Obstetrics & Gynecology · San Diego, CA
NPI
1679517239
Since 2006
Specialty
Obstetrics & Gynecology
Code 207V00000X
Group practices
1
Medicare group memberships
Hospitals
1
Hospital affiliations
11939 Rancho Bernardo Rd, Suite 110
San Diego, CA, 92128
Phone (858) 613-8949
Groups this clinician bills Medicare through
Medicare paid, 2024
$29K
386 services
Medicare patients, 2024
163
Average age 74
Drug cost, 2024
$53K
578 prescriptions
Company payments, 2025
$1,118
From 6 companies
Procedures and visits billed to Original Medicare, 2024
In 2024, the most common Medicare service billed by Karen Kohatsu was code 99213 (office e&m - established), 131 times for 93 patients. In total Karen Kohatsu billed 386 services in 25 codes, and Medicare paid $29K.
| Code |
|---|
Official US government data: the national provider registry and Medicare enrollment records, linked by NPI. Last update of this record: 2008-06-13.
| Setting |
|---|
| Services |
|---|
| Patients |
|---|
| Paid per service |
|---|
| Medicare paid |
|---|
| 99213 Office E&M - Established | Office | 131 | 93 | $63.74 | $8,350 |
| 82270 Immunoassay | Office | 52 | 52 | $4.29 | $223 |
| G0101 Cervical or vaginal cancer screening; pelvic and clinical breast examination | Office | 44 | 44 | $39.60 | $1,742 |
| Q0091 Screening papanicolaou smear; obtaining, preparing and conveyance of cervical or vaginal smear to laboratory | Office | 39 | 39 | $46.33 | $1,807 |
| 57160 Other Organ Systems | Office | 27 | 17 | $45.46 | $1,227 |
| 99203 Office E&M - New | Office | 26 | 26 | $61.00 | $1,586 |
| 99214 Office E&M - Established | Office | 12 | 12 | $103.63 | $1,244 |
By year: 2022 $42K for 577 services; 2023 $42K for 652 services; 2024 $29K for 386 services.
Lab tests billed to Medicare, 2024
| Test code | Tests | Patients | Paid per test | Medicare paid |
|---|---|---|---|---|
| 82270 Immunoassay | 52 | 52 | $4.29 | $223 |
Medicare prescription drug claims, 2024
In 2024, the drug Karen Kohatsu prescribed most often to Medicare patients was Progesterone (Progesterone, Micronized), with 73 prescriptions and refills. In total Karen Kohatsu wrote 578 Medicare prescriptions that cost $53K.
| Drug | Claims | 30-day fills | Patients | Cost |
|---|---|---|---|---|
| Progesterone Progesterone, Micronized | 73 | 189 | 25 | $4,221 |
| Estradiol Generic | 67 | 191 | 32 | $2,158 |
| Nitrofurantoin Mono-Macro Nitrofurantoin Monohyd/M-Cryst | 35 | 59 | 24 | $1,259 |
| Estradiol (Twice Weekly) Estradiol | 30 | 71 | 11 | $3,805 |
| Nystatin Generic | 28 | 36 | 16 | $321 |
| Triamcinolone Acetonide Generic | 26 | 36 | 14 | $116 |
| Ciprofloxacin Hcl Generic | 25 | 25 | 18 | $64.63 |
| Fluconazole Generic | 22 | 25 | 13 | $158 |
| Cephalexin Generic | 19 | 29 | 14 | $151 |
| Combipatch Estradiol/Norethindrone Acet | 17 | 22 | Under 11 | $5,273 |
| Metformin Hcl Generic | 17 | 30 | Under 11 | $143 |
| Acyclovir Generic | 16 | 38 | Under 11 | $185 |
| Clobetasol Propionate Generic | 14 | 20 | 12 | $843 |
| Medroxyprogesterone Acetate Generic | 14 | 26 | Under 11 | $138 |
| Nystatin-Triamcinolone Nystatin/Triamcinolone Acet | 14 | 16 | Under 11 | $498 |
Brand drugs: - claims; generic drugs: 496 claims.
Money and other things of value reported by the companies
In 2025, drug and medical device companies paid Karen Kohatsu $1,118 ($1,118 in general payments such as food, travel and fees) from 6 companies. The largest payer was Mayne Pharma Commercial LLC with $656.
Official US government data on Original Medicare services, Medicare prescription drug plans and the payments drug and device companies must report. Services with fewer than 11 patients and drugs with fewer than 11 claims are not published. Procedure codes are shown by number with their public category.