JAN K. SIEBERSMA (M.D.) – Obstetrics & Gynecology Physician, NPI 1952303216
Obstetrics & Gynecology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
74 OBSTETRICS/GYNECOLOGY in WY
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Provider Addresses for JAN K. SIEBERSMA (M.D.)
Lander Medical Clinic, 745, Buena Vista Drive, Lander, Fremont County, Wyoming, 82520, United States
LANDER, WY 825203431
Phone: (307) 332-2941
Fax: (307) 332-1920
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 2 Open Payments records for all available years, with a total value of $42.
Total Amount is formed as General ($42) + Research ($0) + Ownership ($0) = $42.
Last reported payment date: 2023-04-11 • Largest payer in this snapshot: Astellas Pharma US Inc ($24).
Total Amount
$42
General + Research + Ownership
Payments
2
Total payment records
General Amount
$42
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2023-04-11
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Astellas Pharma US Inc | $24 |
| GlaxoSmithKline, LLC. | $18 |
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: 2009-05-01
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 |
|---|---|---|---|---|
| I20090501000150 | I | Obstetrics/Gynecology | WY | 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 | 119 | 59 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 43 | 40 | $0 |
| 81001 | Manual urinalysis test with examination using microscope, automated | 31 | 24 | $0 |
Insurance plans in this area (ZIP 82520)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Nurse Practitioner | WY | |
| Family Practice | WY | |
| Physician Assistant | ID | |
| Nurse Practitioner | WY | |
| - | WY | |
| Internal Medicine | WY | |
| Family Practice | WY | |
| Clinical Psychologist | WY | |
| Family Practice, Pediatric Medicine | WY | |
| Physician Assistant | ME |
Reviews
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