Doctor profile · Federal record
Dr. Michael Zerega, MD
Gastroenterology Physician (CMS: Gastroenterology) · Lake St Louis, MO
- NPI 1073505178
- Accepts Medicare
- 29 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
200 Brevco Plz, Suite 208
Lake St Louis, MO 633672949
(636) 561-9020
fax (636) 561-6208
Credentials & registration
- NPI registered
- August 2005 — 21 yrs on file
- Profile last updated
- April 2, 2015
- Year of graduation
- 1997 — 29 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
- State license (1)
- Missouri #2000154596
- Medicaid
- MO #1073505178
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1073505178. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
490
Distinct HCPCS
10
Medicare allowed
$70,954
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
45385 |
Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 119 | 119 | $248 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 69 | 55 | $88 | |
43239 |
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 65 | 62 | $71 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 63 | 54 | $125 | |
45385 |
Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 24 | 24 | $249 | |
45380 |
Biopsy of large bowel using a flexible endoscope | 21 | 21 | $123 | |
G0105 |
Colorectal cancer screening; colonoscopy on individual at high risk | 21 | 21 | $181 | |
99231 |
Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes | 19 | 17 | $49 | |
43248 |
Insertion of guide wire with dilation of esophagus using a flexible endoscope | 18 | 16 | $140 | |
99203 |
New patient office or other outpatient visit, 30-44 minutes | 18 | 18 | $107 |
In context: peer comparison
Among 3 peers in Lake St Louis Gastroenterology Physician, average services per provider: 51. This provider delivers 9.6× the peer median.Open Payments
Industry payments received
All-time total
$48
Transactions
2
Manufacturers
2
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Medtronic, INC. | 1 | $28.95 | |
| Pfizer INC. | 1 | $19.44 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
988
Patients
547
Total drug cost
$533,406
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Gavilyte-C (Peg3350/Sod Sulf,Bicarb,Cl/Kcl) | Brand | 273 | 270 | $4,510 |
| Pantoprazole Sodium | Generic | 164 | 53 | $3,010 |
| Omeprazole | Generic | 119 | 49 | $1,937 |
| Peg 3350-Electrolyte (Sodium Chloride/Nahco3/Kcl/Peg) | Brand | 92 | 92 | $1,622 |
| Famotidine | Generic | 71 | 27 | $1,295 |
| Gavilyte-G (Peg3350/Sod Sulf,Bicarb,Cl/Kcl) | Brand | 43 | 43 | $627 |
| Mesalamine | Generic | 34 | 0 | $23,397 |
| Linzess (Linaclotide) | Brand | 32 | 0 | $25,469 |
| Dicyclomine Hcl | Generic | 31 | 13 | $1,144 |
| Mesalamine ER (Mesalamine) | Brand | 29 | 0 | $4,515 |
Hospital affiliations
Frequently asked questions
What is Dr. Michael Zerega's medical specialty?
Dr. Michael Zerega practices Gastroenterology Physician in Lake St Louis, MO.
Where does Dr. Michael Zerega practice?
Dr. Michael Zerega practices at 200 Brevco Plz, Lake St Louis, MO 633672949. Office phone: 6365619020.
What is Dr. Michael Zerega's NPI?
Dr. Michael Zerega's National Provider Identifier (NPI) is 1073505178, issued by NPPES.
Does Dr. Michael Zerega accept Medicare assignment?
Yes. Dr. Michael Zerega accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Michael Zerega commonly perform?
Top Medicare-reported procedures in 2023: Removal of polyps or growths of large bowel using an endoscope with mechanical snare (HCPCS 45385); Established patient office or other outpatient visit (HCPCS 99213); Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (HCPCS 43239). Source: CMS Medicare Physician & Other Practitioners file.