Doctor profile · Federal record
Dr. Nikolas Diemer, OD
Optometrist · Freeport, IL
- NPI 1588766281
- MIPS 87.7 / 100 · 2023
- 20 yrs on file
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
1000 Kiwanis Dr
Freeport, IL 610326921
(815) 235-6177
fax (815) 235-6180
Credentials & registration
- NPI registered
- September 2006 — 20 yrs on file
- Profile last updated
- July 8, 2007
- Specialty taxonomy
- 152W00000X — NUCC code
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1588766281. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
4,127
Distinct HCPCS
9
Medicare allowed
$73,372
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
66984 |
Removal of cataract with insertion of prosthetic lens | 3,329 | 24 | $1 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 307 | 295 | $124 | |
92250 |
Photography of the retina | 185 | 180 | $35 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 113 | 81 | $88 | |
92133 |
Imaging of optic nerve | 50 | 44 | $35 | |
92134 |
Imaging of retina | 44 | 41 | $39 | |
92014 |
Established patient complete exam of visual system | 40 | 40 | $121 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 30 | 30 | $163 | |
92083 |
Exam of visual field with extended testing | 29 | 29 | $59 |
In context: peer comparison
Among 5 peers in this city , average services per provider: 181. This provider delivers 23× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
514
Patients
156
Total drug cost
$19,851
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Latanoprost | Generic | 319 | 95 | $6,073 |
| Timolol Maleate | Generic | 110 | 36 | $2,058 |
| Brimonidine Tartrate | Generic | 36 | 0 | $547 |
| Prednisolone Acetate | Generic | 25 | 25 | $1,131 |
| Restasis (Cyclosporine) | Brand | 13 | 0 | $9,966 |
| Dorzolamide-Timolol (Dorzolamide Hcl/Timolol Maleat) | Brand | 11 | 0 | $76 |
Frequently asked questions
What is Dr. Nikolas Diemer's medical specialty?
Dr. Nikolas Diemer practices Optometrist in Freeport, IL.
Where does Dr. Nikolas Diemer practice?
Dr. Nikolas Diemer practices at 1000 Kiwanis Dr, Freeport, IL 610326921. Office phone: 8152356177.
What is Dr. Nikolas Diemer's NPI?
Dr. Nikolas Diemer's National Provider Identifier (NPI) is 1588766281, issued by NPPES.
What procedures does Dr. Nikolas Diemer commonly perform?
Top Medicare-reported procedures in 2023: Removal of cataract with insertion of prosthetic lens (HCPCS 66984); Established patient office or other outpatient visit (HCPCS 99214); Photography of the retina (HCPCS 92250). Source: CMS Medicare Physician & Other Practitioners file.