Carsten R. Hamann, MD
NPI 1538546957ActiveIndividual· Dermatology· Phoenix, AZ
Dermatology (MD) in Phoenix, Arizona, trained at Loma Linda University School of Medicine (class of 2015). 841 Medicare patients in 2024, $450,867 paid; nearly all of their 756 Part D prescriptions were generic (98%). Regeneron Healthcare Solutions, Inc. was the largest of 24 companies reporting payments in 2025, $228,357 in all, mostly speaking and faculty fees.
Overview
| NPI | 1538546957 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | May 5, 2015 |
| Last updated in NPPES | Dec 29, 2025 |
| Certified by provider | Dec 29, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Dermatology Primary | 207N00000X | 62905 | AZ |
| Dermatology | 207N00000X | 20079 | NH |
| Dermatology | 207N00000X | 145153 | CA |
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 - Dermatology (AZ); Practitioner - Dermatology (NH) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 841 |
|---|---|
| Services billed | 12,912 across 81 procedure codes |
| Paid by Medicare | $450,867 |
Part D prescriptions in 2024
| Prescriptions (claims) | 756 · 865 30-day fills |
|---|---|
| Patients | 388 |
| Total drug cost | $89,231 |
| Generic share | 98% of claims |
Education and affiliations
| Medical school | Loma Linda University School of Medicine |
|---|---|
| Graduation year | 2015 |
| Medicare specialty | Dermatology |
Medical groups
- Mary Hitchcock Memorial HospitalManchester, NH · 1,280 clinicians
- Saguaro Dermatology Associates LLCMesa, AZ · 13 clinicians
Hospital affiliation
- Mary Hitchcock Memorial HospitalLebanon, NH
Industry payments (Open Payments)
- 2025$228,357 · 269 payments from 24 companies
- 2024$111,377 · 171 payments from 16 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Regeneron Healthcare Solutions, Inc. | $91,011 | 59 |
| Genzyme Corporation | $88,210 | 40 |
| Pfizer Inc. | $27,728 | 22 |
| Galderma Laboratories, L.P. | $10,067 | 23 |
| Leo Pharma Inc. | $3,345 | 17 |
What the 2025 payments were for
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$170,690 · 32 payments
- Consulting Fee$40,175 · 11 payments
- Travel and Lodging$10,812 · 32 payments
- Food and Beverage$6,615 · 193 payments
- Education$65.99 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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