Cristina Alvardo Nieves, M.D.
NPI 1942561246ActiveIndividual· Internal Medicine, Endocrinology, Diabetes & Metabolism· Ann Arbor, MI
Internal Medicine, Endocrinology, Diabetes & Metabolism (M.D.) in Ann Arbor, Michigan, trained at University of Puerto Rico School of Medicine (class of 2012). Their prescriptions cost Medicare Part D more than their services did: $434,733 for 894 claims, against $11,640 paid for services in 2024.
Overview
| NPI | 1942561246 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jun 4, 2012 |
| Last updated in NPPES | Feb 11, 2020 |
| Certified by provider | Feb 11, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Endocrinology, Diabetes & Metabolism Primary | 207RE0101X | 4301113433 | MI |
| Internal Medicine | 207R00000X | 251966 | MA |
| Internal Medicine | 207R00000X | 4301113433 | MI |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Endocrinology (MI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 91 |
|---|---|
| Services billed | 190 across 11 procedure codes |
| Paid by Medicare | $11,640 |
Part D prescriptions in 2024
| Prescriptions (claims) | 894 · 2,283 30-day fills |
|---|---|
| Patients | 127 |
| Total drug cost | $434,733 |
| Generic share | 41% of claims |
Education and affiliations
| Medical school | University of Puerto Rico School of Medicine |
|---|---|
| Graduation year | 2012 |
| Medicare specialty | Endocrinology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Regents of the University of MichiganAnn Arbor, MI · 3,346 clinicians
Hospital affiliation
- University of Michigan Health SystemAnn Arbor, MI
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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