DIANA CATHERINE DIEMER (FNP) – Family Medicine Physician, NPI 1104313436
Family Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
8,106 NURSE PRACTITIONER in MI
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Provider Addresses for DIANA CATHERINE DIEMER (FNP)
304, West Green Street, Hastings, Barry County, Michigan, 49058, United States
HASTINGS, MI 490581725
Phone: (269) 948-8057
Fax: (269) 948-8964
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 175 Open Payments records for all available years, with a total value of $2,768.
Total Amount is formed as General ($2,768) + Research ($0) + Ownership ($0) = $2,768.
Last reported payment date: 2024-12-20 • Largest payer in this snapshot: ABBVIE INC. ($455).
Total Amount
$2,768
General + Research + Ownership
Payments
175
Total payment records
General Amount
$2,768
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-20
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| ABBVIE INC. | $455 |
| Novo Nordisk Inc | $360 |
| AstraZeneca Pharmaceuticals LP | $325 |
| PFIZER INC. | $224 |
| Lilly USA, LLC | $214 |
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: 2018-06-11
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 |
|---|---|---|---|---|
| I20180611000269 | I | Nurse Practitioner | MI | 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 | 11 | 11 | $0 |
| G0439 | Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 11 | 11 | $0 |
Insurance plans in this area (ZIP 49058)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Nurse Practitioner | MI | |
| - | MI | |
| Nurse Practitioner | MI | |
| Family Practice | MI | |
| Nurse Practitioner | MI |
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