June S. Peng, MD
Surgical Oncology Physician · Walnut Creek, CA
June S. Peng, MD is a surgical oncology physician with a practice address in Walnut Creek, California, and NPI 1124321252, issued on Dec 12, 2010. Check the license (California 191994, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- June S. Peng
- Credential
- MD
- Primary taxonomy
- Surgical Oncology Physician 2086X0206X
- License numbers
- 191994 CA
MD468184 PA
Self-reported in NPPES; status is on the state search - Practice location
- 1479 Ygnacio Valley RD Ste 200, Walnut Creek, CA 94598
- Phone
- (925) 296-7340
- Enumerated
- Dec 12, 2010
- Record last updated
- Nov 21, 2023
- Medicaid ID
- 1036594280001 PA
- Medicare enrollment
- Enrolled (PECOS I20231227000155); accepts Medicare assignment
- Medical or professional school
- Johns Hopkins University School Of Medicine, 2012
- Entity
- Type 1 · individual
8 nearest surgical oncology physician records → All 250 in California → Look up another NPI →
Also registered at 1479 Ygnacio Valley RD Ste 200
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Rohit Anand, MDGastroenterology Physician1902243025
- Megan McCaleb, PA-C, MSPAS, MPHSurgical Physician Assistant1467803965
Verify June S. Peng in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 191994Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
56% fewer Medicare Part D claims than the average surgical oncology physician in 2024
38 Medicare Part D claims for 14 beneficiaries, against an average of 87 among the 1,237 providers of this specialty who prescribed in Part D.
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.
The practice group's MIPS final score for 2023 (Medicare payment program): 71.8 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $130.30
3 payments; by number, the most common kind was food and beverage; the largest payer was Intuitive Surgical, Inc. The 1,132 providers of this specialty with any payment received $4,224.74 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- John Muir Physician NetworkWalnut Creek, CA
- Ucsf Dept OF SurgerySan Francisco, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
June S. Peng among 250 surgical oncology physician records in California
June S. Peng, MD is one of 250 surgical oncology physician records with a practice address in California. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 64% of them.
- NPI issued2010 · 64% of these records are older, 33% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated2012 · median 2004 among the 184 with a school on file
- Record last updated2023 · 44% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2086X0206X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Surgical Oncology Physician providers in California
There are 250 surgical oncology physician records in California.
All 250 in California → Every provider in Walnut Creek → Surgical Oncology Physician nationwide →
The 8 surgical oncology physician records with the nearest ZIP codes
- Alexandra Moore, M.D.Vallejo, CA 945891902268253
- Giovanni Begossi, M.D.Oakland, CA 946091053460873
- Pedro Ramirez, M.D.Saint Helena, CA 945741538274816
- Joanna Lee, M.D.Fremont, CA 945381235428475
- Weston Stover, MDTravis Afb, CA 945351366837353
- Jeffrey SternBerkeley, CA 947041447211784
- Jaikrishna Balkissoon, MDBerkeley, CA 947051508974056
- Carl Sutherland, MDSan Mateo, CA 944031679801609
Common questions
What is June S. Peng, MD's NPI number?
June S. Peng, MD's National Provider Identifier (NPI) is 1124321252, issued on Dec 12, 2010. An NPI identifies a provider in billing; it is not a license.
Where is June S. Peng, MD located?
The NPPES record lists a practice address at 1479 Ygnacio Valley RD Ste 200, Walnut Creek, CA, 94598. Phone: (925) 296-7340. Providers update this record themselves, so call before visiting.
How can I verify June S. Peng, MD's license?
NPPES lists California license number 191994, 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 June S. Peng, MD prescribe under Medicare Part D?
In 2024, June S. Peng, MD had 38 Medicare Part D claims for 14 beneficiaries; the average among surgical oncology physician prescribers was 87. Part D covers Medicare prescriptions only.
What is June S. Peng, MD's MIPS final score?
The 2023 MIPS final score is 71.8 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.
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.