Doctor profile · Federal record
Dr. Frederick Isaak, M.D.
Emergency Medicine Physician (CMS: Family Practice) · Occupational Medicine Physician · Dubuque, IA
- NPI 1639129281
- Accepts Medicare
- 40 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
1000 Langworthy St
Dubuque, IA 520017313
(563) 584-3455
fax (563) 584-3177 - Mailing address
-
1500 Associates Dr
Dubuque, IA 520022201
Credentials & registration
- NPI registered
- May 2006 — 20 yrs on file
- Profile last updated
- April 11, 2008
- Year of graduation
- 1986 — 40 yrs since
- Specialty taxonomy
- 207P00000X — NUCC code
- State license (1)
- Iowa #28293
- Medicaid
- IA #0189407
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1639129281. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
54
Distinct HCPCS
2
Medicare allowed
$5,146
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 43 | 43 | $84 | |
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 | $140 |
In context: peer comparison
Among 3 peers in Dubuque Emergency Medicine Physician, average services per provider: 99. This provider delivers 0.5× the peer median.Open Payments
Industry payments received
All-time total
$14
Transactions
1
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Pfizer INC. | 1 | $14.40 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
101
Patients
99
Total drug cost
$1,098
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Prednisone | Generic | 26 | 26 | $90 |
| Methylprednisolone | Generic | 25 | 23 | $197 |
| Azithromycin | Generic | 15 | 15 | $86 |
| Cephalexin | Generic | 13 | 13 | $116 |
| Albuterol Sulfate Hfa (Albuterol Sulfate) | Brand | 11 | 11 | $460 |
| Amoxicillin-Clavulanate Potass (Amoxicillin/Potassium Clav) | Brand | 11 | 11 | $150 |
Frequently asked questions
What is Dr. Frederick Isaak's medical specialty?
Dr. Frederick Isaak practices Emergency Medicine Physician in Dubuque, IA.
Where does Dr. Frederick Isaak practice?
Dr. Frederick Isaak practices at 1000 Langworthy St, Dubuque, IA 520017313. Office phone: 5635843455.
What is Dr. Frederick Isaak's NPI?
Dr. Frederick Isaak's National Provider Identifier (NPI) is 1639129281, issued by NPPES.
Does Dr. Frederick Isaak accept Medicare assignment?
Yes. Dr. Frederick Isaak accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Frederick Isaak commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99213); 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 (HCPCS 0240U). Source: CMS Medicare Physician & Other Practitioners file.