Doctor profile · Federal record
Dr. William Simpson, M.D.
Gastroenterology Physician (CMS: Gastroenterology) · Gastroenterology Physician · Gastroenterology Physician · Kalispell, MT
- NPI 1487655346
- Accepts Medicare
- 28 yrs in practice
- Licensed in 3 states
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
320 Sunnyview Ln
Kalispell, MT 599013129
(406) 752-7441
Credentials & registration
- NPI registered
- August 2005 — 21 yrs on file
- Profile last updated
- November 27, 2023
- Year of graduation
- 1998 — 28 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
- State licenses (3)
- Montana #79718 · Oklahoma #30937 · Texas #J5017
- Medicaid
- TX #105169003
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1487655346. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
1,211
Distinct HCPCS
10
Medicare allowed
$141,818
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
45385 |
Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 173 | 173 | $251 | |
43239 |
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 156 | 153 | $62 | |
43249 |
Balloon dilation of esophagus, stomach, and/or upper small bowel using a flexible endoscope, less than 3.0 cm | 149 | 135 | $126 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 118 | 84 | $62 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 96 | 58 | $92 | |
45380 |
Biopsy of large bowel using a flexible endoscope | 86 | 86 | $128 | |
43235 |
Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 58 | 58 | $101 | |
45378 |
Diagnostic exam of large bowel using a flexible endoscope | 50 | 50 | $163 | |
G0105 |
Colorectal cancer screening; colonoscopy on individual at high risk | 49 | 49 | $178 | |
99231 |
Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes | 43 | 33 | $50 |
In context: peer comparison
Among 2 peers in this city , average services per provider: 58. This provider delivers 21× the peer median.Open Payments
Industry payments received
All-time total
$68
Transactions
2
Manufacturers
2
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Takeda Pharmaceuticals U.S.A., Inc. | 1 | $44.25 | |
| Ipsen Biopharmaceuticals, Inc | 1 | $23.66 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
1,494
Patients
373
Total drug cost
$228,480
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Pantoprazole Sodium | Generic | 866 | 261 | $10,825 |
| Famotidine | Generic | 93 | 27 | $1,207 |
| Esomeprazole Magnesium | Generic | 88 | 17 | $5,724 |
| Omeprazole | Generic | 84 | 27 | $1,379 |
| Xifaxan (Rifaximin) | Brand | 57 | 0 | $201,769 |
| Carvedilol | Generic | 49 | 18 | $245 |
| Bethanechol Chloride | Generic | 44 | 11 | $2,662 |
| Spironolactone | Generic | 44 | 12 | $967 |
| Furosemide | Generic | 28 | 0 | $215 |
| Simvastatin | Generic | 28 | 0 | $116 |
Frequently asked questions
What is Dr. William Simpson's medical specialty?
Dr. William Simpson practices Gastroenterology Physician in Kalispell, MT.
Where does Dr. William Simpson practice?
Dr. William Simpson practices at 320 Sunnyview Ln, Kalispell, MT 599013129. Office phone: 4067527441.
What is Dr. William Simpson's NPI?
Dr. William Simpson's National Provider Identifier (NPI) is 1487655346, issued by NPPES.
Does Dr. William Simpson accept Medicare assignment?
Yes. Dr. William Simpson accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. William Simpson commonly perform?
Top Medicare-reported procedures in 2023: 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); Balloon dilation of esophagus, stomach, and/or upper small bowel using a flexible endoscope, less than 3.0 cm (HCPCS 43249). Source: CMS Medicare Physician & Other Practitioners file.