What is Mark Greiner's specialty?

Mark Greiner (NPI 1194992958) is a Medicare-billing provider whose primary specialty is Ophthalmology in Iowa City, IA.

Where does Mark Greiner practice?

Mark Greiner practices in Iowa City, IA, based on the location reported in the CMS Medicare provider datasets for NPI 1194992958.

How much does Medicare pay Mark Greiner?

Mark Greiner (NPI 1194992958) received approximately $166K in total Medicare Part B payments, serving 604 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1194992958

Mark GreinerM.D.

PRACTICEUIHC UROLOGY CLINICSee all providers at this practice →

OphthalmologyIowa City, IAI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

1,599

Unique beneficiaries

—

Total services

2,031

Distinct HCPCS

Medicare payment

$138K

Peer benchmark

Total Medicare services vs. 135 Ophthalmology providers in IA — below median (cohort median 2,957).

PRESCRIBING · PART D · 2024

Total Rx claims

1,248

Beneficiaries

—

Total drug cost

$76K

Distinct drugs

Brand share

26.6%

Top prescribed drugs

Prednisolone Acetate331 claims

Fluorometholone273 claims

Valacyclovir Hcl134 claims

Moxifloxacin Hcl107 claims

Medroxyprogesterone Acetate58 claims

QUALITY · MIPS · 2024

Final MIPS score

80.0

Quality

75.7

Cost

72.3

Improvement activities

40.0

Promoting interop.

78.0

Payment adjustment

0.21%

Group

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024

No data available for this provider in 2024.

FACILITY AFFILIATIONS

Hospital & Facility Affiliations (1)

CCN 160058

Hospital

REFERRAL NETWORK

Where Mark Greiner's patients come from & go

Directional shared-patient flow from Medicare claims — who sends patients to this provider (inbound) and where this provider's patients go next (outbound). 3 inbound referrers · 7 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
STATE UNIVERSITY OF IOWA	156	1,211
Nasreen Syed Ophthalmology · Iowa City, IA	31	124
ALWARD, WALLACE	23	100

Refers patients to

Outbound — where patients go next

Physician	Patients	Visits
STATE UNIVERSITY OF IOWA	375	3,008
Nasreen Syed Ophthalmology · Iowa City, IA	34	112
Matthew Raecker Ophthalmology · West Des Moines, IA	19	119
Mark Wilkinson Optometry · Iowa City, IA	16	44
Maya Mathews Certified Registered Nurse Anesthetist (CRNA) · Iowa City, IA	13	38
KIRBY, PATRICIA	13	40
Herbert Boldt Ophthalmology · Iowa City, IA	12	65

Source: CMS Physician Shared Patient Patterns (30-day window, Medicare FFS). Direction = a beneficiary seen by the first provider, then the second, within 30 days; a proxy for referral, not a documented referral. Pairs with fewer than 11 shared beneficiaries are suppressed.

CROSS-REFERENCE

Related data on other Healthparse brands

ProviderScore

OIG/SAM exclusion screening, sanctions history

Healthparse Signals

Monitor this provider for changes — dated NPI change events