Total Payments
$1,015
2023 Payments
$22.43
Companies
10
Transactions
17
Medicare Patients
1,146
Medicare Billing
$151,326
Payment Breakdown by Category
Food & Beverage$1,015 (100.0%)
Payments by Nature
| Nature of Payment | Amount | Transactions | Share |
|---|---|---|---|
| Food and Beverage | $1,015 | 17 | 100.0% |
Top Paying Companies
| Company | Total | Records | Latest Year |
|---|---|---|---|
| UCB, Inc. | $276.88 | 7 | $0 (2019) |
| Shockwave Medical, Inc | $153.18 | 1 | $0 (2022) |
| Medtronic USA, Inc. | $131.58 | 1 | $0 (2017) |
| GENZYME CORPORATION | $125.00 | 1 | $0 (2019) |
| Adamas Pharmaceuticals, Inc. | $114.50 | 1 | $0 (2018) |
| Abbott Laboratories | $109.09 | 1 | $0 (2019) |
| ITI, Inc. | $45.49 | 2 | $0 (2022) |
| SK Life Science, Inc. | $22.54 | 1 | $0 (2020) |
| Genentech USA, Inc. | $22.43 | 1 | $0 (2023) |
| Allergan Inc. | $14.19 | 1 | $0 (2017) |
Payment History by Year
| Year | Amount | Transactions | Top Company |
|---|---|---|---|
| 2023 | $22.43 | 1 | Genentech USA, Inc. ($22.43) |
| 2022 | $198.67 | 3 | Shockwave Medical, Inc ($153.18) |
| 2020 | $22.54 | 1 | SK Life Science, Inc. ($22.54) |
| 2019 | $434.19 | 6 | UCB, Inc. ($200.10) |
| 2018 | $114.50 | 1 | Adamas Pharmaceuticals, Inc. ($114.50) |
| 2017 | $222.55 | 5 | Medtronic USA, Inc. ($131.58) |
All Payment Transactions
17 individual payment records from CMS Open Payments
| Date | Company | Product | Nature | Form | Amount | Type |
|---|---|---|---|---|---|---|
| 06/06/2023 | Genentech USA, Inc. | Venclexta (Biological) | Food and Beverage | In-kind items and services | $22.43 | General |
| Category: BioOncology | ||||||
| 10/21/2022 | Shockwave Medical, Inc | SHOCKWAVE IVL SYSTEM WITH THE SHOCKWAVE C2 CORONARY IVL CATHETER (Device) | Food and Beverage | In-kind items and services | $153.18 | General |
| Category: Lithoplasty | ||||||
| 08/30/2022 | ITI, Inc. | CAPLYTA (Drug) | Food and Beverage | In-kind items and services | $25.97 | General |
| Category: PSYCHIATRY | ||||||
| 06/30/2022 | ITI, Inc. | CAPLYTA (Drug) | Food and Beverage | In-kind items and services | $19.52 | General |
| Category: PSYCHIATRY | ||||||
| 02/04/2020 | SK Life Science, Inc. | — | Food and Beverage | In-kind items and services | $22.54 | General |
| 11/20/2019 | UCB, Inc. | Briviact (Drug) | Food and Beverage | In-kind items and services | $125.97 | General |
| Category: Neurology | ||||||
| 10/03/2019 | GENZYME CORPORATION | AUBAGIO (Drug) | Food and Beverage | In-kind items and services | $125.00 | General |
| Category: MULTIPLE SCLEROSIS | ||||||
| 06/14/2019 | Abbott Laboratories | AMPLATZER Occluders (Device) | Food and Beverage | In-kind items and services | $109.09 | General |
| Category: Cardiac Arrhythmias and Heart Failure | ||||||
| 05/03/2019 | UCB, Inc. | Briviact (Drug) | Food and Beverage | In-kind items and services | $39.49 | General |
| Category: Neurology | ||||||
| 03/01/2019 | UCB, Inc. | Vimpat (Drug) | Food and Beverage | In-kind items and services | $19.99 | General |
| Category: Neurology | ||||||
| 03/01/2019 | UCB, Inc. | Briviact (Drug) | Food and Beverage | In-kind items and services | $14.65 | General |
| Category: Neurology | ||||||
| 10/23/2018 | Adamas Pharmaceuticals, Inc. | GOCOVRI (Drug) | Food and Beverage | In-kind items and services | $114.50 | General |
| Category: PD | ||||||
| 11/12/2017 | Allergan Inc. | BOTOX NEURO REHAB (Drug) | Food and Beverage | In-kind items and services | $14.19 | General |
| Category: NEUROSCIENCE | ||||||
| 09/13/2017 | UCB, Inc. | Vimpat (Drug) | Food and Beverage | In-kind items and services | $29.51 | General |
| Category: Neurology | ||||||
| 08/16/2017 | UCB, Inc. | Briviact (Drug) | Food and Beverage | In-kind items and services | $24.75 | General |
| Category: Neurology | ||||||
| 07/05/2017 | UCB, Inc. | Briviact (Drug) | Food and Beverage | In-kind items and services | $22.52 | General |
| Category: Neurology | ||||||
| 05/03/2017 | Medtronic USA, Inc. | Solitaire (Device) | Food and Beverage | In-kind items and services | $131.58 | General |
| Category: Stents | ||||||
Medicare Billing by Year
| Year | Procedures | Beneficiaries | Services | Submitted | Medicare Paid |
|---|---|---|---|---|---|
| 2023 | 5 | 290 | 370 | $147,410 | $40,157 |
| 2022 | 6 | 256 | 307 | $110,984 | $32,443 |
| 2021 | 6 | 281 | 343 | $96,257 | $37,309 |
| 2020 | 10 | 319 | 398 | $97,733 | $41,417 |
Total Patients
1,146
Total Services
1,418
Medicare Billing
$151,326
Procedure Codes
28
All Medicare Procedures & Services
28 procedure records from CMS Medicare Utilization — Page 1 of 2
| HCPCS | Description | Setting | Year | Patients | Services | Charges | Medicare Paid | Ratio |
|---|---|---|---|---|---|---|---|---|
| 99233 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | Facility | 2023 | 108 | 176 | $63,955 | $17,830 | 27.9% |
| 99222 | Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | Facility | 2023 | 89 | 90 | $33,474 | $9,528 | 28.5% |
| 99223 | Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | Facility | 2023 | 55 | 57 | $31,443 | $8,218 | 26.1% |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | Office | 2023 | 20 | 29 | $10,672 | $2,742 | 25.7% |
| 99204 | New patient office or other outpatient visit, 45-59 minutes | Facility | 2023 | 18 | 18 | $7,866 | $1,840 | 23.4% |
| 99233 | Follow-up hospital inpatient care per day, typically 35 minutes | Facility | 2022 | 93 | 138 | $45,536 | $12,295 | 27.0% |
| 99223 | Initial hospital inpatient care per day, typically 70 minutes | Facility | 2022 | 39 | 39 | $20,657 | $6,425 | 31.1% |
| 99222 | Initial hospital inpatient care per day, typically 50 minutes | Facility | 2022 | 51 | 53 | $18,578 | $6,113 | 32.9% |
| 99204 | New patient office or other outpatient visit, 45-59 minutes | Facility | 2022 | 28 | 28 | $11,774 | $3,244 | 27.6% |
| 99221 | Initial hospital inpatient care per day, typically 30 minutes | Facility | 2022 | 34 | 35 | $9,359 | $2,816 | 30.1% |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | Office | 2022 | 11 | 14 | $5,080 | $1,551 | 30.5% |
| 99233 | Subsequent hospital inpatient care, typically 35 minutes per day | Facility | 2021 | 94 | 156 | $36,188 | $13,610 | 37.6% |
| 99223 | Initial hospital inpatient care, typically 70 minutes per day | Facility | 2021 | 64 | 64 | $26,141 | $10,881 | 41.6% |
| 99222 | Initial hospital inpatient care, typically 50 minutes per day | Facility | 2021 | 56 | 56 | $16,843 | $6,547 | 38.9% |
| 99221 | Initial hospital inpatient care, typically 30 minutes per day | Facility | 2021 | 36 | 36 | $7,979 | $3,209 | 40.2% |
| 99204 | New patient outpatient visit, total time 45-59 minutes | Facility | 2021 | 14 | 14 | $4,807 | $1,621 | 33.7% |
| G0425 | Telehealth consultation, emergency department or initial inpatient, typically 30 minutes communicating with the patient via telehealth | Office | 2021 | 17 | 17 | $4,299 | $1,441 | 33.5% |
| 99233 | Subsequent hospital inpatient care, typically 35 minutes per day | Facility | 2020 | 67 | 112 | $23,792 | $9,877 | 41.5% |
| 99223 | Initial hospital inpatient care, typically 70 minutes per day | Facility | 2020 | 37 | 37 | $13,635 | $6,207 | 45.5% |
| 99214 | Established patient office or other outpatient, visit typically 25 minutes | Office | 2020 | 49 | 72 | $14,400 | $6,026 | 41.8% |
| 99222 | Initial hospital inpatient care, typically 50 minutes per day | Facility | 2020 | 40 | 40 | $10,053 | $4,517 | 44.9% |
| 99215 | Established patient office or other outpatient, visit typically 40 minutes | Office | 2020 | 29 | 33 | $8,745 | $3,815 | 43.6% |
| G0427 | Telehealth consultation, emergency department or initial inpatient, typically 70 minutes or more communicating with the patient via telehealth | Office | 2020 | 22 | 22 | $9,010 | $3,522 | 39.1% |
| 99443 | Physician telephone patient service, 21-30 minutes of medical discussion | Office | 2020 | 19 | 26 | $4,516 | $2,419 | 53.6% |
| 99204 | New patient office or other outpatient visit, typically 45 minutes | Office | 2020 | 12 | 12 | $3,660 | $1,466 | 40.1% |
About Dr. David Hahn, MD
Dr. David Hahn, MD is a Neurology healthcare provider based in Greenwich, Connecticut. This provider has been registered with the National Plan and Provider Enumeration System (NPPES) since 07/28/2010. The National Provider Identifier (NPI) number assigned to this provider is 1053625459.
According to the Centers for Medicare & Medicaid Services (CMS) Open Payments database, Dr. David Hahn, MD has received a total of $1,015 in payments from pharmaceutical and medical device companies, with $22.43 received in 2023. These payments were reported across 17 transactions from 10 companies. The most common payment nature is "Food and Beverage" ($1,015).
As a Medicare-enrolled provider, Hahn has provided services to 1,146 Medicare beneficiaries, totaling 1,418 services with total Medicare billing of $151,326. Data is available for 4 years (2020–2023), covering 28 distinct procedure/service records.
Ad
Practice Information
- Specialty Neurology
- Other Specialties Neurology, Neurology
- Location Greenwich, CT
- Active Since 07/28/2010
- Last Updated 10/28/2025
- Taxonomy Code 2084N0400X
- Entity Type Individual
- NPI Number 1053625459
Products in Payments
- Briviact (Drug) $227.38
- SHOCKWAVE IVL SYSTEM WITH THE SHOCKWAVE C2 CORONARY IVL CATHETER (Device) $153.18
- Solitaire (Device) $131.58
- AUBAGIO (Drug) $125.00
- GOCOVRI (Drug) $114.50
- AMPLATZER Occluders (Device) $109.09
- Vimpat (Drug) $49.50
- CAPLYTA (Drug) $45.49
- Venclexta (Biological) $22.43
- BOTOX NEURO REHAB (Drug) $14.19
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.
Neurology Doctors in Greenwich
Matthew Mcconnell, Md, MD
Neurology — Payments: $14,820
Neurology $14,820
Dr. Stanley Resor, M.d, M.D
Neurology — Payments: $11,272
Neurology $11,272
Dr. Jennifer Werely, M.d, M.D
Neurology — Payments: $11,267
Neurology $11,267
Andrew Michalak, M.d, M.D
Neurology — Payments: $177.76
Neurology $177.76
Dr. James Morris, M.d. Ph.d, M.D. PH.D
Neurology — Payments: $19.67
Neurology $19.67