FREDERICK SIMON ISAAK (M.D.) – Emergency Medicine Physician, NPI 1639129281
Emergency Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
1,656 FAMILY PRACTICE in IA
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Provider Addresses for FREDERICK SIMON ISAAK (M.D.)
Medical Associates Clinic, 1500, Associates Drive, Dubuque, Dubuque County, Iowa, 52002, United States
DUBUQUE, IA 520022201
Phone: (563) 584-4100
Fax: (563) 584-4110
Type: Mailing
Medical Associates Clinic, 1000, Langworthy Street, Dubuque, Dubuque County, Iowa, 52001, United States
DUBUQUE, IA 520017313
Phone: (563) 584-3455
Fax: (563) 584-3177
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 1 Open Payments records for all available years, with a total value of $14.
Total Amount is formed as General ($14) + Research ($0) + Ownership ($0) = $14.
Last reported payment date: 2024-05-16 • Largest payer in this snapshot: PFIZER INC. ($14).
Total Amount
$14
General + Research + Ownership
Payments
1
Total payment records
General Amount
$14
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-05-16
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| PFIZER INC. | $14 |
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: 2010-03-18
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 |
|---|---|---|---|---|
| I20100318000844 | I | Family Practice | IA | 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 | 43 | 43 | $0 |
| 0240U | Respiratory infectious agent detection by rna for severe acute respiratory syndrome coronavirus 2 (covid-19), influenza a, and influenza b) in upper respiratory specimen, each reported as detected or not detected | 11 | 11 | $0 |
Insurance plans in this area (ZIP 52002)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Physician Assistant | IA | |
| - | IA | |
| D E R M A T O L O G Y | WI | |
| Physical Medicine And Rehabilitation | IA | |
| - | IA | |
| Certified Registered Nurse Anesthetist (Crna) | IA | |
| Nurse Practitioner | IA | |
| - | IA | |
| Physician Assistant | IA | |
| Physical Therapist In Private Practice | IA |
Reviews
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