Medicare Enrolled
Dr. Peter Chang, M.D.
Ophthalmology · Waltham, MA
Practice pattern: Mixed Practice
— Diverse clinical practice across multiple procedure types
Speaking/Promotional
Very High
DATA COVERAGE
Data in 4 of 4 federal sources
Measures public federal data availability — not provider quality
Informational, not a quality rating.
This page presents federal public records about Dr. Chang from CMS (NPPES, Open Payments, Medicare Provider Utilization, PECOS). It is not medical advice, an endorsement, or a judgment of clinical quality. Always consult the provider directly and a licensed clinician for medical decisions. Read methodology →
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What this data tells you about Dr. Chang
Dr. Peter Chang is an ophthalmology specialist in Waltham, MA, with 16 years of NPI registration. Based on federal Medicare data, Dr. Chang performed 16,690 Medicare services across 3,217 unique beneficiaries.
Between the years covered by Open Payments, Dr. Chang received a total of $791,917 from 49 pharmaceutical and/or device companies across 948 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in ophthalmology. The majority of payments are for speaking programs and promotional activities, reflecting participation in industry-sponsored events. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Chang is Very High — reflecting how much public federal data is available about this provider. Patients are encouraged to use this data as one of several factors when choosing a healthcare provider.
✓ 16 years in practice
▲ Top 3% volume in MA
$791,917 industry payments
Medicare Practice Summary
Medicare Utilization ↗16,690
Medicare services
Top 3% in MA for ophthalmology
3,217
Unique beneficiaries
$79
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~1,043 Medicare services per year of practice
Top procedures by volume
Ranked by number of services performed for Medicare patients. Avg. submitted charge is what the provider billed; avg. Medicare payment is what CMS paid.
| Procedure | Volume | Avg. paid | Avg. submitted |
|---|---|---|---|
| Eye injection (Vabysmo/faricimab) An injection of faricimab-svoa, a medication administered in 0.1 mg doses. |
9,600 | $29 | $71 |
| Retinal imaging (OCT scan) This procedure involves imaging the retina to visualize its structure. It is used to examine the back of the eye. |
1,153 | $33 | $140 |
| Comprehensive eye exam, established patient A comprehensive examination of the visual system performed for a patient who has previously been seen by the provider. |
762 | $102 | $317 |
| Aflibercept eye injection (Eylea) | 740 | $693 | $1,500 |
| Eye injection for retinal disease A procedure involving the administration of medication directly into the eye. |
598 | $89 | $569 |
| Triamcinolone acetonide injection, 1 mg An injection of triamcinolone acetonide, a corticosteroid medication, administered in a 1 mg dose. |
541 | $38 | $91 |
| Eye exam, established patient, focused A limited examination of the visual system for an existing patient. The provider focuses on a specific eye-related concern or symptom. |
401 | $72 | $276 |
| Corneal topography and eye depth measurement This procedure measures the curvature and depth of the cornea, the clear front surface of the eye. |
221 | $20 | $184 |
| Removal of eye fluid | 217 | $119 | $391 |
| Comprehensive eye exam, new patient A comprehensive examination of the visual system performed for a new patient. |
195 | $122 | $379 |
| Office visit, established patient (30-39 min) A follow-up office visit for an existing patient lasting between 30 and 39 minutes. The visit involves medical evaluation and management of the patient's condition. |
175 | $100 | $300 |
| Additional hour of intravenous chemotherapy This code represents the administration of chemotherapy medication into a vein for each additional hour beyond the initial period. |
150 | $26 | $100 |
| Complete blood count (CBC) with differential An automated laboratory test that measures the levels of red blood cells, white blood cells, and platelets in the blood, including a breakdown of the different types of white blood cells. |
129 | $8 | $25 |
| Blood creatinine level test A blood test that measures the amount of creatinine, a waste product from muscle wear and tear, to help assess kidney function. |
128 | $5 | $15 |
| Liver enzyme (SGOT) level test A blood test that measures the level of the liver enzyme SGOT to help assess liver health. |
128 | $5 | $15 |
| Liver enzyme (SGPT) level test A blood test that measures the level of the liver enzyme SGPT to assess liver function. |
128 | $5 | $15 |
| Blood urea nitrogen test A blood test that measures the amount of urea nitrogen to assess kidney function. |
128 | $4 | $12 |
| Blood glucose level test A test that measures the amount of sugar in your blood. |
127 | $4 | $12 |
| Bevacizumab injection, 10 mg Administration of a 10 mg dose of bevacizumab medication via injection. |
125 | $56 | $98 |
| Glutamyltransferase (GGT) level test A blood test that measures the level of the liver enzyme glutamyltransferase (GGT) to help evaluate liver health. |
122 | $7 | $20 |
| Cataract surgery with lens implant Surgical removal of the clouded natural lens of the eye and replacement with an artificial prosthetic lens to restore vision. |
104 | $426 | $1,458 |
| Blood draw (venipuncture) Insertion of a needle into a vein to collect a blood sample. |
88 | $8 | $25 |
| Extended exam of back of eye with optic nerve drawing A detailed examination of the posterior section of the eye, including the optic nerve, with documentation through drawing. |
82 | $12 | $83 |
| Visual field test, extended A test that maps your complete field of vision to detect blind spots or peripheral vision loss. Extended testing provides a more detailed assessment than a standard visual field exam. |
69 | $50 | $150 |
| Retinal photography (fundus photo) This procedure involves taking photographs of the retina, the light-sensitive tissue at the back of the eye. It is used to document the condition of the eye's interior structures. |
62 | $34 | $151 |
| Intravenous chemotherapy infusion, 1 hour or less Administration of chemotherapy medication directly into a vein. The procedure takes one hour or less to complete. |
62 | $117 | $500 |
| Unclassified drug A medication that does not fit into standard HCPCS or CPT classification categories. |
55 | $2,062 | $4,500 |
| Laser removal of recurring cataract A laser procedure to remove a recurring cataract within the lens capsule. |
54 | $283 | $1,000 |
| Optic nerve imaging (OCT scan) Imaging of the optic nerve. |
52 | $28 | $130 |
| Retinal angiography with dye injection This procedure uses a special camera to examine the blood vessels in the retina after a dye has been injected into the body. |
49 | $123 | $500 |
| Methylprednisolone injection, up to 125 mg An injection of methylprednisolone sodium succinate, a corticosteroid medication, with a dosage of up to 125 mg. |
45 | $4 | $10 |
| Normal saline infusion, 500 ml Administration of sterile normal saline solution through an intravenous line. This procedure involves the infusion of a 500 ml unit of the solution. |
29 | $1 | $6 |
| Eyelash removal with forceps This procedure involves the manual removal of eyelashes using forceps. It is a mechanical extraction method performed on the eyelid area. |
23 | $14 | $116 |
| Vitreous removal between lens and retina This procedure involves the removal of the vitreous fluid located between the lens and the retina of the eye. |
22 | $685 | $2,738 |
| New patient office visit (45-59 min) An initial office visit for a new patient lasting between 45 and 59 minutes. This code covers the total time spent by the physician or qualified healthcare professional on the date of the encounter. |
19 | $126 | $360 |
| Insertion of drug delivery implant into tear duct A small implant containing medication is placed into the tear duct of the eye to deliver drugs directly to the eye over time. |
18 | $14 | $100 |
| Ultrasound of eye tissue and structures A diagnostic imaging test that uses sound waves to create pictures of the eye's internal tissues and structures. |
18 | $41 | $247 |
| Injection into suprachoroidal space of eye A procedure involving the injection of medication into the space located above the choroid membrane of the eye. |
17 | $178 | $694 |
| Office visit, established patient (20-29 min) An office visit for an existing patient lasting between 20 and 29 minutes. The visit involves medical evaluation and management of the patient's condition. |
17 | $77 | $200 |
| Office visit, established patient, complex (40-54 min) An office or outpatient visit for an existing patient lasting between 40 and 54 minutes. This level of service is determined by the total time spent on the date of the encounter. |
14 | $156 | $400 |
| New patient office visit, complex (60-74 min) | 12 | $161 | $500 |
| Extended eye exam with retinal drawing A detailed examination of the back of the eye that includes creating a drawing of the retina. |
11 | $18 | $82 |
How to read this data: This reflects Medicare patients only (typically 65+). Payment amounts are what Medicare paid the provider, not your out-of-pocket cost. A higher procedure volume generally indicates more experience with that procedure.
1.2% high complexity
78.4% medium
20.4% routine
Industry Payment Transparency
Open Payments through 2024 ↗$791,917
Total received (2018-2024)
Avg $113,131/year across 7 years
Top 1% in MA for ophthalmology
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
49
Companies
948
Individual payments
All payments are legal and publicly reported · Not evidence of wrongdoing · How to interpret →
Payment profile
Industry payments classified by relationship type. Not all payments are equal — research and consulting reflect different relationships than speaking programs or meals.
Speaking / Promotional
Speaker programs, honoraria, and industry-sponsored educational events
$745,171 (94.1%)
Consulting
Expert advisory fees, typically reflecting recognized clinical expertise
$34,571 (4.4%)
Meals & Travel
Food, beverages, travel, and lodging — typically low-value
$12,175 (1.5%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$204,144
2023
$165,244
2022
$227,110
2021
$149,139
2020
$29,399
2019
$16,039
2018
$842
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
Mallinckrodt Hospital Products Inc.
$150,173
Alimera Sciences, Inc.
$21,435
Alcon Vision LLC
$12,912
Astellas Pharma US Inc
$6,421
Regeneron Healthcare Solutions, Inc.
$3,820
Bausch & Lomb Americas Inc.
$3,703
Genentech USA, Inc.
$2,765
Dutch Ophthalmic, USA
$1,178
ABBVIE INC.
$461
Dompe US, Inc.
$315
Harrow Eye, LLC
$199
ANI Pharmaceuticals, Inc.
$143
Oyster Point Pharma, Inc.
$134
Tarsus Pharmaceuticals, Inc.
$116
EyePoint Pharmaceuticals US, Inc.
$114
Amgen Inc.
$83
SUN PHARMACEUTICAL INDUSTRIES INC.
$60
Ocular Therapeutix, Inc.
$60
Apellis Pharmaceuticals, Inc.
$20
BIOTISSUE HOLDINGS INC.
$16
Thea Pharma Inc.
$14
Top 3 companies account for 90.4% of 2024 payments
All-time payments by company (2018-2024) ›
Mallinckrodt Hospital Products Inc.
$500,096
EyePoint Pharmaceuticals US, Inc.
$134,035
Bausch & Lomb Americas Inc.
$60,363
Alimera Sciences, Inc.
$45,241
Alcon Vision LLC
$14,533
Boehringer Ingelheim Pharmaceuticals, Inc.
$8,176
AbbVie Inc.
$6,547
Astellas Pharma US Inc
$6,473
Regeneron Healthcare Solutions, Inc.
$4,314
Genentech USA, Inc.
$3,108
Dutch Ophthalmic, USA
$1,842
ABBVIE INC.
$647
Allergan Inc.
$600
Bausch & Lomb, a division of Bausch Health US, LLC
$529
Aerie Pharmaceuticals, Inc.
$452
Dompe US, Inc.
$404
Sun Pharmaceutical Industries Inc.
$366
Beaver-Visitec International, Inc.
$350
Sight Sciences, Inc.
$302
Mallinckrodt Enterprises LLC
$290
ANI Pharmaceuticals, Inc.
$271
Oyster Point Pharma, Inc.
$268
Kala Pharmaceuticals, Inc.
$268
Ocular Therapeutix, Inc.
$260
Oculus Surgical Inc.
$206
Novartis Pharmaceuticals Corporation
$199
Harrow Eye, LLC
$199
Allergan, Inc.
$171
Biogen, Inc.
$150
SUN PHARMACEUTICAL INDUSTRIES INC.
$125
Tarsus Pharmaceuticals, Inc.
$116
Horizon Therapeutics plc
$114
NEW WORLD MEDICAL,INC.
$112
Eyevance Pharmaceuticals LLC
$105
Glaukos Corporation
$100
Mallinckrodt LLC
$93
Johnson & Johnson Surgical Vision, Inc.
$87
Amgen Inc.
$83
Shire North American Group Inc
$72
Rayner Intraocular Lenses Limited
$46
Apellis Pharmaceuticals, Inc.
$40
Coherus Biosciences Inc.
$38
TissueTech, Inc.
$29
Vyera Pharmaceuticals, LLC
$22
Vanda Pharmaceuticals Inc.
$20
BIOTISSUE HOLDINGS INC.
$16
Thea Pharma Inc.
$14
Ivantis, Inc
$13
TISSUETECH, INC.
$12
Top 3 companies account for 87.7% of all-time payments
Associated products mentioned in payments ›
ACTHAR · ARGOS · Actemra · Acuvue · BEOVU · BROMSITE · BromSite · BromSite (bromfenac ophthalmic solution) 0.075% · CEQUA · COMBIGAN · Cequa · Cimerli · Clareon · Constellation · DAILIES · DEXTENZA · DEXYCU · DUREZOL · DURYSTA · Daraprim Tablet 25mg · EVA · EYLEA · EYLEA AFLIBERCEPT INJECTION · EYLEA HD · EYP-1901 · Flarex · HUMIRA · HYDRUS Microstent · Hetlioz · Hydrus · IHEEZO · ILUVIEN · INVELTYS · ISTENT TRABECULAR MICRO-BYPASS STENT SYSTEM · IYUZEH · Iluvien · Izervay · Kahook Dual Blade · LOTEMAX SM · LUMIGAN · Lucentis · MIEBO · OMNI · OMNI(R) SURGICAL SYSTEM (US) · OXERVATE · OZURDEX · Omidria · Oxervate · PROKERA · PROLENSA · PURIFIED CORTROPHIN GEL · Prokera · RESTASIS MULTIDOSE · RETISERT · Rhopressa · Susvimo · Syfovre · TAVNEOS · TEPEZZA · TRAVATAN Z · TYRVAYA · Tobradex ST · VABYSMO · VEVYE · VISUDYNE · VUITY · VYZULTA · Vabysmo · XDEMVY · XELPROS · XEN · XIIDRA · XIPERE · YUTIQ · Zerviate · combined machine · iStent inject Trabecular Micro-Bypass Stent System · rocklatan
Should you be concerned? Payments from pharmaceutical and device companies are legal and common — 57% of U.S. physicians receive at least one. They often reflect legitimate consulting, research, or education. What matters is whether a recommended drug or device appears in your doctor's payment records. If so, consider asking your doctor about it. How to interpret this data →
The majority of payments (94%) are for speaking programs and promotional activities, which reflect participation in industry-sponsored educational or marketing events. This is common in ophthalmology and does not inherently indicate bias, but patients may wish to be aware. Total industry engagement is in the top 1% for ophthalmology in MA.
Geographic Context
Ophthalmologists within 10 mi
534
Per 100K population
32.9
County median income
$126,779
Nearest hospital
MCLEAN HOSPITAL CORPORATION
3.7 mi
3.7 mi
Data Sources
| Provider Registry | ✓ NPPES | Weekly updates |
| Medicare Enrollment | ✓ PECOS | Monthly updates |
| Practice Data | ✓ Medicare Util. | Annual (CY lag) |
| Industry Payments | ✓ Open Payments | CY 2024 |
| Disciplinary History | — Not public | N/A |
This provider has data in 4 of 4 available federal datasets, with a Data Coverage level of Very High. This reflects how much public data is available about a provider. How we calculate this →
Summary
Dr. Chang is a mixed practice specialist, with above-average Medicare volume (top 3% in MA), with speaking/promotional industry engagement in the top 1% of MA peers, with 16 years of NPI registration.
This summary is auto-generated from federal data, describing data availability and patterns. Read our methodology →
Frequently Asked Questions
Is Dr. Chang experienced with eye injection (vabysmo/faricimab)?
Based on Medicare claims data, Dr. Chang performed 9,600 eye injection (vabysmo/faricimab) services. Research suggests that higher procedure volume is often associated with better outcomes, particularly for complex procedures. Note that Medicare data only captures patients aged 65 and older, so the total practice volume across all patients is likely higher.
Does Dr. Chang receive payments from pharmaceutical companies?
Yes. Dr. Chang received a total of $791,917 from 49 companies across 948 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common among physicians — 57% of all U.S. physicians receive at least one industry payment. Patients may wish to ask their doctor about these relationships, especially if a recommended drug or device appears in the payment records.
How do Dr. Chang's costs compare to other ophthalmologists in Waltham?
Dr. Chang's average Medicare payment per service is $79. Note that these figures represent what Medicare pays, not your out-of-pocket cost, which depends on your specific insurance plan and deductible. Procedure-level data above shows both what was submitted and what Medicare paid for each service type.
What does Data Coverage mean?
Data Coverage (currently Very High for Dr. Chang) measures how much public federal data is available about a provider. It is not a quality rating. A "Very High" or "High" level means the provider has data across multiple federal sources (NPPES, PECOS, Medicare Utilization, Open Payments), indicating a long track record of practice, Medicare participation, and industry disclosure. A "Low" or "Moderate" level may simply mean the provider is newer, does not see Medicare patients, or has not received any industry payments — none of which are inherently negative. Read our full methodology →
Is this data up to date?
Each data source has its own update cycle. Provider registry data (NPPES) is updated weekly. Medicare enrollment (PECOS) is updated monthly. Medicare practice data has a ~2 year lag — the most recent available is typically 2 years prior. Industry payment data (Open Payments) is published annually, usually in June, covering the prior calendar year. We display the data date prominently on each section so you always know how current it is. See our data freshness policy →
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About this page
All data on this page is sourced verbatim from public federal records published by the U.S. Centers for Medicare & Medicaid Services (CMS): NPPES ↗, Open Payments ↗, Medicare Provider Utilization ↗, and PECOS. Publication is mandated by the Physician Payments Sunshine Act (§6002 ACA, 42 U.S.C. §1320a-7h) and the Freedom of Information Act.
This page is not medical advice, an endorsement, a recommendation, or a quality rating. Data Coverage reflects data completeness — how much federal information exists for this provider — not clinical performance, patient outcomes, or quality of care. Always verify information directly with the provider and consult a licensed clinician before making medical decisions.
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