1. Home
  2. Directory
  3. California
  4. Oakland
  5. Psychiatry Neurology
  6. NPI Profile

DIANE SI-SI WU MD
NPI 1033572599
Psychiatry & Neurology - Psychiatry in Oakland, CA

Active since April 01, 2016PECOS Enrolled
2940 SUMMIT ST STE 2D, OAKLAND, CA 94609(650) 600-9234 Get Directions Write a Review

NPPES record last updated: January 26, 2024. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Sep 17, 2020, Aug 10, 2020, Sep 19, 2017 and 2 more (5 updates tracked since 2016).

About Diane Si-si Wu Md NPPES

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

DIANE SI-SI WU MD (NPI 1033572599) is an individual psychiatry provider in Oakland, California, licensed in California (A150998) and active in the NPI registry since April 2016. She is enrolled in Medicare PECOS and is a graduate of Stanford University School Of Medicine (2016).

NPPES Registry Identity

NPI1033572599
Entity TypeIndividualFemale
Primary Taxonomy2084P0800X
Provider Legal NameDIANE SI-SI WUCredential: MD
Location Address2940 SUMMIT ST STE 2DOakland, CA 94609-3416
Mailing Address2940 Summit St Ste 2dOakland, CA 94609-3416 · (650) 600-9234
Phone(650) 600-9234
Sole ProprietorNo
Medical School CMSStanford University School Of MedicineGraduated 2016
Enumeration DateApril 1, 2016
Last NPPES UpdateJanuary 26, 20245 updates tracked since enumeration
NPPES CertifiedJanuary 26, 2024
✔ NPI 1033572599 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychiatry & Neurology · PsychiatryAllopathic & Osteopathic Physicians
Taxonomy Code2084P0800X
License✔ Licensed in CA · A150998
Definition
A Psychiatrist specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems.
2940 SUMMIT ST STE 2D, Oakland, CA 94609
Open in Google Maps ↗

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Diane Si-si Wu Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID9739419888
PECOS Enrollment IDI20191002003208
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 Diane Wu reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Empower Psychiatry, Medical Corporation
Same address
Psychiatry
2940 SUMMIT ST STE 2D
Oakland, CA 94609
  • Reassigned Medicare billing, California enrollment
NPI 1851168603 (650) 600-9234
Caminar
14 mi
Mental Health (Including Community Mental Health Center)
85 REINER ST
Daly City, CA 94014
  • Reassigned Medicare billing, California enrollment
  • 20 clinicians in this Medicare group
NPI 1457499550 (650) 994-3582

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 94609 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
$202.35 typical visit price
range $69.00 – $202.35
Typical copayment $50.58 (range $17.25 – $50.58)
Most-billed visit code 99205
Established Patient
$84.91 typical visit price
range $23.44 – $166.46
Typical copayment $21.22 (range $5.86 – $41.61)
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.

SEAN PATRICK CARR NBC-HWC
Health and Wellness Coach
2940 SUMMIT ST STE 2D
OAKLAND, CA 94609
Alameda County (925) 633-4828
SUSAN CARROLL TRAINEE, MA
Counselor (Mental Health)
2940 SUMMIT ST STE 2D
OAKLAND, CA 94609
Alameda County (510) 982-1000
ZOE ILANA DAVIS LMHC
Counselor (Mental Health)
2940 SUMMIT ST STE 2D
OAKLAND, CA 94609
Alameda County (510) 270-0110
GRACE LIU MA
Counselor (Mental Health)
2940 SUMMIT ST STE 2D
OAKLAND, CA 94609
Alameda County (510) 982-1000
MR. CLARENCE RAY THOMAS
Marriage & Family Therapist
2940 SUMMIT ST STE 2D
OAKLAND, CA 94609
Alameda County (855) 258-7728
DR. DANIELLE MAY HOWELL PSY.D.
Psychologist (Clinical)
2940 SUMMIT ST STE 2D
OAKLAND, CA 94609
Alameda County (510) 982-1000
KY MY TRIEU
Student in an Organized Health Care Education/Training Program
2940 SUMMIT ST STE 2D
OAKLAND, CA 94609
Alameda County (510) 982-1000
DR. AMELIA GABRIELLE JAYANTY PSYD
Psychologist (Clinical)
2940 SUMMIT ST STE 2D
OAKLAND, CA 94609
Alameda County (713) 859-7703

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 Diane Wu's NPI number?

The NPI number for Diane Wu is 1033572599. It was assigned to this individual provider in the NPPES registry on April 1, 2016.

Where is Diane Wu located?

Diane Wu practices at 2940 Summit St Ste 2D, Oakland, CA 94609. The listed phone number is (650) 600-9234.

What is Diane Wu's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.

Is Diane Wu enrolled in Medicare?

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

Which organizations bill Medicare for Diane Wu's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Diane Wu reassigns Medicare benefits to 2 organizations: Empower Psychiatry, Medical Corporation (Oakland, CA) and Caminar (Daly City, CA). 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 Diane 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 Diane Wu was last updated on January 26, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.