DR. TIFFANY WEN-AN GUO M.D.
NPI 1922549286
Internal Medicine in San Jose, CA

Q: What is Tiffany Guo's NPI number?

The NPI number for Tiffany Guo is 1922549286. It was assigned to this individual provider in the NPPES registry on March 19, 2017.

Q: What is Tiffany Guo's specialty?

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

Q: When was this NPI record last updated?

The NPPES record for Tiffany Guo was last updated on July 13, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.

Active since March 19, 2017PECOS Enrolled

751 S BASCOM AVE, SAN JOSE, CA 95128(888) 334-1000 Get Directions Write a Review

NPPES record last updated: July 13, 2020. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Jul 13, 2020, Mar 19, 2017 (2 updates tracked since 2017).

On this page

About Dr. Tiffany Wen-an Guo M.d. NPPES

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

DR. TIFFANY WEN-AN GUO M.D. (NPI 1922549286) is an individual internal medicine provider in San Jose, California, licensed in California (A157135) and active in the NPI registry since March 2017. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1922549286

Entity TypeIndividualFemale

Primary Taxonomy207R00000X

Provider Legal NameDR. TIFFANY WEN-AN GUOCredential: M.D.

Location Address751 S BASCOM AVESan Jose, CA 95128-2604

Mailing Address20488 Stevens Creek Blvd Apt 1105Cupertino, CA 95014-2282

Phone(888) 334-1000

Sole ProprietorYes

Enumeration DateMarch 19, 2017

Last NPPES UpdateJuly 13, 20202 updates tracked since enumeration

NPPES CertifiedJuly 13, 2020

✔ NPI 1922549286 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 · A157135

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.

751 S BASCOM AVE, San Jose, CA 95128

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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Tiffany Wen-an Guo M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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

Medicare enrollment records show Tiffany Guo reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

County Of Santa Clara

0.1 mi

Clinic/Center

828 S BASCOM AVE STE 250
San Jose, CA 95128

Reassigned Medicare billing, California enrollment
Also billed through NPI 1588721500 (California), NPI 1629301346 (California)
2,460 clinicians in this Medicare group

NPI 1154906634 (408) 885-5000

Enlightened Healthcare Alliance Medical Corporation

396 mi

Internal Medicine

662 ENCINITAS BLVD STE 220
Encinitas, CA 92024

Reassigned Medicare billing, California enrollment
70 clinicians in this Medicare group

NPI 1710458245 (833) 446-6363

North County Inpatient Medical Alliance, A Medical Group, Inc

396 mi

Hospitalist

354 SANTA FE DR
Encinitas, CA 92024

Reassigned Medicare billing, California enrollment
92 clinicians in this Medicare group

NPI 1932108115 (760) 230-2251

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 3

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.

Residence visit for established patient with high level of medical decision making, per day, if using time, at least 60 minutes 99350

An established patient home visit is a service where a healthcare professional visits a patient's home for a check-up or treatment. The visit typically lasts for about an hour. This service is especially beneficial for patients who may have difficulty traveling to a healthcare facility.

42 services27 patients

Residence visit for new patient with high level of medical decision making, per day, if using time, at least 75 minutes 99345

A new patient home visit is a comprehensive 75-minute appointment conducted at your home. The healthcare professional will assess your health, discuss any concerns, and create a personalized care plan. It's convenient, comfortable, and tailored to your specific needs.

24 services24 patients

Residence visit for established patient with moderate level of medical decision making, per day, if using time, at least 40 minutes 99349

An established patient home visit is a medical appointment conducted at your home, typically lasting around 40 minutes. This service is ideal for patients who may find it difficult to travel to a healthcare facility. During this visit, a healthcare professional will evaluate your health status, manage your care, and answer any health-related questions you may have.

24 services16 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 95128 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

$121.77 typical visit price

range $23.96 – $169.60

Typical copayment $30.44 (range $5.99 – $42.40)

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.

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.

MS. TRANG N NGUYEN PHARM.D

Pharmacist

751 S BASCOM AVE
SAN JOSE, CA 95128

Santa Clara County (408) 885-2360

DR. ILANA TRAYNIS M.D.

Student in an Organized Health Care Education/Training Program

751 S BASCOM AVE, DEPARTMENT OF MEDICINE
SAN JOSE, CA 95128

Santa Clara County (408) 885-6300

DR. ABBY KATHERINE SCURFIELD MD

Student in an Organized Health Care Education/Training Program

751 S BASCOM AVE
SAN JOSE, CA 95128

Santa Clara County (408) 885-5000

GABRIELLE MINEHAN CCP

Perfusionist

751 S BASCOM AVE
SAN JOSE, CA 95128

Santa Clara County (408) 885-5000

PRIYA NIGAM MD

Student in an Organized Health Care Education/Training Program

751 S BASCOM AVE
SAN JOSE, CA 95128

Santa Clara County (408) 885-5000

CAROLINE DENISON JORDAN

Student in an Organized Health Care Education/Training Program

751 S BASCOM AVE
SAN JOSE, CA 95128

Santa Clara County (408) 885-5000

MICHAEL NATHANSON MD, PHD

Thoracic Surgery (Cardiothoracic Vascular Surgery)

751 S BASCOM AVE, CARDIAC SURGERY DEPT
SAN JOSE, CA 95128

Santa Clara County (408) 885-5000

EAMONN PATRICK DUNPHY MD

Internal Medicine

751 S BASCOM AVE, RADIATION ONCOLOGY
SAN JOSE, CA 95128

Santa Clara County (408) 885-4150

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 Tiffany Guo's NPI number?

The NPI number for Tiffany Guo is 1922549286. It was assigned to this individual provider in the NPPES registry on March 19, 2017.

Where is Tiffany Guo located?

Tiffany Guo practices at 751 S Bascom Ave, San Jose, CA 95128. The listed phone number is (888) 334-1000.

What is Tiffany Guo's specialty?

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

Is Tiffany Guo enrolled in Medicare?

Yes. Tiffany Guo is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Tiffany Guo's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Tiffany Guo reassigns Medicare benefits to 3 organizations: County Of Santa Clara (San Jose, CA), Enlightened Healthcare Alliance Medical Corporation (Encinitas, CA) and North County Inpatient Medical Alliance, A Medical Group, Inc (Encinitas, 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 Tiffany Guo'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 Tiffany Guo was last updated on July 13, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.