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

MARGARITA S SYMONIAN SILVER

Allopathic & Osteopathic Physicians Internal Medicine Nephrology

NPI
1528140696
CMS profile
520719
Location
LOS ANGELES, CA

General Payments · PY2018–2024

$1,770.03

  • Reported across 74 records
  • CMS publication 2026-01-23

Latest program year · PY2024

$561.87

24 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

PY2024 · sorted by reported total

Nature of paymentAmountRecords
Food and Beverage $561.87 24

By paying entity

PY2024 · sorted by reported total

Paying entityAmountRecords
AKEBIA THERAPEUTICS INC $164.61 6
Ardelyx, Inc. $134.45 9
GENZYME CORPORATION $120.85 1
Amgen Inc. $49.23 2
Acerta Pharma LLC $49.21 3
Fresenius USA Marketing, Inc. $28.93 2
ANI Pharmaceuticals, Inc. $14.59 1

By program year

All program years on this page · sorted by year

Program yearAmountRecords
PY2018 $162.76 5
PY2019 $218.86 5
PY2020 $40.20 2
PY2021 $175.01 10
PY2022 $245.83 10
PY2023 $365.50 18
PY2024 $561.87 24

Payment records · PY2024 (24)

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

Program year 2024 201820192020202120222023 Record-level detail is published for PY2024; earlier years are summarised in “By program year”.
Paying entity Amount Date Nature of payment Dispute status Published Record ID Source
AKEBIA THERAPEUTICS INC $28.78 01/09/2024 Food and Beverage Undisputed 01/23/2026 1145824824 CMS
AKEBIA THERAPEUTICS INC $27.24 04/16/2024 Food and Beverage Undisputed 01/23/2026 1145824826 CMS
AKEBIA THERAPEUTICS INC $22.62 06/11/2024 Food and Beverage Undisputed 01/23/2026 1145824828 CMS
AKEBIA THERAPEUTICS INC $26.50 07/16/2024 Food and Beverage Undisputed 01/23/2026 1145828522 CMS
AKEBIA THERAPEUTICS INC $29.65 08/06/2024 Food and Beverage Undisputed 01/23/2026 1145828954 CMS
AKEBIA THERAPEUTICS INC $29.82 09/03/2024 Food and Beverage Undisputed 01/23/2026 1145830095 CMS
Amgen Inc. $15.15 09/26/2024 Food and Beverage Undisputed 01/23/2026 1111720207 CMS
Amgen Inc. $34.08 12/10/2024 Food and Beverage Undisputed 01/23/2026 1111720209 CMS
ANI Pharmaceuticals, Inc. $14.59 07/02/2024 Food and Beverage Undisputed 01/23/2026 1091139556 CMS
Ardelyx, Inc. $5.32 01/23/2024 Food and Beverage Undisputed 01/23/2026 1146710303 CMS
Ardelyx, Inc. $16.40 01/23/2024 Food and Beverage Undisputed 01/23/2026 1146710305 CMS
Ardelyx, Inc. $3.95 02/20/2024 Food and Beverage Undisputed 01/23/2026 1146710307 CMS
Ardelyx, Inc. $20.12 02/20/2024 Food and Beverage Undisputed 01/23/2026 1146710309 CMS
Ardelyx, Inc. $3.12 02/20/2024 Food and Beverage Undisputed 01/23/2026 1146710311 CMS
Ardelyx, Inc. $29.30 07/02/2024 Food and Beverage Undisputed 01/23/2026 1146710313 CMS
Ardelyx, Inc. $1.25 08/13/2024 Food and Beverage Undisputed 01/23/2026 1146710315 CMS
Ardelyx, Inc. $25.41 08/14/2024 Food and Beverage Undisputed 01/23/2026 1146710317 CMS
Ardelyx, Inc. $29.58 10/22/2024 Food and Beverage Undisputed 01/23/2026 1146710319 CMS
AstraZeneca Pharmaceuticals LP $14.58 01/16/2024 Food and Beverage Undisputed 01/23/2026 1104746737 CMS
AstraZeneca Pharmaceuticals LP $19.35 06/11/2024 Food and Beverage Undisputed 01/23/2026 1104249389 CMS
AstraZeneca Pharmaceuticals LP $15.28 08/13/2024 Food and Beverage Undisputed 01/23/2026 1105658588 CMS
Fresenius USA Marketing, Inc. $14.65 07/09/2024 Food and Beverage Undisputed 01/23/2026 1154195574 CMS
Fresenius USA Marketing, Inc. $14.28 07/30/2024 Food and Beverage Undisputed 01/23/2026 1154195572 CMS
GENZYME CORPORATION $120.85 10/16/2024 Food and Beverage Undisputed 01/23/2026 1139716424 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, 2024
Source files
Dataset page · Bulk file · PY2018 , PY2019 , PY2020 , PY2021 , PY2022 , PY2023 , PY2024
Generated from
OP_DTL_GNRL_PGYR2024_P01232026_01102026.csv

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