Nicolas A. Melgarejo, M.D.
NPI 1386882520ActiveIndividual· Internal Medicine, Infectious Disease· San Antonio, TX
Internal Medicine, Infectious Disease (M.D.) with San Antonio Infectious Diseases Consultants, practicing in San Antonio, Texas. Their prescriptions cost Medicare Part D more than their services did: $865,397 for 523 claims, against $57,864 paid for services in 2024. Viiv Healthcare Company was the largest of 8 companies reporting payments in 2025, $944.24 in all, mostly food and beverage. Lists Baptist Medical Center and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1386882520 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jan 26, 2009 |
| Last updated in NPPES | Jun 28, 2011 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Infectious Disease Primary | 207RI0200X | N1763 | TX |
| Internal Medicine | 207R00000X | N1763 | 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 - Infectious Disease (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 281 |
|---|---|
| Services billed | 1,081 across 18 procedure codes |
| Paid by Medicare | $57,864 |
Part D prescriptions in 2024
| Prescriptions (claims) | 523 · 636 30-day fills |
|---|---|
| Patients | 76 |
| Total drug cost | $865,397 |
| Generic share | 62% of claims |
Education and affiliations
| Graduation year | 2003 |
|---|---|
| Medicare specialty | Infectious Disease |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- San Antonio Infectious Diseases ConsultantsSan Antonio, TX · 23 clinicians
Hospital affiliations
- Baptist Medical CenterSan Antonio, TX
- Christus Santa Rosa Medical CenterSan Antonio, TX
- Methodist HospitalSan Antonio, TX
- Methodist Hospital Stone OakSan Antonio, TX
- Westover Hills Baptist HospitalSan Antonio, TX
Industry payments (Open Payments)
- 2025$944.24 · 33 payments from 8 companies
- 2024$676.44 · 30 payments from 7 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Viiv Healthcare Company | $405.11 | 11 |
| Gilead Sciences, Inc. | $351.15 | 13 |
| La Jolla Pharmaceutical Company | $51.44 | 2 |
| Paratek Pharmaceuticals, Inc. | $44.23 | 2 |
| Abbvie Inc. | $30.56 | 2 |
What the 2025 payments were for
- Food and Beverage$944.24 · 33 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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