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JOANNA ZHOU M.D., MPH
NPI 1497118905
Obstetrics & Gynecology in Seattle, WA

Active since April 01, 2016PECOS EnrolledAccepts Medicare Assignment
904 7TH AVE, SEATTLE, WA 98104(206) 860-4541(206) 860-4587 Get Directions Write a Review

NPPES record last updated: May 6, 2026. Verified against the NPPES registry weekly; last sync: November 08, 2026.

Record update history: May 6, 2026, Jun 9, 2025, May 30, 2025 and 3 more (6 updates tracked since 2016).

About Joanna Zhou M.d., Mph NPPES

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

JOANNA ZHOU M.D., MPH (NPI 1497118905) is an individual obstetrics & gynecology provider in Seattle, Washington, licensed in Washington (MD61073713) and active in the NPI registry since April 2016. She is enrolled in Medicare PECOS and is a graduate of Other (2016).

NPPES Registry Identity

NPI1497118905
Entity TypeIndividualFemale
Primary Taxonomy207V00000X
Provider Legal NameJOANNA ZHOUCredential: M.D., MPH
Location Address904 7TH AVESeattle, WA 98104-1132
Mailing Address7600 Evergreen WayEverett, WA 98203-6421 · (206) 860-5414
Phone(206) 860-4541
Fax(206) 860-4587
Sole ProprietorNo
Medical School CMSOtherGraduated 2016
Enumeration DateApril 1, 2016
Last NPPES UpdateMay 6, 20266 updates tracked since enumeration
NPPES CertifiedMay 6, 2026
✔ NPI 1497118905 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians
Taxonomy Code207V00000X
License✔ Licensed in WA · MD61073713
Definition
An obstetrician/gynecologist possesses special knowledge, skills and professional capability in the medical and surgical care of the female reproductive system and associated disorders. This physician serves as a consultant to other physicians and as a primary physician for women.
904 7TH AVE, Seattle, WA 98104
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Premera Blue Cross Blue Shield of Alaska.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

Joanna Zhou M.d., Mph 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 ID5193015030
PECOS Enrollment IDI20201001001900
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

2

Medicare enrollment records show Joanna Zhou reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

The Polyclinic
0.4 mi
Radiation Oncology
1225 MADISON ST
Seattle, WA 98104
  • Reassigned Medicare billing, Washington enrollment
  • 911 clinicians in this Medicare group
NPI 1962824219 (206) 386-3195
Optum Care Washington PLLC
25 mi
Multi-Specialty
3901 HOYT AVE
Everett, WA 98201
  • Reassigned Medicare billing, Washington enrollment
  • 1,285 clinicians in this Medicare group
NPI 1831186766 (425) 259-0966

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

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 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.
16 services14 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 98104 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
$143.76 typical visit price
range $63.67 – $189.37
Typical copayment $35.94 (range $15.91 – $47.34)
Most-billed visit code 99204
Established Patient
$78.74 typical visit price
range $21.12 – $155.00
Typical copayment $19.68 (range $5.28 – $38.75)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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.

LAURA MORRISON MD
Dermatology
904 7TH AVE
SEATTLE, WA 98104
King County (206) 860-4691
DR. JOSEPH W DAVIS M.D.
Internal Medicine
904 7TH AVE
SEATTLE, WA 98104
King County (206) 860-5574
MANDY WARNER MATTA PA-C
Physician Assistant (Surgical)
904 7TH AVE
SEATTLE, WA 98104
King County (206) 329-1760
ANTONIUS MULIA M.D.
Internal Medicine
904 7TH AVE
SEATTLE, WA 98104
King County (206) 329-1760
KATHLEEN MAKIELSKI M.D.
Otolaryngology
904 7TH AVE
SEATTLE, WA 98104
King County (206) 329-1760
DR. XIANGPING REN MD
Physical Medicine & Rehabilitation (Pain Medicine)
904 7TH AVE
SEATTLE, WA 98104
King County (206) 329-1760
ANNA H STEPCZYNSKI M.D.
Internal Medicine
904 7TH AVE
SEATTLE, WA 98104
King County (206) 860-5574
NEHA MITRAGOTRI
Pediatrics
904 7TH AVE
SEATTLE, WA 98104
King County (206) 292-2249

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Joanna Zhou's NPI number?

The NPI number for Joanna Zhou is 1497118905. It was assigned to this individual provider in the NPPES registry on April 1, 2016.

Where is Joanna Zhou located?

Joanna Zhou practices at 904 7th Ave, Seattle, WA 98104. The listed phone number is (206) 860-4541.

What is Joanna Zhou's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.

Is Joanna Zhou enrolled in Medicare?

Yes. Joanna Zhou is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Joanna Zhou's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Joanna Zhou reassigns Medicare benefits to 2 organizations: The Polyclinic (Seattle, WA) and Optum Care Washington PLLC (Everett, WA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Joanna Zhou's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Joanna Zhou accept?

Health plans from Premera Blue Cross Blue Shield of Alaska list Joanna Zhou as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Joanna Zhou was last updated on May 6, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 months 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.