Larissa Chartrand, M.D.
NPI 1851715627ActiveIndividual· Internal Medicine· Fairfield, CA
Internal Medicine (M.D.) with Northbay Physicians Surgery Center, LLC and 1 other group, practicing in Fairfield, California. Their prescriptions cost Medicare Part D more than their services did: $331,376 for 3,177 claims, against $91,223 paid for services in 2024. Novo Nordisk Inc was the largest of 3 companies reporting payments in 2025, $177.02 in all, mostly food and beverage. Lists Northbay Medical Center as a hospital affiliation.
Overview
| NPI | 1851715627 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Feb 13, 2014 |
| Last updated in NPPES | Jul 7, 2025 |
| Certified by provider | Jun 24, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | ME 120869 | FL |
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 | 207 |
|---|---|
| Services billed | 1,412 across 31 procedure codes |
| Paid by Medicare | $91,223 |
Part D prescriptions in 2024
| Prescriptions (claims) | 3,177 · 7,111 30-day fills |
|---|---|
| Patients | 261 |
| Total drug cost | $331,376 |
| Generic share | 89% of claims |
Education and affiliations
| Graduation year | 2014 |
|---|---|
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical groups
- Northbay Physicians Surgery Center, LLCFairfield, CA · 324 clinicians
- Northbay Health Medical FoundationFairfield, CA · 213 clinicians
Hospital affiliation
- Northbay Medical CenterFairfield, CA
Other facilities
- Angelcare Home Health Services, LLCHome health agency · Milpitas, CA
- Ascension Healthcare ServicesHome health agency · Campbell, CA
- Healthflex Home Health ServicesHome health agency · Oakland, CA
Industry payments (Open Payments)
- 2025$177.02 · 3 payments from 3 companies
- 2024$98.27 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novo Nordisk Inc | $124.87 | 1 |
| Exact Sciences Corporation | $26.40 | 1 |
| Glaxosmithkline, LLC. | $25.75 | 1 |
What the 2025 payments were for
- Food and Beverage$177.02 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 65 internal medicine physicians in Fairfield · All internal medicine physicians in California