Total Payments
$15,519
2024 Payments
$4,328
Companies
49
Transactions
712
Medicare Patients
3,695
Medicare Billing
$372,563
Payment Breakdown by Category
Food & Beverage$15,355 (98.9%)
Education$110.07 (0.7%)
Consulting$53.91 (0.3%)
Payments by Nature
| Nature of Payment | Amount | Transactions | Share |
|---|---|---|---|
| Food and Beverage | $15,355 | 706 | 98.9% |
| Education | $110.07 | 3 | 0.7% |
| Consulting Fee | $53.91 | 3 | 0.3% |
Top Paying Companies
| Company | Total | Records | Latest Year |
|---|---|---|---|
| ABBVIE INC. | $5,866 | 242 | $0 (2024) |
| Janssen Biotech, Inc. | $1,289 | 51 | $0 (2024) |
| Salix Pharmaceuticals, a division of Bausch Health US, LLC | $1,130 | 57 | $0 (2024) |
| Takeda Pharmaceuticals U.S.A., Inc. | $1,112 | 88 | $0 (2024) |
| Regeneron Healthcare Solutions, Inc. | $612.04 | 13 | $0 (2024) |
| PFIZER INC. | $497.17 | 21 | $0 (2024) |
| GENZYME CORPORATION | $484.58 | 22 | $0 (2024) |
| Celgene Corporation | $472.93 | 37 | $0 (2024) |
| Allergan, Inc. | $400.18 | 27 | $0 (2020) |
| Phathom Pharmaceuticals, Inc. | $327.04 | 11 | $0 (2024) |
Payment History by Year
| Year | Amount | Transactions | Top Company |
|---|---|---|---|
| 2024 | $4,328 | 173 | ABBVIE INC. ($1,700) |
| 2023 | $3,306 | 156 | AbbVie Inc. ($1,268) |
| 2022 | $2,733 | 117 | ABBVIE INC. ($972.61) |
| 2021 | $124.99 | 1 | AbbVie Inc. ($124.99) |
| 2020 | $245.93 | 15 | Salix Pharmaceuticals, a division of Bausch Health US, LLC ($51.32) |
| 2019 | $1,522 | 74 | AbbVie, Inc. ($487.34) |
| 2018 | $1,858 | 100 | AbbVie, Inc. ($775.44) |
| 2017 | $1,402 | 76 | AbbVie, Inc. ($502.76) |
All Payment Transactions
712 individual payment records from CMS Open Payments — Page 1 of 29
| Date | Company | Product | Nature | Form | Amount | Type |
|---|---|---|---|---|---|---|
| 12/19/2024 | Janssen Biotech, Inc. | TREMFYA (Drug) | Food and Beverage | In-kind items and services | $23.69 | General |
| Category: Immunology | ||||||
| 12/17/2024 | ABBVIE INC. | SKYRIZI (Biological), RINVOQ | Food and Beverage | In-kind items and services | $21.35 | General |
| Category: IMMUNOLOGY | ||||||
| 12/13/2024 | Celltrion USA Inc. | ZYMFENTRA (Biological) | Food and Beverage | In-kind items and services | $11.88 | General |
| Category: GASTROENTEROLOGY | ||||||
| 12/12/2024 | Janssen Biotech, Inc. | TREMFYA (Drug), SIMPONI, SIMPONI ARIA | Food and Beverage | In-kind items and services | $28.68 | General |
| Category: Immunology | ||||||
| 12/12/2024 | ABBVIE INC. | RINVOQ (Biological), SKYRIZI | Food and Beverage | In-kind items and services | $24.87 | General |
| Category: IMMUNOLOGY | ||||||
| 12/11/2024 | Janssen Biotech, Inc. | TREMFYA (Drug) | Food and Beverage | In-kind items and services | $31.93 | General |
| Category: Immunology | ||||||
| 12/11/2024 | PFIZER INC. | XELJANZ (Drug), VELSIPITY | Food and Beverage | In-kind items and services | $25.62 | General |
| Category: GASTROINTESTINAL;INFLAMMATION;OPHTHALMOLOGY;TRANSPLANT | ||||||
| 12/10/2024 | Celltrion USA Inc. | ZYMFENTRA (Biological) | Food and Beverage | In-kind items and services | $150.00 | General |
| Category: GASTROENTEROLOGY | ||||||
| 12/10/2024 | ABBVIE INC. | RINVOQ (Biological), SKYRIZI | Food and Beverage | In-kind items and services | $25.14 | General |
| Category: IMMUNOLOGY | ||||||
| 12/09/2024 | Janssen Biotech, Inc. | TREMFYA (Drug) | Food and Beverage | In-kind items and services | $23.59 | General |
| Category: Immunology | ||||||
| 12/06/2024 | ABBVIE INC. | RINVOQ (Biological), SKYRIZI | Food and Beverage | In-kind items and services | $28.29 | General |
| Category: IMMUNOLOGY | ||||||
| 12/06/2024 | Regeneron Healthcare Solutions, Inc. | DUPIXENT (Biological) | Food and Beverage | In-kind items and services | $22.29 | General |
| Category: INFLAMMATION AND IMMUNOLOGY | ||||||
| 12/06/2024 | Phathom Pharmaceuticals, Inc. | VOQUEZNA (Drug) | Food and Beverage | In-kind items and services | $21.50 | General |
| Category: GASTROENTEROLOGY | ||||||
| 12/05/2024 | Phathom Pharmaceuticals, Inc. | VOQUEZNA (Drug) | Food and Beverage | In-kind items and services | $24.62 | General |
| Category: GASTROENTEROLOGY | ||||||
| 12/05/2024 | ABBVIE INC. | RINVOQ (Biological), SKYRIZI | Food and Beverage | In-kind items and services | $19.72 | General |
| Category: IMMUNOLOGY | ||||||
| 11/22/2024 | PFIZER INC. | XELJANZ (Drug), VELSIPITY | Food and Beverage | In-kind items and services | $26.35 | General |
| Category: GASTROINTESTINAL;INFLAMMATION;OPHTHALMOLOGY;TRANSPLANT | ||||||
| 11/21/2024 | Regeneron Healthcare Solutions, Inc. | DUPIXENT (Biological) | Food and Beverage | In-kind items and services | $28.00 | General |
| Category: INFLAMMATION AND IMMUNOLOGY | ||||||
| 11/20/2024 | ABBVIE INC. | SKYRIZI (Biological) | Food and Beverage | In-kind items and services | $33.13 | General |
| Category: IMMUNOLOGY | ||||||
| 11/19/2024 | Janssen Biotech, Inc. | TREMFYA (Drug) | Food and Beverage | In-kind items and services | $23.57 | General |
| Category: Immunology | ||||||
| 11/15/2024 | GENZYME CORPORATION | DUPIXENT (Biological) | Food and Beverage | In-kind items and services | $22.56 | General |
| Category: Immunology | ||||||
| 11/15/2024 | ABBVIE INC. | SKYRIZI (Biological), RINVOQ | Food and Beverage | In-kind items and services | $18.02 | General |
| Category: IMMUNOLOGY | ||||||
| 11/13/2024 | ABBVIE INC. | RINVOQ (Biological), SKYRIZI | Food and Beverage | In-kind items and services | $26.90 | General |
| Category: IMMUNOLOGY | ||||||
| 11/12/2024 | Janssen Biotech, Inc. | TREMFYA (Drug) | Food and Beverage | In-kind items and services | $22.39 | General |
| Category: Immunology | ||||||
| 11/08/2024 | ABBVIE INC. | SKYRIZI (Biological) | Food and Beverage | In-kind items and services | $11.65 | General |
| Category: IMMUNOLOGY | ||||||
| 11/07/2024 | ABBVIE INC. | SKYRIZI (Biological) | Food and Beverage | In-kind items and services | $119.25 | General |
| Category: IMMUNOLOGY | ||||||
Medicare Billing by Year
| Year | Procedures | Beneficiaries | Services | Submitted | Medicare Paid |
|---|---|---|---|---|---|
| 2023 | 13 | 1,021 | 1,109 | $949,258 | $103,076 |
| 2022 | 13 | 953 | 1,025 | $872,127 | $102,908 |
| 2021 | 12 | 838 | 895 | $437,674 | $88,816 |
| 2020 | 17 | 883 | 944 | $414,813 | $77,763 |
Total Patients
3,695
Total Services
3,973
Medicare Billing
$372,563
Procedure Codes
55
All Medicare Procedures & Services
55 procedure records from CMS Medicare Utilization — Page 1 of 3
| HCPCS | Description | Setting | Year | Patients | Services | Charges | Medicare Paid | Ratio |
|---|---|---|---|---|---|---|---|---|
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | Office | 2023 | 188 | 262 | $90,390 | $26,344 | 29.1% |
| 45385 | Removal of polyps or growths of large bowel using an endoscope with mechanical snare | Facility | 2023 | 114 | 114 | $147,858 | $23,768 | 16.1% |
| 45380 | Biopsy of large bowel using a flexible endoscope | Facility | 2023 | 187 | 187 | $235,620 | $13,540 | 5.7% |
| 99204 | New patient office or other outpatient visit, 45-59 minutes | Office | 2023 | 76 | 76 | $33,972 | $9,615 | 28.3% |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | Office | 2023 | 90 | 94 | $23,030 | $6,882 | 29.9% |
| 43251 | Removal of polyps or growths of esophagus, stomach, and/or upper small bowel using an endoscope with mechanical snare | Facility | 2023 | 39 | 39 | $56,940 | $5,297 | 9.3% |
| 43239 | Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | Facility | 2023 | 127 | 133 | $148,029 | $5,220 | 3.5% |
| 43249 | Balloon dilation of esophagus, stomach, and/or upper small bowel using a flexible endoscope, less than 3.0 cm | Facility | 2023 | 50 | 51 | $169,677 | $3,856 | 2.3% |
| 99203 | New patient office or other outpatient visit, 30-44 minutes | Office | 2023 | 35 | 35 | $10,570 | $3,098 | 29.3% |
| G0105 | Colorectal cancer screening; colonoscopy on individual at high risk | Facility | 2023 | 11 | 11 | $10,670 | $2,013 | 18.9% |
| 99215 | Established patient office or other outpatient visit, 40-54 minutes | Office | 2023 | 11 | 13 | $6,305 | $1,713 | 27.2% |
| 99202 | New patient office or other outpatient visit, 15-29 minutes | Office | 2023 | 25 | 25 | $4,950 | $1,455 | 29.4% |
| 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 | Facility | 2023 | 68 | 69 | $11,247 | $276.07 | 2.5% |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | Office | 2022 | 186 | 240 | $82,800 | $26,203 | 31.6% |
| 45385 | Removal of polyps or growths of large bowel using an endoscope with mechanical snare | Facility | 2022 | 118 | 119 | $154,343 | $24,467 | 15.9% |
| 45380 | Biopsy of large bowel using a flexible endoscope | Facility | 2022 | 186 | 187 | $235,620 | $13,321 | 5.7% |
| 99204 | New patient office or other outpatient visit, 45-59 minutes | Office | 2022 | 70 | 70 | $31,290 | $9,658 | 30.9% |
| 99215 | Established patient office or other outpatient visit, 40-54 minutes | Office | 2022 | 25 | 36 | $17,460 | $5,662 | 32.4% |
| 43239 | Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | Facility | 2022 | 113 | 115 | $127,995 | $5,076 | 4.0% |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | Office | 2022 | 68 | 70 | $17,150 | $4,981 | 29.0% |
| 43251 | Removal of polyps or growths of esophagus, stomach, and/or upper small bowel using an endoscope with mechanical snare | Facility | 2022 | 30 | 30 | $43,800 | $3,872 | 8.8% |
| 45390 | Removal of large bowel tissue using a flexible endoscope | Facility | 2022 | 11 | 11 | $9,581 | $3,131 | 32.7% |
| 43249 | Balloon dilation of esophagus, stomach, and/or upper small bowel using a flexible endoscope, less than 3.0 cm | Facility | 2022 | 39 | 39 | $129,753 | $2,865 | 2.2% |
| 99203 | New patient office or other outpatient visit, 30-44 minutes | Office | 2022 | 29 | 29 | $8,758 | $2,452 | 28.0% |
| 99202 | New patient office or other outpatient visit, 15-29 minutes | Office | 2022 | 20 | 20 | $3,960 | $998.80 | 25.2% |
About Dr. Elmer Chang, M.D
Dr. Elmer Chang, M.D is a Gastroenterology healthcare provider based in Mission Viejo, California. This provider has been registered with the National Plan and Provider Enumeration System (NPPES) since 10/28/2006. The National Provider Identifier (NPI) number assigned to this provider is 1912083353.
According to the Centers for Medicare & Medicaid Services (CMS) Open Payments database, Dr. Elmer Chang, M.D has received a total of $15,519 in payments from pharmaceutical and medical device companies, with $4,328 received in 2024. These payments were reported across 712 transactions from 49 companies. The most common payment nature is "Food and Beverage" ($15,355).
As a Medicare-enrolled provider, Chang has provided services to 3,695 Medicare beneficiaries, totaling 3,973 services with total Medicare billing of $372,563. Data is available for 4 years (2020–2023), covering 55 distinct procedure/service records.
Ad
Practice Information
- Specialty Gastroenterology
- Location Mission Viejo, CA
- Active Since 10/28/2006
- Last Updated 01/23/2013
- Taxonomy Code 207RG0100X
- Entity Type Individual
- NPI Number 1912083353
Products in Payments
- RINVOQ (Biological) $1,857
- SKYRIZI (Biological) $1,821
- Humira (Biological) $1,130
- XIFAXAN (Drug) $1,108
- DUPIXENT (Biological) $1,097
- ENTYVIO (Biological) $851.75
- STELARA (Biological) $751.99
- ZEPOSIA (Drug) $691.92
- TREMFYA (Drug) $585.42
- XELJANZ (Drug) $465.95
- LINZESS (Drug) $433.99
- VOQUEZNA (Drug) $327.04
- Creon (Drug) $254.16
- ZENPEP (Drug) $238.23
- Trulance (Drug) $233.49
- INJECTAFER (Drug) $198.68
- OCALIVA (Drug) $193.99
- CREON (Drug) $193.16
- ZYMFENTRA (Biological) $186.99
- Bravo (Device) $173.83
Explore
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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