Total Payments
$1,537
2021 Payments
$11.22
Companies
5
Transactions
27
Medicare Patients
13,415
Medicare Billing
$1.2M
Payment Breakdown by Category
Consulting$820.00 (53.4%)
Food & Beverage$559.22 (36.4%)
Education$157.50 (10.2%)
Payments by Nature
| Nature of Payment | Amount | Transactions | Share |
|---|---|---|---|
| Consulting Fee | $820.00 | 1 | 53.4% |
| Food and Beverage | $559.22 | 22 | 36.4% |
| Education | $157.50 | 4 | 10.2% |
Top Paying Companies
| Company | Total | Records | Latest Year |
|---|---|---|---|
| Aerie Pharmaceuticals, Inc. | $924.18 | 3 | $0 (2020) |
| Allergan, Inc. | $479.01 | 20 | $0 (2021) |
| Shire North American Group Inc | $80.32 | 2 | $0 (2018) |
| Alcon Laboratories Inc | $39.25 | 1 | $0 (2018) |
| Kala Pharmaceuticals, Inc. | $13.96 | 1 | $0 (2019) |
Payment History by Year
| Year | Amount | Transactions | Top Company |
|---|---|---|---|
| 2021 | $11.22 | 1 | Allergan, Inc. ($11.22) |
| 2020 | $981.27 | 12 | Aerie Pharmaceuticals, Inc. ($826.40) |
| 2019 | $56.31 | 3 | Allergan Inc. ($42.35) |
| 2018 | $291.57 | 5 | Allergan Inc. ($111.87) |
| 2017 | $196.35 | 6 | Allergan Inc. ($158.70) |
All Payment Transactions
27 individual payment records from CMS Open Payments — Page 1 of 2
| Date | Company | Product | Nature | Form | Amount | Type |
|---|---|---|---|---|---|---|
| 10/14/2021 | Allergan, Inc. | RESTASIS MULTIDOSE (Drug) | Food and Beverage | In-kind items and services | $11.22 | General |
| Category: DRY EYE | ||||||
| 12/23/2020 | Allergan, Inc. | COMBIGAN (Drug) | Food and Beverage | In-kind items and services | $3.82 | General |
| Category: OPHTHALMOLOGY | ||||||
| 11/17/2020 | Allergan, Inc. | COMBIGAN (Drug) | Food and Beverage | In-kind items and services | $1.98 | General |
| Category: OPHTHALMOLOGY | ||||||
| 10/23/2020 | Allergan, Inc. | RESTASIS (Drug) | Food and Beverage | In-kind items and services | $9.89 | General |
| Category: DRY EYE | ||||||
| 10/16/2020 | Allergan, Inc. | COMBIGAN (Drug) | Food and Beverage | In-kind items and services | $5.29 | General |
| Category: OPHTHALMOLOGY | ||||||
| 09/15/2020 | Allergan, Inc. | COMBIGAN (Drug) | Food and Beverage | In-kind items and services | $2.70 | General |
| Category: OPHTHALMOLOGY | ||||||
| 08/18/2020 | Allergan, Inc. | COMBIGAN (Drug) | Food and Beverage | In-kind items and services | $2.51 | General |
| Category: OPHTHALMOLOGY | ||||||
| 07/31/2020 | Allergan, Inc. | DURYSTA (Drug) | Education | In-kind items and services | $39.95 | General |
| Category: GLAUCOMA | ||||||
| 07/31/2020 | Allergan, Inc. | DURYSTA (Drug) | Education | In-kind items and services | $39.95 | General |
| Category: GLAUCOMA | ||||||
| 07/31/2020 | Allergan, Inc. | DURYSTA (Drug) | Education | In-kind items and services | $39.95 | General |
| Category: GLAUCOMA | ||||||
| 07/28/2020 | Aerie Pharmaceuticals, Inc. | rhopressa (Drug), rocklatan | Consulting Fee | Cash or cash equivalent | $820.00 | General |
| Category: Glaucoma | ||||||
| 03/10/2020 | Aerie Pharmaceuticals, Inc. | rhopressa (Drug), rocklatan | Food and Beverage | In-kind items and services | $6.40 | General |
| Category: Glaucoma | ||||||
| 02/28/2020 | Allergan, Inc. | LUMIGAN (Drug) | Food and Beverage | In-kind items and services | $8.83 | General |
| Category: OPHTHALMOLOGY | ||||||
| 11/26/2019 | Kala Pharmaceuticals, Inc. | INVELTYS (Drug) | Food and Beverage | In-kind items and services | $13.96 | General |
| Category: OCULAR | ||||||
| 11/15/2019 | Allergan Inc. | LUMIGAN (Drug) | Food and Beverage | In-kind items and services | $23.55 | General |
| Category: OPHTHALMOLOGY | ||||||
| 05/15/2019 | Allergan Inc. | LUMIGAN (Drug) | Food and Beverage | In-kind items and services | $18.80 | General |
| Category: OPHTHALMOLOGY | ||||||
| 10/16/2018 | Aerie Pharmaceuticals, Inc. | Rhopressa (Drug) | Food and Beverage | In-kind items and services | $97.78 | General |
| Category: Ophthalmology | ||||||
| 06/01/2018 | Shire North American Group Inc | XIIDRA (Drug) | Food and Beverage | In-kind items and services | $42.67 | General |
| Category: OPTHALMICS | ||||||
| 05/09/2018 | Allergan Inc. | LUMIGAN (Drug), COMBIGAN | Food and Beverage | In-kind items and services | $107.52 | General |
| Category: OPHTHALMOLOGY | ||||||
| 04/27/2018 | Allergan Inc. | ALPHAGAN P (Drug) | Food and Beverage | In-kind items and services | $4.35 | General |
| Category: OPHTHALMOLOGY | ||||||
| 04/20/2018 | Alcon Laboratories Inc | CyPass (Device) | Food and Beverage | In-kind items and services | $39.25 | General |
| Category: Ophthalmology | ||||||
| 06/16/2017 | Allergan Inc. | RESTASIS (Drug) | Food and Beverage | In-kind items and services | $12.03 | General |
| Category: DRY EYE | ||||||
| 06/06/2017 | Allergan Inc. | RESTASIS (Drug) | Food and Beverage | In-kind items and services | $4.15 | General |
| Category: DRY EYE | ||||||
| 05/24/2017 | Allergan Inc. | RESTASIS (Drug) | Food and Beverage | In-kind items and services | $123.67 | General |
| Category: DRY EYE | ||||||
| 05/22/2017 | Allergan Inc. | RESTASIS (Drug) | Food and Beverage | In-kind items and services | $10.11 | General |
| Category: DRY EYE | ||||||
Medicare Billing by Year
| Year | Procedures | Beneficiaries | Services | Submitted | Medicare Paid |
|---|---|---|---|---|---|
| 2023 | 12 | 2,482 | 2,701 | $965,799 | $185,197 |
| 2022 | 14 | 3,815 | 4,308 | $1.7M | $351,174 |
| 2021 | 16 | 3,704 | 4,301 | $1.3M | $342,979 |
| 2020 | 14 | 3,414 | 3,917 | $776,180 | $282,387 |
Total Patients
13,415
Total Services
15,227
Medicare Billing
$1.2M
Procedure Codes
56
All Medicare Procedures & Services
56 procedure records from CMS Medicare Utilization — Page 1 of 3
| HCPCS | Description | Setting | Year | Patients | Services | Charges | Medicare Paid | Ratio |
|---|---|---|---|---|---|---|---|---|
| 92014 | Established patient complete exam of visual system | Office | 2023 | 994 | 1,037 | $433,739 | $86,688 | 20.0% |
| 92012 | Established patient problem focused exam of visual system | Office | 2023 | 444 | 576 | $164,336 | $37,054 | 22.5% |
| 92083 | Exam of visual field with extended testing | Office | 2023 | 408 | 425 | $121,350 | $19,535 | 16.1% |
| 92004 | New patient complete exam of visual system | Office | 2023 | 127 | 127 | $72,759 | $14,303 | 19.7% |
| 92133 | Imaging of optic nerve | Office | 2023 | 397 | 413 | $68,098 | $10,762 | 15.8% |
| 66984 | Removal of cataract with insertion of prosthetic lens | Facility | 2023 | 12 | 12 | $35,724 | $5,696 | 15.9% |
| 66821 | Removal of recurring cataract in lens capsule using a laser | Facility | 2023 | 12 | 13 | $14,300 | $3,597 | 25.2% |
| 65855 | Laser repair to improve eye fluid flow | Facility | 2023 | 12 | 18 | $27,522 | $3,179 | 11.6% |
| 99204 | New patient office or other outpatient visit, 45-59 minutes | Office | 2023 | 15 | 15 | $11,640 | $2,171 | 18.7% |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | Office | 2023 | 16 | 17 | $4,937 | $1,038 | 21.0% |
| 92136 | Measurement of corneal curvature and depth of eye | Office | 2023 | 28 | 30 | $8,517 | $921.35 | 10.8% |
| 67820 | Removal of eyelashes using forceps | Office | 2023 | 17 | 18 | $2,877 | $253.19 | 8.8% |
| 92014 | Established patient complete exam of visual system | Office | 2022 | 1,406 | 1,584 | $633,600 | $150,444 | 23.7% |
| 92012 | Established patient problem focused exam of visual system | Office | 2022 | 602 | 841 | $231,275 | $57,368 | 24.8% |
| 92083 | Exam of visual field with extended testing | Office | 2022 | 662 | 691 | $200,390 | $31,964 | 16.0% |
| 66984 | Removal of cataract with insertion of prosthetic lens | Facility | 2022 | 62 | 66 | $196,482 | $30,737 | 15.6% |
| 92004 | New patient complete exam of visual system | Office | 2022 | 221 | 221 | $99,450 | $25,337 | 25.5% |
| 66982 | Complex removal of cataract with insertion of prosthetic lens | Facility | 2022 | 34 | 35 | $117,075 | $23,020 | 19.7% |
| 92133 | Imaging of optic nerve | Office | 2022 | 638 | 669 | $107,709 | $17,232 | 16.0% |
| 66821 | Removal of recurring cataract in lens capsule using a laser | Facility | 2022 | 31 | 34 | $37,400 | $9,540 | 25.5% |
| 92136 | Measurement of corneal curvature and depth of eye | Office | 2022 | 88 | 93 | $27,900 | $3,577 | 12.8% |
| 76519 | Ultrasound scan to determine eye length and lens power | Office | 2022 | 11 | 11 | $3,025 | $603.75 | 20.0% |
| 92286 | Imaging of front third of eye using a special microscope | Office | 2022 | 16 | 16 | $5,360 | $441.01 | 8.2% |
| 92250 | Photography of the retina | Office | 2022 | 16 | 16 | $3,440 | $403.40 | 11.7% |
| 92020 | Exam of the internal drainage system of eye | Office | 2022 | 12 | 14 | $1,190 | $293.98 | 24.7% |
About Dr. Michael Chang, M.D
Dr. Michael Chang, M.D is a Ophthalmology healthcare provider based in Lexington, Massachusetts. This provider has been registered with the National Plan and Provider Enumeration System (NPPES) since 09/22/2005. The National Provider Identifier (NPI) number assigned to this provider is 1366438624.
According to the Centers for Medicare & Medicaid Services (CMS) Open Payments database, Dr. Michael Chang, M.D has received a total of $1,537 in payments from pharmaceutical and medical device companies, with $11.22 received in 2021. These payments were reported across 27 transactions from 5 companies. The most common payment nature is "Consulting Fee" ($820.00).
As a Medicare-enrolled provider, Chang has provided services to 13,415 Medicare beneficiaries, totaling 15,227 services with total Medicare billing of $1.2M. Data is available for 4 years (2020–2023), covering 56 distinct procedure/service records.
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Practice Information
- Specialty Ophthalmology
- Location Lexington, MA
- Active Since 09/22/2005
- Last Updated 08/14/2023
- Taxonomy Code 207W00000X
- Entity Type Individual
- NPI Number 1366438624
Products in Payments
- rhopressa (Drug) $826.40
- RESTASIS (Drug) $168.59
- LUMIGAN (Drug) $158.70
- DURYSTA (Drug) $119.85
- Rhopressa (Drug) $97.78
- XIIDRA (Drug) $80.32
- CyPass (Device) $39.25
- COMBIGAN (Drug) $16.30
- INVELTYS (Drug) $13.96
- RESTASIS MULTIDOSE (Drug) $11.22
- ALPHAGAN P (Drug) $4.35
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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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