Doctor profile · Federal record
Dr. Ian Grimes, M.D.
Gastroenterology Physician (CMS: Gastroenterology) · Madison, WI
- NPI 1275737165
- Accepts Medicare
- 19 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
750 University Row
Madison, WI 537051311
(608) 890-5000 - Mailing address
-
7974 Uw Health CT
Middleton, WI 535625531
Credentials & registration
- NPI registered
- June 2007 — 19 yrs on file
- Profile last updated
- January 27, 2021
- Year of graduation
- 2007 — 19 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
- State license (1)
- Wisconsin #52636
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1275737165. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
419
Distinct HCPCS
9
Medicare allowed
$56,046
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
45380 |
Biopsy of large bowel using a flexible endoscope | 152 | 151 | $95 | |
45385 |
Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 116 | 116 | $230 | |
43239 |
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 37 | 37 | $90 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 32 | 28 | $90 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 22 | 22 | $62 | |
43239 |
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 17 | 16 | $84 | |
43235 |
Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 16 | 16 | $102 | |
G0105 |
Colorectal cancer screening; colonoscopy on individual at high risk | 14 | 14 | $168 | |
45380 |
Biopsy of large bowel using a flexible endoscope | 13 | 13 | $144 |
In context: peer comparison
Among 20 peers in this city , average services per provider: 38. This provider delivers 11× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
655
Patients
287
Total drug cost
$2,186,437
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Gavilyte-C (Peg3350/Sod Sulf,bicarb,cl/Kcl) | Brand | 188 | 182 | $3,660 |
| Humira(Cf) Pen (Adalimumab) | Brand | 71 | 0 | $966,268 |
| Mesalamine | Generic | 51 | 12 | $35,267 |
| Azathioprine | Generic | 50 | 11 | $4,417 |
| Stelara (Ustekinumab) | Brand | 42 | 0 | $1,153,020 |
| Balsalazide Disodium | Generic | 37 | 0 | $11,716 |
| Diphenoxylate-Atropine (Diphenoxylate Hcl/Atropine) | Brand | 36 | 14 | $2,946 |
| Omeprazole | Generic | 31 | 14 | $810 |
| Gavilyte-G (Peg3350/Sod Sulf,bicarb,cl/Kcl) | Brand | 26 | 26 | $498 |
| Prednisone | Generic | 25 | 11 | $327 |
Hospital affiliations
Frequently asked questions
What is Dr. Ian Grimes's medical specialty?
Dr. Ian Grimes practices Gastroenterology Physician in Madison, WI.
Where does Dr. Ian Grimes practice?
Dr. Ian Grimes practices at 750 University Row, Madison, WI 537051311. Office phone: 6088905000.
What is Dr. Ian Grimes's NPI?
Dr. Ian Grimes's National Provider Identifier (NPI) is 1275737165, issued by NPPES.
Does Dr. Ian Grimes accept Medicare assignment?
Yes. Dr. Ian Grimes accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Ian Grimes commonly perform?
Top Medicare-reported procedures in 2023: Biopsy of large bowel using a flexible endoscope (HCPCS 45380); Removal of polyps or growths of large bowel using an endoscope with mechanical snare (HCPCS 45385); Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (HCPCS 43239). Source: CMS Medicare Physician & Other Practitioners file.