Tarannum Guller, MD
NPI 1972532083ActiveIndividual· Internal Medicine· Fremont, CA
Internal Medicine (MD) with Bass Medical Group, practicing in Fremont, California. Mostly services rather than prescriptions: Medicare paid $1,931 for 12 patients in 2024, with only 26 Part D claims. Merck Sharp & Dohme LLC was the largest of 3 companies reporting payments in 2025, $109.61 in all, mostly food and beverage. Lists John Muir Medical Center - Walnut Creek Campus and 1 other hospital as hospital affiliations.
Overview
| NPI | 1972532083 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jul 1, 2006 |
| Last updated in NPPES | Oct 23, 2026 |
| Certified by provider | Oct 23, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A89244 | CA |
| Hospitalist | 208M00000X | A89244 | CA |
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 - Internal Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 12 |
|---|---|
| Services billed | 20 across 6 procedure codes |
| Paid by Medicare | $1,931 |
Part D prescriptions in 2024
| Prescriptions (claims) | 26 · 53 30-day fills |
|---|---|
| Patients | 13 |
| Total drug cost | $218.32 |
| Generic share | 92% of claims |
Education and affiliations
| Graduation year | 1999 |
|---|---|
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Bass Medical GroupChico, CA · 291 clinicians
Hospital affiliations
- John Muir Medical Center - Walnut Creek CampusWalnut Creek, CA
- San Ramon Regional Medical CenterSan Ramon, CA
Industry payments (Open Payments)
- 2025$109.61 · 4 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Merck Sharp & Dohme LLC | $64.07 | 2 |
| Astrazeneca Pharmaceuticals LP | $24.47 | 1 |
| Novo Nordisk Inc | $21.07 | 1 |
What the 2025 payments were for
- Food and Beverage$109.61 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 147 internal medicine physicians in Fremont · All internal medicine physicians in California