DR. CATHY NIEMAN (MD) – Internal Medicine Physician, NPI 1578556171
Internal Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
1,476 INTERNAL MEDICINE in OK
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Provider Addresses for DR. CATHY NIEMAN (MD)
821, South Walnut Street, Downtown Stillwater, Stillwater, Payne County, Oklahoma, 74074, United States
STILLWATER, OK 740744226
Phone: (405) 372-4646
Fax: (405) 372-4685
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 4 Open Payments records for all available years, with a total value of $109.
Total Amount is formed as General ($109) + Research ($0) + Ownership ($0) = $109.
Last reported payment date: 2024-01-25 • Largest payer in this snapshot: ABBVIE INC. ($69).
Total Amount
$109
General + Research + Ownership
Payments
4
Total payment records
General Amount
$109
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-01-25
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| ABBVIE INC. | $69 |
| Astellas Pharma US Inc | $23 |
| GlaxoSmithKline, LLC. | $16 |
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: 2006-10-18
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 |
|---|---|---|---|---|
| I20061018000694 | I | Internal Medicine | OK | 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 |
|---|---|---|---|---|
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 986 | 365 | $0 |
| G0439 | Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 285 | 285 | $0 |
| 93010 | Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | 192 | 161 | $0 |
| 99490 | Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month | 160 | 20 | $0 |
| G0008 | Administration of influenza virus vaccine | 137 | 135 | $0 |
Insurance plans in this area (ZIP 74074)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| INTERNAL MEDICINE | OK | 90670 | Pneumococcal vaccine for injection into muscle | 26 | 26 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| - | OK | |
| - | OK | |
| O B S T E T R I C S/ G Y N E C O L O G Y | OK | |
| - | OK | |
| Physician Assistant | OK | |
| - | OK | |
| - | OK | |
| Internal Medicine | OK | |
| - | FL | |
| Physician Assistant | OK |
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