Cassandra Niemi, MD
Gynecologic Oncology Physician · Portland, OR
Cassandra Niemi, MD is a gynecologic oncology physician with a practice address in Portland, Oregon, and NPI 1861781767, issued on Mar 31, 2011. Check the license on the Oregon Medical Board; the Medicare figures below come from public CMS files.
- Name
- Cassandra Niemi
- Credential
- MD
- Primary taxonomy
- Gynecologic Oncology Physician 207VX0201X
- Practice location
- 4805 NE Glisan St Ste 11N, Portland, OR 97213
- Phone
- (503) 215-2075
- Enumerated
- Mar 31, 2011
- Entity
- Type 1 · individual
Also registered at 4805 NE Glisan St Ste 11N
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Rhezarie Mae Agtarap, NP-CRegistered Nurse1023576659
- Hugo Akabane, M.D.Internal Medicine Physician1982010583
- Rebecca Armendariz, MDHospice and Palliative Medicine (Emergency Medicine) Physician1073773818
- Asher Bar-Nes Caldwell, ANP-BC, PMHNP-BCHospice Registered Nurse1699915355
- Richard Bell, MD, DDSOral and Maxillofacial Surgery (Dentist)1992704878
- Evelyn Brosnan, M.D.Student in an Organized Health Care Education/Training Program1497098941
Verify Cassandra Niemi in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOregon Medical BoardCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
1% more Medicare Part D claims than the average gynecologic oncology physician in 2024
200 Medicare Part D claims for 57 beneficiaries, against an average of 198 among the 1,016 providers of this specialty who prescribed in Part D. Brand-name drugs were 28% of claims. 25 claims were for opioids.
Most prescribed
- Eliquis27 claims
- Oxycodone Hcl19 claims
- Prochlorperazine Maleate17 claims
- Ondansetron Odt14 claims
- Estradiol12 claims
- Dexamethasone11 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's Medicare quality score for 2023: 87.8 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $375.63
4 payments, mostly food and beverage; the largest payer was Merck Sharp & Dohme LLC. The 833 providers of this specialty with any payment received $6,785.12 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
2 hospital and facility affiliations
- Providence Health And Services - OregonPortland, OR
- Providence Health And Services OregonPortland, OR
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Gynecologic Oncology Physician providers in Oregon
There are 19 gynecologic oncology physician records in Oregon.
Other gynecologic oncology physician records in Oregon
- Turgut Alagoz, MDClackamas, OR1336297266
- Emily Berry, M.D.Bend, OR1275707606
- Amanda Bruegl, M.D.Portland, OR1700080785
- Koenraad De Geest, MDPortland, OR1093702862
- Deborah Dotters, MDSpringfield, OR1740212232
- Audrey Garrett, M.D. , MPHEugene, OR1063437127
- Jim Gosewehr, M.D.Tigard, OR1629071592
- Breana HillPortland, OR1427553304
- Catherine John, MDClackamas, OR1316459340
- Lisa McCluskey, M.D.Portland, OR1780687566
Common questions
What is Cassandra Niemi, MD's NPI number?
Cassandra Niemi, MD's National Provider Identifier (NPI) is 1861781767, issued on Mar 31, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Cassandra Niemi, MD located?
The NPPES record lists a practice address at 4805 NE Glisan St Ste 11N, Portland, OR, 97213. Phone: (503) 215-2075. Providers update this record themselves, so call before visiting.
How can I verify Cassandra Niemi, MD's license?
Search the Oregon Medical Board at https://www.oregon.gov/OMB/Pages/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Cassandra Niemi, MD prescribe under Medicare Part D?
In 2024, Cassandra Niemi, MD had 200 Medicare Part D claims for 57 beneficiaries; the average among gynecologic oncology physician prescribers was 198. Part D covers Medicare prescriptions only.
What is Cassandra Niemi, MD's Medicare quality score?
The 2023 MIPS final score is 87.8 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.