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MARK WEN JEN WU MD
NPI 1245457712
Obstetrics & Gynecology in Baldwin Park, CA

Active since April 19, 2007PECOS Enrolled
1011 BALDWIN PARK BLVD, BALDWIN PARK, CA 91706(626) 851-1011 Get Directions Write a Review

NPPES record last updated: December 6, 2021. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Mark Wen Jen Wu Md NPPES

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

MARK WEN JEN WU MD (NPI 1245457712) is an individual obstetrics & gynecology provider in Baldwin Park, California, licensed in California (A90198) and active in the NPI registry since April 2007. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1245457712
Entity TypeIndividualMale
Primary Taxonomy207V00000X
Provider Legal NameMARK WEN JEN WUCredential: MD
Location Address1011 BALDWIN PARK BLVDBaldwin Park, CA 91706-5806
Mailing Address1011 Baldwin Park BlvdBaldwin Park, CA 91706-5806 · (626) 851-1011
Phone(626) 851-1011
Sole ProprietorNo
Enumeration DateApril 19, 2007
Last NPPES UpdateDecember 6, 2021
✔ NPI 1245457712 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians
Taxonomy Code207V00000X
License✔ Licensed in CA · A90198
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.
1011 BALDWIN PARK BLVD, Baldwin Park, CA 91706
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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Mark Wen Jen Wu Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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 Reassignment

Medicare enrollment records show Mark Wu reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Southern California Permanente Medical Group
Same address
Health Maintenance Organization
1011 BALDWIN PARK BLVD
Baldwin Park, CA 91706
  • Reassigned Medicare billing, California enrollment
  • Also billed through NPI 1396287082 (California)
  • 13,921 clinicians in this Medicare group
NPI 1770515280 (626) 851-1011

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 91706 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
$142.39 typical visit price
range $62.96 – $187.60
Typical copayment $35.59 (range $15.74 – $46.90)
Most-billed visit code 99204
Established Patient
$77.96 typical visit price
range $20.84 – $153.61
Typical copayment $19.49 (range $5.21 – $38.40)
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.

BRETT ALLEN PROVENCE D.O.
Hospitalist
1011 BALDWIN PARK BLVD, 4 EAST HOSPITALIST OFFICE
BALDWIN PARK, CA 91706
Los Angeles County (626) 851-1011
VERONICA CHIU TSANG RRT
Respiratory Therapist, Registered
1011 BALDWIN PARK BLVD
BALDWIN PARK, CA 91706
Los Angeles County (626) 851-7245
DANIEL CHU MD
Family Medicine
1011 BALDWIN PARK BLVD
BALDWIN PARK, CA 91706
Los Angeles County (833) 574-2273
JULIAN REED WOODS MD
Emergency Medicine
1011 BALDWIN PARK BLVD
BALDWIN PARK, CA 91706
Los Angeles County (626) 851-1011
HLA H. KYI MD
Pediatrics
1011 BALDWIN PARK BLVD
BALDWIN PARK, CA 91706
Los Angeles County (626) 851-1011
YU-CHIEN KUO MD
Family Medicine
1011 BALDWIN PARK BLVD
BALDWIN PARK, CA 91706
Los Angeles County (626) 851-1011
CHRISTINE YI-JING CHEN-HSU MD
Physical Medicine & Rehabilitation
1011 BALDWIN PARK BLVD
BALDWIN PARK, CA 91706
Los Angeles County (626) 851-1011
DAVID OREN DEWITT PA
Physician Assistant
1011 BALDWIN PARK BLVD
BALDWIN PARK, CA 91706
Los Angeles County (626) 851-1011

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 Mark Wu's NPI number?

The NPI number for Mark Wu is 1245457712. It was assigned to this individual provider in the NPPES registry on April 19, 2007.

Where is Mark Wu located?

Mark Wu practices at 1011 Baldwin Park Blvd, Baldwin Park, CA 91706. The listed phone number is (626) 851-1011.

What is Mark Wu's specialty?

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

Is Mark Wu enrolled in Medicare?

Yes. Mark Wu is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Mark Wu's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mark Wu reassigns Medicare benefits to Southern California Permanente Medical Group (Baldwin Park, CA). The 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 Mark Wu's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Mark Wu was last updated on December 6, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.