Doctor profile · Federal record
Dr. Mark Greiner, M.D.
Ophthalmology Physician (CMS: Ophthalmology) · Student in an Organized Health Care Education/Training Program · Iowa City, IA
- NPI 1194992958
- Accepts Medicare
- 19 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
200 Hawkins Dr
Iowa City, IA 522421009
(319) 356-2861
fax (319) 356-0363
Credentials & registration
- NPI registered
- May 2008 — 18 yrs on file
- Profile last updated
- August 16, 2012
- Year of graduation
- 2007 — 19 yrs since
- Specialty taxonomy
- 207W00000X — NUCC code
- State license (1)
- Iowa #40489
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1194992958. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
2,224
Distinct HCPCS
10
Medicare allowed
$188,634
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
76514 |
Ultrasound scan of cornea to determine thickness | 587 | 403 | $7 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 564 | 409 | $91 | |
92025 |
Ct scan of cornea | 236 | 201 | $18 | |
92286 |
Imaging of front third of eye using a special microscope | 176 | 160 | $20 | |
92014 |
Established patient complete exam of visual system | 82 | 82 | $71 | |
92285 |
Photography of content of eyes | 81 | 70 | $3 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 77 | 72 | $61 | |
92136 |
Measurement of corneal curvature and depth of eye | 68 | 58 | $29 | |
65756 |
Transplantation of outer layer of corneal tissue | 56 | 45 | $1,036 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 50 | 50 | $122 |
In context: peer comparison
Among 15 peers in this city , average services per provider: 114. This provider delivers 20× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
1,029
Patients
387
Total drug cost
$67,811
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Prednisolone Acetate | Generic | 277 | 147 | $16,664 |
| Fluorometholone | Generic | 177 | 67 | $19,516 |
| Valacyclovir (Valacyclovir Hcl) | Brand | 138 | 48 | $9,906 |
| Doxycycline Hyclate | Generic | 74 | 21 | $4,228 |
| Moxifloxacin (Moxifloxacin Hcl) | Brand | 68 | 40 | $2,269 |
| Latanoprost | Generic | 50 | 11 | $689 |
| Medroxyprogesterone Acetate | Generic | 45 | 0 | $2,740 |
| Dorzolamide-Timolol (Dorzolamide Hcl/Timolol Maleat) | Brand | 44 | 17 | $783 |
| Ketorolac Tromethamine | Generic | 33 | 21 | $1,726 |
| Acyclovir | Generic | 30 | 0 | $646 |
Hospital affiliations
Frequently asked questions
What is Dr. Mark Greiner's medical specialty?
Dr. Mark Greiner practices Ophthalmology Physician in Iowa City, IA.
Where does Dr. Mark Greiner practice?
Dr. Mark Greiner practices at 200 Hawkins Dr, Iowa City, IA 522421009. Office phone: 3193562861.
What is Dr. Mark Greiner's NPI?
Dr. Mark Greiner's National Provider Identifier (NPI) is 1194992958, issued by NPPES.
Does Dr. Mark Greiner accept Medicare assignment?
Yes. Dr. Mark Greiner accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Mark Greiner commonly perform?
Top Medicare-reported procedures in 2023: Ultrasound scan of cornea to determine thickness (HCPCS 76514); Established patient office or other outpatient visit (HCPCS 99214); Ct scan of cornea (HCPCS 92025). Source: CMS Medicare Physician & Other Practitioners file.