Sigrid Williams, MD
Obstetrics & Gynecology · Tucson, AZNPI 1033485511
Payments from drug & device makers
What this record shows
Almost everything reported here is food and beverage — 100.0% of the total across 18 separate payments, which is the pattern of a clinician who attends manufacturer presentations rather than one with a consulting arrangement. It is spread thinly across 11 manufacturers, the largest accounting for just 19.8% — the pattern of someone who eats at a lot of different presentations. Reporting peaked in 2024 at $185 and has fallen 52.7% since, to $87 in 2025. That places this record below the midpoint for obstetrics & gynecology clinicians in AZ, where the typical reported total is $619.
Across 18 payments — averaging $19.88 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Astellas Pharma US Inc$71
- Coopersurgical, Inc.$52
- Merck$52
- Biogen$42
- Bayer$27
- Organon$22
- plus $91 from 5 others
Across 4 payments — averaging $24,727 each. Payments tied to a research study. These frequently flow through the physician to a hospital or research institution rather than to the physician personally.
- BD$82K
- Cue Health Inc.$16K
What the payments were for
- Food & beverage$358100%
Most of this is food and beverage — typically meals provided during product presentations at a clinic or hospital. Nationally that is the single largest category of reported payments by count.
General payments by program year
Who reported the general payments
Companies are grouped under their corporate parent — a single manufacturer often files under several CMS reporting entities. Research and ownership payments are counted separately and are not in this table.
| Company | Payments | Total |
|---|---|---|
| Astellas Pharma US Inc | 3 | $71 |
| Coopersurgical, Inc. | 1 | $52 |
| Merck | 3 | $52 |
| Biogen | 2 | $42 |
| Bayer | 1 | $27 |
| Organon | 2 | $22 |
| BD | 1 | $21 |
| Hologic Sales And Service, LLC | 1 | $20 |
| Aspira Women's Health Inc | 1 | $18 |
| Sumitomo Pharma America, Inc. | 1 | $16 |
| Mayne Pharma Commercial LLC | 2 | $16 |
How this compares
$358 in reported general payments places this provider in the 40th percentile of 757 obstetrics & gynecology providers in Arizona.
Medicare billing
What this is not: this is the amount Original Medicare Part B allowed for services this provider billed in 2024. It is not their income. It excludes Medicare Advantage — now more than half of all Medicare enrollment — along with Medicaid and all commercial insurance, and it is gross practice revenue before staff, rent, supplies and malpractice premiums. CMS also suppresses any figure covering ten or fewer patients, so low-volume providers appear smaller than they are.
Most prescribed under Part D
| Drug | Claims | Cost to plans & patients |
|---|---|---|
| Estradiol | 17 | $952 |
| Clobetasol Propionate | 11 | $426 |
Paid to pharmacies, not to this prescriber.
Other obstetrics & gynecology in Tucson
- Catherine BrainardTucson$302K
- Shruti BalaTucson$108K
- Lori HudsonTucson$88K
- Carol DehasseTucson$39K
- Arianna SholesTucson$21K
- Amy MitchellTucson$14K
- Snigdha ToodiTucson$11K
- Cameron KlinerTucson$10K
- Francisco GarciniTucson$9K
- Lilia SenTucson$9K
Where these figures come from
- Payments: CMS Open Payments, program years 2019–2025 (publication P06302026_06032026).
- Billing: Medicare Physician & Other Practitioners, data year 2024. Original Medicare Part B only.
- Identity: NPPES NPI Registry, July 2026.