Dr. Duncan Friedman, M.D.
What this data tells you about Dr. Friedman
Dr. Duncan Friedman is an ophthalmology specialist in San Antonio, TX, with 18 years of NPI registration. Based on federal Medicare data, Dr. Friedman performed 4,896 Medicare services in 2023. These records do not provide a deduplicated patient total.
Between the years covered by Open Payments, Dr. Friedman received a total of $7,348 from 27 pharmaceutical and/or device companies across 94 payment records. A record can group multiple payments. These transfers are publicly reported through CMS Open Payments. Disclosure alone does not establish their effect on care. A reliable breakdown by payment category is not available in this snapshot. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Friedman 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.
Medicare Practice Summary — 2023
Medicare Utilization ↗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 |
|---|---|---|---|
| Retinal imaging (OCT scan) This procedure involves imaging the retina to visualize its structure. It is used to examine the back of the eye. |
1,387 | $28 | $65 |
| Comprehensive eye exam, established patient A comprehensive examination of the visual system performed for a patient who has previously been seen by the provider. |
857 | $85 | $155 |
| 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. |
640 | $11 | $80 |
| Aflibercept eye injection (Eylea) | 564 | $683 | $2,000 |
| Eye injection for retinal disease A procedure involving the administration of medication directly into the eye. |
500 | $87 | $916 |
| 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. |
316 | $61 | $107 |
| Compounded drug, not otherwise classified A medication prepared specifically for an individual patient by a pharmacist or physician, tailored to meet unique needs that cannot be fulfilled by commercially available products. |
190 | $68 | $463 |
| Comprehensive eye exam, new patient A comprehensive examination of the visual system performed for a new patient. |
175 | $96 | $173 |
| 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. |
94 | $44 | $105 |
| Optic nerve imaging (OCT scan) Imaging of the optic nerve. |
60 | $24 | $65 |
| 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. |
22 | $34 | $200 |
| Ultrasound scan of cornea to determine thickness An ultrasound procedure used to measure the thickness of the cornea. |
19 | $8 | $20 |
| 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. |
17 | $95 | $225 |
| Eye drainage system examination An examination of the internal drainage system of the eye to assess how fluid flows and drains from the eye. |
16 | $20 | $63 |
| Retinal photocoagulation to prevent detachment This procedure uses laser light to create small burns on the retina. It is performed to help prevent the retina from detaching from the back of the eye. |
14 | $188 | $1,636 |
| Laser removal of recurring cataract A laser procedure to remove a recurring cataract within the lens capsule. |
13 | $238 | $1,000 |
| Retinal membrane and internal limiting membrane removal A surgical procedure to remove a membrane from the retina along with the internal limiting membrane of the retina. |
12 | $881 | $6,500 |
Industry Payment Transparency
Open Payments through 2024 ↗Payment categories are unavailable while the source breakdown is being rebuilt. Company and year totals do not identify how much belongs to each category.
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
Payments by company (2024)
All-time payments by company (2018-2024) ›
Associated products mentioned in payments ›
Geographic Context
2.8 mi
Data Sources
| Provider Registry | ✓ NPPES | NPPES snapshot; verify current record |
| Medicare Enrollment | ✓ PECOS | PECOS snapshot |
| Practice Data | ✓ Medicare Util. | Annual (CY lag) |
| Industry Payments | ✓ Open Payments | CY 2024 |
| Disciplinary History | — Not included | 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. Friedman is a mixed practice specialist, with above-average Medicare volume (top 18% in TX), with 18 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. Friedman experienced with retinal imaging (oct scan)?
Does Dr. Friedman receive payments from pharmaceutical companies?
How do Dr. Friedman's costs compare to other ophthalmologists in San Antonio?
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This page combines public CMS records with calculated summaries and explanatory procedure labels. These transformations are not verbatim federal records. Sources: 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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