Tiffany Holcombe Svahn, M.D.
NPI 1518920479ActiveIndividual· Internal Medicine, Hematology & Oncology· Pleasant Hill, CA
Internal Medicine, Hematology & Oncology (M.D.) in Pleasant Hill, California, trained at Columbia University College of Physicians and Surgeons (class of 2000). Their prescriptions cost Medicare Part D more than their services did: $496,242 for 1,377 claims, against $250,884 paid for services in 2024. Merck Sharp & Dohme LLC was the largest of 26 companies reporting payments in 2025, $1,123 in all, mostly food and beverage.
Overview
| NPI | 1518920479 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Apr 10, 2006 |
| Last updated in NPPES | Aug 5, 2021 |
| Certified by provider | Aug 5, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | A81256 | CA |
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 - Hematology/Oncology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 631 |
|---|---|
| Services billed | 10,790 across 66 procedure codes |
| Paid by Medicare | $250,884 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,377 · 3,119 30-day fills |
|---|---|
| Patients | 366 |
| Total drug cost | $496,242 |
| Generic share | 95% of claims |
Education and affiliations
| Medical school | Columbia University College of Physicians and Surgeons |
|---|---|
| Graduation year | 2000 |
| Medicare specialty | Hematology/Oncology |
| 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$1,123 · 46 payments from 26 companies
- 2024$715.39 · 24 payments from 15 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Merck Sharp & Dohme LLC | $115.33 | 5 |
| Daiichi Sankyo Inc. | $95.90 | 4 |
| Janssen Biotech, Inc. | $95.47 | 4 |
| Astrazeneca Pharmaceuticals LP | $81.55 | 3 |
| Abbvie Inc. | $77.74 | 2 |
What the 2025 payments were for
- Food and Beverage$1,123 · 46 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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