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ALLISON NAIQUAN ZHANG MD
NPI 1821435900
Internal Medicine - Gastroenterology in San Jose, CA

Active since May 29, 2013PECOS EnrolledAccepts Medicare Assignment
2585 SAMARITAN DR STE 25 2ND FL, SAN JOSE, CA 95124(650) 736-5555 Get Directions Write a Review

NPPES record last updated: April 12, 2024. Verified against the NPPES registry weekly; last sync: July 26, 2026.

Record update history: Apr 12, 2024, Aug 28, 2023, Jun 15, 2021 and 3 more (6 updates tracked since 2017).

About Allison Naiquan Zhang Md NPPES

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

ALLISON NAIQUAN ZHANG MD (NPI 1821435900) is an individual gastroenterology provider in San Jose, California, licensed in California (A165178) and active in the NPI registry since May 2013. She is enrolled in Medicare PECOS, maintains a secondary practice location in Los Gatos, and is a graduate of Wayne State University School Of Medicine (2013).

NPPES Registry Identity

NPI1821435900
Entity TypeIndividualFemale
Primary Taxonomy207RG0100X
Provider Legal NameALLISON NAIQUAN ZHANGCredential: MD
Location Address2585 SAMARITAN DR STE 25 2ND FLSan Jose, CA 95124-4107
Mailing Address2585 Samaritan Dr Ste 25 2nd FlSan Jose, CA 95124-4107 · (650) 736-5555
Phone(650) 736-5555
Sole ProprietorNo
Medical School CMSWayne State University School Of MedicineGraduated 2013
Enumeration DateMay 29, 2013
Last NPPES UpdateApril 12, 20246 updates tracked since enumeration
NPPES CertifiedApril 12, 2024
✔ NPI 1821435900 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians
Taxonomy Code207RG0100X
License✔ Licensed in CA · A165178
Definition
An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.
Also ListedInternal MedicineTaxonomy 207R00000X · License A165178 (CA)
2585 SAMARITAN DR STE 25 2ND FL, San Jose, CA 95124
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Other Names 1

Former Name (1)Ms. Naiquan Zhang

Secondary Practice Location 1

Location 114777 Los Gatos Blvd Ste 200Los Gatos, CA 95032-2059 · Phone (669) 294-8800

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

Allison Naiquan Zhang Md 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 ID1850692096
PECOS Enrollment IDI20200713000020
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 7

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.

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204
This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.
154 services154 patients
Removal of polyps or growths of large bowel using an endoscope with mechanical snare 45385
This procedure involves using a thin, flexible tube called an endoscope to examine the large bowel. If any abnormal growths or polyps are found, a tool called a mechanical snare is used to remove them. This is a common method to prevent potential health issues.
132 services131 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
125 services110 patients
Biopsy of large bowel using a flexible endoscope 45380
A biopsy of the large bowel using a flexible endoscope is a procedure where a thin, flexible tube with a camera is inserted through the rectum to examine the bowel. If abnormal tissue is found, a small sample is taken for further examination. This helps in diagnosing conditions like inflammation, polyps, or cancer.
124 services124 patients
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43239
This procedure involves using a thin, flexible tube with a light and camera, known as an endoscope, to examine the esophagus, stomach, and upper part of the small intestine. Small tissue samples are taken for further examination to help diagnose various conditions.
83 services80 patients
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
67 services57 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 95124 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.

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 Allison Zhang's NPI number?

The NPI number for Allison Zhang is 1821435900. It was assigned to this individual provider in the NPPES registry on May 29, 2013. The provider is also known as Ms. Naiquan Zhang.

Where is Allison Zhang located?

Allison Zhang practices at 2585 Samaritan Dr Ste 25 2nd Fl, San Jose, CA 95124. The listed phone number is (650) 736-5555.

What is Allison Zhang's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Is Allison Zhang enrolled in Medicare?

Yes. Allison Zhang 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 Allison Zhang was last updated on April 12, 2024. NPI Profile syncs with the weekly NPPES data releases published by CMS.