Christopher David Vercammen-Grandjean, MD
NPI 1942543699ActiveIndividual· Internal Medicine· Orange, CA
Internal Medicine (MD) in Orange, California, trained at University of California, San Francisco School of Medicine (class of 2013). Their prescriptions cost Medicare Part D more than their services did: $955,882 for 8,130 claims, against $42,597 paid for services in 2024.
Overview
| NPI | 1942543699 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Apr 1, 2013 |
| Last updated in NPPES | Nov 3, 2026 |
| Certified by provider | Nov 3, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A135720 | 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); Practitioner - Internal Medicine (FL); Practitioner - Internal Medicine (NC) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 182 |
|---|---|
| Services billed | 630 across 54 procedure codes |
| Paid by Medicare | $42,597 |
Part D prescriptions in 2024
| Prescriptions (claims) | 8,130 · 17,815 30-day fills |
|---|---|
| Patients | 647 |
| Total drug cost | $955,882 |
| Generic share | 87% of claims |
Education and affiliations
| Medical school | University of California, San Francisco School of Medicine |
|---|---|
| Graduation year | 2013 |
| Medicare specialty | Internal Medicine |
Medical group
- Pouya Afshar MD IncSan Diego, CA · 19 clinicians
Other facilities
- Apex Home Health Care ServicesHome health agency · Santa Ana, CA
- Remedy Home Health CareHome health agency · Northridge, CA
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other internal medicine physicians in Orange
- 1043424575
- 1043848732
- 1053998989
- 1083077283
- 1093732992
- 1104171925
- 1114505781
- 1134224611
- 1154741254
- 1164601589
- 1205082161
- 1225358989
All 224 internal medicine physicians in Orange · All internal medicine physicians in California