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DR. SENZAN HSU M.D.
NPI 1184677940
Obstetrics & Gynecology in Hayward, CA

Active since May 19, 2006PECOS EnrolledAccepts Medicare Assignment
27225 CALAROGA AVE, HAYWARD, CA 94545(510) 342-0020(510) 342-0022 Get Directions Write a Review

NPPES record last updated: August 29, 2023. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Aug 29, 2023, Oct 26, 2020 (2 updates tracked since 2020).

About Dr. Senzan Hsu M.d. NPPES

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

DR. SENZAN HSU M.D. (NPI 1184677940) is an individual obstetrics & gynecology provider in Hayward, California, licensed in California (A70309) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS, maintains a secondary practice location in French Camp, and is a graduate of University Of Pittsburgh School Of Medicine (1996).

NPPES Registry Identity

NPI1184677940
Entity TypeIndividualMale
Primary Taxonomy207V00000X
Provider Legal NameDR. SENZAN HSUCredential: M.D.
Location Address27225 CALAROGA AVEHayward, CA 94545-4338
Mailing AddressPo Box 1020Stockton, CA 95201-3120 · (209) 468-6000 · Fax (209) 468-7042
Phone(510) 342-0020
Fax(510) 342-0022
Sole ProprietorNo
Medical School CMSUniversity Of Pittsburgh School Of MedicineGraduated 1996
Enumeration DateMay 19, 2006
Last NPPES UpdateAugust 29, 20232 updates tracked since enumeration
NPPES CertifiedAugust 29, 2023
✔ NPI 1184677940 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 · A70309
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.
27225 CALAROGA AVE, Hayward, CA 94545
Open in Google Maps ↗

Secondary Practice Location 1

Location 1500 W Hospital RdFrench Camp, CA 95231-9693 · Phone (209) 468-6184 · Fax (209) 468-6346

Other Identifiers 1

Medicaid1184677940CA

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

Dr. Senzan Hsu M.d. 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 ID6002868635
PECOS Enrollment IDI20060720000390
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 Senzan Hsu reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

County Of San Joaquin
48 mi
General Acute Care Hospital
500 W. HOSPITAL RD.
French Camp, CA 95231
  • Reassigned Medicare billing, California enrollment
  • 534 clinicians in this Medicare group
NPI 1801830583 (209) 468-6937
San Joaquin Faculty Medical Group
48 mi
Internal Medicine
500 HOSPITAL RD
French Camp, CA 95231
  • Reassigned Medicare billing, California enrollment
  • 512 clinicians in this Medicare group
NPI 1225063761 (209) 473-6555
Obhg California, P.C.
2,211 mi
Obstetrics & Gynecology
777 LOWNDES HILL RD BLDG 1
Greenville, SC 29607
  • Reassigned Medicare billing, California enrollment
  • Medicare enrollment name: Obhg California PC
  • 711 clinicians in this Medicare group
NPI 1215258892 (800) 967-2289

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 94545 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
$153.83 typical visit price
range $69.00 – $202.35
Typical copayment $38.45 (range $17.25 – $50.58)
Most-billed visit code 99204
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 10

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

DR. PAMELA DENISE SIMONS MD
Obstetrics & Gynecology
27225 CALAROGA AVE
HAYWARD, CA 94545
Alameda County (510) 342-0020
DR. MALCOLM JAY GARFINKLE M.D.
Surgery
27225 CALAROGA AVE
HAYWARD, CA 94545
Alameda County (510) 780-9148
ELENA LUO CHAN MD
Obstetrics & Gynecology
27225 CALAROGA AVE
HAYWARD, CA 94545
Alameda County (408) 259-5950
DAPHNE VB SINGH NP-C
Obstetrics & Gynecology
27225 CALAROGA AVE
HAYWARD, CA 94545
Alameda County (510) 342-0020
KENYA NUMAN M.D.
Obstetrics & Gynecology (Obstetrics)
27225 CALAROGA AVE
HAYWARD, CA 94545
Alameda County (510) 342-0020
MINJING WANG
Obstetrics & Gynecology (Gynecology)
27225 CALAROGA AVE
HAYWARD, CA 94545
Alameda County (510) 342-0020
F. RENE VAN CARR,M.D. & MARION R KRAMER,M.D. INC
Specialist
27225 CALAROGA AVE
HAYWARD, CA 94545
Alameda County (510) 783-0783
JAY GARFINKLE, M.D. A PROFESSIONAL CORPORATION
Surgery
27225 CALAROGA AVE
HAYWARD, CA 94545
Alameda County (510) 780-9148

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 Senzan Hsu's NPI number?

The NPI number for Senzan Hsu is 1184677940. It was assigned to this individual provider in the NPPES registry on May 19, 2006.

Where is Senzan Hsu located?

Senzan Hsu practices at 27225 Calaroga Ave, Hayward, CA 94545. The listed phone number is (510) 342-0020.

What is Senzan Hsu's specialty?

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

Is Senzan Hsu enrolled in Medicare?

Yes. Senzan Hsu 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 Senzan Hsu's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Senzan Hsu reassigns Medicare benefits to 3 organizations: County Of San Joaquin (French Camp, CA), San Joaquin Faculty Medical Group (French Camp, CA) and Obhg California, P.C. (Greenville, SC). 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 Senzan Hsu'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 Senzan Hsu was last updated on August 29, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.