CASSANDRA MICHELLE NIEMI (MD) – Gynecologic Oncology Physician, NPI 1861781767
Gynecologic Oncology Physician
Main info
Doctor Profile
Contacts
Profile Insights
NPPES metrics only — not quality of care.
632 OBSTETRICS/GYNECOLOGY in OR
Provider Addresses for CASSANDRA MICHELLE NIEMI (MD)
9555 SW Barnes Rd Ste 150
Portland, OR 972256691
Phone: (503) 297-7403
Fax: (503) 384-9908
Type: Location
1498 SE TECH CENTER PL STE 240
VANCOUVER, WA 986835508
Phone:
Type: Mailing
9555 SW BARNES RD STE 150
PORTLAND, OR 972256691
Phone: (503) 297-7403
Fax: (503) 384-9908
Type: Location
PO BOX 3158
PORTLAND, OR 972083158
Phone: (503) 215-6494
Type: Mailing
4805 NE GLISAN ST STE 11N
PORTLAND, OR 972132933
Phone: (503) 215-2075
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 6 Open Payments records for all available years, with a total value of $621.
Total Amount is formed as General ($621) + Research ($0) + Ownership ($0) = $621.
Last reported payment date: 2024-11-19 • Largest payer in this snapshot: AstraZeneca Pharmaceuticals LP ($259).
Total Amount
$621
General + Research + Ownership
Payments
6
Total payment records
General Amount
$621
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-11-19
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| AstraZeneca Pharmaceuticals LP | $259 |
| Merck Sharp & Dohme LLC | $241 |
| Eisai Inc. | $120 |
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2018-08-07
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking 2 Medicare enrollment records; no due dates published yet.
Enrollment records
2
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20180807003894 | I | Gynecological Oncology | WA | TBD |
| I20180807003952 | I | Obstetrics/Gynecology | OR | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 45 | 34 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 22 | 13 | $0 |
Insurance plans in this area (ZIP 97225)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Internal Medicine | OR | |
| Physician Assistant | OR | |
| - | OR | |
| N E U R O L O G Y | OR | |
| Nurse Practitioner | OR | |
| Infectious Disease, Internal Medicine | OR | |
| Thoracic Surgery | OR | |
| Nurse Practitioner | OR | |
| Physician Assistant | WA | |
| Clinical Psychologist | OR |
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