Doctor profile · Federal record
Dr. James Riddell, MD
Infectious Disease Physician (CMS: Infectious Disease) · Internal Medicine Physician · Ann Arbor, MI
- NPI 1205911161
- Accepts Medicare
- 32 yrs in practice
- Male
- 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
- October 2006 — 20 yrs on file
- Profile last updated
- November 25, 2025
- Year of graduation
- 1994 — 32 yrs since
- Specialty taxonomy
- 207RI0200X — NUCC code
- State license (1)
- Michigan #4301063507
- Medicaid
- MI #4117333
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1205911161. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
163
Distinct HCPCS
4
Medicare allowed
$16,707
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 77 | 52 | $99 | |
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 39 | 22 | $81 | |
99233 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 27 | 17 | $121 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 20 | 20 | $133 |
In context: peer comparison
Among 14 peers in Ann Arbor Infectious Disease Physician, average services per provider: 43. This provider delivers 3.8× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
884
Patients
33
Total drug cost
$2,513,628
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Biktarvy (Bictegrav/Emtricit/Tenofov Ala) | Brand | 212 | 22 | $837,237 |
| Symtuza (Darunavir/Cob/Emtri/Tenof Alaf) | Brand | 105 | 0 | $586,871 |
| Tivicay (Dolutegravir Sodium) | Brand | 101 | 0 | $276,376 |
| Descovy (Emtricitabine/Tenofov Alafenam) | Brand | 59 | 0 | $156,357 |
| Odefsey (Emtricitab/Rilpiviri/Tenof Ala) | Brand | 47 | 0 | $159,113 |
| Acyclovir | Generic | 42 | 0 | $2,356 |
| Doxycycline Hyclate | Generic | 40 | 11 | $1,667 |
| Genvoya (Elviteg/Cob/Emtri/Tenof Alafen) | Brand | 40 | 0 | $163,509 |
| Omeprazole | Generic | 39 | 0 | $1,053 |
| Prezcobix (Darunavir/Cobicistat) | Brand | 39 | 0 | $114,664 |
Hospital affiliations
Frequently asked questions
What is Dr. James Riddell's medical specialty?
Dr. James Riddell practices Infectious Disease Physician in Ann Arbor, MI.
Where does Dr. James Riddell practice?
Dr. James Riddell practices at 1500 E Medical Center Dr, Ann Arbor, MI 481095000. Office phone: 7349364000.
What is Dr. James Riddell's NPI?
Dr. James Riddell's National Provider Identifier (NPI) is 1205911161, issued by NPPES.
Does Dr. James Riddell accept Medicare assignment?
Yes. Dr. James Riddell accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. James Riddell commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232); Subsequent hospital care with moderate levelof medical decision making (HCPCS 99233). Source: CMS Medicare Physician & Other Practitioners file.