DR. YI ZHENG M.D.
NPI 1851622427
Internal Medicine - Gastroenterology in Walnut Creek, CA

Q: What is Yi Zheng's NPI number?

The NPI number for Yi Zheng is 1851622427. It was assigned to this individual provider in the NPPES registry on January 21, 2010.

Q: What is Yi Zheng's specialty?

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

Q: When was this NPI record last updated?

The NPPES record for Yi Zheng was last updated on May 21, 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 January 21, 2010PECOS EnrolledAccepts Medicare Assignment

75/100

CMS Quality Rating

2021 YGNACIO VALLEY RD STE E105, WALNUT CREEK, CA 94598(925) 384-9276 Get Directions Write a Review

NPPES record last updated: May 21, 2020. Verified against the NPPES registry weekly; last sync: October 18, 2026.

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About Dr. Yi Zheng M.d. NPPES

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

DR. YI ZHENG M.D. (NPI 1851622427) is an individual gastroenterology provider in Walnut Creek, California, licensed in California (A95560) and active in the NPI registry since January 2010. She is enrolled in Medicare PECOS and is a graduate of Other (1998).

NPPES Registry Identity

NPI1851622427

Entity TypeIndividualFemale

Primary Taxonomy207RG0100X

Provider Legal NameDR. YI ZHENGCredential: M.D.

Location Address2021 YGNACIO VALLEY RD STE E105Walnut Creek, CA 94598-3391

Mailing Address1871 Lamplight CtWalnut Creek, CA 94597-2958 · (415) 828-7915

Phone(925) 384-9276

Sole ProprietorNo

Medical School CMSOtherGraduated 1998

Enumeration DateJanuary 21, 2010

Last NPPES UpdateMay 21, 2020

NPPES CertifiedMay 21, 2020

✔ NPI 1851622427 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians

Taxonomy Code207RG0100X

License✔ Licensed in CA · A95560

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.

2021 YGNACIO VALLEY RD STE E105, Walnut Creek, CA 94598

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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 and accepts Medicare assignment

Dr. Yi Zheng 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 ID3779623590

PECOS Enrollment IDI20091229000401

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 Yi Zheng reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Yi Zheng MD PC

0.1 mi

Gastroenterology

2121 YGNACIO VALLEY RD STE E105
Walnut Creek, CA 94598

Reassigned Medicare billing, California enrollment

NPI 1083280853 (925) 384-9276

Executive Surgery Center, Inc.

10 mi

Ambulatory Surgical

1320 EL CAPITAN DR, SUITE 100
Danville, CA 94526

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

NPI 1952698078 (925) 963-0759

Permanente Medical Group Inc

18 mi

Internal Medicine

901 NEVIN
Richmond, CA 94801

Reassigned Medicare billing, California enrollment
20,078 clinicians in this Medicare group

NPI 1235226531 (510) 307-1555

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 13

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.

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.

623 services355 patients

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.

198 services198 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.

160 services139 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.

160 services159 patients

Biopsy of small bowel (except ileum) using an endoscope 44361

A small bowel biopsy involves using a thin, flexible tube called an endoscope to examine the small intestine and take a small tissue sample. This sample is then examined under a microscope for any abnormalities. It's a safe, minimally invasive procedure.

150 services135 patients

Ultrasound scan of organ tissue for measuring elasticity 76981

An ultrasound scan of organ tissue measures elasticity, or flexibility. This non-invasive procedure uses sound waves to create images of the inside of your body. It helps in assessing the health of various organs by detecting changes in their stiffness or softness.

79 services76 patients

Measurement of liver stiffness 91200

Measurement of liver stiffness is a non-invasive procedure that helps assess the health of your liver. It uses sound waves to detect the hardness of the liver tissue, which can indicate conditions like fibrosis or cirrhosis. It's a simple, painless test that provides valuable information about your liver's health.

73 services72 patients

Removal of polyps or growths of large bowel using a flexible endoscope with electrical cautery 45384

This procedure involves using a flexible tube with a camera, called an endoscope, to view the large intestine. If any abnormal growths or polyps are found, they are removed with an electrically-heated instrument. This is a common way to prevent bowel issues.

62 services62 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.

57 services56 patients

Colorectal cancer screening; colonoscopy on individual at high risk G0105

Colorectal cancer screening, specifically a colonoscopy, is a preventive measure for those at high risk. A thin, flexible tube with a camera inspects the colon to spot any abnormal growths. This test helps detect potential issues early, enhancing the effectiveness of treatment.

36 services36 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.

35 services35 patients

Diagnostic exam of lower portion of large bowel using a flexible endoscope 45330

This procedure, known as a sigmoidoscopy, involves using a flexible tube with a camera to examine the lower part of your large bowel. It helps in identifying issues like inflammation, ulcers, or abnormal growths. It's a safe, minimally invasive procedure.

19 services18 patients

Diagnostic exam of large bowel using a flexible endoscope 45378

This procedure, known as a colonoscopy, involves using a flexible tube with a light and camera to examine the large intestine. It helps detect any abnormalities such as polyps or inflammation. It's a standard procedure to ensure gut health.

19 services18 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94598 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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

75/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Individually scored

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 Yi Zheng's NPI number?

The NPI number for Yi Zheng is 1851622427. It was assigned to this individual provider in the NPPES registry on January 21, 2010.

Where is Yi Zheng located?

Yi Zheng practices at 2021 Ygnacio Valley Rd Ste E105, Walnut Creek, CA 94598. The listed phone number is (925) 384-9276.

What is Yi Zheng's specialty?

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

Is Yi Zheng enrolled in Medicare?

Yes. Yi Zheng 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.

Which organizations bill Medicare for Yi Zheng's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Yi Zheng reassigns Medicare benefits to 3 organizations: Yi Zheng MD PC (Walnut Creek, CA), Executive Surgery Center, Inc. (Danville, CA) and Permanente Medical Group Inc (Richmond, 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 Yi Zheng'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 Yi Zheng was last updated on May 21, 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.