Clayton Smiley, MD
NPI 1679544431 · Nephrology Physician · Portland, OR
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Clayton Smiley, MD is a Nephrology Physician provider in Portland, OR (NPI 1679544431).
Provider details
- NPI number
- 1679544431
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- MD00048170 (WA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
1,414 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| 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'SG2211 | 318 | $16 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 281 | $107 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 165 | $78 |
| Dialysis Services, 2-3 Physician Visits Per Month (20 Years Or Older)90961 | 133 | $281 |
| Dialysis Services, 4 Or More Physician Visits Per Month (20 Years Or Older)90960 | 85 | $350 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 42 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 159 | 65 |
| Olmesartan Medoxomil | 151 | 53 |
| Losartan Potassium | 147 | 52 |
| Furosemide | 122 | 46 |
| Carvedilol | 99 | 35 |
| Lisinopril | 89 | 32 |
| Torsemide | 87 | 35 |
| Prednisone |
Practice location
Mailing address
Additional practice locations (2)
- 925 Commercial Street Se, Ste 110Salem, OR 97302Phone: (503) 967-6670Fax: (503) 585-2185
- 8050 Sw Warm Springs Street, Ste 150Tualatin, OR 97062Phone: (503) 692-7971Fax: (503) 691-6837
Registry dates
- Enumerated
- 2006-01-30
- Last updated
- 2025-09-25
- Certified
- 2025-09-25
Frequently asked questions
- What is Clayton Smiley's NPI number?
- Clayton Smiley's National Provider Identifier (NPI) is 1679544431, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Clayton Smiley's specialty?
- Clayton Smiley is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Clayton Smiley located?
- Clayton Smiley's practice location on file with NPPES is 1130 Nw 22nd Avenue, Ste 640, Portland, OR 97210-2900.
- What is Clayton Smiley's phone number?
- The practice phone number listed in the NPPES registry for Clayton Smiley is (503) 229-7976.
- Does Clayton Smiley accept Medicare?
- Clayton Smiley is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Clayton Smiley's NPI active?
- Yes — Clayton Smiley's NPI (1679544431) is active in the NPPES registry as of the last update on 2025-09-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.