Medicare Enrolled
Dr. Daniel Hyun, MD
Neurology · San Antonio, TX
Practice pattern: Clinical Cardiology
— Primarily office-based clinical cardiology
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. Hyun 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. Hyun
Dr. Daniel Hyun is a neurology specialist in San Antonio, TX, with 21 years of NPI registration. Based on federal Medicare data, Dr. Hyun performed 1,389 Medicare services in 2023. These records do not provide a deduplicated patient total.
Between the years covered by Open Payments, Dr. Hyun received a total of $51,106 from 80 pharmaceutical and/or device companies across 1946 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. Hyun 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.
✓ 21 years of NPI registration
▲ Top 24% volume in TX
$51,106 industry payments
Medicare Practice Summary — 2023
Medicare Utilization ↗1,389
Medicare services
Top 24% in TX for neurology
Not available
Unique patients (not deduplicated)
$113
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
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 |
|---|---|---|---|
| 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. |
764 | $87 | $206 |
| 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. |
155 | $110 | $268 |
| Assessment of and care planning for patient with impaired thought processing, typically 60 minutes | 118 | $194 | $438 |
| Electromyography of arm or leg muscles A test that measures the electrical activity in the muscles of the arm or leg using a needle electrode. It helps evaluate the health of muscles and the nerve cells that control them. |
86 | $74 | $157 |
| EEG, extended monitoring A test that records electrical activity in the brain while the patient is both awake and asleep. |
49 | $332 | $711 |
| Digital analysis of brain wave activity (EEG) This procedure involves the digital analysis of brain wave activity recorded via an electroencephalogram (EEG). It focuses on the technical interpretation of the digital data rather than the initial recording or supervision. |
49 | $209 | $443 |
| 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. |
40 | $131 | $289 |
| Nerve conduction studies, 7-8 tests A series of 7 to 8 nerve conduction tests to evaluate how well nerves are sending signals to muscles. |
26 | $134 | $283 |
| Neuropsychological test evaluation, first hour A professional assessment of cognitive and behavioral functioning using standardized tests. This service covers the initial hour of the evaluation process. |
26 | $95 | $211 |
| Psychological test administration, first 30 minutes A technician administers psychological or neuropsychological testing for the first 30 minutes. |
26 | $24 | $54 |
| New patient office visit, complex (60-74 min) | 19 | $159 | $355 |
| 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. |
16 | $62 | $146 |
| Nerve conduction study, 9-10 studies A diagnostic test that measures how well nerves send electrical signals. It involves performing 9 to 10 separate nerve conduction studies to evaluate nerve function. |
15 | $156 | $342 |
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. These counts do not measure clinical quality or years of experience.
Industry Payment Transparency
Open Payments through 2024 ↗$51,106
Total received (2018-2024)
Avg $7,301/year across 7 years
Top 10% in TX for neurology
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
80
Companies
1,946
Payment records
Payments are publicly reported; disclosure does not establish legality · Not evidence of wrongdoing · How to interpret →
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.
2024
$15,500
2023
$4,589
2022
$5,700
2021
$5,013
2020
$3,953
2019
$4,806
2018
$11,546
Payments by company (2024)
ABBVIE INC.
$5,767
UCB, Inc.
$5,010
ACADIA Pharmaceuticals Inc
$504
PFIZER INC.
$428
Lilly USA, LLC
$337
EMD Serono, Inc.
$316
MDD US Operations, LLC
$286
Teva Pharmaceuticals USA, Inc.
$278
Novartis Pharmaceuticals Corporation
$238
Eisai Inc.
$236
JAZZ PHARMACEUTICALS INC.
$221
Averitas Pharma Inc.
$199
Otsuka America Pharmaceutical, Inc.
$174
Amneal Pharmaceuticals LLC
$161
Neurocrine Biosciences, Inc.
$151
TG Therapeutics, Inc.
$146
Kyowa Kirin, Inc.
$142
Sumitomo Pharma America, Inc.
$138
ARGENX US, INC.
$117
Lundbeck LLC
$113
Neurelis, Inc.
$88
Alexion Pharmaceuticals, Inc.
$66
Acorda Therapeutics, Inc
$60
CATALYST PHARMACEUTICALS, INC.
$58
GE HEALTHCARE
$51
Azurity Pharmaceuticals, Inc.
$37
InSightec,Inc
$31
SK Life Science, Inc.
$30
Medtronic, Inc.
$30
Celgene Corporation
$28
Genentech USA, Inc.
$28
Abbott Laboratories
$17
Currax Pharmaceuticals LLC
$15
Top 3 companies account for 72.8% of 2024 payments
All-time payments by company (2018-2024) ›
UCB, Inc.
$7,507
ABBVIE INC.
$6,500
Teva Pharmaceuticals USA, Inc.
$6,390
Supernus Pharmaceuticals, Inc.
$4,575
ACADIA Pharmaceuticals Inc
$2,463
Amgen Inc.
$2,037
Neurocrine Biosciences, Inc.
$1,605
Kyowa Kirin, Inc.
$1,226
Novartis Pharmaceuticals Corporation
$1,179
Lilly USA, LLC
$1,019
Acorda Therapeutics, Inc
$1,015
Amneal Pharmaceuticals LLC
$995
Sunovion Pharmaceuticals Inc.
$867
MDD US Operations, LLC
$860
SK Life Science, Inc.
$797
EMD Serono, Inc.
$739
US WorldMeds, LLC
$674
Lundbeck LLC
$625
Biogen, Inc.
$613
PFIZER INC.
$590
JAZZ PHARMACEUTICALS INC.
$580
Allergan, Inc.
$537
Alexion Pharmaceuticals, Inc.
$517
Avanir Pharmaceuticals, Inc.
$433
Eisai Inc.
$426
Adamas Pharmaceuticals, Inc.
$404
Biohaven Pharmaceutical Holding Company Ltd.
$387
Sumitomo Pharma America, Inc.
$317
Otsuka America Pharmaceutical, Inc.
$271
AbbVie Inc.
$241
Averitas Pharma Inc.
$240
GE HEALTHCARE
$233
EISAI INC.
$222
Allergan Inc.
$192
ARGENX US, INC.
$187
Genentech USA, Inc.
$183
GENZYME CORPORATION
$178
GE HealthCare
$174
Avion Pharmaceuticals
$172
Biohaven Pharmaceuticals, Inc.
$168
Upsher-Smith Laboratories LLC
$168
E.R. Squibb & Sons, L.L.C.
$163
TG THERAPEUTICS, INC.
$162
IMPEL PHARMACEUTICALS INC.
$157
Greenwich Biosciences, Inc.
$151
TG Therapeutics, Inc.
$146
Neurelis, Inc.
$129
Abbott Laboratories
$125
Impax Laboratories, Inc.
$124
GE Healthcare
$117
GRT US Holding, Inc.
$98
Medtronic, Inc.
$96
Janssen Pharmaceuticals, Inc
$83
Alnylam Pharmaceuticals Inc.
$80
Nevro Corp.
$78
Catalyst Pharmaceuticals, Inc.
$73
Corium, LLC
$71
LivaNova USA, Inc.
$70
Medtronic USA, Inc.
$68
ARBOR PHARMACEUTICALS, INC.
$62
CATALYST PHARMACEUTICALS, INC.
$58
Celgene Corporation
$50
Arbor Pharmaceuticals, Inc.
$41
UPSHER-SMITH LABORATORIES LLC
$41
CSL Behring
$39
Azurity Pharmaceuticals, Inc.
$37
Merz North America, Inc.
$37
InSightec,Inc
$31
Vanda Pharmaceuticals Inc.
$24
AQUESTIVE THERAPEUTICS, INC.
$22
Scilex Pharmaceuticals Inc.
$22
Zogenix Inc.
$21
Promius Pharma LLC
$20
Aprecia Pharmaceuticals, LLC
$18
AbbVie, Inc.
$17
Vertical Pharmaceuticals, LLC
$17
SANOFI-AVENTIS U.S. LLC
$17
Currax Pharmaceuticals LLC
$15
Grifols USA, LLC
$12
Assertio Therapeutics, Inc.
$11
Top 3 companies account for 39.9% of all-time payments
Associated products mentioned in payments ›
ACTIVA · ADLARITY · ADUHELM · AIMOVIG · AJOVY · AMPYRA · AMYVID · APOKYN · APTIOM · AUBAGIO · AUSTEDO · AVONEX · Adlarity · Aimovig · Austedo XR · BOTOX · BOTOX THERAPEUTIC · BRIUMVI · Briviact · CAMBIA · COMIRNATY · COPAXONE · Cenobamate · DAYBUE · DIVIGEL · DUOPA · Dhivy · Duopa · EMGALITY · EPIDIOLEX · Enspryng · Epidiolex · Exablate · FYCOMPA · Fintepla · Fycompa · GILENYA · GOCOVRI · Gamunex-C · Gocovri · HETLIOZ · HORIZANT · Hizentra · Horizant · INBRIJA · INFINITY · INGREZZA · Infinity DBS Pulse Generators · KESIMPTA · KISUNLA · KYNMOBI · LEMTRADA · LYRICA · Leqembi · MAVENCLAD · MYOBLOC · Mavenclad · NAMZARIC · NORTHERA · NOURIANZ · NUEDEXTA · NUPLAZID · NURTEC ODT · Nayzilam · Neupro · Nourianz · Nuedexta · OCREVUS · ONGENTYS · ONGENTYS 50MG CAPSULES 30 · ONPATTRO · ONZETRA XSAIL · OXTELLAR XR · Omnia · Ongentys · PERCEPT PC BRAINSENSE · Ponvory · QUDEXY XR Topiramate Extended Release Capsules · QULIPTA · QUTENZA · Qutenza · REXULTI · RYTARY · Rebif · Rystiggo · SENSIGHT · SOLIRIS · SUNOSI · SYMPAZAN · SenSight · Senza Spinal Cord Stimulation System · Soliris · Spritam · TECFIDERA · TOSYMRA · TOSYMRA SUMATRIPTAN NASAL SPRAY · TROKENDI XR · TYSABRI · Tosymra Sumatriptan Nasal Spray · Trudhesa · UBRELVY · ULTOMIRIS · VALTOCO · VNS Therapy · VUMERITY · VYALEV · VYEPTI · VYVGART · VYVGART HYTRULO · Vimpat · XADAGO · XCOPRI · XEOMIN · Xadago · ZEPOSIA · ZTLido · Zembrace
Should you be concerned? Industry payments are disclosed through CMS Open Payments. Disclosure alone does not establish their purpose, legality, or effect on care. 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 →
Geographic Context
Neurologists in nearby ZIP areas
115
County median income
$70,571
Nearest hospital to ZIP centroid (approximate)
WESTOVER HILLS BAPTIST HOSPITAL
0.0 mi
0.0 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. Hyun is a clinical cardiology specialist, with above-average Medicare volume (top 24% in TX), with 21 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. Hyun experienced with office visit, established patient (30-39 min)?
Based on Medicare claims data, Dr. Hyun performed 764 office visit, established patient (30-39 min) services. These records cover Medicare fee-for-service activity, including eligible younger beneficiaries; they do not measure total practice volume or clinical quality.
Does Dr. Hyun receive payments from pharmaceutical companies?
Yes. Dr. Hyun received a total of $51,106 from 80 companies across 1,946 payment records. A record can group multiple payments. These transfers are publicly disclosed through CMS Open Payments. Disclosure alone does not establish their legality or effect on care. 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. Hyun's costs compare to other neurologists in San Antonio?
Dr. Hyun's average Medicare payment per service is $113. 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. Hyun) 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 the presence of registry, enrollment, activity or payment records, not verified experience or clinical quality. 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?
Source publication dates and the snapshots loaded on this site can differ. Rebuilding a page does not refresh its source records. Check the Medicare reporting year and the payment interval shown above; consult the linked official sources for newer releases and current registry details. See our data freshness policy →
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About this page
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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