Celestine Wanjalla, MD
Infectious Disease · Nashville, TNNPI 1255674594
Payments from drug & device makers
What this record shows
This record is dominated by consulting fees: $15,405 of the $23,896 with a category attached, or 64.5%. Viiv Healthcare Company accounts for 65.2% of it on its own, with 2 other manufacturers making up the rest. Reporting peaked in 2024 at $8,067 and has fallen 99.3% since, to $59 in 2025. Among infectious disease clinicians in TN with any reported payments, this total sits in the top 10% — high for the specialty, which is a reason to read the composition above rather than the number alone.
Across 25 payments — averaging $955.82 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Viiv Healthcare Company$16K
- Gilead$8K
- Corcept Therapeutics$59
Across 2 payments — averaging $90,000 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.
- Gilead$180K
What the payments were for
- Consulting fees$15,40564%
- Speaking & faculty fees$6,54527%
- Travel & lodging$1,1245%
- Food & beverage$8153%
- Education$70%
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 |
|---|---|---|
| Viiv Healthcare Company | 10 | $15,576 |
| Gilead | 14 | $8,261 |
| Corcept Therapeutics | 1 | $59 |
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
$23,896 in reported general payments places this provider in the 90th percentile of 156 infectious disease providers in Tennessee.
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 |
|---|---|---|
| BiktarvyBictegrav/Emtricit/Tenofov Ala | 55 | $220,568 |
| TivicayDolutegravir Sodium | 50 | $136,924 |
| TriumeqAbacavir/Dolutegravir/Lamivudi | 26 | $102,823 |
| PrezcobixDarunavir/Cobicistat | 31 | $73,339 |
| DescovyEmtricitabine/Tenofov Alafenam | 27 | $59,008 |
| DovatoDolutegravir Sodium/Lamivudine | 20 | $57,185 |
| GenvoyaElviteg/Cob/Emtri/Tenof Alafen | 13 | $48,208 |
| JulucaDolutegravir/Rilpivirine | 12 | $42,367 |
| PifeltroDoravirine | 22 | $38,762 |
| Sulfamethoxazole-TrimethoprimSulfamethoxazole/Trimethoprim | 16 | $337 |
| Omeprazole | 28 | $332 |
| Atorvastatin Calcium | 70 | $281 |
| Trazodone Hcl | 18 | $272 |
| Nifedipine ErNifedipine | 19 | $227 |
| Pregabalin | 24 | $221 |
Paid to pharmacies, not to this prescriber.
Companies that both paid and supply prescribed drugs
These companies both reported payments to this provider and make drugs the provider prescribed under Medicare Part D in 2024. For most specialties this overlap is expected — a cardiologist who is paid by a cardiology drugmaker also treats heart disease. It is shown so the reader can see it, not because it implies anything on its own.
| Company | Paid to this provider | Part D cost of their drugs |
|---|---|---|
| Viiv Healthcare CompanyTivicay, Triumeq, Dovato, Juluca | $15,576 | $339,300108 claims |
| GileadBiktarvy, Descovy, Genvoya | $8,261 | $327,78395 claims |
Reading this fairly. The Part D column is what drug plans and patients paid pharmacies — this provider received none of it, and it reflects how many patients they treat and what those drugs cost. Against peers, this provider's reported payments sit in the 90th percentile of 156 infectious disease providers in Tennessee.
Other infectious disease in Nashville
- John KoetheNashville$91K
- Elizabeth PhillipsNashville$71K
- Kassem BourgiNashville$34K
- Sean KellyNashville$17K
- David AronoffNashville$17K
- William SchaffnerNashville$16K
- Juli HortonNashville$14K
- Maricar MalinisNashville$14K
- Paul BryantNashville$12K
- Christina FiskeNashville$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.