David Alster
NPI 1164457339ActiveIndividual· Internal Medicine, Endocrinology, Diabetes & Metabolism· Tucson, AZ
Internal Medicine, Endocrinology, Diabetes & Metabolism in Tucson, Arizona, trained at Tulane University School of Medicine (class of 1982). Their prescriptions cost Medicare Part D more than their services did: $5,351,940 for 3,853 claims, against $244,671 paid for services in 2024. Amgen Inc. was the largest of 4 companies reporting payments in 2025, $65.43 in all, mostly food and beverage.
Overview
| NPI | 1164457339 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Sole proprietor | No |
| NPI issued | Jul 12, 2006 |
| Last updated in NPPES | Oct 22, 2021 |
| Certified by provider | Oct 22, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Endocrinology, Diabetes & Metabolism Primary | 207RE0101X | 22096 | AZ |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Endocrinology (AZ) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 1,449 |
|---|---|
| Services billed | 3,527 across 24 procedure codes |
| Paid by Medicare | $244,671 |
Part D prescriptions in 2024
| Prescriptions (claims) | 3,853 · 9,908 30-day fills |
|---|---|
| Patients | 826 |
| Total drug cost | $5,351,940 |
| Generic share | 60% of claims |
Education and affiliations
| Medical school | Tulane University School of Medicine |
|---|---|
| Graduation year | 1982 |
| Medicare specialty | Endocrinology |
Medical group
- Tucson Endocrine Associates PLLCTucson, AZ · 4 clinicians
Hospital affiliation
- Tucson Medical CenterTucson, AZ
Industry payments (Open Payments)
- 2025$65.43 · 4 payments from 4 companies
- 2024$129.91 · 7 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $18.13 | 1 |
| Sequel Med Tech, LLC | $16.50 | 1 |
| Beta Bionics, Inc. | $15.60 | 1 |
| Astellas Pharma US Inc | $15.20 | 1 |
What the 2025 payments were for
- Food and Beverage$65.43 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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