David S. Charman, M.D.
NPI 1346228954ActiveIndividual· Internal Medicine· Buffalo Grove, IL
Internal Medicine (M.D.) in Buffalo Grove, Illinois, trained at University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) (class of 1985). Their prescriptions cost Medicare Part D more than their services did: $301,494 for 2,906 claims, against $65,582 paid for services in 2024. Pfizer Inc. was the largest of 15 companies reporting payments in 2025, $1,245 in all, mostly food and beverage.
Overview
| NPI | 1346228954 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jan 4, 2006 |
| Last updated in NPPES | Apr 26, 2021 |
| Certified by provider | Apr 26, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 036075999 | IL |
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 - Internal Medicine (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 147 |
|---|---|
| Services billed | 829 across 30 procedure codes |
| Paid by Medicare | $65,582 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,906 · 6,656 30-day fills |
|---|---|
| Patients | 192 |
| Total drug cost | $301,494 |
| Generic share | 87% of claims |
Education and affiliations
| Medical school | University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) |
|---|---|
| Graduation year | 1985 |
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Endeavor Health Medical GroupEvanston, IL · 3,350 clinicians
Hospital affiliation
- Northwest Community Hospital 1Arlington Heights, IL
Other facilities
- Residential Home HealthHome health agency · Schaumburg, IL
Industry payments (Open Payments)
- 2025$1,245 · 55 payments from 15 companies
- 2024$1,234 · 56 payments from 15 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Pfizer Inc. | $326.92 | 14 |
| Amgen Inc. | $195.12 | 10 |
| Novo Nordisk Inc | $143.68 | 7 |
| Axsome Therapeutics, Inc. | $124.82 | 5 |
| Lilly USA, LLC | $103.66 | 4 |
What the 2025 payments were for
- Food and Beverage$1,245 · 55 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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