Ann M. Mass, MD
NPI 1598769358ActiveIndividual· Internal Medicine· Aspen, CO
Opted out of Medicare from January 2024 to January 2028. Internal Medicine (MD) in Aspen, Colorado, licensed in CO, with an NPI issued in June 2005. Part D covered 2,713 prescriptions written in 2024, 86% of them generic. Amgen Inc. reported $15.33 in payments in 2024, mostly food and beverage.
Overview
| NPI | 1598769358 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 9, 2005 |
| Last updated in NPPES | Jan 26, 2016 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | CO21624 | CO |
| Specialist | 174400000X | 21624 | CO |
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) | Not in the public enrollment file of Oct 1, 2026 |
|---|---|
| Opt-out | Opted out Jan 1, 2024 – Jan 1, 2028 |
| Can order and refer | Yes |
During an opt-out period the provider sees Medicare patients only under private contracts, and Medicare does not pay claims for their services.
Part D prescriptions in 2024
| Prescriptions (claims) | 2,713 · 5,966 30-day fills |
|---|---|
| Patients | 280 |
| Total drug cost | $312,256 |
| Generic share | 86% of claims |
Industry payments (Open Payments)
- 2024$15.33 · 1 payment from 1 company
Top paying companies in 2024
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $15.33 | 1 |
What the 2024 payments were for
- Food and Beverage$15.33 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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