Jelena M. Kao, MD
NPI 1932242062ActiveIndividual· Internal Medicine, Hematology & Oncology· San Mateo, CA
Internal Medicine, Hematology & Oncology (MD) in San Mateo, California, trained at Stanford University School of Medicine (class of 2005). Their prescriptions cost Medicare Part D more than their services did: $809,124 for 348 claims, against $146,305 paid for services in 2024. Adaptive Biotechnologies Corporation was the largest of 15 companies reporting payments in 2025, $732.45 in all, mostly food and beverage.
Overview
| NPI | 1932242062 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Feb 15, 2007 |
| Last updated in NPPES | Apr 29, 2025 |
| Certified by provider | Apr 29, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | A83980 | CA |
| Internal Medicine, Hematology & Oncology | 207RH0003X | MD-24166 | HI |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Medical Oncology (CA); Practitioner - Medical Oncology (HI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 109 |
|---|---|
| Services billed | 7,139 across 56 procedure codes |
| Paid by Medicare | $146,305 |
Part D prescriptions in 2024
| Prescriptions (claims) | 348 · 716 30-day fills |
|---|---|
| Patients | 111 |
| Total drug cost | $809,124 |
| Generic share | 71% of claims |
Education and affiliations
| Medical school | Stanford University School of Medicine |
|---|---|
| Graduation year | 2005 |
| Medicare specialty | Medical Oncology |
| Secondary specialties | Hematology, Internal Medicine |
| Telehealth | Offers telehealth |
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$732.45 · 24 payments from 15 companies
- 2024$54.60 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Adaptive Biotechnologies Corporation | $137.40 | 1 |
| Pfizer Inc. | $130.85 | 5 |
| Novartis Pharmaceuticals Corporation | $88.34 | 3 |
| Glaxosmithkline, LLC. | $66.63 | 2 |
| Bayer Healthcare Pharmaceuticals Inc. | $58.91 | 2 |
What the 2025 payments were for
- Food and Beverage$732.45 · 24 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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