Tanaz Kahen, MD
Obstetrics & Gynecology · Tarzana, CANPI 1679542898
Payments from drug & device makers
What this record shows
This record is dominated by consulting fees: $10,600 of the $16,609 with a category attached, or 63.8%. Mimedx Group, Inc. accounts for 64.0% of it on its own, with 28 other manufacturers making up the rest. 2025 is the largest year on record at $7,014, 9.5 times the $735 reported in 2019. Among obstetrics & gynecology clinicians in CA with any reported payments, this total sits in the top 5% — high for the specialty, which is a reason to read the composition above rather than the number alone.
Across 400 payments — averaging $41.52 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Mimedx Group, Inc.$11K
- AbbVie$2K
- Pfizer$586
- Mayne Pharma Commercial LLC$582
- Hologic Sales And Service, LLC$436
- Myovant Sciences Inc.$296
- plus $2K from 23 others
What the payments were for
- Consulting fees$10,60064%
- Food & beverage$5,94236%
- Education$670%
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 |
|---|---|---|
| Mimedx Group, Inc. | 22 | $10,624 |
| AbbVie(2 entities) | 171 | $2,019 |
| Pfizer | 40 | $586 |
| Mayne Pharma Commercial LLC | 32 | $582 |
| Hologic Sales And Service, LLC | 11 | $436 |
| Myovant Sciences Inc. | 20 | $296 |
| Exeltis, USA Inc. | 14 | $281 |
| Sumitomo Pharma America, Inc. | 15 | $274 |
| Therapeuticsmd, Inc. | 14 | $268 |
| Evofem Biosciences, Inc. | 14 | $224 |
| Organon | 1 | $122 |
| Coopersurgical, Inc. | 2 | $119 |
| Avion Pharmaceuticals | 15 | $114 |
| Sage Therapeutics, LLC | 3 | $90 |
| Lupin Inc. | 5 | $80 |
| AMAG Pharmaceuticals, Inc. | 3 | $67 |
| Myriad Women's Health, Inc. | 2 | $67 |
| Millicent US Inc | 3 | $66 |
| Bayer | 2 | $43 |
| Lucid Diagnostics Inc. | 2 | $35 |
| Astellas Pharma US Inc | 1 | $34 |
| BD | 1 | $33 |
| Exact Sciences | 1 | $24 |
| Duchesnay USA Incorporated | 1 | $24 |
| Biohaven Pharmaceutical Holding Company Ltd. | 1 | $22 |
| Biohaven Pharmaceuticals, Inc. | 1 | $21 |
| Roche Diagnostics Corporation | 1 | $20 |
| Agile Therapeutics, Inc. | 1 | $19 |
| Boston Scientific | 1 | $18 |
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.
- BOVINE COLLAGEN$1,800
- ACESSA PROVU SYSTEM$120
- Aptima$118
- Orilissa$115
How this compares
$16,609 in reported general payments places this provider in the 95th percentile of 3,784 obstetrics & gynecology providers in California.
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 |
|---|---|---|
| PremproEstrogen,con/M-Progest Acet | 22 | $11,660 |
| PremarinEstrogens, Conjugated | 20 | $7,596 |
| Estradiol | 108 | $6,225 |
| Vivelle-DotEstradiol | 13 | $3,208 |
| Estradiol (Twice Weekly)Estradiol | 12 | $1,066 |
| ProgesteroneProgesterone, Micronized | 13 | $338 |
| Metronidazole | 12 | $271 |
| Clobetasol Propionate | 13 | $236 |
| Clotrimazole-BetamethasoneClotrimazole/Betamethasone Dip | 13 | $185 |
| Nitrofurantoin Mono-MacroNitrofurantoin Monohyd/M-Cryst | 14 | $92 |
| Fluconazole | 17 | $92 |
| Escitalopram Oxalate | 15 | $54 |
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 |
|---|---|---|
| PfizerPrempro, Premarin | $586 | $19,25542 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 95th percentile of 3,784 obstetrics & gynecology providers in California.
Other obstetrics & gynecology in Tarzana
- Steve YuNorthridge$964K
- Samir HageRedlands$640K
- Malcolm MunroLos Angeles$609K
- Michael KrychmanCosta Mesa$547K
- Anita NelsonTorrance$530K
- Jan SegnitzSan Jose$511K
- Risa KaganBerkeley$497K
- Michael GreenOxnard$424K
- Howard SalvaySanta Cruz$421K
- Marc WinterLaguna Hills$399K
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.