Dia Waguespack, MD
Nephrology · Houston, TXNPI 1932425006
Payments from drug & device makers
Across 99 payments — averaging $866.19 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Amgen$34K
- AstraZeneca$24K
- E.r. Squibb & Sons, L.L.C.$23K
- Travere Therapeutics, Inc.$4K
- Aurinia Pharma U.S., Inc.$310
- Novartis$147
- plus $289 from 5 others
What the payments were for
- Consulting fees$12,29632%
- Speaking & faculty fees$21,92356%
- Travel & lodging$2,9818%
- Food & beverage$1,6604%
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 |
|---|---|---|
| Amgen(2 entities) | 37 | $34,389 |
| AstraZeneca(2 entities) | 23 | $24,018 |
| E.r. Squibb & Sons, L.L.C. | 2 | $22,899 |
| Travere Therapeutics, Inc. | 14 | $3,700 |
| Aurinia Pharma U.S., Inc. | 12 | $310 |
| Novartis | 5 | $147 |
| Nxstage Medical, Inc. | 2 | $127 |
| GSK | 1 | $125 |
| Vifor Pharma, Inc. | 1 | $13 |
| Fresenius USA Marketing, Inc. | 1 | $13 |
| Otsuka America Pharmaceutical, Inc. | 1 | $12 |
What the payments were tied to
Products named in the reported payments. Only payments of $100 or more are attributed here — the typical reported payment nationally is a meal worth about $16, and listing those product-by-product would be noise.
How this compares
$85,752 in reported general payments places this provider in the 90th percentile of 1,070 nephrology providers in Texas.
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 |
|---|---|---|
| Tacrolimus | 11 | $8,195 |
| Sevelamer Carbonate | 12 | $4,166 |
| Nifedipine ErNifedipine | 35 | $1,191 |
| Bumetanide | 20 | $622 |
| Potassium Chloride | 14 | $367 |
| Gentamicin Sulfate | 13 | $335 |
| Losartan Potassium | 29 | $218 |
| Calcitriol | 16 | $215 |
| Carvedilol | 31 | $119 |
| Prednisone | 11 | $74 |
| Allopurinol | 18 | $46 |
| Lisinopril | 15 | $40 |
Paid to pharmacies, not to this prescriber.
Other nephrology in Houston
- Sreedhar MandayamHouston$7M
- Marializa BernardoHouston$4.2M
- Stephen FademHouston$2.4M
- Biruh WorkenehHouston$1.8M
- Rahul PandeyHouston$1.6M
- Christopher KwohHouston$928K
- George NassarHouston$772K
- June YaoHouston$651K
- Maher BisharaHouston$489K
- Wolfgang WinkelmayerHouston$462K
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.