Official source Data mirrored from Centers for Medicare & Medicaid Services Open Payments · General Payments · as published 2026-01-23 View official record Methodology

Covered recipient · General Payments record

PHILIP L CHATHAM

Allopathic & Osteopathic Physicians Internal Medicine Medical Oncology

NPI
1740279264
CMS profile
305462
Location
SAN GABRIEL, CA

General Payments · PY2018–2023

$4,685.48

  • Reported across 184 records
  • CMS publication 2026-01-23

Latest program year · PY2023

$763.18

20 records · 0 disputed

Financial relationships do not necessarily indicate an improper relationship; the data is open to interpretation.

How these totals are calculated
  • The total is the sum of the General Payments records CMS published for the labeled program year(s), exactly as published. 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.
  • Featured-page threshold (a presentation gate, not a judgment): records>=3 OR total>=100 (all years).
  • Methodology & Data — sourcing, labeling, and limitations.

By nature of payment

PY2023 · sorted by reported total

Nature of paymentAmountRecords
Food and Beverage $379.09 16
Long term medical supply or device loan $299.10 3
Education $84.99 1

By paying entity

PY2023 · sorted by reported total

By program year

All program years on this page · sorted by year

Program yearAmountRecords
PY2018 $340.12 16
PY2019 $936.06 42
PY2020 $251.48 8
PY2021 $1,134.00 47
PY2022 $1,260.64 51
PY2023 $763.18 20

Payment records · PY2023 (20)

Sorted by paying entity, then date · as published by CMS

Program year 2023 20182019202020212022 Record-level detail is published for PY2023; earlier years are summarised in “By program year”.
Paying entity Amount Date Nature of payment Dispute status Published Record ID Source
Amgen Inc. $28.15 01/05/2023 Food and Beverage Undisputed 01/23/2026 1020655945 CMS
Amgen Inc. $19.00 02/16/2023 Food and Beverage Undisputed 01/23/2026 1020655947 CMS
AstraZeneca Pharmaceuticals LP $22.26 04/20/2023 Food and Beverage Undisputed 01/23/2026 1015958203 CMS
Blueprint Medicines Corporation $20.21 04/27/2023 Food and Beverage Undisputed 01/23/2026 1051261403 CMS
Daiichi Sankyo Inc. $24.21 01/19/2023 Food and Beverage Undisputed 01/23/2026 1006358709 CMS
E.R. Squibb & Sons, L.L.C. $29.66 01/26/2023 Food and Beverage Undisputed 01/23/2026 1015074535 CMS
E.R. Squibb & Sons, L.L.C. $23.01 02/22/2023 Food and Beverage Undisputed 01/23/2026 1015074575 CMS
E.R. Squibb & Sons, L.L.C. $28.13 04/12/2023 Food and Beverage Undisputed 01/23/2026 1015074623 CMS
Eisai Inc. $20.30 03/30/2023 Food and Beverage Undisputed 01/23/2026 1023327221 CMS
Eisai Inc. $21.09 04/12/2023 Food and Beverage Undisputed 01/23/2026 1023327223 CMS
Genentech USA, Inc. $28.25 04/14/2023 Food and Beverage Undisputed 01/23/2026 1040505449 CMS
Incyte Corporation $84.99 01/19/2023 Education Undisputed 01/23/2026 1044307697 CMS
Incyte Corporation $27.96 04/06/2023 Food and Beverage Undisputed 01/23/2026 1044307939 CMS
Novartis Pharmaceuticals Corporation $21.32 05/03/2023 Food and Beverage Undisputed 01/23/2026 991791855 CMS
Novartis Pharmaceuticals Corporation $14.32 09/20/2023 Food and Beverage Undisputed 01/23/2026 991791871 CMS
NOVARTIS PHARMACEUTICALS CORPORATION $99.70 01/14/2023 Long term medical supply or device loan Undisputed 01/23/2026 993435403 CMS
NOVARTIS PHARMACEUTICALS CORPORATION $99.70 02/15/2023 Long term medical supply or device loan Undisputed 01/23/2026 993435405 CMS
NOVARTIS PHARMACEUTICALS CORPORATION $99.70 05/31/2023 Long term medical supply or device loan Undisputed 01/23/2026 993435407 CMS
Seagen Inc. $24.56 01/19/2023 Food and Beverage Undisputed 01/23/2026 995737311 CMS
Seagen Inc. $26.66 03/10/2023 Food and Beverage Undisputed 01/23/2026 995737409 CMS

Source & provenance

Dataset
CMS Open Payments — General Payments
Publisher of source data
Centers for Medicare & Medicaid Services
CMS publication date
2026-01-23
Program years on this page
2018, 2019, 2020, 2021, 2022, 2023
Source files
Dataset page · Bulk file · PY2018 , PY2019 , PY2020 , PY2021 , PY2022 , PY2023
Generated from
OP_DTL_GNRL_PGYR2023_P01232026_01102026.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.