Calvin L. Day Jr., M.D.
NPI 1831379692ActiveIndividual· Dermatology, MOHS-Micrographic Surgery· San Antonio, TX
Dermatology, MOHS-Micrographic Surgery (M.D.) in San Antonio, Texas, trained at University of Texas Southwestern Medical School at Dallas (class of 1976). 481 Medicare patients in 2024, $289,986 paid; nearly all of their 835 Part D prescriptions were generic (98%). Janssen Biotech, Inc. reported $94.99 in payments in 2024, mostly education.
Overview
| NPI | 1831379692 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Nov 9, 2007 |
| Last updated in NPPES | Aug 25, 2023 |
| Certified by provider | Aug 25, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Dermatology, MOHS-Micrographic Surgery Primary | 207ND0101X | G1883 | TX |
| Dermatology, Procedural Dermatology | 207NS0135X | G1883 | TX |
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 (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 481 |
|---|---|
| Services billed | 3,578 across 110 procedure codes |
| Paid by Medicare | $289,986 |
Part D prescriptions in 2024
| Prescriptions (claims) | 835 · 1,082 30-day fills |
|---|---|
| Patients | 309 |
| Total drug cost | $23,910 |
| Generic share | 98% of claims |
Education and affiliations
| Medical school | University of Texas Southwestern Medical School at Dallas |
|---|---|
| Graduation year | 1976 |
| Medicare specialty | Dermatology |
Industry payments (Open Payments)
- 2024$94.99 · 1 payment from 1 company
Top paying companies in 2024
| Company | Amount | Payments |
|---|---|---|
| Janssen Biotech, Inc. | $94.99 | 1 |
What the 2024 payments were for
- Education$94.99 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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