David A. Denenholz, M.D.
NPI 1801837331ActiveIndividual· Specialist· Pasadena, CA
Specialist (M.D.) in Pasadena, California, trained at University of California, Geffen School of Medicine (class of 1977). 648 Medicare patients in 2024, $222,301 paid; nearly all of their 367 Part D prescriptions were generic (98%). Genzyme Corporation was the largest of 15 companies reporting payments in 2025, $1,033 in all, mostly food and beverage.
Overview
| NPI | 1801837331 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jun 8, 2006 |
| Last updated in NPPES | Jul 13, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Specialist Primary | 174400000X | G37998 | 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 - Dermatology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 648 |
|---|---|
| Services billed | 4,059 across 32 procedure codes |
| Paid by Medicare | $222,301 |
Part D prescriptions in 2024
| Prescriptions (claims) | 367 · 399 30-day fills |
|---|---|
| Patients | 196 |
| Total drug cost | $88,423 |
| Generic share | 98% of claims |
Education and affiliations
| Medical school | University of California, Geffen School of Medicine |
|---|---|
| Graduation year | 1977 |
| Medicare specialty | Dermatology |
Medical group
- David Denenholz MD IncPasadena, CA · 4 clinicians
Industry payments (Open Payments)
- 2025$1,033 · 38 payments from 15 companies
- 2024$680.36 · 21 payments from 10 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Genzyme Corporation | $331.43 | 8 |
| Regeneron Healthcare Solutions, Inc. | $118.43 | 3 |
| Leo Pharma Inc. | $111.61 | 5 |
| Incyte Corporation | $81.99 | 3 |
| Galderma Laboratories, L.P. | $63.47 | 3 |
What the 2025 payments were for
- Food and Beverage$1,033 · 38 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 77 Specialist providers in Pasadena · All Specialist providers in California