MARK NISHIYAMA (MD) – Obstetrics & Gynecology Physician, NPI 1033279849
Obstetrics & Gynecology Physician
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Doctor Profile
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Profile Insights
NPPES metrics only — not quality of care.
1,037 OBSTETRICS/GYNECOLOGY in WA
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Provider Addresses for MARK NISHIYAMA (MD)
South Scheuber Road, Centralia, Lewis County, Washington, 98531-4320, United States
CENTRALIA, WA 985318877
Phone: (360) 330-8950
Fax: (360) 330-8955
Mailing address matches the actual address.
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 39 Open Payments records for all available years, with a total value of $872.
Total Amount is formed as General ($872) + Research ($0) + Ownership ($0) = $872.
Last reported payment date: 2024-12-09 • Largest payer in this snapshot: Exeltis, USA Inc. ($299).
Total Amount
$872
General + Research + Ownership
Payments
39
Total payment records
General Amount
$872
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-09
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Exeltis, USA Inc. | $299 |
| Sage Therapeutics, Inc. | $206 |
| Minerva Surgical, Inc | $206 |
| Hologic Sales and Service, LLC | $80 |
| PFIZER INC. | $28 |
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2009-04-20
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20090420000111 | I | Obstetrics/Gynecology | WA | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 66 | 41 | $0 |
| 99212 | Established patient office or other outpatient visit, 10-19 minutes | 53 | 26 | $0 |
| 99203 | New patient office or other outpatient visit, 30-44 minutes | 20 | 20 | $0 |
| G0101 | Cervical or vaginal cancer screening; pelvic and clinical breast examination | 19 | 19 | $0 |
| Q0091 | Screening papanicolaou smear; obtaining, preparing and conveyance of cervical or vaginal smear to laboratory | 12 | 12 | $0 |
Insurance plans in this area (ZIP 98531)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| H E M A T O L O G Y/ O N C O L O G Y | WA | |
| Gynecological Oncology, Obstetrics/Gynecology | CA | |
| - | OR | |
| Certified Nurse Midwife (Cnm) | WA | |
| O B S T E T R I C S/ G Y N E C O L O G Y | WA | |
| - | WA | |
| Physician Assistant | WA | |
| Mental Health Counselor | WA | |
| - | WA | |
| - | WA |
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