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DR. NING TANG M.D.
NPI 1790806131
Internal Medicine in Portola Valley, CA

Active since April 03, 2007Opted out of Medicare · through Sep 21, 2026
3250 ALPINE ROAD, STANFORD PRIMARY CARE, PORTOLA VALLEY, CA 94028(650) 498-9000(650) 736-0647 Get Directions Write a Review

NPPES record last updated: October 13, 2016. Verified against the NPPES registry weekly; last sync: August 16, 2026.

About Dr. Ning Tang M.d. NPPES

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

DR. NING TANG M.D. (NPI 1790806131) is an individual internal medicine provider in Portola Valley, California, licensed in California (A109252) and active in the NPI registry since April 2007. She has opted out of Medicare through September 21, 2026 and remains eligible to order and refer.

NPPES Registry Identity

NPI1790806131
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameDR. NING TANGCredential: M.D.
Location Address3250 ALPINE ROAD, STANFORD PRIMARY CAREPortola Valley, CA 94028
Mailing Address1804 Embarcadero Rd, Ste 100Palo Alto, CA 94303-3341 · (650) 723-4000
Phone(650) 498-9000
Fax(650) 736-0647
Sole ProprietorNo
Enumeration DateApril 3, 2007
Last NPPES UpdateOctober 13, 2016
✔ NPI 1790806131 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in CA · A109252
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
3250 ALPINE ROAD, Portola Valley, CA 94028
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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

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Opted out of Medicare

Dr. Ning Tang M.d. has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from September 21, 2020 through September 21, 2026.

Opt-Out Effective DateSeptember 21, 2020
Opt-Out In Effect ThroughSeptember 21, 2026Opt-out affidavits renew automatically every two years unless cancelled
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesAn opted-out provider can still order and refer for Medicare patients in the categories marked above, even though their own services are not covered.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94028 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
$119.48 typical visit price
range $23.44 – $166.46
Typical copayment $29.87 (range $5.86 – $41.61)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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 Ning Tang's NPI number?

The NPI number for Ning Tang is 1790806131. It was assigned to this individual provider in the NPPES registry on April 3, 2007.

Where is Ning Tang located?

Ning Tang practices at 3250 Alpine Road Stanford Primary Care, Portola Valley, CA 94028. The listed phone number is (650) 498-9000.

What is Ning Tang's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Ning Tang enrolled in Medicare?

No. Ning Tang has opted out of Medicare through September 21, 2026. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out. The provider remains eligible to order and refer services for Medicare patients.

When was this NPI record last updated?

The NPPES record for Ning Tang was last updated on October 13, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.