Dr. Gregory M. Gerrish
- Gender: Male
- Experience: 10 years
- Graduated from: Sanford School Of Medicine Of University Of South Dakota
- Graduation year: 2011
- Sole propriator: No
- NPI: 1992097703
Dr. Gregory M. Gerrish M.D.
Surgeon
He is located at 401 9th Avenue Northwest Prairie Lakes Hospital in Watertown, SD 57201. Can help patients with the following: Anal Fissure, Diverticulosis, Enlarged Spleen, Gallstones, Lymphedema, Pancreatitis. His National Provider Identifier (NPI) number is 1992097703. Appointment can be made via the phone number (605) 882-7000. He is affiliated with 3 hospitals.
Conditions treated
Dr. Gregory Mark Gerrish, being an surgeon, treats the following conditions. Please be advised that this list may not be complete. For the full list of conditions treated, consult directly with Dr. Gregory M. Gerrish.
- Achalasia
- Anal Fissure
- Appendicitis
- Boils
- Cancer
- Colon Cancer
- Crohn's Disease
- Cyst
- Diverticulosis
- Enlarged Spleen
- Esophageal Cancer
- Gallstones
- Gangrene
- Heart Disease
- Hemorrhoids
- Hernia
- Inflammatory Bowel Disease (IBD)
- Lymphedema
- Pancreatitis
- Peptic Ulcer
- Pilonidal Cyst
- Sebaceous Cyst
- Ulcerative Colitis
Procedures Performed by Dr. Gregory M. Gerrish
ACA Marketplace (Obamacare/HealthCare.gov) plan networks
Insurers selling ACA Marketplace (HealthCare.gov) plans list Dr. Gregory M. Gerrish as in-network for the following 2026 plans.
Health plans
Avera Health Plans
Network data as of Jan 23, 2026, as reported by the insurer.
Show all 23 plans from Avera Health Plans
| Plan | Plan type | Network tier | New patients |
|---|---|---|---|
| ConnectPlus $0 Gold (2 plan variants) | PPO · Gold | Commercial | Accepting new patients |
| ConnectPlus $0 Silver (2 plan variants) | PPO · Silver | Commercial | Accepting new patients |
| ConnectPlus $10,600 HSA Eligible HDHP (2 plan variants) | PPO · Catastrophic | Commercial | Accepting new patients |
| ConnectPlus $1800 (2 plan variants) | PPO · Gold | Commercial | Accepting new patients |
| ConnectPlus $4500 (2 plan variants) | PPO · Silver | Commercial | Accepting new patients |
| ConnectPlus $6500 HSA Eligible HDHP (2 plan variants) | PPO · Expanded Bronze | Commercial | Accepting new patients |
| ConnectPlus $7500 HSA Eligible HDHP (2 plan variants) | PPO · Expanded Bronze | Commercial | Accepting new patients |
| ConnectPlus MyWeighForward $2000 (2 plan variants) | PPO · Gold | Commercial | Accepting new patients |
| ConnectPlus MyWeighForward $6000 (2 plan variants) | PPO · Silver | Commercial | Accepting new patients |
| ConnectPlus Standard $2000 (2 plan variants) | PPO · Gold | Commercial | Accepting new patients |
| ConnectPlus Standard $6000 (2 plan variants) | PPO · Silver | Commercial | Accepting new patients |
| ConnectPlus Standard $7500 HSA Eligible HDHP (2 plan variants) | PPO · Expanded Bronze | Commercial | Accepting new patients |
| DirectConnect $0 Gold | HMO · Gold | Direct | Accepting new patients |
| DirectConnect $0 Silver | HMO · Silver | Direct | Accepting new patients |
| DirectConnect $1800 | HMO · Gold | Direct | Accepting new patients |
| DirectConnect $4500 | HMO · Silver | Direct | Accepting new patients |
| DirectConnect $6500 HSA Eligible HDHP | HMO · Expanded Bronze | Direct | Accepting new patients |
| DirectConnect $7500 HSA Eligible HDHP | HMO · Expanded Bronze | Direct | Accepting new patients |
| DirectConnect MyWeighForward $2000 | HMO · Gold | Direct | Accepting new patients |
| DirectConnect MyWeighForward $6000 | HMO · Silver | Direct | Accepting new patients |
| DirectConnect Standard $2000 | HMO · Gold | Direct | Accepting new patients |
| DirectConnect Standard $6000 | HMO · Silver | Direct | Accepting new patients |
| DirectConnect Standard $7500 HSA Eligible HDHP | HMO · Expanded Bronze | Direct | Accepting new patients |
Sanford Health Plan
Network data as of Jul 13, 2018, as reported by the insurer.
Show all 16 plans from Sanford Health Plan
| Plan | Plan type | Network tier | New patients |
|---|---|---|---|
| Sanford Individual Simplicity $1,750 | PPO · Gold | Simplicity | Accepting new patients |
| Sanford Individual Simplicity $3,500 | PPO · Silver | Simplicity | Accepting new patients |
| Sanford Individual Simplicity $4,750 | PPO · Silver | Simplicity | Accepting new patients |
| Sanford Individual Simplicity $6,500 | PPO · Expanded Bronze | Simplicity | Accepting new patients |
| Sanford Individual Simplicity $7,200 HSA Qualified | PPO · Expanded Bronze | Simplicity | Accepting new patients |
| Sanford Individual Simplicity Standardized $2,000 | PPO · Gold | Simplicity | Accepting new patients |
| Sanford Individual Simplicity Standardized $6,000 | PPO · Silver | Simplicity | Accepting new patients |
| Sanford Individual Simplicity Standardized $7,500 | PPO · Expanded Bronze | Simplicity | Accepting new patients |
| Sanford Individual TRUE $1,750 | HMO · Gold | Shptrue | Accepting new patients |
| Sanford Individual TRUE $3,500 | HMO · Silver | Shptrue | Accepting new patients |
| Sanford Individual TRUE $4,750 | HMO · Silver | Shptrue | Accepting new patients |
| Sanford Individual TRUE $6,500 | HMO · Expanded Bronze | Shptrue | Accepting new patients |
| Sanford Individual TRUE $7,200 HSA Qualified | HMO · Expanded Bronze | Shptrue | Accepting new patients |
| Sanford Individual TRUE Standardized $2,000 | HMO · Gold | Shptrue | Accepting new patients |
| Sanford Individual TRUE Standardized $6,000 | HMO · Silver | Shptrue | Accepting new patients |
| Sanford Individual TRUE Standardized $7,500 | HMO · Expanded Bronze | Shptrue | Accepting new patients |
Wellmark of South Dakota, Inc.
Network data as of Sep 8, 2026, as reported by the insurer.
Show all 7 plans from Wellmark of South Dakota, Inc.
| Plan | Plan type | Network tier | New patients |
|---|---|---|---|
| Wellmark Bronze HDHP EPO HSA Qualified (2 plan variants) | EPO · Expanded Bronze | Bluerx Essentials | Accepting new patients |
| Wellmark Bronze Traditional EPO (2 plan variants) | EPO · Expanded Bronze | Bluerx Essentials | Accepting new patients |
| Wellmark Gold Traditional EPO (2 plan variants) | EPO · Gold | Bluerx Essentials | Accepting new patients |
| Wellmark Silver Traditional EPO (2 plan variants) | EPO · Silver | Bluerx Essentials | Accepting new patients |
| Wellmark Standard Bronze EPO (2 plan variants) | EPO · Expanded Bronze | Bluerx Essentials | Accepting new patients |
| Wellmark Standard Gold EPO (2 plan variants) | EPO · Gold | Bluerx Essentials | Accepting new patients |
| Wellmark Standard Silver EPO (2 plan variants) | EPO · Silver | Bluerx Essentials | Accepting new patients |
This covers ACA Marketplace plans only, as reported by each insurer. It does not include employer, Medicare Advantage, or state-run exchange plans, and a plan missing from this list does not mean Dr. Gregory M. Gerrish is out of network. Insurer directories can be out of date, so always confirm with the insurer and the office before your visit.
Medicare Enrollment
Dr. Gregory M. Gerrish is enrolled to bill Medicare as a Practitioner - General Surgery .
Bills through: Prairie Lakes Health Care System Inc
Based on Medicare's public enrollment records as of Jul 17, 2026. This reflects Medicare fee-for-service enrollment only and says nothing about other insurance, quality, outcomes, or board certification.
Payments received
Drug payment
| W. L. Gore \u0026 Associates | $785 |
| Ethicon Us | $88 |
Other
| Travel and Lodging | $509 |
| Food and Beverage | $365 |
Studies
SANFORD SCHOOL OF MEDICINE OF UNIVERSITY OF SOUTH DAKOTA
Graduated in 2011Additional Specialities
- Resident
Affiliated hospitals
Looking for more Surgeons?
There are 6 other surgeons in this region.
- Gender: Male
- Address: 506 1st Avenue Southeast Watertown, 57201, SD
- Gender: Female
- Address: 901 4th Street Northwest Watertown, 57201, SD
- Gender: Male
- Address: 901 4th Street Northwest Watertown, 57201, SD
- Gender: Male
- Address: 401 9th Avenue Northwest Watertown, 57201, SD
- Gender: Male
- Address: 511 14th Avenue Northeast Watertown, 57201, SD
- Gender: Male
- Address: 901 4th Street Northwest Watertown, 57201, SD
Questions & Answers
Where can you meet with Dr. Gregory Mark Gerrish?
Dr. Gregory Mark Gerrish's office is located at 401 9th Avenue Northwest Prairie Lakes Hospital in Watertown, SD 57201.
Does Dr. Gregory Mark Gerrish accept patients with Sanford Health Plan?
Yes, Dr. Gregory Mark Gerrish is listed in-network for Sanford Health Plan through the ACA Marketplace (Obamacare/HealthCare.gov). See the Marketplace plans section for details.
Has Dr. Gregory Mark Gerrish affiliation with hospitals?
Dr. Gregory Mark Gerrish is affiliated with PRAIRIE LAKES HEALTHCARE SYSTEM, INC. For the full list of hospitals see this list.
What conditions does Dr. Gregory Mark Gerrish treat?
Dr. Gregory Mark Gerrish provides treatment for Anal Fissure, Diverticulosis, Enlarged Spleen, Gallstones, Lymphedema, Pancreatitis. For the full list see this list.