Total Payments
$209,600
2024 Payments
$18,610
Companies
45
Transactions
1,303
Medicare Patients
6,972
Medicare Billing
$1.2M
Payment Breakdown by Category
Other$163,540 (78.0%)
Food & Beverage$33,403 (15.9%)
Consulting$7,216 (3.4%)
Travel$5,311 (2.5%)
Gifts$79.69 (0.0%)
Education$50.99 (0.0%)
Payments by Nature
| Nature of Payment | Amount | Transactions | Share |
|---|---|---|---|
| Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program | $154,540 | 76 | 73.7% |
| Food and Beverage | $33,403 | 1,180 | 15.9% |
| Compensation for serving as faculty or as a speaker for a non-accredited and noncertified continuing education program | $9,000 | 4 | 4.3% |
| Consulting Fee | $7,216 | 4 | 3.4% |
| Travel and Lodging | $5,311 | 35 | 2.5% |
| Gift | $79.69 | 1 | 0.0% |
| Education | $50.99 | 3 | 0.0% |
Top Paying Companies
| Company | Total | Records | Latest Year |
|---|---|---|---|
| Gilead Sciences, Inc. | $85,632 | 251 | $0 (2024) |
| ABBVIE INC. | $81,845 | 288 | $0 (2024) |
| Allergan, Inc. | $15,277 | 123 | $0 (2020) |
| Salix Pharmaceuticals, a division of Bausch Health US, LLC | $13,356 | 187 | $0 (2024) |
| NESTLE HEALTHCARE NUTRITION INC. | $1,959 | 99 | $0 (2023) |
| Lilly USA, LLC | $1,449 | 20 | $0 (2024) |
| CSL Behring | $1,177 | 10 | $0 (2023) |
| Amgen Inc. | $979.81 | 8 | $0 (2024) |
| Takeda Pharmaceuticals U.S.A., Inc. | $795.56 | 103 | $0 (2021) |
| INTERCEPT PHARMACEUTICALS, INC. | $536.62 | 13 | $0 (2023) |
Payment History by Year
| Year | Amount | Transactions | Top Company |
|---|---|---|---|
| 2024 | $18,610 | 127 | Gilead Sciences, Inc. ($9,799) |
| 2023 | $15,804 | 144 | Gilead Sciences, Inc. ($10,031) |
| 2022 | $15,730 | 143 | Gilead Sciences, Inc. ($8,245) |
| 2021 | $20,544 | 179 | AbbVie Inc. ($11,283) |
| 2020 | $13,129 | 87 | AbbVie Inc. ($8,508) |
| 2019 | $47,192 | 236 | AbbVie, Inc. ($20,908) |
| 2018 | $34,439 | 225 | AbbVie, Inc. ($14,980) |
| 2017 | $44,154 | 162 | Gilead Sciences Inc ($23,486) |
All Payment Transactions
1,303 individual payment records from CMS Open Payments — Page 1 of 53
| Date | Company | Product | Nature | Form | Amount | Type |
|---|---|---|---|---|---|---|
| 12/20/2024 | Madrigal Pharmaceuticals | RESMETIROM (Drug) | Food and Beverage | In-kind items and services | $7.25 | General |
| Category: LIVER DISEASE | ||||||
| 12/19/2024 | QOL Medical, LLC | SUCRAID (Drug) | Food and Beverage | Cash or cash equivalent | $17.37 | General |
| Category: THERAPY FOR CSID | ||||||
| 12/19/2024 | AIMMUNE THERAPEUTICS, INC. | ZENPEP (Drug) | Food and Beverage | In-kind items and services | $15.64 | General |
| Category: ENDOCRINE PANCREATIC INSUFFICIENCY | ||||||
| 12/16/2024 | VIVUS LLC | QSYMIA (Drug) | Food and Beverage | In-kind items and services | $19.84 | General |
| Category: ENDOCRINOLOGY | ||||||
| 12/11/2024 | AIMMUNE THERAPEUTICS, INC. | ZENPEP (Drug) | Food and Beverage | In-kind items and services | $17.50 | General |
| Category: ENDOCRINE PANCREATIC INSUFFICIENCY | ||||||
| 12/09/2024 | IRONWOOD PHARMACEUTICALS, INC | Linzess (Drug) | Food and Beverage | Cash or cash equivalent | $23.19 | General |
| Category: GI | ||||||
| 12/07/2024 | Ardelyx, Inc. | IBSRELA (Drug) | Food and Beverage | In-kind items and services | $29.73 | General |
| Category: GASTROENTEROLOGY | ||||||
| 12/05/2024 | Gilead Sciences, Inc. | — | Food and Beverage | In-kind items and services | $26.18 | General |
| 12/05/2024 | Salix Pharmaceuticals, a division of Bausch Health US, LLC | XIFAXAN (Drug) | Food and Beverage | In-kind items and services | $20.36 | General |
| Category: Gastroenterology | ||||||
| 11/26/2024 | AIMMUNE THERAPEUTICS, INC. | ZENPEP (Drug) | Food and Beverage | In-kind items and services | $34.72 | General |
| Category: ENDOCRINE PANCREATIC INSUFFICIENCY | ||||||
| 11/25/2024 | ABBVIE INC. | CREON (Drug) | Food and Beverage | In-kind items and services | $5.93 | General |
| Category: ENDOCRINOLOGY | ||||||
| 11/22/2024 | AIMMUNE THERAPEUTICS, INC. | ZENPEP (Drug) | Food and Beverage | In-kind items and services | $14.37 | General |
| Category: ENDOCRINE PANCREATIC INSUFFICIENCY | ||||||
| 11/21/2024 | Braintree Laboratories, Inc. | SUFLAVE (Drug), SUTAB | Food and Beverage | In-kind items and services | $21.70 | General |
| Category: GI COLON PREP | ||||||
| 11/20/2024 | Salix Pharmaceuticals, a division of Bausch Health US, LLC | XIFAXAN (Drug) | Food and Beverage | In-kind items and services | $19.06 | General |
| Category: Gastroenterology | ||||||
| 11/15/2024 | ABBVIE INC. | LINZESS (Drug), CREON | Food and Beverage | In-kind items and services | $19.84 | General |
| Category: GASTROENTEROLOGY | ||||||
| 11/14/2024 | AIMMUNE THERAPEUTICS, INC. | ZENPEP (Drug) | Food and Beverage | In-kind items and services | $22.94 | General |
| Category: ENDOCRINE PANCREATIC INSUFFICIENCY | ||||||
| 11/14/2024 | QOL Medical, LLC | SUCRAID (Drug) | Food and Beverage | Cash or cash equivalent | $14.25 | General |
| Category: THERAPY FOR CSID | ||||||
| 11/13/2024 | RedHill Biopharma Inc. | Talicia (Drug) | Food and Beverage | Cash or cash equivalent | $143.97 | General |
| Category: Antibiotic | ||||||
| 11/12/2024 | Ardelyx, Inc. | IBSRELA (Drug) | Food and Beverage | In-kind items and services | $27.80 | General |
| Category: GASTROENTEROLOGY | ||||||
| 11/08/2024 | AIMMUNE THERAPEUTICS, INC. | ZENPEP (Drug) | Food and Beverage | In-kind items and services | $19.50 | General |
| Category: ENDOCRINE PANCREATIC INSUFFICIENCY | ||||||
| 11/08/2024 | Phathom Pharmaceuticals, Inc. | VOQUEZNA (Drug) | Food and Beverage | In-kind items and services | $10.18 | General |
| Category: GASTROENTEROLOGY | ||||||
| 11/07/2024 | Gilead Sciences, Inc. | — | Food and Beverage | In-kind items and services | $25.56 | General |
| 11/01/2024 | Madrigal Pharmaceuticals | RESMETIROM (Drug) | Food and Beverage | In-kind items and services | $15.45 | General |
| Category: LIVER DISEASE | ||||||
| 10/31/2024 | VIVUS LLC | QSYMIA (Drug) | Food and Beverage | In-kind items and services | $20.39 | General |
| Category: ENDOCRINOLOGY | ||||||
| 10/30/2024 | Salix Pharmaceuticals, a division of Bausch Health US, LLC | TRULANCE (Drug) | Food and Beverage | In-kind items and services | $16.42 | General |
| Category: Gastroenterology | ||||||
Medicare Billing by Year
| Year | Procedures | Beneficiaries | Services | Submitted | Medicare Paid |
|---|---|---|---|---|---|
| 2023 | 6 | 1,560 | 2,582 | $665,075 | $295,216 |
| 2022 | 10 | 1,943 | 3,055 | $826,625 | $340,858 |
| 2021 | 12 | 1,818 | 2,742 | $750,800 | $309,068 |
| 2020 | 10 | 1,651 | 2,581 | $705,175 | $227,422 |
Total Patients
6,972
Total Services
10,960
Medicare Billing
$1.2M
Procedure Codes
38
All Medicare Procedures & Services
38 procedure records from CMS Medicare Utilization — Page 1 of 2
| HCPCS | Description | Setting | Year | Patients | Services | Charges | Medicare Paid | Ratio |
|---|---|---|---|---|---|---|---|---|
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | Office | 2023 | 993 | 2,012 | $301,800 | $215,096 | 71.3% |
| 99204 | New patient office or other outpatient visit, 45-59 minutes | Office | 2023 | 267 | 267 | $73,425 | $36,966 | 50.3% |
| 43239 | Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | Facility | 2023 | 171 | 172 | $154,600 | $19,341 | 12.5% |
| 45385 | Removal of polyps or growths of large bowel using an endoscope with mechanical snare | Facility | 2023 | 50 | 51 | $56,300 | $10,751 | 19.1% |
| 45380 | Biopsy of large bowel using a flexible endoscope | Facility | 2023 | 59 | 59 | $59,000 | $9,842 | 16.7% |
| 45378 | Diagnostic exam of large bowel using a flexible endoscope | Facility | 2023 | 20 | 21 | $19,950 | $3,221 | 16.1% |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | Office | 2022 | 972 | 1,931 | $289,650 | $204,519 | 70.6% |
| 99204 | New patient office or other outpatient visit, 45-59 minutes | Office | 2022 | 284 | 284 | $78,100 | $39,963 | 51.2% |
| 76700 | Complete ultrasound scan of abdomen | Office | 2022 | 236 | 296 | $88,800 | $30,515 | 34.4% |
| 43239 | Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | Facility | 2022 | 199 | 200 | $179,800 | $22,369 | 12.4% |
| 45385 | Removal of polyps or growths of large bowel using an endoscope with mechanical snare | Facility | 2022 | 59 | 59 | $65,000 | $12,830 | 19.7% |
| 45380 | Biopsy of large bowel using a flexible endoscope | Facility | 2022 | 56 | 56 | $56,000 | $9,594 | 17.1% |
| 99223 | Initial hospital inpatient care per day, typically 70 minutes | Facility | 2022 | 49 | 51 | $17,850 | $8,558 | 47.9% |
| 99232 | Follow-up hospital inpatient care per day, typically 25 minutes | Facility | 2022 | 46 | 136 | $20,450 | $8,201 | 40.1% |
| 45378 | Diagnostic exam of large bowel using a flexible endoscope | Facility | 2022 | 25 | 25 | $23,750 | $3,855 | 16.2% |
| 91200 | Measurement of liver stiffness | Office | 2022 | 17 | 17 | $7,225 | $452.92 | 6.3% |
| 99214 | Established patient outpatient visit, total time 30-39 minutes | Office | 2021 | 889 | 1,620 | $243,000 | $174,670 | 71.9% |
| 99204 | New patient outpatient visit, total time 45-59 minutes | Office | 2021 | 208 | 208 | $57,200 | $29,432 | 51.5% |
| 76700 | Ultrasound of abdomen, complete | Office | 2021 | 187 | 249 | $74,700 | $25,225 | 33.8% |
| 43239 | Biopsy of the esophagus, stomach, and/or upper small bowel using an endoscope | Facility | 2021 | 169 | 170 | $152,800 | $19,109 | 12.5% |
| 99223 | Initial hospital inpatient care, typically 70 minutes per day | Facility | 2021 | 105 | 108 | $37,600 | $18,451 | 49.1% |
| 99232 | Subsequent hospital inpatient care, typically 25 minutes per day | Facility | 2021 | 96 | 222 | $33,850 | $13,646 | 40.3% |
| 45385 | Removal of polyps or growths in large bowel using an endoscope (colonoscopy) using a mechanical snare | Facility | 2021 | 42 | 42 | $46,200 | $9,250 | 20.0% |
| 45380 | Biopsy of the large bowel using an endoscope (colonoscopy) | Facility | 2021 | 41 | 41 | $41,000 | $6,986 | 17.0% |
| 45378 | Diagnostic examination of the colon (large bowel) using an endoscope(colonoscopy); high risk | Facility | 2021 | 31 | 31 | $29,450 | $4,904 | 16.7% |
About Dr. Christopher Bui, MD
Dr. Christopher Bui, MD is a Gastroenterology healthcare provider based in Santa Ana, California. This provider has been registered with the National Plan and Provider Enumeration System (NPPES) since 11/17/2006. The National Provider Identifier (NPI) number assigned to this provider is 1811061468.
According to the Centers for Medicare & Medicaid Services (CMS) Open Payments database, Dr. Christopher Bui, MD has received a total of $209,600 in payments from pharmaceutical and medical device companies, with $18,610 received in 2024. These payments were reported across 1,303 transactions from 45 companies. The most common payment nature is "Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program" ($154,540).
As a Medicare-enrolled provider, Bui has provided services to 6,972 Medicare beneficiaries, totaling 10,960 services with total Medicare billing of $1.2M. Data is available for 4 years (2020–2023), covering 38 distinct procedure/service records.
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Practice Information
- Specialty Gastroenterology
- Location Santa Ana, CA
- Active Since 11/17/2006
- Last Updated 04/03/2014
- Taxonomy Code 207RG0100X
- Entity Type Individual
- Practice Solo Practitioner
- NPI Number 1811061468
Products in Payments
- Vemlidy (Drug) $61,311
- CREON (Drug) $23,896
- Mavyret (Drug) $20,613
- TRULANCE (Drug) $11,110
- Creon (Drug) $8,932
- LINZESS (Drug) $8,852
- ZENPEP (Drug) $8,835
- Vosevi (Drug) $3,989
- Epclusa (Drug) $2,799
- Viekira (Drug) $2,193
- XIFAXAN (Drug) $1,988
- Hizentra (Biological) $1,044
- Amitiza (Drug) $865.78
- TALTZ (Drug) $851.65
- VIBERZI (Drug) $843.89
- STELARA (Biological) $648.78
- Lenvima (Drug) $503.34
- OCALIVA (Drug) $499.04
- IBSRELA (Drug) $458.42
- Repatha (Biological) $382.82
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Data Sources
Provider data from NPPES. Payment data from CMS Open Payments. Medicare data from CMS Medicare Provider Utilization. All data is public and updated periodically.
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