Doctor profile · Federal record
Dr. Mary Riwes, D.O.
Medical Oncology Physician (CMS: Medical Oncology) · Ann Arbor, MI
- NPI 1750548434
- Accepts Medicare
- 19 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
1500 E Medical Center Dr
Ann Arbor, MI 481095000
(734) 936-4000 - Mailing address
-
3621 S State St
Ann Arbor, MI 481081633
Credentials & registration
- NPI registered
- May 2008 — 18 yrs on file
- Profile last updated
- December 2, 2020
- Year of graduation
- 2007 — 19 yrs since
- Specialty taxonomy
- 207RX0202X — NUCC code
- State license (1)
- Michigan #5101020742
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1750548434. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
131
Distinct HCPCS
2
Medicare allowed
$16,556
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99233 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 98 | 15 | $121 | |
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 33 | 13 | $142 |
In context: peer comparison
Among 20 peers in Ann Arbor Medical Oncology Physician, average services per provider: 74. This provider delivers 1.8× the peer median.Open Payments
Industry payments received
All-time total
$1,201
Transactions
3
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| National Marrow Donor Program | 3 | $1,201.00 |
By nature of payment
Hospital affiliations
Frequently asked questions
What is Dr. Mary Riwes's medical specialty?
Dr. Mary Riwes practices Medical Oncology Physician in Ann Arbor, MI.
Where does Dr. Mary Riwes practice?
Dr. Mary Riwes practices at 1500 E Medical Center Dr, Ann Arbor, MI 481095000. Office phone: 7349364000.
What is Dr. Mary Riwes's NPI?
Dr. Mary Riwes's National Provider Identifier (NPI) is 1750548434, issued by NPPES.
Does Dr. Mary Riwes accept Medicare assignment?
Yes. Dr. Mary Riwes accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Mary Riwes commonly perform?
Top Medicare-reported procedures in 2023: Subsequent hospital care with moderate levelof medical decision making (HCPCS 99233); Established patient office or other outpatient visit (HCPCS 99215). Source: CMS Medicare Physician & Other Practitioners file.