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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

ELLEN TSAY
NPI 1194354951
Orthopaedic Surgery in Vacaville, CA

Active since April 03, 2020PECOS Enrolled
1 QUALITY DR, VACAVILLE, CA 95688(707) 651-5502 Get Directions Write a Review

NPPES record last updated: September 22, 2026. Verified against the NPPES registry weekly; last sync: October 04, 2026.

Record update history: Sep 22, 2026, Oct 10, 2025, Apr 3, 2020 (3 updates tracked since 2020).

About Ellen Tsay NPPES

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

ELLEN TSAY (NPI 1194354951) is an individual orthopaedic surgery provider in Vacaville, California, licensed in Pennsylvania (MD487615) and active in the NPI registry since April 2020. She is enrolled in Medicare PECOS, is affiliated with Bryn Mawr Hospital, and is a graduate of Other (2020).

NPPES Registry Identity

NPI1194354951
Entity TypeIndividualFemale
Primary Taxonomy207X00000X
Provider Legal NameELLEN TSAY
Location Address1 QUALITY DRVacaville, CA 95688-9494
Mailing Address1 Quality DrVacaville, CA 95688-9494 · (707) 651-5502
Phone(707) 651-5502
Sole ProprietorYes
Medical School CMSOtherGraduated 2020
Enumeration DateApril 3, 2020
Last NPPES UpdateSeptember 22, 20263 updates tracked since enumeration
NPPES CertifiedSeptember 22, 2026
✔ NPI 1194354951 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOrthopaedic SurgeryAllopathic & Osteopathic Physicians
Taxonomy Code207X00000X
Licenses✔ Licensed in PA · MD487615✔ Licensed in NJ · 25MA12498400
Definition
An orthopaedic surgeon is trained in the preservation, investigation and restoration of the form and function of the extremities, spine and associated structures by medical, surgical and physical means. An orthopaedic surgeon is involved with the care of patients whose musculoskeletal problems include congenital deformities, trauma, infections, tumors, metabolic disturbances of the musculoskeletal system, deformities, injuries and degenerative diseases of the spine, hands, feet, knee, hip, shoulder and elbow in children and adults. An orthopaedic surgeon is also concerned with primary and secondary muscular problems and the effects of central or peripheral nervous system lesions of the musculoskeletal system.
1 QUALITY DR, Vacaville, CA 95688
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Ellen Tsay 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 ID6901211432
PECOS Enrollment IDI20250714004307
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.

Hospital Affiliations CMS Care Compare 5

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

Bryn Mawr Hospital

Acute Care Hospitals · Bryn Mawr, PA
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number390139
Location130 South Bryn Mawr AveBryn Mawr, PA 19010 · Montgomery County
Emergency services Birthing friendly

Thomas Jefferson University Hospital

Acute Care Hospitals · Philadelphia, PA
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number390174
Location111 South 11th StreetPhiladelphia, PA 19107 · Philadelphia County
Emergency services Birthing friendly

Abington Memorial Hospital

Acute Care Hospitals · Abington, PA
2/5 CMS rating
OwnershipProprietary
CMS Certification Number390231
Location1200 Old York RoadAbington, PA 19001 · Montgomery County
Emergency services Birthing friendly

Rothman Orthopaedic Specialty Hospital

Acute Care Hospitals · Bensalem, PA
OwnershipProprietary
CMS Certification Number390322
Location3300 Tillman DriveBensalem, PA 19020 · Bucks County

Physicians Care Surgical Hospital

Acute Care Hospitals · Royersford, PA
OwnershipPhysician
CMS Certification Number390324
Location454 Enterprise DriveRoyersford, PA 19468 · Montgomery County

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 95688 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
$98.85 typical visit price
range $65.02 – $191.95
Typical copayment $24.71 (range $16.25 – $47.98)
Most-billed visit code 99203
Established Patient
$80.24 typical visit price
range $21.86 – $157.69
Typical copayment $20.06 (range $5.46 – $39.42)
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.

DONALD BRADNER WARD CRNA
Nurse Anesthetist, Certified Registered
1 QUALITY DR
VACAVILLE, CA 95688
Solano County (707) 624-4207
MS. ELAINE GARDNER PT
Physical Therapist
1 QUALITY DR
VACAVILLE, CA 95688
Solano County (707) 624-4000
SAMANTHA LYNN TORRES-RAMONDO
Respiratory Therapist, Registered
1 QUALITY DR
VACAVILLE, CA 95688
Solano County (707) 624-1850
WES R WILTSE DO
Physical Medicine & Rehabilitation
1 QUALITY DR, B36
VACAVILLE, CA 95688
Solano County (707) 684-3840
MRS. NATALIA FELDMAN OTR/L
Occupational Therapist
1 QUALITY DR
VACAVILLE, CA 95688
Solano County (707) 624-4000
DR. TERAH HENNICK MD
Orthopaedic Surgery
1 QUALITY DR
VACAVILLE, CA 95688
Solano County (707) 624-4000
ANKUR NITIN KAPADIA MD
Family Medicine
1 QUALITY DR
VACAVILLE, CA 95688
Solano County (707) 624-4000
KAISER PERMANENTE
Clinic/Center (Adult Mental Health)
1 QUALITY DR
VACAVILLE, CA 95688
Solano County (707) 624-2600

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 Ellen Tsay's NPI number?

The NPI number for Ellen Tsay is 1194354951. It was assigned to this individual provider in the NPPES registry on April 3, 2020.

Where is Ellen Tsay located?

Ellen Tsay practices at 1 Quality Dr, Vacaville, CA 95688. The listed phone number is (707) 651-5502.

What is Ellen Tsay's specialty?

The primary specialty registered for this NPI is Orthopaedic Surgery with taxonomy code 207X00000X.

Is Ellen Tsay enrolled in Medicare?

Yes. Ellen Tsay 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.

Is Ellen Tsay affiliated with any hospitals?

According to CMS data, Ellen Tsay is affiliated with Bryn Mawr Hospital, Thomas Jefferson University Hospital, Abington Memorial Hospital, Rothman Orthopaedic Specialty Hospital and Physicians Care Surgical Hospital.

When was this NPI record last updated?

The NPPES record for Ellen Tsay was last updated on September 22, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 days 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.