WINONA TAN M.D.
NPI 1003904350
Obstetrics & Gynecology in Palo Alto, CA

Active since October 11, 2006PECOS EnrolledAccepts Medicare Assignment
795 EL CAMINO REAL, PALO ALTO, CA 94301(650) 853-2917 Get Directions Write a Review

NPPES record last updated: March 4, 2020. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Winona Tan M.d. NPPES

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

WINONA TAN M.D. (NPI 1003904350) is an individual obstetrics & gynecology provider in Palo Alto, California, licensed in California (G80084) and active in the NPI registry since October 2006. She is enrolled in Medicare PECOS and is a graduate of University Of California, San Francisco School Of Medicine (1993).

NPPES Registry Identity

NPI1003904350
Entity TypeIndividualFemale
Primary Taxonomy207V00000X
Provider Legal NameWINONA TANCredential: M.D.
Location Address795 EL CAMINO REALPalo Alto, CA 94301-2302
Mailing Address325 Distel CirLos Altos, CA 94022-1408 · (650) 853-2917
Sole ProprietorNo
Medical School CMSUniversity Of California, San Francisco School Of MedicineGraduated 1993
Enumeration DateOctober 11, 2006
Last NPPES UpdateMarch 4, 2020
NPPES CertifiedMarch 4, 2020
NPI 1003904350 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 · G80084
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.

795 EL CAMINO REAL, Palo Alto, CA 94301

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

Winona Tan 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 ID4385703305
PECOS Enrollment IDI20081105000896
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.

Areas of Expertise CMS Part B claims 2

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Cervical or vaginal cancer screening; pelvic and clinical breast examination G0101
This procedure involves checking for health issues in the lower abdomen and chest area. It helps identify early signs of certain conditions, increasing the chance for successful treatment. It's a routine check-up that's important for maintaining good health.
17 services17 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
13 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94301 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
$156.67 typical visit price
range $70.37 – $206.04
Typical copayment $39.16 (range $17.59 – $51.51)
Most-billed visit code 99204
Established Patient
$86.56 typical visit price
range $23.96 – $169.60
Typical copayment $21.64 (range $5.99 – $42.40)
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.

Dermatology
795 EL CAMINO REAL
PALO ALTO, CA 94301
Psychiatry & Neurology (Psychiatry)
795 EL CAMINO REAL
PALO ALTO, CA 94301
Physical Therapist
795 EL CAMINO REAL
PALO ALTO, CA 94301
Dietitian, Registered
795 EL CAMINO REAL
PALO ALTO, CA 94301
Dermatology
795 EL CAMINO REAL
PALO ALTO, CA 94301
Family Medicine
795 EL CAMINO REAL
PALO ALTO, CA 94301
Pediatrics
795 EL CAMINO REAL
PALO ALTO, CA 94301
Internal Medicine (Gastroenterology)
795 EL CAMINO REAL
PALO ALTO, CA 94301

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 Winona Tan's NPI number?

The NPI number for Winona Tan is 1003904350. It was assigned to this individual provider in the NPPES registry on October 11, 2006.

Where is Winona Tan located?

Winona Tan practices at 795 El Camino Real, Palo Alto, CA 94301. The listed phone number is (650) 853-2917.

What is Winona Tan's specialty?

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

Is Winona Tan enrolled in Medicare?

Yes. Winona Tan 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.

When was this NPI record last updated?

The NPPES record for Winona Tan was last updated on March 4, 2020. NPI Profile syncs with the weekly NPPES data releases published by CMS.