JENNIFER OLIVIA CHAN M.D.
NPI 1265634687
Thoracic Surgery (Cardiothoracic Vascular Surgery) in Walnut Creek, CA

Q: What is Jennifer Chan's NPI number?

The NPI number for Jennifer Chan is 1265634687. It was assigned to this individual provider in the NPPES registry on June 5, 2007.

Q: What is Jennifer Chan's specialty?

The primary specialty registered for this NPI is Thoracic Surgery (Cardiothoracic Vascular Surgery) with taxonomy code 208G00000X.

Q: When was this NPI record last updated?

The NPPES record for Jennifer Chan was last updated on November 13, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 23 months 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 June 05, 2007PECOS EnrolledAccepts Medicare Assignment

2637 SHADELANDS DR, WALNUT CREEK, CA 94598(925) 932-6330(925) 932-0139 Get Directions Write a Review

NPPES record last updated: November 13, 2024. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Nov 13, 2024, Feb 11, 2022, Nov 5, 2018 and 2 more (5 updates tracked since 2017).

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About Jennifer Olivia Chan M.d. NPPES

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

JENNIFER OLIVIA CHAN M.D. (NPI 1265634687) is an individual thoracic surgery (cardiothoracic vascular surgery) provider in Walnut Creek, California, licensed in California (A87218) and active in the NPI registry since June 2007. She is enrolled in Medicare PECOS and is a graduate of Other (2002).

NPPES Registry Identity

NPI1265634687

Entity TypeIndividualFemale

Primary Taxonomy208G00000X

Provider Legal NameJENNIFER OLIVIA CHANCredential: M.D.

Location Address2637 SHADELANDS DRWalnut Creek, CA 94598-2512

Mailing Address2637 Shadelands DrWalnut Creek, CA 94598-2512 · (925) 932-6330 · Fax (925) 932-0139

Phone(925) 932-6330

Fax(925) 932-0139

Sole ProprietorNo

Medical School CMSOtherGraduated 2002

Enumeration DateJune 5, 2007

Last NPPES UpdateNovember 13, 20245 updates tracked since enumeration

NPPES CertifiedNovember 13, 2024

✔ NPI 1265634687 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyThoracic Surgery (Cardiothoracic Vascular Surgery)Allopathic & Osteopathic Physicians

Taxonomy Code208G00000X

License✔ Licensed in CA · A87218

Definition

A thoracic surgeon provides the operative, perioperative and critical care of patients with pathologic conditions within the chest. Included is the surgical care of coronary artery disease, cancers of the lung, esophagus and chest wall, abnormalities of the trachea, abnormalities of the great vessels and heart valves, congenital anomalies, tumors of the mediastinum and diseases of the diaphragm. The management of the airway and injuries of the chest is within the scope of the specialty.

Also ListedSurgeryTaxonomy 208600000X · License A87218 (CA)

2637 SHADELANDS DR, 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

Jennifer Olivia Chan 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 ID6406970805

PECOS Enrollment IDI20100907000633

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 Jennifer Chan reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Bass Medical Group

Same address

Specialist

2637 SHADELANDS DR
Walnut Creek, CA 94598

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

NPI 1154401941 (925) 932-6330

John Muir Trauma Physicians Billing Service

1.4 mi

Trauma Surgery

1601 YGNACIO VALLEY RD
Walnut Creek, CA 94598

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

NPI 1962551861 (925) 947-5331

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 5

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 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.

22 services18 patients

Removal of lymph nodes of chest cavity using an endoscope 32674

This procedure involves using a thin, flexible tube with a light and camera, known as an endoscope, to access and remove lymph nodes in the chest cavity. It's a minimally invasive method, which can help in diagnosing or treating certain conditions.

14 services14 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.

13 services13 patients

Exam of lung with removal of lung lobe using an endoscope 32663

This is a procedure where an endoscope, a thin tube with a light and camera, is used to examine the lung and remove a lobe if necessary. It's less invasive than traditional surgery, resulting in shorter recovery time.

12 services12 patients

Study of esophagus to assess movement 91010

This procedure, known as esophageal manometry, involves studying the esophagus or food pipe to evaluate its movement and pressure. It helps understand how well the esophagus can move food to the stomach. Involving a thin, flexible tube, it's a safe, minimally invasive test.

11 services11 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

$202.35 typical visit price

range $69.00 – $202.35

Typical copayment $50.58 (range $17.25 – $50.58)

Most-billed visit code 99205

Established Patient

$84.91 typical visit price

range $23.44 – $166.46

Typical copayment $21.22 (range $5.86 – $41.61)

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.

MICHAELA STRAZNICKA M.D.

Thoracic Surgery (Cardiothoracic Vascular Surgery)