CASSANDRA MICHELLE NIEMI MD
NPI 1861781767
Obstetrics & Gynecology - Gynecologic Oncology in Portland, OR

Q: What is Cassandra Niemi's NPI number?

The NPI number for Cassandra Niemi is 1861781767. It was assigned to this individual provider in the NPPES registry on March 31, 2011.

Q: What is Cassandra Niemi's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology, specializing in Gynecologic Oncology, with taxonomy code 207VX0201X.

Q: When was this NPI record last updated?

The NPPES record for Cassandra Niemi was last updated on March 22, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since March 31, 2011PECOS EnrolledAccepts Medicare Assignment

87.76/100

CMS Quality Rating

4805 NE GLISAN ST STE 11N, PORTLAND, OR 97213(503) 215-2075 Get Directions Write a Review

NPPES record last updated: March 22, 2021. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Mar 22, 2021, Jan 15, 2021, Dec 18, 2018 and 3 more (6 updates tracked since 2015).

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About Cassandra Michelle Niemi Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

CASSANDRA MICHELLE NIEMI MD (NPI 1861781767) is an individual gynecologic oncology provider in Portland, Oregon, licensed in Oregon (MD186977) and active in the NPI registry since March 2011. She is enrolled in Medicare PECOS, is affiliated with Providence St Vincent Medical Center, and maintains a secondary practice location in Portland.

NPPES Registry Identity

NPI1861781767

Entity TypeIndividualFemale

Primary Taxonomy207VX0201X

Provider Legal NameCASSANDRA MICHELLE NIEMICredential: MD

Location Address4805 NE GLISAN ST STE 11NPortland, OR 97213-2933

Mailing AddressPo Box 3158Portland, OR 97208-3158 · (503) 215-6494

Phone(503) 215-2075

Sole ProprietorNo

Medical School CMSOtherGraduated 2011

Enumeration DateMarch 31, 2011

Last NPPES UpdateMarch 22, 20216 updates tracked since enumeration

NPPES CertifiedMarch 22, 2021

✔ NPI 1861781767 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & Gynecology · Gynecologic OncologyAllopathic & Osteopathic Physicians

Taxonomy Code207VX0201X

License✔ Licensed in OR · MD186977

Definition

An obstetrician/gynecologist who provides consultation and comprehensive management of patients with gynecologic cancer, including those diagnostic and therapeutic procedures necessary for the total care of the patient with gynecologic cancer and resulting complications.

4805 NE GLISAN ST STE 11N, Portland, OR 97213

Open in Google Maps ↗

Secondary Practice Location 1

Location 19555 SW Barnes Rd Ste 150Portland, OR 97225-6691 · Phone (503) 297-7403 · Fax (503) 384-9908

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Kaiser Permanente, Providence Health Plan.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Cassandra Michelle Niemi Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID3476708470

PECOS Enrollment IDI20180807003952

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

Medicare enrollment records show Cassandra Niemi reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Providence Health & Services - Oregon

Same address

Obstetrics & Gynecology

4805 NE GLISAN ST STE 11N
Portland, OR 97213

Reassigned Medicare billing, Oregon enrollment
1,501 clinicians in this Medicare group

NPI 1013217975 (503) 215-2075

Providence Health & Services - Oregon

Same address

General Acute Care Hospital

4805 NE GLISAN ST
Portland, OR 97213

Reassigned Medicare billing, Oregon enrollment
676 clinicians in this Medicare group

NPI 1003991845 (503) 451-3000

Legacy Clinics LLC

4.1 mi

Clinic/Center

1130 NW 22ND AVE STE 220
Portland, OR 97210

Reassigned Medicare billing, Oregon enrollment
1,248 clinicians in this Medicare group

NPI 1902827272 (503) 413-2901

Northwest Cancer Specialists PC

7.9 mi

Hematology & Oncology

1498 SE TECH CENTER PL, SUITE 240
Vancouver, WA 98683

Reassigned Medicare billing, Oregon and Washington enrollments
57 clinicians in this Medicare group

NPI 1407828114 (360) 597-1300

Legacy Salmon Creek Hospital

13 mi

Clinic/Center

2211 NE 139TH ST
Vancouver, WA 98686

Reassigned Medicare billing, Washington enrollment
754 clinicians in this Medicare group

NPI 1356357784 (360) 487-2878

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 4

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

58 services15 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

33 services21 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

33 services14 patients

New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205

This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.

11 services11 patients

Hospital Affiliations CMS Care Compare 3

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Providence St Vincent Medical Center

Acute Care Hospitals · Portland, OR

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number380004

Location9205 SW Barnes RoadPortland, OR 97225 · Washington County

Emergency services Birthing friendly

Providence Willamette Falls Medical Center

Acute Care Hospitals · Oregon City, OR

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number380038

Location1500 Division StreetOregon City, OR 97045 · Clackamas County

Emergency services Birthing friendly

Providence Portland Medical Center

Acute Care Hospitals · Portland, OR

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number380061

Location4805 NE Glisan StreetPortland, OR 97213 · Multnomah County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 97213 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$176.88 typical visit price

range $58.99 – $176.88

Typical copayment $44.22 (range $14.74 – $44.22)

Most-billed visit code 99205

Established Patient

$103.51 typical visit price

range $19.32 – $144.79

Typical copayment $25.87 (range $4.83 – $36.19)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

87.76/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored as part of a group practice

Quality

85.17

Promoting Interoperability

100

Improvement Activities

Cost

74.03

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

PROVIDENCE HEALTH & SERVICES - OREGON

Obstetrics & Gynecology