NPPES file of Aug 9, 2026

Jennifer Olivia Chan, M.D.

Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · Walnut Creek, CA

Jennifer Olivia Chan, M.D. is a thoracic surgery (cardiothoracic vascular surgery) physician with a practice address in Walnut Creek, California, and NPI 1265634687, issued on Jun 5, 2007. Check the license (California A87218, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1265634687
Name
Jennifer Olivia Chan
Credential
M.D.
Primary taxonomy
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician 208G00000X
License number
A87218 CA
Self-reported in NPPES; status is on the state search
Practice location
2637 Shadelands Dr, Walnut Creek, CA 94598
Phone
(925) 932-6330
Enumerated
Jun 5, 2007
Record last updated
Nov 13, 2024
Fax
(925) 932-0139
Medicare enrollment
Enrolled (PECOS I20100907000633); accepts Medicare assignment
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest thoracic surgery (cardiothoracic vascular surgery) physician records → All 634 in California → Look up another NPI →

Also registered at 2637 Shadelands Dr

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Anita Anand, NPFamily Nurse Practitioner1023993102
  2. Stacyann Andaya, NPFamily Nurse Practitioner1649893660
  3. Audrey Arzamendi, M.D.Endocrinology, Diabetes & Metabolism Physician1508159567
  4. Anthony Bernens, MDInternal Medicine Physician1215983440
  5. Heidi Chang, MDObstetrics & Gynecology Physician1649681982
  6. Katherine Chang, NPNurse Practitioner1679357248

Verify Jennifer Olivia Chan in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A87218    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the California license search

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59% fewer Medicare Part D claims than the average thoracic surgery (cardiothoracic vascular surgery) physician in 2024

41 Medicare Part D claims for 28 beneficiaries, against an average of 101 among the 2,587 providers of this specialty who prescribed in Part D. 27 claims were for opioids.

  1. Jennifer Chan41
  2. Specialty average101

Most prescribed

  1. Hydrocodone-Acetaminophen25 claims

Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.

Industry payments in 2024: $312.64

5 payments; by number, the most common kind was food and beverage; the largest payer was Intuitive Surgical, Inc. The 4,047 providers of this specialty with any payment received $7,828.84 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Jennifer Chan$312.64
  2. Specialty average$7,828.84

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Bills Medicare through one group practice

  1. Bass Medical GroupAlamo, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Jennifer Olivia Chan among 634 thoracic surgery (cardiothoracic vascular surgery) physician records in California

Jennifer Olivia Chan, M.D. is one of 634 thoracic surgery (cardiothoracic vascular surgery) physician records with a practice address in California. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 55% of them.

  • NPI issued2007 · 55% of these records are older, 37% newer
  • In a Medicare fileYes · 75% of these records are
  • In the CMS Doctors and Clinicians fileYes · 64% of these records are
  • Graduated2002 · median 1997 among the 408 with a school on file
  • Record last updated2024 · 59% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208G00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician providers in California

There are 634 thoracic surgery (cardiothoracic vascular surgery) physician records in California.

All 634 in California → Every provider in Walnut Creek → Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician nationwide →

The 8 thoracic surgery (cardiothoracic vascular surgery) physician records with the nearest ZIP codes

  1. Saurin Shah, M.DWalnut Creek, CA 945981902062698
  2. Michaela Straznicka, M.D.Walnut Creek, CA 945981003858283
  3. Wilson Tsai, MDWalnut Creek, CA 945981609035666
  4. Ching-Kuo Chang, MDWalnut Creek, CA 945961871671925
  5. Kanti Uppal, MDWalnut Creek, CA 945961144308206
  6. Noel Concepcion, MDOakland, CA 946051942243308
  7. Leigh Iverson, M.D.Oakland, CA 946091871685867
  8. Junaid Khan, M.D.Oakland, CA 946091750493466

Common questions

What is Jennifer Olivia Chan, M.D.'s NPI number?

Jennifer Olivia Chan, M.D.'s National Provider Identifier (NPI) is 1265634687, issued on Jun 5, 2007. An NPI identifies a provider in billing; it is not a license.

Where is Jennifer Olivia Chan, M.D. located?

The NPPES record lists a practice address at 2637 Shadelands Dr, Walnut Creek, CA, 94598. Phone: (925) 932-6330. Providers update this record themselves, so call before visiting.

How can I verify Jennifer Olivia Chan, M.D.'s license?

NPPES lists California license number A87218, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does Jennifer Olivia Chan, M.D. prescribe under Medicare Part D?

In 2024, Jennifer Olivia Chan, M.D. had 41 Medicare Part D claims for 28 beneficiaries; the average among thoracic surgery (cardiothoracic vascular surgery) physician prescribers was 101. Part D covers Medicare prescriptions only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.