Covered recipient · General Payments record
CLAN H HAHN
Allopathic & Osteopathic Physicians Internal Medicine Hematology & Oncology
A name match is not confirmation of identity. CMS publishes records for different people under similar names; the NPI, specialty, and location shown on this page are the CMS-published fields that distinguish them.
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General Payments · PY2023 · Entire year
$2,335.67
92 records · 0 disputed
“Financial relationships do not necessarily indicate an improper relationship; the data is open to interpretation.”
— Centers for Medicare & Medicaid Services, Open Payments
A reported payment reflects a financial relationship a company disclosed. It does not indicate wrongdoing or a conflict of interest, and it says nothing about the quality of a provider's care.
These records are submitted to CMS and attested to by the reporting companies. CMS publishes them as reported; this site mirrors them without independent verification.
A payment attributed to a provider may have been made to a third party — a hospital, practice, or research institution — rather than paid to the provider personally.
How these totals are calculated
- This total is the sum of the individual General Payments record amounts CMS published for the labeled program year(s); each record amount is used unmodified. The total itself is computed by this site. Nothing is estimated, weighted, or combined across categories.
- General Payments only. Research and Ownership/Investment are separate datasets and are never summed with these figures; amounts are kept separate per program year.
- Methodology & Data — sourcing, labeling, and limitations.
Provider summaries generated . CMS updates this data on an annual cycle, and corrections or successful disputes made at CMS may not yet appear here. The official CMS record is authoritative for the current state. View the official CMS record ↗
By nature of payment
PY2023 · entire year · sorted by reported total
| Nature of payment | Amount | Records |
|---|---|---|
| Food and Beverage | $2,335.67 | 92 |
By paying entity
PY2023 · entire year · sorted by reported total
| Paying entity | Amount | Records |
|---|---|---|
| E.R. Squibb & Sons, L.L.C. | $582.57 | 22 |
| PFIZER INC. | $247.74 | 11 |
| Novartis Pharmaceuticals Corporation | $198.44 | 9 |
| Merck Sharp & Dohme LLC | $193.27 | 8 |
| Exelixis Inc. | $168.97 | 5 |
| Celgene Corporation | $155.21 | 7 |
| Genentech USA, Inc. | $129.45 | 6 |
| Gilead Sciences, Inc. | $105.56 | 4 |
| AstraZeneca Pharmaceuticals LP | $94.55 | 4 |
| Secura Bio, Inc. | $72.21 | 1 |
| Regeneron Healthcare Solutions, Inc. | $67.30 | 2 |
| PharmaEssentia USA Corporation | $55.92 | 2 |
| Amgen Inc. | $53.16 | 2 |
| ImmunoGen, Inc. | $38.42 | 2 |
| EMD Serono, Inc. | $34.93 | 1 |
| Deciphera Pharmaceuticals Inc. | $30.19 | 1 |
| Bayer Healthcare Pharmaceuticals Inc. | $27.48 | 1 |
| Takeda Pharmaceuticals U.S.A., Inc. | $26.57 | 1 |
| Mirati Therapeutics, Inc. | $25.10 | 1 |
| Boston Scientific Corporation | $15.00 | 1 |
| BeiGene USA, Inc. | $13.63 | 1 |
Page 1 of 2; records 1–50 of 92 matching records. This page contains 50 records (maximum 50), not the full filtered export. Use the CSV download for all matching records.
IndustryPayments · General Payments
CLAN H HAHN
NPI 1023043189 · CMS profile ID 46297
Allopathic & Osteopathic Physicians / Internal Medicine / Hematology & Oncology
LOS ANGELES, CA
A name match is not confirmation of identity. CMS publishes records for different people under similar names; the NPI, specialty, and location shown on this page are the CMS-published fields that distinguish them.
A payment attributed to a provider may have been made to a third party — a hospital, practice, or research institution — rather than paid to the provider personally.
General Payments, PY2023; Recipient scope: Physicians and non-physician practitioners; Reporting company: All reporting companies; Nature of payment: All payment types
Data edition: cms-20260630-workflow-20261105-v2; CMS publication: 2026-06-30; records imported: 2026-11-05T09:06:52.159882+00:00
Page 1 of 2; records 1–50 of 92 matching records. This page contains 50 records (maximum 50), not the full filtered export.
Filtered page: https://industrypayments.org/provider/npi-1023043189?year=2023&recipient=provider#records-h
CMS source: https://openpaymentsdata.cms.gov/dataset/fb3a65aa-c901-4a38-a813-b04b00dfa2a9
Cite these filtered records
The citation includes this program year, filters, data edition, and page of results.
- Plain
- CLAN H HAHN, NPI 1023043189, CMS profile ID 46297. General Payments, PY2023; Recipient scope: Physicians and non-physician practitioners; Reporting company: All reporting companies; Nature of payment: All payment types. Data edition: cms-20260630-workflow-20261105-v2; CMS publication: 2026-06-30; records imported: 2026-11-05T09:06:52.159882+00:00. Page 1 of 2; records 1–50 of 92 matching records. This page contains 50 records (maximum 50), not the full filtered export. IndustryPayments. https://industrypayments.org/provider/npi-1023043189?year=2023&recipient=provider#records-h. Source: https://openpaymentsdata.cms.gov/dataset/fb3a65aa-c901-4a38-a813-b04b00dfa2a9.
- APA 7
- IndustryPayments. (2026). CLAN H HAHN, NPI 1023043189, CMS profile ID 46297. General Payments, PY2023; Recipient scope: Physicians and non-physician practitioners; Reporting company: All reporting companies; Nature of payment: All payment types. Data edition: cms-20260630-workflow-20261105-v2; CMS publication: 2026-06-30; records imported: 2026-11-05T09:06:52.159882+00:00. Page 1 of 2; records 1–50 of 92 matching records. This page contains 50 records (maximum 50), not the full filtered export. [Filtered data set page]. https://industrypayments.org/provider/npi-1023043189?year=2023&recipient=provider#records-h. Source: https://openpaymentsdata.cms.gov/dataset/fb3a65aa-c901-4a38-a813-b04b00dfa2a9.
- Bluebook
- CLAN H HAHN, NPI 1023043189, CMS profile ID 46297, IndustryPayments, General Payments, PY2023; Recipient scope: Physicians and non-physician practitioners; Reporting company: All reporting companies; Nature of payment: All payment types (Data edition: cms-20260630-workflow-20261105-v2; CMS publication: 2026-06-30; records imported: 2026-11-05T09:06:52.159882+00:00). Page 1 of 2; records 1–50 of 92 matching records. This page contains 50 records (maximum 50), not the full filtered export. Source: https://openpaymentsdata.cms.gov/dataset/fb3a65aa-c901-4a38-a813-b04b00dfa2a9. https://industrypayments.org/provider/npi-1023043189?year=2023&recipient=provider#records-h.
Centers for Medicare & Medicaid Services, Open Payments
Citation formats are provided for reference; check the requirements of your publication.
Payment records · PY2023
Ordering applied by this site (date, newest first, then paying entity) · record values are shown as CMS published them
General Payments · PY2023 · Physicians and non-physician practitioners · CMS publication 2026-06-30
92 matching records · $2,335.67 reported total · 0 disputed
Nature of payment: All payment types
Records imported here (UTC).
CSV includes CMS record IDs, source and publication dates, the data edition, and a link to these filters. Formula-like text cells are prefixed with an apostrophe for spreadsheet safety.
Showing records 1–50 of 92.
| Paying entity | Amount | Date | Nature of payment | Dispute status | Publication flags | Published | Record ID | Source |
|---|---|---|---|---|---|---|---|---|
| Bayer Healthcare Pharmaceuticals Inc. | $27.48 | 12/19/2023 | Food and Beverage | No dispute reported | Delay: No Change: UNCHANGED | 06/30/2026 | 1000525003 | CMS |
| Regeneron Healthcare Solutions, Inc. | $31.33 | 12/16/2023 | Food and Beverage | No dispute reported | Delay: No Change: UNCHANGED | 06/30/2026 | 999200407 | CMS |
| PFIZER INC. | $27.38 | 12/15/2023 | Food and Beverage | No dispute reported | Delay: No Change: UNCHANGED | 06/30/2026 | 1050599219 | CMS |
| Mirati Therapeutics, Inc. | $25.10 | 12/13/2023 | Food and Beverage | No dispute reported | Delay: No Change: UNCHANGED | 06/30/2026 | 1057992113 | CMS |
| Merck Sharp & Dohme LLC | $29.38 | 12/11/2023 | Food and Beverage | No dispute reported | Delay: No Change: UNCHANGED | 06/30/2026 | 1048270331 | CMS |
| Celgene Corporation | $23.06 | 12/06/2023 | Food and Beverage | No dispute reported | Delay: No Change: UNCHANGED | 06/30/2026 | 1015407113 | CMS |
| PFIZER INC. | $33.70 | 12/05/2023 | Food and Beverage | No dispute reported | Delay: No Change: UNCHANGED | 06/30/2026 | 1050592481 | CMS |
| E.R. Squibb & Sons, L.L.C. | $29.05 | 11/28/2023 | Food and Beverage | No dispute reported | Delay: No Change: UNCHANGED | 06/30/2026 | 1015407105 | CMS |
| Merck Sharp & Dohme LLC | $26.75 | 11/22/2023 | Food and Beverage | No dispute reported | Delay: No Change: UNCHANGED | 06/30/2026 | 1048724409 | CMS |
| Regeneron Healthcare Solutions, Inc. | $35.97 | 11/22/2023 | Food and Beverage | No dispute reported | Delay: No Change: UNCHANGED | 06/30/2026 | 999200403 | CMS |
| Exelixis Inc. | $25.86 | 11/17/2023 | Food and Beverage | No dispute reported | Delay: No Change: UNCHANGED | 06/30/2026 | 1044623497 | CMS |
| E.R. Squibb & Sons, L.L.C. | $29.62 | 11/15/2023 | Food and Beverage | No dispute reported | Delay: No Change: UNCHANGED | 06/30/2026 | 1015407089 | CMS |
| Gilead Sciences, Inc. | $29.32 | 11/14/2023 | Food and Beverage | No dispute reported | Delay: No Change: UNCHANGED | 06/30/2026 | 1025570399 | CMS |
| Novartis Pharmaceuticals Corporation | $0.85 | 11/09/2023 | Food and Beverage | No dispute reported | Delay: No Change: UNCHANGED | 06/30/2026 | 992112473 | CMS |
| Novartis Pharmaceuticals Corporation | $24.06 | 11/09/2023 | Food and Beverage | No dispute reported | Delay: No Change: UNCHANGED | 06/30/2026 | 992112478 | CMS |
| Gilead Sciences, Inc. | $28.81 | 11/07/2023 | Food and Beverage | No dispute reported | Delay: No Change: UNCHANGED | 06/30/2026 | 1025574249 | CMS |
| Exelixis Inc. | $27.83 | 11/02/2023 | Food and Beverage | No dispute reported | Delay: No Change: UNCHANGED | 06/30/2026 | 1044615831 | CMS |
| PFIZER INC. | $33.38 | 11/01/2023 | Food and Beverage | No dispute reported | Delay: No Change: UNCHANGED | 06/30/2026 | 1050573277 | CMS |
| E.R. Squibb & Sons, L.L.C. | $31.53 | 10/31/2023 | Food and Beverage | No dispute reported | Delay: No Change: UNCHANGED | 06/30/2026 | 1015407081 | CMS |
| Secura Bio, Inc. | $72.21 | 10/27/2023 | Food and Beverage | No dispute reported | Delay: No Change: CHANGED | 06/30/2026 | 1053101699 | CMS |
| Merck Sharp & Dohme LLC | $21.21 | 10/26/2023 | Food and Beverage | No dispute reported | Delay: No Change: UNCHANGED | 06/30/2026 | 1048270463 | CMS |
| BeiGene USA, Inc. | $13.63 | 10/25/2023 | Food and Beverage | No dispute reported | Delay: No Change: UNCHANGED | 06/30/2026 | 1051186871 | CMS |
| PFIZER INC. | $26.92 | 10/24/2023 | Food and Beverage | No dispute reported | Delay: No Change: UNCHANGED | 06/30/2026 | 1050666069 | CMS |
| PFIZER INC. | $4.31 | 10/18/2023 | Food and Beverage | No dispute reported | Delay: No Change: UNCHANGED | 06/30/2026 | 1050674411 | CMS |
| EMD Serono, Inc. | $34.93 | 10/12/2023 | Food and Beverage | No dispute reported | Delay: No Change: UNCHANGED | 06/30/2026 | 1032347657 | CMS |
| ImmunoGen, Inc. | $15.84 | 10/11/2023 | Food and Beverage | No dispute reported | Delay: No Change: UNCHANGED | 06/30/2026 | 1017247155 | CMS |
| Genentech USA, Inc. | $28.83 | 10/10/2023 | Food and Beverage | No dispute reported | Delay: No Change: UNCHANGED | 06/30/2026 | 1040331357 | CMS |
| Gilead Sciences, Inc. | $23.22 | 10/06/2023 | Food and Beverage | No dispute reported | Delay: No Change: UNCHANGED | 06/30/2026 | 1025701159 | CMS |
| Celgene Corporation | $23.36 | 10/04/2023 | Food and Beverage | No dispute reported | Delay: No Change: UNCHANGED | 06/30/2026 | 1015407057 | CMS |
| PharmaEssentia USA Corporation | $24.13 | 09/28/2023 | Food and Beverage | No dispute reported | Delay: No Change: UNCHANGED | 06/30/2026 | 1059311487 | CMS |
| Gilead Sciences, Inc. | $24.21 | 09/27/2023 | Food and Beverage | No dispute reported | Delay: No Change: UNCHANGED | 06/30/2026 | 1025665607 | CMS |
| Novartis Pharmaceuticals Corporation | $24.14 | 09/21/2023 | Food and Beverage | No dispute reported | Delay: No Change: UNCHANGED | 06/30/2026 | 992112466 | CMS |
| E.R. Squibb & Sons, L.L.C. | $29.64 | 09/20/2023 | Food and Beverage | No dispute reported | Delay: No Change: UNCHANGED | 06/30/2026 | 1015407023 | CMS |
| Takeda Pharmaceuticals U.S.A., Inc. | $26.57 | 09/19/2023 | Food and Beverage | No dispute reported | Delay: No Change: UNCHANGED | 06/30/2026 | 1055397821 | CMS |
| Exelixis Inc. | $31.20 | 09/13/2023 | Food and Beverage | No dispute reported | Delay: No Change: UNCHANGED | 06/30/2026 | 1044597575 | CMS |
| Novartis Pharmaceuticals Corporation | $25.41 | 09/06/2023 | Food and Beverage | No dispute reported | Delay: No Change: UNCHANGED | 06/30/2026 | 992112453 | CMS |
| Novartis Pharmaceuticals Corporation | $1.00 | 09/06/2023 | Food and Beverage | No dispute reported | Delay: No Change: UNCHANGED | 06/30/2026 | 992112458 | CMS |
| E.R. Squibb & Sons, L.L.C. | $14.18 | 08/30/2023 | Food and Beverage | No dispute reported | Delay: No Change: UNCHANGED | 06/30/2026 | 1015407007 | CMS |
| E.R. Squibb & Sons, L.L.C. | $1.99 | 08/30/2023 | Food and Beverage | No dispute reported | Delay: No Change: UNCHANGED | 06/30/2026 | 1015407015 | CMS |
| Genentech USA, Inc. | $7.92 | 08/28/2023 | Food and Beverage | No dispute reported | Delay: No Change: UNCHANGED | 06/30/2026 | 1040331369 | CMS |
| AstraZeneca Pharmaceuticals LP | $27.93 | 08/23/2023 | Food and Beverage | No dispute reported | Delay: No Change: UNCHANGED | 06/30/2026 | 1011348545 | CMS |
| PFIZER INC. | $29.34 | 08/22/2023 | Food and Beverage | No dispute reported | Delay: No Change: UNCHANGED | 06/30/2026 | 1049545431 | CMS |
| Novartis Pharmaceuticals Corporation | $0.96 | 08/02/2023 | Food and Beverage | No dispute reported | Delay: No Change: UNCHANGED | 06/30/2026 | 992112437 | CMS |
| Novartis Pharmaceuticals Corporation | $26.96 | 08/02/2023 | Food and Beverage | No dispute reported | Delay: No Change: UNCHANGED | 06/30/2026 | 992112443 | CMS |
| Novartis Pharmaceuticals Corporation | $27.92 | 07/26/2023 | Food and Beverage | No dispute reported | Delay: No Change: UNCHANGED | 06/30/2026 | 992112433 | CMS |
| E.R. Squibb & Sons, L.L.C. | $30.91 | 07/25/2023 | Food and Beverage | No dispute reported | Delay: No Change: UNCHANGED | 06/30/2026 | 1015406999 | CMS |
| E.R. Squibb & Sons, L.L.C. | $33.87 | 07/19/2023 | Food and Beverage | No dispute reported | Delay: No Change: UNCHANGED | 06/30/2026 | 1015406983 | CMS |
| AstraZeneca Pharmaceuticals LP | $24.28 | 07/13/2023 | Food and Beverage | No dispute reported | Delay: No Change: UNCHANGED | 06/30/2026 | 1015656829 | CMS |
| E.R. Squibb & Sons, L.L.C. | $6.16 | 07/11/2023 | Food and Beverage | No dispute reported | Delay: No Change: UNCHANGED | 06/30/2026 | 1015406975 | CMS |
| ImmunoGen, Inc. | $22.58 | 07/06/2023 | Food and Beverage | No dispute reported | Delay: No Change: UNCHANGED | 06/30/2026 | 1017247151 | CMS |
By program year
All program years on this page · sorted by year
Source & provenance
- Dataset
- CMS Open Payments — General Payments
- Publisher of source data
- Centers for Medicare & Medicaid Services
- CMS publication date
- 2026-06-30
- Program years on this page
- 2019, 2022, 2023, 2024, 2025
Source files and profile matching
- Generated from
- OP_DTL_GNRL_PGYR2025_P06302026_06032026.csv
One page per canonical provider; split Profile_IDs are merged via Associated_Covered_Recipient_Profile_ID_1/_2 from the Covered Recipient Profile Supplement.
Corrections to the substance of a record route to CMS through its review-and-dispute process; errors in how this site mirrors or displays a record route to us. Both paths are described in Methodology & Data.