Total Payments
$14,797
2024 Payments
$3,365
Companies
57
Transactions
823
Medicare Patients
4,391
Medicare Billing
$484,759
Payment Breakdown by Category
Food & Beverage$14,715 (99.4%)
Education$69.52 (0.5%)
Consulting$12.53 (0.1%)
Other$0.00 (0.0%)
Payments by Nature
| Nature of Payment | Amount | Transactions | Share |
|---|---|---|---|
| Food and Beverage | $14,715 | 819 | 99.4% |
| Education | $69.52 | 3 | 0.5% |
| Consulting Fee | $12.53 | 1 | 0.1% |
Top Paying Companies
| Company | Total | Records | Latest Year |
|---|---|---|---|
| ABBVIE INC. | $3,064 | 179 | $0 (2024) |
| Salix Pharmaceuticals, a division of Bausch Health US, LLC | $1,449 | 108 | $0 (2024) |
| Takeda Pharmaceuticals U.S.A., Inc. | $1,020 | 70 | $0 (2024) |
| Janssen Biotech, Inc. | $1,013 | 67 | $0 (2024) |
| Gilead Sciences, Inc. | $728.04 | 40 | $0 (2024) |
| E.R. Squibb & Sons, L.L.C. | $719.76 | 7 | $0 (2023) |
| Celgene Corporation | $561.68 | 32 | $0 (2024) |
| IRONWOOD PHARMACEUTICALS, INC | $461.88 | 30 | $0 (2024) |
| PFIZER INC. | $450.65 | 30 | $0 (2024) |
| Ferring Pharmaceuticals Inc. | $406.02 | 23 | $0 (2023) |
Payment History by Year
| Year | Amount | Transactions | Top Company |
|---|---|---|---|
| 2024 | $3,365 | 139 | ABBVIE INC. ($503.99) |
| 2023 | $2,395 | 110 | AbbVie Inc. ($500.29) |
| 2022 | $1,912 | 99 | ABBVIE INC. ($691.00) |
| 2021 | $1,962 | 111 | AbbVie Inc. ($365.29) |
| 2020 | $994.26 | 68 | Salix Pharmaceuticals, a division of Bausch Health US, LLC ($291.34) |
| 2019 | $1,764 | 115 | Salix Pharmaceuticals, a division of Bausch Health US, LLC ($396.06) |
| 2018 | $1,298 | 99 | AbbVie, Inc. ($291.63) |
| 2017 | $1,108 | 82 | AbbVie, Inc. ($198.99) |
All Payment Transactions
823 individual payment records from CMS Open Payments — Page 1 of 33
| Date | Company | Product | Nature | Form | Amount | Type |
|---|---|---|---|---|---|---|
| 12/27/2024 | Medtronic, Inc. | INTERSTIM (Device) | Food and Beverage | In-kind items and services | $30.62 | General |
| Category: Sacral Nerve Stimulation | ||||||
| 12/23/2024 | Salix Pharmaceuticals, a division of Bausch Health US, LLC | XIFAXAN (Drug) | Food and Beverage | In-kind items and services | $6.15 | General |
| Category: Gastroenterology | ||||||
| 12/23/2024 | Salix Pharmaceuticals, a division of Bausch Health US, LLC | XIFAXAN (Drug) | Food and Beverage | In-kind items and services | $3.09 | General |
| Category: Gastroenterology | ||||||
| 12/23/2024 | Salix Pharmaceuticals, a division of Bausch Health US, LLC | XIFAXAN (Drug) | Food and Beverage | In-kind items and services | $0.48 | General |
| Category: Gastroenterology | ||||||
| 12/18/2024 | Boston Scientific Corporation | WaveWriter Alpha Prime 16 (Device) | Food and Beverage | In-kind items and services | $44.31 | General |
| Category: WaveWriter Alpha_NMD | ||||||
| 12/17/2024 | GENZYME CORPORATION | DUPIXENT (Biological) | Food and Beverage | In-kind items and services | $19.27 | General |
| Category: Immunology | ||||||
| 12/16/2024 | ABBVIE INC. | RINVOQ (Biological), SKYRIZI | Food and Beverage | In-kind items and services | $17.97 | General |
| Category: IMMUNOLOGY | ||||||
| 12/15/2024 | Lilly USA, LLC | OMVOH (Drug) | Food and Beverage | In-kind items and services | $14.37 | General |
| Category: Immunology | ||||||
| 12/15/2024 | Gilead Sciences, Inc. | — | Food and Beverage | In-kind items and services | $7.92 | General |
| 12/13/2024 | Merck Sharp & Dohme LLC | DIFICID (Drug), ZINPLAVA, ZERBAXA | Food and Beverage | In-kind items and services | $14.40 | General |
| Category: INFECTIOUS DISEASE | ||||||
| 12/10/2024 | Ipsen Biopharmaceuticals, Inc | IQIRVO (Drug) | Food and Beverage | In-kind items and services | $21.03 | General |
| Category: Rare Disease | ||||||
| 12/04/2024 | Gilead Sciences, Inc. | Livdelzi (Drug) | Food and Beverage | In-kind items and services | $123.48 | General |
| Category: INFLAM | ||||||
| 12/04/2024 | AIMMUNE THERAPEUTICS, INC. | ZENPEP (Drug) | Food and Beverage | In-kind items and services | $25.43 | General |
| Category: ENDOCRINE PANCREATIC INSUFFICIENCY | ||||||
| 12/04/2024 | ABBVIE INC. | SKYRIZI (Biological), RINVOQ | Food and Beverage | In-kind items and services | $18.61 | General |
| Category: IMMUNOLOGY | ||||||
| 11/27/2024 | Janssen Biotech, Inc. | TREMFYA (Drug) | Food and Beverage | In-kind items and services | $25.46 | General |
| Category: Immunology | ||||||
| 11/26/2024 | Takeda Pharmaceuticals U.S.A., Inc. | ENTYVIO (Biological) | Food and Beverage | In-kind items and services | $14.10 | General |
| Category: INTERNAL MEDICINE | ||||||
| 11/26/2024 | Lilly USA, LLC | OMVOH (Drug) | Food and Beverage | In-kind items and services | $14.04 | General |
| Category: Immunology | ||||||
| 11/22/2024 | ABBVIE INC. | RINVOQ (Biological), SKYRIZI | Food and Beverage | In-kind items and services | $22.20 | General |
| Category: IMMUNOLOGY | ||||||
| 11/21/2024 | Regeneron Healthcare Solutions, Inc. | DUPIXENT (Biological) | Food and Beverage | In-kind items and services | $22.96 | General |
| Category: INFLAMMATION AND IMMUNOLOGY | ||||||
| 11/21/2024 | Takeda Pharmaceuticals U.S.A., Inc. | ENTYVIO (Biological) | Food and Beverage | In-kind items and services | $17.83 | General |
| Category: INTERNAL MEDICINE | ||||||
| 11/20/2024 | Braintree Laboratories, Inc. | SUFLAVE (Drug) | Food and Beverage | In-kind items and services | $26.32 | General |
| Category: GI COLON PREP | ||||||
| 11/16/2024 | Ardelyx, Inc. | IBSRELA (Drug) | Food and Beverage | In-kind items and services | $21.93 | General |
| Category: GASTROENTEROLOGY | ||||||
| 11/14/2024 | Phathom Pharmaceuticals, Inc. | VOQUEZNA (Drug) | Food and Beverage | In-kind items and services | $11.70 | General |
| Category: GASTROENTEROLOGY | ||||||
| 11/13/2024 | ABBVIE INC. | MAVYRET (Drug) | Food and Beverage | In-kind items and services | $20.20 | General |
| Category: VIROLOGY | ||||||
| 11/12/2024 | ABBVIE INC. | RINVOQ (Biological), SKYRIZI | Food and Beverage | In-kind items and services | $15.87 | General |
| Category: IMMUNOLOGY | ||||||
Medicare Billing by Year
| Year | Procedures | Beneficiaries | Services | Submitted | Medicare Paid |
|---|---|---|---|---|---|
| 2023 | 13 | 1,121 | 1,211 | $487,751 | $121,129 |
| 2022 | 16 | 1,247 | 1,378 | $581,470 | $138,739 |
| 2021 | 14 | 1,097 | 1,226 | $489,028 | $131,755 |
| 2020 | 14 | 926 | 1,014 | $372,951 | $93,136 |
Total Patients
4,391
Total Services
4,829
Medicare Billing
$484,759
Procedure Codes
57
All Medicare Procedures & Services
57 procedure records from CMS Medicare Utilization — Page 1 of 3
| HCPCS | Description | Setting | Year | Patients | Services | Charges | Medicare Paid | Ratio |
|---|---|---|---|---|---|---|---|---|
| 45385 | Removal of polyps or growths of large bowel using an endoscope with mechanical snare | Facility | 2023 | 133 | 133 | $134,596 | $28,579 | 21.2% |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | Office | 2023 | 151 | 174 | $35,670 | $16,590 | 46.5% |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | Office | 2023 | 209 | 230 | $33,350 | $15,731 | 47.2% |
| 45380 | Biopsy of large bowel using a flexible endoscope | Facility | 2023 | 137 | 137 | $120,560 | $12,444 | 10.3% |
| 43239 | Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | Facility | 2023 | 113 | 118 | $54,280 | $10,497 | 19.3% |
| 99222 | Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | Facility | 2023 | 77 | 79 | $21,725 | $8,440 | 38.9% |
| G0105 | Colorectal cancer screening; colonoscopy on individual at high risk | Facility | 2023 | 33 | 33 | $24,750 | $6,143 | 24.8% |
| 99232 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | Facility | 2023 | 62 | 93 | $13,950 | $5,969 | 42.8% |
| 99203 | New patient office or other outpatient visit, 30-44 minutes | Office | 2023 | 75 | 75 | $13,500 | $5,772 | 42.8% |
| 99204 | New patient office or other outpatient visit, 45-59 minutes | Office | 2023 | 41 | 41 | $11,070 | $4,621 | 41.7% |
| 99231 | Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes | Facility | 2023 | 62 | 70 | $8,400 | $2,799 | 33.3% |
| G0121 | Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk | Facility | 2023 | 13 | 13 | $9,750 | $2,368 | 24.3% |
| 43235 | Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope | Facility | 2023 | 15 | 15 | $6,150 | $1,175 | 19.1% |
| 45385 | Removal of polyps or growths of large bowel using an endoscope with mechanical snare | Facility | 2022 | 150 | 154 | $155,848 | $32,387 | 20.8% |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | Office | 2022 | 229 | 266 | $61,300 | $26,004 | 42.4% |
| 45380 | Biopsy of large bowel using a flexible endoscope | Facility | 2022 | 132 | 134 | $117,920 | $11,122 | 9.4% |
| 99204 | New patient office or other outpatient visit, 45-59 minutes | Office | 2022 | 90 | 90 | $29,805 | $11,055 | 37.1% |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | Office | 2022 | 135 | 154 | $25,655 | $10,745 | 41.9% |
| 43239 | Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | Facility | 2022 | 132 | 135 | $62,100 | $10,738 | 17.3% |
| 99222 | Initial hospital inpatient care per day, typically 50 minutes | Facility | 2022 | 90 | 95 | $26,125 | $10,365 | 39.7% |
| 99232 | Follow-up hospital inpatient care per day, typically 25 minutes | Facility | 2022 | 105 | 162 | $24,300 | $9,515 | 39.2% |
| G0105 | Colorectal cancer screening; colonoscopy on individual at high risk | Facility | 2022 | 26 | 26 | $19,500 | $4,863 | 24.9% |
| 99203 | New patient office or other outpatient visit, 30-44 minutes | Office | 2022 | 31 | 31 | $6,535 | $2,568 | 39.3% |
| G0121 | Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk | Facility | 2022 | 12 | 12 | $9,000 | $2,349 | 26.1% |
| 99231 | Follow-up hospital inpatient care per day, typically 15 minutes | Facility | 2022 | 61 | 65 | $7,800 | $2,058 | 26.4% |
About Dr. Alan Chang, MD
Dr. Alan Chang, MD is a Specialist healthcare provider based in Doylestown, Pennsylvania. This provider has been registered with the National Plan and Provider Enumeration System (NPPES) since 09/12/2005. The National Provider Identifier (NPI) number assigned to this provider is 1912992330.
According to the Centers for Medicare & Medicaid Services (CMS) Open Payments database, Dr. Alan Chang, MD has received a total of $14,797 in payments from pharmaceutical and medical device companies, with $3,365 received in 2024. These payments were reported across 823 transactions from 57 companies. The most common payment nature is "Food and Beverage" ($14,715).
As a Medicare-enrolled provider, Chang has provided services to 4,391 Medicare beneficiaries, totaling 4,829 services with total Medicare billing of $484,759. Data is available for 4 years (2020–2023), covering 57 distinct procedure/service records.
Ad
Practice Information
- Specialty Specialist
- Other Specialties Gastroenterology
- Location Doylestown, PA
- Active Since 09/12/2005
- Last Updated 02/28/2020
- Taxonomy Code 174400000X
- Entity Type Individual
- NPI Number 1912992330
Products in Payments
- ZEPOSIA (Drug) $1,247
- XIFAXAN (Drug) $1,170
- RINVOQ (Biological) $758.21
- STELARA (Biological) $698.58
- Humira (Biological) $511.43
- DUPIXENT (Biological) $496.20
- SKYRIZI (Biological) $470.87
- XELJANZ (Drug) $436.66
- HUMIRA (Biological) $428.74
- Linzess (Drug) $428.16
- ENTYVIO (Biological) $400.25
- LINZESS (Drug) $351.22
- Mulpleta (Drug) $344.98
- VOQUEZNA (Drug) $306.15
- OCALIVA (Drug) $297.84
- IBSRELA (Drug) $295.38
- INJECTAFER (Drug) $223.45
- DIFICID (Drug) $219.60
- Amitiza (Drug) $198.26
- MAVYRET (Drug) $192.15
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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