Doctor profile · Federal record
Dr. Cassandra Niemi, MD
Gynecologic Oncology Physician (CMS: Obstetrics/Gynecology) · Portland, OR
- NPI 1861781767
- Accepts Medicare
- MIPS 87.8 / 100 · 2023
- 15 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
4805 Ne Glisan St Ste 11N
Portland, OR 972132933
(503) 215-2075 - Additional location
-
9555 Sw Barnes RD Ste 150
Portland, OR 972256691
(503) 297-7403
fax (503) 384-9908 - Mailing address
-
Po Box 3158
Portland, OR 972083158
Credentials & registration
- NPI registered
- March 2011 — 15 yrs on file
- Profile last updated
- March 22, 2021
- Year of graduation
- 2011 — 15 yrs since
- Specialty taxonomy
- 207VX0201X — NUCC code
- State license (1)
- Oregon #MD186977
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1861781767. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
67
Distinct HCPCS
3
Medicare allowed
$5,537
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 31 | 23 | $66 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 22 | 13 | $99 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 14 | 11 | $94 |
In context: peer comparison
Among 7 peers in Portland Gynecologic Oncology Physician, average services per provider: 670. This provider delivers 0.1× the peer median.Open Payments
Industry payments received
All-time total
$376
Transactions
4
Manufacturers
2
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Merck Sharp & Dohme LLC | 2 | $241.45 | |
| AstraZeneca Pharmaceuticals Lp | 2 | $134.18 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
79
Patients
14
Total drug cost
$15,758
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Prochlorperazine Maleate | Generic | 27 | 14 | $647 |
| Estradiol | Generic | 15 | 0 | $181 |
| Eliquis (Apixaban) | Brand | 13 | 0 | $7,018 |
| Megestrol Acetate | Generic | 13 | 0 | $737 |
| Enoxaparin Sodium | Generic | 11 | 0 | $7,175 |
Hospital affiliations
Frequently asked questions
What is Dr. Cassandra Niemi's medical specialty?
Dr. Cassandra Niemi practices Gynecologic Oncology Physician in Portland, OR.
Where does Dr. Cassandra Niemi practice?
Dr. Cassandra Niemi practices at 4805 Ne Glisan St Ste 11N, Portland, OR 972132933. Office phone: 5032152075.
What is Dr. Cassandra Niemi's NPI?
Dr. Cassandra Niemi's National Provider Identifier (NPI) is 1861781767, issued by NPPES.
Does Dr. Cassandra Niemi accept Medicare assignment?
Yes. Dr. Cassandra Niemi accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Cassandra Niemi commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99213); Established patient office or other outpatient visit (HCPCS 99214); Established patient office or other outpatient visit (HCPCS 99213). Source: CMS Medicare Physician & Other Practitioners file.