same Medicare primary specialty in Portland, OR — not a recommendation.
Other clinicians in The Oregon Clinic, PC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Miami, Lm Miller School Of Medicine |
| Graduation year | 2011 (15 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) | 1639440381 |
| 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