Obstetrics & Gynecology · Centralia, WA
NPI
1033279849
Since 2006
Specialty
Obstetrics & Gynecology
Code 207V00000X
Group practices
1
Medicare group memberships
Hospitals
1
Hospital affiliations
1000 S Scheuber Rd
Centralia, WA, 98531
Phone (360) 330-8950
Groups this clinician bills Medicare through
Medicare paid, 2024
$13K
208 services
Medicare patients, 2024
80
Average age 70
Drug cost, 2024
$13K
257 prescriptions
Company payments, 2025
$104
From 6 companies
Procedures and visits billed to Original Medicare, 2024
In 2024, the most common Medicare service billed by Mark Nishiyama was code 99212 (office e&m - established), 54 times for 28 patients. In total Mark Nishiyama billed 208 services in 26 codes, and Medicare paid $13K.
| Code |
|---|
Official US government data: the national provider registry and Medicare enrollment records, linked by NPI. Last update of this record: 2021-06-23.
| Setting |
|---|
| Services |
|---|
| Patients |
|---|
| Paid per service |
|---|
| Medicare paid |
|---|
| 99212 Office E&M - Established | Office | 54 | 28 | $36.43 | $1,967 |
| 99213 Office E&M - Established | Office | 41 | 27 | $64.61 | $2,649 |
| 99203 Office E&M - New | Office | 17 | 17 | $70.81 | $1,204 |
| 81003 Clinical Chemistry | Office | 16 | 11 | $2.20 | $35.2 |
| 99214 Office E&M - Established | Office | 13 | 12 | $71.78 | $933 |
| Q0091 Screening papanicolaou smear; obtaining, preparing and conveyance of cervical or vaginal smear to laboratory | Office | 12 | 12 | $44.45 | $533 |
By year: 2022 $19K for 274 services; 2023 $15K for 246 services; 2024 $13K for 208 services.
Lab tests billed to Medicare, 2024
| Test code | Tests | Patients | Paid per test | Medicare paid |
|---|---|---|---|---|
| 81003 Clinical Chemistry | 16 | 11 | $2.20 | $35.2 |
Medicare prescription drug claims, 2024
In 2024, the drug Mark Nishiyama prescribed most often to Medicare patients was Estradiol, with 44 prescriptions and refills. In total Mark Nishiyama wrote 257 Medicare prescriptions that cost $13K.
| Drug | Claims | 30-day fills | Patients | Cost |
|---|---|---|---|---|
| Estradiol Generic | 44 | 108 | 17 | $3,544 |
| Jencycla Norethindrone | 22 | 22 | Under 11 | $188 |
| Misoprostol Generic | 21 | 21 | 18 | $36.31 |
| Progesterone Progesterone, Micronized | 20 | 22 | Under 11 | $242 |
| Clobetasol Propionate Generic | 12 | 12 | Under 11 | $151 |
| Premarin Estrogens, Conjugated | 12 | 40 | Under 11 | $5,163 |
| Acyclovir Generic | 11 | 15 | Under 11 | $38.15 |
Brand drugs: - claims; generic drugs: 231 claims.
Money and other things of value reported by the companies
In 2025, drug and medical device companies paid Mark Nishiyama $104 ($104 in general payments such as food, travel and fees) from 6 companies. The largest payer was OptumHealth Care Solutions, LLC with $21.7.
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.