Doctor profile · Federal record
Dr. Clayton Smiley, MD
Nephrology Physician (CMS: Nephrology) · Nephrology Physician · Portland, OR
- NPI 1679544431
- Accepts Medicare
- 28 yrs in practice
- Licensed in 2 states
- Male
- Group practice
- No sanctions
Practice & contact
Operates at 3 locations .
- Primary practice
-
1130 Nw 22Nd Avenue, Ste 640
Portland, OR 972102900
(503) 229-7976
fax (503) 274-4867 - Additional location
-
8050 Sw Warm Springs Street, Ste 150
Tualatin, OR 97062
(503) 692-7971
fax (503) 691-6837 - Additional location
-
925 Commercial Street Se, Ste 110
Salem, OR 97302
(503) 967-6670
fax (503) 585-2185 - Mailing address
-
Po Box 3068
Portland, OR 972083068
Credentials & registration
- NPI registered
- January 2006 — 20 yrs on file
- Profile last updated
- September 25, 2025
- Year of graduation
- 1998 — 28 yrs since
- Specialty taxonomy
- 207RN0300X — NUCC code
- State licenses (2)
- Oregon #MD27251 · Washington #MD00048170
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1679544431. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
2,658
Distinct HCPCS
10
Medicare allowed
$155,387
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
Q5106 |
Injection, epoetin alfa-epbx, biosimilar, (retacrit) (for non-esrd use), 1000 units | 1,154 | 25 | $8 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 267 | 196 | $101 | |
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 253 | 93 | $79 | |
90935 |
Hemodialysis procedure with physician evaluation | 109 | 57 | $71 | |
90961 |
Dialysis services, 2-3 physician visits per month (20 years or older) | 94 | 41 | $287 | |
85018 |
Blood count, hemoglobin | 87 | 27 | $2 | |
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 78 | 50 | $120 | |
99233 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 67 | 25 | $117 | |
96372 |
Injection of drug or substance under skin or into muscle | 60 | 26 | $15 | |
36415 |
Insertion of needle into vein for collection of blood sample | 56 | 39 | $8 |
In context: peer comparison
Among 24 peers in Portland Nephrology Physician, average services per provider: 83. This provider delivers 32× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
1,239
Patients
436
Total drug cost
$38,209
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Amlodipine Besylate | Generic | 146 | 55 | $1,218 |
| Losartan Potassium | Generic | 146 | 53 | $2,486 |
| Furosemide | Generic | 142 | 54 | $1,781 |
| Carvedilol | Generic | 105 | 41 | $1,282 |
| Lisinopril | Generic | 95 | 35 | $863 |
| Allopurinol | Generic | 85 | 20 | $1,485 |
| Olmesartan Medoxomil | Generic | 76 | 21 | $1,137 |
| Calcitriol | Generic | 70 | 28 | $1,267 |
| Prednisone | Generic | 68 | 22 | $792 |
| Torsemide | Generic | 68 | 26 | $1,853 |
Hospital affiliations
Frequently asked questions
What is Dr. Clayton Smiley's medical specialty?
Dr. Clayton Smiley practices Nephrology Physician in Portland, OR.
Where does Dr. Clayton Smiley practice?
Dr. Clayton Smiley practices at 1130 Nw 22Nd Avenue, Ste 640, Portland, OR 972102900. Office phone: 5032297976.
What is Dr. Clayton Smiley's NPI?
Dr. Clayton Smiley's National Provider Identifier (NPI) is 1679544431, issued by NPPES.
Does Dr. Clayton Smiley accept Medicare assignment?
Yes. Dr. Clayton Smiley accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Clayton Smiley commonly perform?
Top Medicare-reported procedures in 2023: Injection, epoetin alfa-epbx, biosimilar, (retacrit) (for non-esrd use), 1000 units (HCPCS Q5106); Established patient office or other outpatient visit (HCPCS 99214); Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232). Source: CMS Medicare Physician & Other Practitioners file.