Doctor profile · Federal record
Dr. Eugene Yoon, M.D.
Gastroenterology Physician (CMS: Gastroenterology) · Fullerton, CA
- NPI 1861618449
- Accepts Medicare
- 25 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
1837 Sunny Crest Dr
Fullerton, CA 928353616
(714) 446-5831
fax (714) 446-7910
Credentials & registration
- NPI registered
- April 2007 — 19 yrs on file
- Profile last updated
- October 24, 2024
- Year of graduation
- 2001 — 25 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
- State license (1)
- California #A81190
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1861618449. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
936
Distinct HCPCS
10
Medicare allowed
$110,544
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
G0500 |
Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito | 177 | 176 | $6 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 103 | 82 | $137 | |
43239 |
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 92 | 89 | $109 | |
43235 |
Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 76 | 75 | $101 | |
45385 |
Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 75 | 75 | $254 | |
45380 |
Biopsy of large bowel using a flexible endoscope | 71 | 70 | $152 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 50 | 43 | $99 | |
G0121 |
Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk | 47 | 47 | $190 | |
45378 |
Diagnostic exam of large bowel using a flexible endoscope | 42 | 42 | $185 | |
99152 |
Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes | 38 | 38 | $13 |
In context: peer comparison
Among 3 peers in Fullerton Gastroenterology Physician, average services per provider: 60. This provider delivers 16× the peer median.Open Payments
Industry payments received
All-time total
$1,756
Transactions
73
Manufacturers
15
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Abbvie INC. | 27 | $433.06 | |
| Takeda Pharmaceuticals U.S.A., INC. | 8 | $260.26 | |
| Genzyme Corporation | 8 | $195.56 | |
| Enterra Medical, INC. | 1 | $165.76 | |
| Gilead Sciences, INC. | 4 | $98.14 | |
| Pfizer INC. | 4 | $95.90 | |
| Ardelyx, INC. | 5 | $86.82 | |
| Janssen Biotech, INC. | 3 | $61.21 | |
| Albireo Pharma, INC. | 3 | $49.58 | |
| Celgene Corporation | 2 | $41.82 | |
| Lilly USA, LLC | 2 | $36.50 | |
| Phathom Pharmaceuticals, INC. | 2 | $33.05 | |
| Salix Pharmaceuticals, A Division of Bausch Health US, LLC | 2 | $31.90 | |
| Qol Medical, LLC | 1 | $29.65 | |
| Regeneron Healthcare Solutions, INC. | 1 | $25.45 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
700
Patients
199
Total drug cost
$648,048
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Omeprazole | Generic | 212 | 87 | $3,206 |
| Pantoprazole Sodium | Generic | 83 | 28 | $1,382 |
| Mesalamine | Generic | 55 | 15 | $33,932 |
| Cholestyramine (Cholestyramine (With Sugar)) | Brand | 50 | 22 | $5,848 |
| Nortriptyline Hcl | Generic | 46 | 16 | $650 |
| Dicyclomine Hcl | Generic | 43 | 18 | $650 |
| Linzess (Linaclotide) | Brand | 34 | 0 | $27,502 |
| Colestipol Hcl | Generic | 30 | 13 | $4,020 |
| Creon (Lipase/Protease/Amylase) | Brand | 29 | 0 | $48,214 |
| Sucralfate | Generic | 24 | 0 | $2,670 |
Frequently asked questions
What is Dr. Eugene Yoon's medical specialty?
Dr. Eugene Yoon practices Gastroenterology Physician in Fullerton, CA.
Where does Dr. Eugene Yoon practice?
Dr. Eugene Yoon practices at 1837 Sunny Crest Dr, Fullerton, CA 928353616. Office phone: 7144465831.
What is Dr. Eugene Yoon's NPI?
Dr. Eugene Yoon's National Provider Identifier (NPI) is 1861618449, issued by NPPES.
Does Dr. Eugene Yoon accept Medicare assignment?
Yes. Dr. Eugene Yoon accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Eugene Yoon commonly perform?
Top Medicare-reported procedures in 2023: Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito (HCPCS G0500); Established patient office or other outpatient visit (HCPCS 99214); Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (HCPCS 43239). Source: CMS Medicare Physician & Other Practitioners file.