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Edit this profileAt a glance
- 401 9Th Ave. Nw, Prairie Lakes Hospital, Watertown, SD 57201
About Dr. Gerrish
Based in Watertown, SD, Gregory M. 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 specializing in surgery and student in an organized health care education program. Medicare claims data shows Gregory provided 432 services to 416 patients. The services billed most often include established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more, biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope, and removal of polyps or growths of large bowel using an endoscope with mechanical snare. NPI 1992097703 identifies this record in the national registry.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (605) 882-7000
- Email not available
Practice Locations
401 9TH AVE. NW PRAIRIE LAKES HOSPITAL
Watertown, SD 57201
Conditions Commonly Evaluated or Treated
Within General Surgery generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
Anorectal
- Anal fissure
- Anal fistula
- Hemorrhoids
- Perianal abscess
- Rectal prolapse
Appendix, bowel, and emergency
- Diverticulitis
- Intra-abdominal abscess
- Mesenteric ischemia
- Peritonitis
Gallbladder and biliary
- Acute gallbladder inflammation
- Biliary dyskinesia
Hernia and abdominal wall
- Belly-button hernia
- Femoral hernia
- Groin hernia
- Hiatal hernia
- Incisional hernia
- Ventral hernia
Skin and soft tissue
- Epidermoid cyst
- Hidradenitis suppurativa
- Lipoma
- Skin and soft-tissue abscess
- Soft-tissue mass
Abdominal
Abdominal wall
Breast
- Benign breast disease
- Breast abscess
- Gynecomastia
Colorectal
Digestive
- Acid reflux
- Acute pancreatitis
- Bleeding Stomach Ulcer
- Bowel Fistula
- Gastroparesis
- Swallowing difficulties
Emergency surgery
Endocrine
Gastrointestinal
Hernia
- Diaphragmatic hernia
- Sports Hernia
- Strangulated Hernia
Infections
Lymphatic
Oncology
Procedures & services
Most searched procedures
Bowel and emergency abdominal
- Colon resection
- Exploratory laparoscopy
- Exploratory laparotomy
- Repair of perforated peptic ulcer
- Small-bowel resection
- Surgery for bowel obstruction
- Surgical drainage of abdominal abscess
- Surgical lysis of adhesions
Gallbladder and appendix
- Gallbladder removal
Hernia repair
- Laparoscopic groin-hernia repair
- Robotic hernia repair
Skin and soft tissue
- Incision and drainage of an abscess
- Lipoma removal
- Removal of a soft-tissue mass
Abdominal surgery
Abdominal wall
- Abdominal Muscle Separation Repair
Access and nutrition
- Jejunostomy feeding-tube placement
Anorectal
- Anal fistula surgery
- Drainage of anal abscess
- Hemorrhoid removal
- Rubber-band ligation of hemorrhoids
- Surgery for chronic anal fissure
Biopsy
Breast surgery
- Axillary lymph-node dissection
- Excisional biopsy of a breast mass
- Mastectomy
- Sentinel lymph-node biopsy
Breast Surgery
Colorectal
Colorectal surgery
- Colostomy Surgery
- Ileostomy Surgery
- Ostomy reversal
Digestive procedures
- Achalasia Surgery
- Acid reflux surgery
Endocrine surgery
- Partial Thyroid Removal
Gastrointestinal
Hernia surgery
- Sports hernia surgery
Skin & Soft Tissue
Surgical Oncology
Surgical procedures
Vascular Access
Wound care
- Wound cleaning and debridement
Procedures Most Often Billed to Medicare
432 services · 416 patients · 15 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | Procedure | 43239 |
62 | More than most peers in General Surgery |
| Removal of polyps or growths of large bowel using an endoscope with mechanical snare | Procedure | 45385 |
55 | More often than most peers in General Surgery |
| Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope | Procedure | 43235 |
29 | More often than most peers in General Surgery |
| Diagnostic exam of large bowel using a flexible endoscope | Procedure | 45378 |
23 | More often than most peers in General Surgery |
| Biopsy of large bowel using a flexible endoscope | Procedure | 45380 |
18 | As often as other peers in General Surgery |
| Balloon dilation of esophagus, stomach, and/or upper small bowel using a flexible endoscope, less than 3.0 cm | Procedure | 43249 |
15 | Less often than most peers in General Surgery |
| Destruction of polyp or growth of large bowel using a flexible endoscope | Procedure | 45388 |
14 | Less often than most peers in General Surgery |
| Removal of gallbladder using an endoscope | Procedure | 47562 |
13 | Less often than most peers in General Surgery |
| Insertion of central venous tube with port (5 years or older) | Procedure | 36561 |
12 | Less often than most peers in General Surgery |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
67 | More often than most peers in General Surgery |
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 5
Same specialty, same city.
More connections — 22 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 6
Providers in SD who bill this service to Medicare most often.
Common questions
What kind of doctor is Gregory M. Gerrish?
Gregory M. Gerrish is a general surgeon in Watertown, SD. That is the designation recorded for this NPI in the federal registry, where it is listed as “General Surgery”.
NPI registry
What is Gregory M. Gerrish's address?
Gregory M. 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 Gregory M. Gerrish?
The number on file is (605) 882-7000. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for Gregory M. Gerrish?
Gregory M. 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 Gregory M. Gerrish train?
Gregory M. 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 Gregory M. Gerrish have?
Gregory M. 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 Gregory M. Gerrish perform?
According to Medicare billing data, Gregory M. 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 Gregory M. Gerrish's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Gregory M. Gerrish. If this is you, claiming it is free.
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