Christopher Sonnenday, M.D.
NPI 1639103740ActiveIndividual· Surgery· Ann Arbor, MI
Surgery (M.D.) in Ann Arbor, Michigan, trained at Vanderbilt University School of Medicine (class of 1997). In 2024 Medicare paid $64,358 for 87 patients, and Part D covered 69 of their prescriptions, 87% of them generic. Intuitive Surgical, Inc. reported $1,536 in payments in 2025, mostly education.
Overview
| NPI | 1639103740 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jul 11, 2006 |
| Last updated in NPPES | Apr 19, 2012 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Surgery Primary | 208600000X | 4301088731 | 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 - General Surgery (MI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 87 |
|---|---|
| Services billed | 210 across 35 procedure codes |
| Paid by Medicare | $64,358 |
Part D prescriptions in 2024
| Prescriptions (claims) | 69 · 82 30-day fills |
|---|---|
| Patients | 27 |
| Total drug cost | $47,439 |
| Generic share | 87% of claims |
Education and affiliations
| Medical school | Vanderbilt University School of Medicine |
|---|---|
| Graduation year | 1997 |
| Medicare specialty | General Surgery |
| Secondary specialties | Surgical Oncology |
| 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)
- 2025$1,536 · 2 payments from 1 company
- 2024$2,757 · 3 payments from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Intuitive Surgical, Inc. | $1,536 | 2 |
What the 2025 payments were for
- Education$1,500 · 1 payment
- Food and Beverage$36.30 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Surgery providers in Ann Arbor
- 1023043296
- 1063592350
- 1861020489
- 1033470125
- 1720385560
- 1639259260
- 1538267836
- 1447358718
- 1104924372
- 1790896124
- 1235238650
- 1588605778