Doctor profile · Federal record
Dr. Christopher Sonnenday, M.D.
Surgery Physician (CMS: General Surgery) · Ann Arbor, MI
- NPI 1639103740
- Accepts Medicare
- 29 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
1500 East Medical Center Dr, 2Nd Floor Taubman Ctr Recp F
Ann Arbor, MI 481095332
(734) 936-5738 - Mailing address
-
3621 S State St, 700 Kms Place
Ann Arbor, MI 48108
Credentials & registration
- NPI registered
- July 2006 — 20 yrs on file
- Profile last updated
- April 19, 2012
- Year of graduation
- 1997 — 29 yrs since
- Specialty taxonomy
- 208600000X — NUCC code
- State license (1)
- Michigan #4301088731
- Medicaid
- MD #699801100
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1639103740. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
283
Distinct HCPCS
9
Medicare allowed
$52,451
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 128 | 36 | $81 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 39 | 30 | $67 | |
99231 |
Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes | 26 | 14 | $50 | |
99239 |
Hospital discharge day management, more than 30 minutes | 20 | 19 | $112 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 17 | 17 | $133 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 16 | 14 | $95 | |
99238 |
Hospital discharge day management, 30 minutes or less | 13 | 12 | $82 | |
50323 |
Preparation of donor kidney for transplantation | 12 | 12 | $153 | |
50360 |
Transplantation of donor kidney | 12 | 12 | $2,442 |
In context: peer comparison
Among 18 peers in this city , average services per provider: 24. This provider delivers 12× the peer median.Open Payments
Industry payments received
All-time total
$2,757
Transactions
3
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| TransMedics, Inc. | 3 | $2,757.00 |
By nature of payment
Hospital affiliations
Frequently asked questions
What is Dr. Christopher Sonnenday's medical specialty?
Dr. Christopher Sonnenday practices Surgery Physician in Ann Arbor, MI.
Where does Dr. Christopher Sonnenday practice?
Dr. Christopher Sonnenday practices at 1500 East Medical Center Dr, Ann Arbor, MI 481095332. Office phone: 7349365738.
What is Dr. Christopher Sonnenday's NPI?
Dr. Christopher Sonnenday's National Provider Identifier (NPI) is 1639103740, issued by NPPES.
Does Dr. Christopher Sonnenday accept Medicare assignment?
Yes. Dr. Christopher Sonnenday accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Christopher Sonnenday commonly perform?
Top Medicare-reported procedures in 2023: Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232); Established patient office or other outpatient visit (HCPCS 99213); Subsequent hospital care with straightforward or low level of medical decision making (HCPCS 99231). Source: CMS Medicare Physician & Other Practitioners file.