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DAVID WEI OUYANG MD
NPI 1821043944
Obstetrics & Gynecology in Evanston, IL

Active since May 24, 2006PECOS EnrolledAccepts Medicare Assignment
2650 RIDGE AVE STE 1420, EVANSTON, IL 60201(847) 570-2860(847) 733-5087 Get Directions Write a Review

NPPES record last updated: July 30, 2026. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Jul 30, 2026, Feb 10, 2021, Oct 30, 2020 (3 updates tracked since 2020).

About David Wei Ouyang Md NPPES

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

DAVID WEI OUYANG MD (NPI 1821043944) is an individual obstetrics & gynecology provider in Evanston, Illinois, licensed in Illinois (036115621) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS, is affiliated with Northshore University Healthsystem - Evanston Hospital, and is a graduate of University Of Minnesota Medical School (1999).

NPPES Registry Identity

NPI1821043944
Entity TypeIndividualMale
Primary Taxonomy207V00000X
Provider Legal NameDAVID WEI OUYANGCredential: MD
Location Address2650 RIDGE AVE STE 1420Evanston, IL 60201-1700
Mailing Address2650 Ridge Ave Ste 1223Evanston, IL 60201-1700 · (847) 570-2040
Phone(847) 570-2860
Fax(847) 733-5087
Sole ProprietorNo
Medical School CMSUniversity Of Minnesota Medical SchoolGraduated 1999
Enumeration DateMay 24, 2006
Last NPPES UpdateJuly 30, 20263 updates tracked since enumeration
NPPES CertifiedJuly 30, 2026
✔ NPI 1821043944 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians
Taxonomy Code207V00000X
Licenses✔ Licensed in IL · 036115621✔ Licensed in MA · 217814
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.
Also ListedObstetrics & Gynecology · Maternal & Fetal MedicineTaxonomy 207VM0101X · License 036115621 (IL)
2650 RIDGE AVE STE 1420, Evanston, IL 60201
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Oscar Health.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

David Wei Ouyang 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 ID4082615505
PECOS Enrollment IDI20070126000290
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

3

Medicare enrollment records show David Ouyang reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Endeavor Health Medical Group
Same address
Anesthesiology
2650 RIDGE AVE, ANESTHESIOLOGY ROOM 3905
Evanston, IL 60201
  • Reassigned Medicare billing, Illinois enrollment
  • 4,841 clinicians in this Medicare group
NPI 1265695944 (847) 570-2760
Swedish Covenant Management Services, Inc
6.3 mi
Emergency Medicine
5140 N CALIFORNIA AVE
Chicago, IL 60625
  • Reassigned Medicare billing, Illinois enrollment
  • 350 clinicians in this Medicare group
NPI 1962049551 (847) 570-2040
Lutheran General Hospital
8.6 mi
Cardiovascular Disease
1775 DEMPSTER ST
Park Ridge, IL 60068
  • Reassigned Medicare billing, Illinois enrollment
  • Medicare enrollment name: Advocate Health And Hospitals Corporation
  • 4,870 clinicians in this Medicare group
NPI 1801809306 (847) 723-2210

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

Hospital Affiliations CMS Care Compare

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

Northshore University Healthsystem - Evanston Hospital

Acute Care Hospitals · Evanston, IL
5/5 CMS rating
OwnershipVoluntary non-profit - Other
CMS Certification Number140010
Location2650 Ridge AveEvanston, IL 60201 · Cook County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60201 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
$138.86 typical visit price
range $60.08 – $183.39
Typical copayment $34.71 (range $15.02 – $45.84)
Most-billed visit code 99204
Established Patient
$74.80 typical visit price
range $18.97 – $148.12
Typical copayment $18.70 (range $4.74 – $37.03)
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 5

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

AMELIA K RICHARDSON MS, CGC
Genetic Counselor, MS
2650 RIDGE AVE STE 1420
EVANSTON, IL 60201
Cook County (847) 570-2864
RACHEL FULL MS
Genetic Counselor, MS
2650 RIDGE AVE STE 1420
EVANSTON, IL 60201
Cook County (847) 570-2864
ALEXANDRIA WILLIAMS MD
Obstetrics & Gynecology (Maternal & Fetal Medicine)
2650 RIDGE AVE STE 1420
EVANSTON, IL 60201
Cook County (847) 570-2860
IAN A. GRABLE MD
Obstetrics & Gynecology (Maternal & Fetal Medicine)
2650 RIDGE AVE STE 1420
EVANSTON, IL 60201
Cook County (847) 570-2860
GINA M. RUSSANO APN-CNM
Advanced Practice Midwife
2650 RIDGE AVE STE 1420
EVANSTON, IL 60201
Cook County (847) 570-2860

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 David Ouyang's NPI number?

The NPI number for David Ouyang is 1821043944. It was assigned to this individual provider in the NPPES registry on May 24, 2006.

Where is David Ouyang located?

David Ouyang practices at 2650 Ridge Ave Ste 1420, Evanston, IL 60201. The listed phone number is (847) 570-2860.

What is David Ouyang's specialty?

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

Is David Ouyang enrolled in Medicare?

Yes. David Ouyang 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 David Ouyang's services?

According to the CMS Revalidation Reassignment List (October 2026 release), David Ouyang reassigns Medicare benefits to 3 organizations: Endeavor Health Medical Group (Evanston, IL), Swedish Covenant Management Services, Inc (Chicago, IL) and Lutheran General Hospital (Park Ridge, IL). 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 David Ouyang's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does David Ouyang accept?

Health plans from Oscar Health list David Ouyang 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.

Is David Ouyang affiliated with any hospitals?

According to CMS data, David Ouyang is affiliated with Northshore University Healthsystem - Evanston Hospital.

When was this NPI record last updated?

The NPPES record for David Ouyang was last updated on July 30, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.