Johanna D. Larrazabal, MD
NPI 1588632574ActiveIndividual· Internal Medicine· Williamsburg, VA
Internal Medicine (MD) with Riverside Physician Services Inc, practicing in Williamsburg, Virginia. Their prescriptions cost Medicare Part D more than their services did: $722,932 for 9,268 claims, against $207,928 paid for services in 2024. Exact Sciences Corporation was the largest of 9 companies reporting payments in 2025, $331.14 in all, mostly food and beverage. Lists Riverside Doctors' Hospital of Williamsburg and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1588632574 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Mar 8, 2006 |
| Last updated in NPPES | Aug 17, 2015 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 0101238426 | VA |
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 (VA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 412 |
|---|---|
| Services billed | 6,863 across 102 procedure codes |
| Paid by Medicare | $207,928 |
Part D prescriptions in 2024
| Prescriptions (claims) | 9,268 · 20,388 30-day fills |
|---|---|
| Patients | 572 |
| Total drug cost | $722,932 |
| Generic share | 89% of claims |
Education and affiliations
| Graduation year | 2000 |
|---|---|
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Riverside Physician Services IncWilliamsburg, VA · 797 clinicians
Hospital affiliations
- Riverside Doctors' Hospital of WilliamsburgWilliamsburg, VA
- Riverside Regional Medical CenterNewport News, VA
- Riverside Walter Reed HospitalGloucester, VA
- Sentara Careplex HospitalHampton, VA
- Sentara Williamsburg Regional Medical CenterWilliamsburg, VA
Other facilities
- Brookside Home Health, An Amedisys CompanyHome health agency · Williamsburg, VA
- Commonwealth Home CareHome health agency · Portsmouth, VA
- Riverside Home HealthHome health agency · Gloucester, VA
- Sentara Home Care Services-WilliamsburgHome health agency · Williamsburg, VA
Industry payments (Open Payments)
- 2025$331.14 · 13 payments from 9 companies
- 2024$494.61 · 16 payments from 10 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Exact Sciences Corporation | $96.12 | 1 |
| Pfizer Inc. | $72.52 | 3 |
| Amgen Inc. | $40.36 | 2 |
| Phathom Pharmaceuticals, Inc. | $26.47 | 2 |
| Mannkind Corporation | $26.11 | 1 |
What the 2025 payments were for
- Food and Beverage$331.14 · 13 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 49 internal medicine physicians in Williamsburg · All internal medicine physicians in Virginia