Healthcare provider profile · identity verified

Barbara Susan Giesser, MD

Allopathic & Osteopathic Physicians|Psychiatry & Neurology|Neurology · SANTA MONICA, CA · NPI 1235154055

Profile state: payments and partd Open Payments: 2025 Medicare Part D: 2024 Last identity check: 2026-08-10 Page data build: 2026-08-12

Verified facts

What the public records show

CMS Open Payments records show Barbara Susan Giesser, MD received $385.13 in general payments during 2025 across 10 reported records.

Biogen, Inc. accounted for 39.0% of that reported general-payment amount.

The Open Payments records used for this analysis explicitly named 7 associated products.

Cycle Pharmaceuticals Inc reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported Bafiertam as an associated drug or biological on 1343 records involving 850 distinct recipient NPIs. Public Medicare Part D data also shows 18 claims for Bafiertam by this doctor in 2024.

Genentech USA, Inc. reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported Enspryng as an associated drug or biological on 186 records involving 143 distinct recipient NPIs. Public Medicare Part D data also shows 12 claims for Enspryng by this doctor in 2024.

These records do not establish that a payment influenced prescribing or medical care.

Payment overview · 2025

General Payments

$385.13

10 reported records · 8 companies

Separate record types

Research & Ownership

Research Payments (direct recipient): not present in the loaded data

Associated Research Funding (for example, named PI): not present in the loaded data

Ownership / Investment: not present in the loaded data

These categories are never added into the General Payments headline. Associated research funding must not be described as money the doctor personally received unless the source record supports that conclusion.

Who paid this doctor?

Companies in 2025 General Payments

Reported companyCanonical companyAmountShareRecordsYear
Biogen, Inc. Unresolved — no canonical attribution shown $150.0039.0%12025
Genentech USA, Inc. Unresolved — no canonical attribution shown $70.0018.2%22025
Amgen Inc. Unresolved — no canonical attribution shown $57.2614.9%22025
Ascendis Pharma Endocrinology Inc Unresolved — no canonical attribution shown $25.696.7%12025
Caris MPI, Inc. Unresolved — no canonical attribution shown $23.896.2%12025
Cycle Pharmaceuticals Inc Unresolved — no canonical attribution shown $22.395.8%12025
Lilly USA, LLC Unresolved — no canonical attribution shown $19.715.1%12025
GENZYME CORPORATION Unresolved — no canonical attribution shown $16.194.2%12025

What were the payments for?

Payment categories

CategoryAmountRecords
Food and Beverage$177.877
Consulting Fee$150.001
Education$57.262

A meal, consulting fee, royalty, and travel payment describe different kinds of reported relationships and should not be interpreted as equivalent.

Analysis 1 · Payment-linked products

Products named in Open Payments records

Reported productTypeReported companyRelated amount*RecordsYear
TYSABRI
Normalized: tysabri
Biological Biogen, Inc. $150.00 1 2025
Source payment records
Ocrevus Zunovo
Normalized: ocrevus zunovo
Biological Genentech USA, Inc. $70.00 2 2025
Source payment records
UPLIZNA
Normalized: uplizna
Biological Amgen Inc. $57.26 2 2025
Source payment records
Yorvipath
Normalized: yorvipath
Drug Ascendis Pharma Endocrinology Inc $25.69 1 2025
Source payment records
MI CANCER SEEK
Normalized: mi cancer seek
Device Caris MPI, Inc. $23.89 1 2025
Source payment records
Tascenso ODT
Normalized: tascenso odt
Drug Cycle Pharmaceuticals Inc $22.39 1 2025
Source payment records
ZEPBOUND
Normalized: zepbound
Drug Lilly USA, LLC $19.71 1 2025
Source payment records

* Product-associated amounts are non-additive because one payment record may name more than one product.

These products were named on specific Open Payments records. A named product does not show that the payment influenced treatment or prescribing.

Public prescribing for products named in payments

No exact normalized or approved-alias overlap was found in the loaded Part D year. This does not mean the doctor never prescribed the product.

The presence of the same drug in both datasets does not show that a payment caused or influenced a prescription.

Analysis 2 · Same-company prescribing overlap

Drugs reported in other payments from the same company that also appear in Medicare Part D

This analysis is independent from products named on this doctor’s individual payment records. A row appears only when the exact Open Payments reporting entity paid this doctor, that same reporting entity reported the drug or biological on at least 10 loaded General Payment records involving at least 2 distinct recipient NPIs, and this doctor has the same non-generic brand in public Part D data. This does not mean the company owns or manufactures the drug.

Paying companyPayment yearDrug reported by same entityOpen Payments evidencePart DClaimsBeneficiaries
Cycle Pharmaceuticals Inc
Exact reporting entity; no affiliate inference
2025 Bafiertam
open payments reported associated product
CMS Open Payments — General Payments
1343 supporting records · 850 recipient NPIs · example record 1248898758
Bafiertam · 2024
Exact normalized brand match · 1 Part D row
18 suppressed by CMS
Genentech USA, Inc.
Exact reporting entity; no affiliate inference
2025 Enspryng
open payments reported associated product
CMS Open Payments — General Payments
186 supporting records · 143 recipient NPIs · example record 1211488510
Enspryng · 2024
Exact normalized brand match · 1 Part D row
12 suppressed by CMS

These facts do not show that a payment was for the drug, that the company owns or manufactures the drug, or that a payment caused or influenced prescribing.

Public Medicare Part D data

Provider-and-drug rows loaded for 2024

BrandGenericClaimsBeneficiaries
BaclofenBaclofen14749
GabapentinGabapentin12925
Kesimpta PenOfatumumab11113
Dalfampridine ErDalfampridine8212
Tizanidine HclTizanidine Hcl42suppressed
TeriflunomideTeriflunomide41suppressed
ClonazepamClonazepam26suppressed
Dimethyl FumarateDimethyl Fumarate22suppressed
ModafinilModafinil21suppressed
CopaxoneGlatiramer Acetate20suppressed
AubagioTeriflunomide19suppressed
BafiertamMonomethyl Fumarate18suppressed
GlatopaGlatiramer Acetate16suppressed
RebifInterferon Beta-1a/Albumin13suppressed
Tramadol HclTramadol Hcl13suppressed
EnspryngSatralizumab-Mwge12suppressed
Duloxetine HclDuloxetine Hcl11suppressed
MethylprednisoloneMethylprednisolone11suppressed
Sumatriptan SuccinateSumatriptan Succinate11suppressed

Timeline

Payment and prescribing data by year

Open Payments and Medicare Part D may refer to different years. They are shown separately rather than aligned as if they describe the same period.

YearGeneral PaymentsMain payerExplicit productsCompany overlapsPart D coverage
2025 $385.13 · 10 records Biogen, Inc. MI CANCER SEEK, Ocrevus Zunovo, TYSABRI, Tascenso ODT, UPLIZNA, Yorvipath, ZEPBOUND 2
2024 Complete

Questions to ask

Questions you could discuss with your doctor

These are general questions generated from reviewed templates. They are not personalized medical advice.

Sources and limitations

How to read this page

Loaded source releases

DatasetYearPublicationSource
CMS Open Payments — General Payments 2025 2026-06-30 Original source
Medicare Part D Prescribers by Provider and Drug 2024 2026-05-06 Original source
NPPES Data Dissemination V2 current / reference data 2026-08-10 Original source

Methodology version: 2.1

Editorial template version: 2.4

Product contract version: 2.0

Schema version: 0.7.0

Page data build: 2026-08-12T23:34:59.370714+00:00

Publication policy: eligible for indexing after public-launch controls are enabled

Full methodology · Questions & answers · Report a possible error