Medicare Enrolled
Dr. Nelson Hwynn, DO
Neurology · La Jolla, CA
Practice pattern: Mixed Practice
— Diverse clinical practice across multiple procedure types
Low-engagement
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. Hwynn 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. Hwynn
Dr. Nelson Hwynn is a neurology specialist in La Jolla, CA, with 19 years of NPI registration. Based on federal Medicare data, Dr. Hwynn performed 18,101 Medicare services across 804 unique beneficiaries.
Between the years covered by Open Payments, Dr. Hwynn received a total of $36,345 from 83 pharmaceutical and/or device companies across 1173 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in neurology. Most payments are for meals and travel — low-value interactions common across virtually all practicing physicians. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Hwynn 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.
✓ 19 years in practice
▲ Top 6% volume in CA
$36,345 industry payments
Medicare Practice Summary
Medicare Utilization ↗18,101
Medicare services
Top 6% in CA for neurology
804
Unique beneficiaries
$10
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~953 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 |
|---|---|---|---|
| Botox injection (Xeomin), per unit An injection of incobotulinumtoxin A, a botulinum toxin type A product, administered in a quantity of one unit. |
17,150 | $4 | $17 |
| 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. |
193 | $101 | $350 |
| 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. |
165 | $144 | $491 |
| 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. |
159 | $85 | $346 |
| 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. |
57 | $67 | $248 |
| Chemical nerve block for neck muscles Injection of a chemical agent to paralyze specific muscles on the side of the neck, excluding the voice box. |
55 | $151 | $975 |
| Chemical nerve block for facial paralysis Injection of a chemical agent to paralyze specific nerves or muscles on the side of the face. |
43 | $151 | $894 |
| 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. |
42 | $127 | $453 |
| 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. |
40 | $152 | $610 |
| New patient office visit, complex (60-74 min) | 34 | $180 | $598 |
| Office visit, established patient (10-19 min) An office visit for an existing patient lasting 10 to 19 minutes. The visit involves medical evaluation and management of the patient's condition. |
29 | $39 | $156 |
| 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. |
28 | $164 | $733 |
| Nerve conduction studies, 11-12 A diagnostic test that measures how well nerves send electrical signals. It involves performing 11 to 12 separate nerve conduction studies. |
27 | $210 | $852 |
| Electronic analysis of implanted neurostimulator Electronic evaluation of an implanted brain, spinal cord, or peripheral nerve stimulator device. |
27 | $16 | $61 |
| Nerve conduction studies, 13 or more A diagnostic test that measures how well nerves send electrical signals. This code applies when 13 or more individual nerve studies are performed. |
18 | $242 | $984 |
| New patient office visit (30-44 min) An initial office visit for a new patient lasting between 30 and 44 minutes. This code is used when the total time spent on the date of the encounter falls within this range. |
18 | $88 | $305 |
| Prolonged office E/M service, first 15 minutes This code is used for additional time spent by a physician beyond the maximum required time of a primary office or outpatient evaluation and management service. It is billed in 15-minute increments based on total time spent on the date of the primary service. |
16 | $27 | $88 |
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.
Industry Payment Transparency
Open Payments through 2024 ↗$36,345
Total received (2018-2024)
Avg $5,192/year across 7 years
Top 11% in CA for neurology
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
83
Companies
1,173
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.
Meals & Travel
Food, beverages, travel, and lodging — typically low-value
$29,302 (80.6%)
Speaking / Promotional
Speaker programs, honoraria, and industry-sponsored educational events
$5,484 (15.1%)
Consulting
Expert advisory fees, typically reflecting recognized clinical expertise
$1,559 (4.3%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$6,855
2023
$5,157
2022
$4,353
2021
$3,133
2020
$3,341
2019
$9,652
2018
$3,855
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
Boston Scientific Corporation
$1,149
ABBVIE INC.
$753
MDD US Operations, LLC
$657
Teva Pharmaceuticals USA, Inc.
$379
Alexion Pharmaceuticals, Inc.
$323
Abbott Laboratories
$301
UCB, Inc.
$285
Kyowa Kirin, Inc.
$270
PFIZER INC.
$267
Amneal Pharmaceuticals LLC
$247
Neurocrine Biosciences, Inc.
$233
ACADIA Pharmaceuticals Inc
$204
Novartis Pharmaceuticals Corporation
$191
Medtronic, Inc.
$187
Takeda Pharmaceuticals U.S.A., Inc.
$178
Alnylam Pharmaceuticals Inc.
$177
ARGENX US, INC.
$110
SK Life Science, Inc.
$106
Lundbeck LLC
$104
Ipsen Biopharmaceuticals, Inc
$99
Lilly USA, LLC
$93
Amgen Inc.
$81
Eisai Inc.
$65
Merz Pharmaceuticals, LLC
$64
Novo Nordisk Inc
$61
Neurelis, Inc.
$58
MITSUBISHI TANABE PHARMA AMERICA, INC.
$44
CATALYST PHARMACEUTICALS, INC.
$33
Biogen, Inc.
$31
SCILEX PHARMACEUTICALS INC.
$20
EMD Serono, Inc.
$19
Averitas Pharma Inc.
$19
Octapharma USA, Inc.
$17
Otsuka America Pharmaceutical, Inc.
$15
Tonix Medicines, Inc.
$14
Top 3 companies account for 37.3% of 2024 payments
All-time payments by company (2018-2024) ›
Lundbeck LLC
$5,800
Boston Scientific Corporation
$3,841
Abbott Laboratories
$2,470
ABBVIE INC.
$1,908
Medtronic, Inc.
$1,829
ACADIA Pharmaceuticals Inc
$1,790
Neurocrine Biosciences, Inc.
$1,773
Acorda Therapeutics, Inc
$1,768
MDD US Operations, LLC
$986
Adamas Pharmaceuticals, Inc.
$954
Alexion Pharmaceuticals, Inc.
$911
Sunovion Pharmaceuticals Inc.
$776
Novartis Pharmaceuticals Corporation
$682
Kyowa Kirin, Inc.
$677
UCB, Inc.
$640
PFIZER INC.
$611
Amgen Inc.
$586
Teva Pharmaceuticals USA, Inc.
$570
Amneal Pharmaceuticals LLC
$523
Ipsen Biopharmaceuticals, Inc
$424
AbbVie Inc.
$405
AbbVie, Inc.
$388
Lilly USA, LLC
$380
Medtronic USA, Inc.
$341
US WorldMeds, LLC
$331
ARGENX US, INC.
$319
Biohaven Pharmaceutical Holding Company Ltd.
$302
Allergan Inc.
$294
SK Life Science, Inc.
$262
UPSHER-SMITH LABORATORIES LLC
$255
Merz North America, Inc.
$225
CSL Behring
$219
Takeda Pharmaceuticals U.S.A., Inc.
$192
Alnylam Pharmaceuticals Inc.
$191
Avanir Pharmaceuticals, Inc.
$183
BOSTON SCIENTIFIC CORPORATION
$162
Biogen, Inc.
$153
Merz Pharmaceuticals, LLC
$151
Upsher-Smith Laboratories LLC
$150
Supernus Pharmaceuticals, Inc.
$131
Allergan, Inc.
$114
GE HEALTHCARE
$113
Neurelis, Inc.
$107
InSightec,Inc
$102
GENZYME CORPORATION
$89
Eisai Inc.
$87
MITSUBISHI TANABE PHARMA AMERICA, INC.
$84
Saol Therapeutics Inc.
$63
Biohaven Pharmaceuticals, Inc.
$62
Cala Health, Inc.
$61
Novo Nordisk Inc
$61
GE HealthCare
$52
Avion Pharmaceuticals
$51
Mitsubishi Tanabe Pharma America, Inc.
$48
Rochester Medical Corporation
$43
Bausch Health US, LLC
$40
TerSera Therapeutics LLC
$40
Vertical Pharmaceuticals, LLC
$35
EMD Serono, Inc.
$33
CATALYST PHARMACEUTICALS, INC.
$33
Impax Laboratories, Inc.
$31
Catalyst Pharmaceuticals, Inc.
$28
HARMONY BIOSCIENCES LLC
$27
Almatica Pharma LLC
$26
IMPEL PHARMACEUTICALS INC.
$25
Grifols USA, LLC
$25
Horizon Therapeutics plc
$25
Promius Pharma LLC
$24
Janssen Pharmaceuticals, Inc
$22
INSIGHTEC,INC
$22
MERZ NORTH AMERICA, INC.
$22
Vanda Pharmaceuticals Inc.
$21
Greenwich Biosciences, Inc.
$20
SCILEX PHARMACEUTICALS INC.
$20
Scilex Pharmaceuticals Inc.
$19
Averitas Pharma Inc.
$19
Octapharma USA, Inc.
$17
Otsuka America Pharmaceutical, Inc.
$15
W. L. Gore & Associates, Inc.
$15
Tonix Medicines, Inc.
$14
ASSERTIO THERAPEUTICS, Inc.
$14
Bayer HealthCare Pharmaceuticals Inc.
$13
Travere Therapeutics, Inc.
$10
Top 3 companies account for 33.3% of all-time payments
Associated products mentioned in payments ›
ACTIVA · AFINITOR · AGAMREE · AIMOVIG · AJOVY · ALSUMA · AMPYRA · AMVUTTRA · AMYVID · APOKYN · APTIOM · AUBAGIO · Aimovig · Apokyn · Austedo XR · BOTOX · BOTOX THERAPEUTIC · Betaseron · Briviact · CALA TRIO · CARDIOFORM Septal Occluder · COPAXONE · CREXONT · Cambia · Cholbam · DIVIGEL · DUOPA · DYSPORT · Dhivy · Duopa · Dysport · EMGALITY · Enbrel · Epidiolex · Exablate · FIRDAPSE · Fycompa · GAMMAGARD · GENERAL - DBS · GOCOVRI · Gamunex-C · General - DBS · Gocovri · HYQVIA · Hetlioz · Hizentra · INBRIJA · INFINITY · INGREZZA · Infinity DBS Pulse Generators · KESIMPTA · KISUNLA · KYNMOBI · LEMTRADA · LYRICA · Leqembi · Lioresal (baclofen) · MAVENCLAD · MAYZENT · MIGRANAL · MYOBLOC · NAPRELAN · NORTHERA · NOURIANZ · NUEDEXTA · NUPLAZID · NURTEC ODT · Neupro · Nourianz · OCTAGAM IMMUNE GLOBULIN (HUMAN) · ONGENTYS · ONPATTRO · ONZETRA Xsail · OSMOLEX ER · Ongentys · Ozempic · PAXLOVID · PERCEPT PC BRAINSENSE · Privigen · Proclaim IPG · Prolia · QUDEXY XR Topiramate Extended Release Capsules · QULIPTA · QUTENZA · Quzyttir · RADICAVA · RYTARY · Radicava · Rybelsus · SENSIGHT · SOLIRIS · SPINRAZA · SenSight · Soliris · TOSYMRA · TOSYMRA SUMATRIPTAN NASAL SPRAY · TROKENDI XR · TYSABRI · Trudhesa · UBRELVY · ULTOMIRIS · UPLIZNA · VALTOCO · VERCISE · VUMERITY · VYALEV · VYEPTI · VYVGART · VYVGART HYTRULO · Vercise · Wakix · XARELTO · XEOMIN · Xadago · Xeomin · ZAVZPRET · ZEMBRACE SYMTOUCH · ZTLido · Zembrace · Zembrace SymTouch Sumatriptan Injection · Zilbrysq
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 →
Most payments (81%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians.
Geographic Context
Neurologists within 10 mi
195
Per 100K population
5.9
County median income
$102,285
Nearest hospital
SCRIPPS MEMORIAL HOSPITAL LA JOLLA
0.0 mi
0.0 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. Hwynn is a mixed practice specialist, with above-average Medicare volume (top 6% in CA), with low-engagement industry engagement in the top 11% of CA peers, with 19 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. Hwynn experienced with botox injection (xeomin), per unit?
Based on Medicare claims data, Dr. Hwynn performed 17,150 botox injection (xeomin), per unit 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. Hwynn receive payments from pharmaceutical companies?
Yes. Dr. Hwynn received a total of $36,345 from 83 companies across 1,173 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. Hwynn's costs compare to other neurologists in La Jolla?
Dr. Hwynn's average Medicare payment per service is $10. 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. Hwynn) 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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