Doctor profile · Federal record
Dr. Mark Larson, M.D.
Gastroenterology Physician (CMS: Gastroenterology) · Rochester, MN
- NPI 1316910300
- Accepts Medicare
- 44 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
200 1St St Sw
Rochester, MN 559050001
(507) 284-2511
Credentials & registration
- NPI registered
- February 2006 — 20 yrs on file
- Profile last updated
- August 18, 2020
- Year of graduation
- 1982 — 44 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
- State license (1)
- Minnesota #28083
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1316910300. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
241
Distinct HCPCS
8
Medicare allowed
$28,755
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
G0500 |
Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito | 63 | 63 | $5 | |
43235 |
Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 41 | 40 | $99 | |
45385 |
Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 37 | 37 | $243 | |
45378 |
Diagnostic exam of large bowel using a flexible endoscope | 24 | 24 | $170 | |
43239 |
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 23 | 23 | $113 | |
45380 |
Biopsy of large bowel using a flexible endoscope | 21 | 21 | $161 | |
G0105 |
Colorectal cancer screening; colonoscopy on individual at high risk | 17 | 17 | $171 | |
G0121 |
Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk | 15 | 15 | $164 |
In context: peer comparison
Among 60 peers in this city , average services per provider: 34. This provider delivers 7.1× the peer median.Hospital affiliations
Frequently asked questions
What is Dr. Mark Larson's medical specialty?
Dr. Mark Larson practices Gastroenterology Physician in Rochester, MN.
Where does Dr. Mark Larson practice?
Dr. Mark Larson practices at 200 1St St Sw, Rochester, MN 559050001. Office phone: 5072842511.
What is Dr. Mark Larson's NPI?
Dr. Mark Larson's National Provider Identifier (NPI) is 1316910300, issued by NPPES.
Does Dr. Mark Larson accept Medicare assignment?
Yes. Dr. Mark Larson accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Mark Larson commonly perform?
Top Medicare-reported procedures in 2023: Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito (HCPCS G0500); Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope (HCPCS 43235); Removal of polyps or growths of large bowel using an endoscope with mechanical snare (HCPCS 45385). Source: CMS Medicare Physician & Other Practitioners file.