Doctor profile · Federal record
Dr. Mark Nguyen, MD
Nephrology Physician (CMS: Nephrology) · Nephrology Physician · Portland, OR
- NPI 1427348150
- Accepts Medicare
- 15 yrs in practice
- Licensed in 2 states
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
1130 Nw 22Nd Ave Ste 640
Portland, OR 972102993
(503) 229-7976
fax (503) 274-4867 - Mailing address
-
Po Box 3068
Portland, OR 972083068
Credentials & registration
- NPI registered
- April 2011 — 15 yrs on file
- Profile last updated
- September 25, 2025
- Year of graduation
- 2011 — 15 yrs since
- Specialty taxonomy
- 207RN0300X — NUCC code
- State licenses (2)
- Oregon #MD183639 · Washington #MD60742774
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1427348150. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
1,165
Distinct HCPCS
10
Medicare allowed
$164,608
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 238 | 123 | $102 | |
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 189 | 70 | $79 | |
90935 |
Hemodialysis procedure with physician evaluation | 136 | 63 | $71 | |
90960 |
Dialysis services, 4 or more physician visits per month (20 years or older) | 136 | 26 | $359 | |
99233 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 83 | 37 | $119 | |
90961 |
Dialysis services, 2-3 physician visits per month (20 years or older) | 80 | 38 | $294 | |
90966 |
Home dialysis services per month (20 years or older) | 56 | 12 | $299 | |
99221 |
Initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 minutes | 52 | 45 | $82 | |
90945 |
Dialysis procedure including 1 evaluation | 37 | 15 | $86 | |
36415 |
Insertion of needle into vein for collection of blood sample | 29 | 17 | $8 |
In context: peer comparison
Among 24 peers in Portland Nephrology Physician, average services per provider: 83. This provider delivers 14× the peer median.Open Payments
Industry payments received
All-time total
$109
Transactions
6
Manufacturers
3
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Otsuka America Pharmaceutical, INC. | 3 | $58.27 | |
| Bayer Healthcare Pharmaceuticals INC. | 2 | $40.33 | |
| Travere Therapeutics, INC. | 1 | $9.98 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
861
Patients
322
Total drug cost
$65,502
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Amlodipine Besylate | Generic | 133 | 54 | $1,294 |
| Losartan Potassium | Generic | 88 | 36 | $1,342 |
| Furosemide | Generic | 83 | 30 | $613 |
| Lisinopril | Generic | 77 | 24 | $761 |
| Carvedilol | Generic | 66 | 23 | $1,030 |
| Tamsulosin Hcl | Generic | 53 | 17 | $851 |
| Prednisone | Generic | 49 | 15 | $708 |
| Sevelamer Carbonate | Generic | 47 | 22 | $8,551 |
| Gabapentin | Generic | 46 | 15 | $443 |
| Atorvastatin Calcium | Generic | 43 | 17 | $759 |
Hospital affiliations
Frequently asked questions
What is Dr. Mark Nguyen's medical specialty?
Dr. Mark Nguyen practices Nephrology Physician in Portland, OR.
Where does Dr. Mark Nguyen practice?
Dr. Mark Nguyen practices at 1130 Nw 22Nd Ave Ste 640, Portland, OR 972102993. Office phone: 5032297976.
What is Dr. Mark Nguyen's NPI?
Dr. Mark Nguyen's National Provider Identifier (NPI) is 1427348150, issued by NPPES.
Does Dr. Mark Nguyen accept Medicare assignment?
Yes. Dr. Mark Nguyen accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Mark Nguyen commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232); Hemodialysis procedure with physician evaluation (HCPCS 90935). Source: CMS Medicare Physician & Other Practitioners file.