June S. Peng, MD
NPI 1124321252ActiveIndividual· Surgery, Surgical Oncology· Walnut Creek, CA
Surgery, Surgical Oncology (MD) in Walnut Creek, California, trained at Johns Hopkins University School of Medicine (class of 2012). Mostly services rather than prescriptions: Medicare paid $55,141 for 106 patients in 2024, with only 38 Part D claims. Histosonics, Inc. was the largest of 4 companies reporting payments in 2025, $1,411 in all, mostly travel and lodging.
Overview
| NPI | 1124321252 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Dec 12, 2010 |
| Last updated in NPPES | Nov 21, 2023 |
| Certified by provider | Nov 21, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Surgery, Surgical Oncology Primary | 2086X0206X | 191994 | CA |
| Surgery, Surgical Oncology | 2086X0206X | MD468184 | PA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Surgical Oncology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 106 |
|---|---|
| Services billed | 205 across 40 procedure codes |
| Paid by Medicare | $55,141 |
Part D prescriptions in 2024
| Prescriptions (claims) | 38 · 46 30-day fills |
|---|---|
| Patients | 14 |
| Total drug cost | $32,544 |
| Generic share | 74% of claims |
Education and affiliations
| Medical school | Johns Hopkins University School of Medicine |
|---|---|
| Graduation year | 2012 |
| Medicare specialty | Surgical Oncology |
Medical group
- John Muir Physician NetworkPleasant Hill, CA · 494 clinicians
Hospital affiliations
- John Muir Medical Center - Concord CampusConcord, CA
- John Muir Medical Center - Walnut Creek CampusWalnut Creek, CA
Industry payments (Open Payments)
- 2025$1,411 · 10 payments from 4 companies
- 2024$130.30 · 3 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Histosonics, Inc. | $1,178 | 7 |
| Dilon Technologies, Inc. | $174.93 | 1 |
| Astrazeneca Pharmaceuticals LP | $29.49 | 1 |
| Avanos Medical | $29.03 | 1 |
What the 2025 payments were for
- Travel and Lodging$897.40 · 4 payments
- Food and Beverage$513.97 · 6 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records