Ashkan Michael Zand, MD
NPI 1639599632ActiveIndividual· Internal Medicine, Endocrinology, Diabetes & Metabolism· Pasadena, TX
Internal Medicine, Endocrinology, Diabetes & Metabolism (MD) in Pasadena, Texas, trained at University of Texas Medical Branch at Galveston (class of 2014). Their prescriptions cost Medicare Part D more than their services did: $5,358,506 for 5,571 claims, against $314,213 paid for services in 2024. Corcept Therapeutics was the largest of 29 companies reporting payments in 2025, $7,107 in all, mostly consulting fees.
Overview
| NPI | 1639599632 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Apr 17, 2014 |
| Last updated in NPPES | Nov 27, 2025 |
| Certified by provider | Nov 27, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Endocrinology, Diabetes & Metabolism Primary | 207RE0101X | R1917 | TX |
| Internal Medicine | 207R00000X | R1917 | 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 - Internal Medicine (PA); Practitioner - Endocrinology (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 464 |
|---|---|
| Services billed | 5,347 across 27 procedure codes |
| Paid by Medicare | $314,213 |
Part D prescriptions in 2024
| Prescriptions (claims) | 5,571 · 12,476 30-day fills |
|---|---|
| Patients | 608 |
| Total drug cost | $5,358,506 |
| Generic share | 43% of claims |
Education and affiliations
| Medical school | University of Texas Medical Branch at Galveston |
|---|---|
| Graduation year | 2014 |
| Medicare specialty | Endocrinology |
| Secondary specialties | Internal Medicine |
Medical groups
- Amp EndocrinologyHouston, TX · 2 clinicians
- Amz Hospital ServicesHouston, TX · 2 clinicians
Hospital affiliations
- Houston Methodist Baytown HospitalBaytown, TX
- Houston Methodist HospitalHouston, TX
- Houston Methodist Sugarland HospitalSugar Land, TX
- St Luke's Patients Medical CenterPasadena, TX
Industry payments (Open Payments)
- 2025$7,107 · 120 payments from 29 companies
- 2024$5,197 · 128 payments from 22 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Corcept Therapeutics | $3,408 | 18 |
| Xeris Pharmaceuticals, Inc. | $1,170 | 8 |
| Dexcom, Inc. | $841.93 | 20 |
| Insulet Corporation | $223.34 | 4 |
| Recordati_rare_diseases_inc. | $200.69 | 4 |
What the 2025 payments were for
- Consulting Fee$3,120 · 1 payment
- Food and Beverage$3,013 · 114 payments
- Honoraria$885.00 · 2 payments
- Education$89.21 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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