Physician Profile
Unclaimed ProfileAbout GERRISH
Based in Watertown, SD, Gregory Mark Gerrish, M.D. is listed in the NPI registry under general surgery. Gregory graduated from Sanford School of Medicine of University of South Dakota in 2011. Gregory is also listed as specialising in surgery and student in an organized health care education program.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Common questions
What kind of doctor is Dr. Gerrish?
Dr. Gerrish is a general surgeon in Watertown, SD. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “GENERAL SURGERY”.
NPI registry
What is Dr. Gerrish's address?
Dr. Gerrish is listed at 401 9TH AVE. NW PRAIRIE LAKES HOSPITAL, Watertown, SD 57201. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Dr. Gerrish?
The number on file is (605) 882-7000. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Dr. Gerrish?
Dr. Gerrish's National Provider Identifier is 1992097703. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. Gerrish train?
Dr. Gerrish attended Sanford School of Medicine of University of South Dakota, graduating in 2011. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Gerrish have?
Dr. Gerrish has 15 years experience. Calculated from a graduation year of 2011, reported in the CMS National Downloadable File.
CMS public data
What procedures does Dr. Gerrish perform?
According to Medicare billing data, Dr. Gerrish performs procedures including biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope, removal of polyps or growths of large bowel using an endoscope with mechanical snare and diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Gerrish's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Gerrish. If this is you, claiming it is free.
Guide.md
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (605) 882-7000
- Email not available
Practice Locations
401 9TH AVE. NW PRAIRIE LAKES HOSPITAL
Watertown, SD 57201
Procedures Most Often Billed to Medicare
432 services · 416 patients · 15 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | Procedure | 43239 |
62 |
| Removal of polyps or growths of large bowel using an endoscope with mechanical snare | Procedure | 45385 |
55 |
| Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope | Procedure | 43235 |
29 |
| Diagnostic exam of large bowel using a flexible endoscope | Procedure | 45378 |
23 |
| Biopsy of large bowel using a flexible endoscope | Procedure | 45380 |
18 |
| Balloon dilation of esophagus, stomach, and/or upper small bowel using a flexible endoscope, less than 3.0 cm | Procedure | 43249 |
15 |
| Destruction of polyp or growth of large bowel using a flexible endoscope | Procedure | 45388 |
14 |
| Removal of gallbladder using an endoscope | Procedure | 47562 |
13 |
| Insertion of central venous tube with port (5 years or older) | Procedure | 36561 |
12 |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
67 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other general surgeons at this location 1
Same specialty, same street address — most likely the same department or group.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other general surgeons in Watertown 6
Same specialty, same city.
More connections — 24 related providers in 3 groups
Trained at Sanford School of Medicine of University of South Dakota 8
Other providers in the same specialty who trained at the same institution.
Class of 2011 at Sanford School of Medicine of University of South Dakota 8
Providers who graduated from the same medical school in the same year.
Also performs Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope 8
Providers in SD who bill this service to Medicare most often.
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.