2026 NPPES data Retina Specialist (Ophthalmology) Physician NPI 1881217552 MD, PHD
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ISMINI KOULOURI, MD, PHD

Retina Specialist (Ophthalmology) Physician in CHICAGO, Illinois. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
739
Medicare Part D claims · 135 beneficiaries · Retina Specialist (Ophthalmology) Physician avg: 558
Generic prescribing
69%
generic claims · 31% brand-name · higher generic rates reduce patient out-of-pocket costs
What the federal data reveals: ISMINI KOULOURI, MD, PHD is a Retina Specialist (Ophthalmology) Physician ([object Object]) practicing in CHICAGO, Illinois with a Medicare Part D prescribing footprint of 739 claims across 135 beneficiaries — 31% brand-name prescribing .

What stands out: ISMINI KOULOURI, MD, PHD filed 739 Medicare Part D claims in 2023 across CHICAGO, Illinois. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board-eligible specialty (heuristic — not verified)

ISMINI KOULOURI, MD, PHD practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).

ISMINI KOULOURI, MD, PHD at a glance

Quality data not reported

NPI registry status

Active

Issued 05/28/2020

NPI 1881217552

Primary specialty

Retina Specialist (Ophthalmology) Physician

Niche

913 US NPIs in this specialty

Medicare Part D claims

739 32% vs specialty avg

2023 prescription claims

Specialty avg: 558

Specialty distribution in Illinois

How Retina Specialist (Ophthalmology) Physician compares to other specialties among Illinois providers

Illinois providers

Retina Specialist (Ophthalmology) Physician share within Illinois

1. Retina Specialist (Ophthalmology) Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Retina Specialist (Ophthalmology) Physician share within Illinois

Specialty board-certification context

Estimated specialty board-certified rate — Retina Specialist (Ophthalmology) Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Retina Specialist (Ophthalmology) Physician ABMS/AOA estimate

Est. board-certified rate (Retina Specialist (Ophthalmology) Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Retina Specialist (Ophthalmology) Physician) — ABMS / AOA estimate

The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.

Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).

ISMINI KOULOURI, MD, PHD is a Retina Specialist (Ophthalmology) Physician provider practicing in CHICAGO, Illinois, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD, PHD. NPI: 1881217552. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

ISMINI KOULOURI, MD, PHD appears in the CMS NPPES registry as a Retina Specialist (Ophthalmology) Physician provider holding MD, PHD credentials at 1950 W POLK ST FL 5, CHICAGO, IL, 60612, with a listed phone of (857) 253-9475. NPI 1881217552 was issued on 05/28/2020. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what KOULOURI most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 739 prescription claims written by this provider, covering 135 Medicare beneficiaries and totaling roughly $69K in drug spend, split 31% brand-name and 69% generic by claim count. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

Retina Specialist (Ophthalmology) Physician is a narrow specialty nationwide, with 913 enrolled providers across 48 states and an average of 558 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline. Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist — always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.

Practice Address

1950 W POLK ST FL 5
CHICAGO, IL 60612

Provider Details

NPI 1881217552
Specialty Retina Specialist (Ophthalmology) Physician
Credentials MD, PHD
Gender Female
NPI Issued 05/28/2020

License & disciplinary context — Illinois IDFPR 2023 annual report

Aggregate state board data only — NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~42K Illinois medical licensees in 2023 — they are NOT specific to ISMINI KOULOURI, MD, PHD. To verify ISMINI KOULOURI, MD, PHD's current license status, search the IDFPR public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.

106
Total board actions, Illinois 2023
Across 103 cases
2.52
Actions per 1,000 licensees
Illinois statewide rate
probation
Most common action type
38 cases

IDFPR publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the Illinois disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.

Brand vs generic prescribing mix · Above average

ISMINI KOULOURI, MD, PHD — brand share 31.0%
Specialty average (est.)

31% brand-name claims vs 69% generic, on 739 2023 Medicare Part D claims.

The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

739
Total Claims
$69K
Total Drug Cost
135
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
971
Total Day Supply
27,199
Brand vs Generic
31% brand / 69% generic
Brand Drug Cost
$50K
Generic Drug Cost
$19K

Patient Demographics

Average Patient Age
74.6 years
Avg HCC Risk Score
1.26
Gender Split
61% female / 39% male

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

Drug Claims
Latanoprost
343
Brimonidine Tartrate
67
Timolol Maleate
58
Dorzolamide-Timolol
Dorzolamide Hcl/Timolol Maleat
53
Brinzolamide
39
Combigan
Brimonidine Tartrate/Timolol
38
Dorzolamide Hcl
29
Rhopressa
Netarsudil Mesylate
19
Brimonidine Tartrate-Timolol
Brimonidine Tartrate/Timolol
17
Prednisolone Acetate
13

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Retina Specialist (Ophthalmology) Physician Overview

How ISMINI KOULOURI, MD, PHD fits within the Retina Specialist (Ophthalmology) Physician landscape nationally.

913
Retina Specialist (Ophthalmology) Physician Providers in US
48
States with Retina Specialist (Ophthalmology) Physician
558
Avg Claims per Provider

ISMINI KOULOURI, MD, PHD's 739 claims are above the specialty average of 558.

Nearby Retina Specialist (Ophthalmology) Physician Providers in Illinois

Other clinicians with the same primary specialty enrolled in Illinois, drawn from the same CMS NPPES roster as KOULOURI.

Compare Retina Specialist (Ophthalmology) Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is ISMINI KOULOURI, MD, PHD's specialty?
ISMINI KOULOURI, MD, PHD specializes in Retina Specialist (Ophthalmology) Physician and practices in CHICAGO, Illinois. Credentials: MD, PHD.
How much does ISMINI KOULOURI, MD, PHD prescribe under Medicare Part D?
In 2023, ISMINI KOULOURI, MD, PHD wrote 739 Medicare Part D claims totaling $69K in drug costs for 135 beneficiaries.
Where is ISMINI KOULOURI, MD, PHD located?
ISMINI KOULOURI, MD, PHD is located at 1950 W POLK ST FL 5, CHICAGO, IL, 60612. Phone: (857) 253-9475.
What is ISMINI KOULOURI, MD, PHD's NPI number?
ISMINI KOULOURI, MD, PHD's National Provider Identifier (NPI) is 1881217552, issued on 05/28/2020.
Does ISMINI KOULOURI, MD, PHD prescribe more brand-name or generic drugs?
ISMINI KOULOURI, MD, PHD's prescribing is 31% brand-name and 69% generic drugs by claim count, with $50K in brand drug costs.
How many Retina Specialist (Ophthalmology) Physician providers are there in the US?
There are 913 Retina Specialist (Ophthalmology) Physician providers across 48 states in the US. The average Retina Specialist (Ophthalmology) Physician provider writes 558 Medicare Part D claims per year.
What drugs does ISMINI KOULOURI, MD, PHD prescribe most often?
Based on 2023 Medicare Part D data, ISMINI KOULOURI, MD, PHD's most frequently prescribed drugs include Latanoprost, Brimonidine Tartrate, Timolol Maleate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does ISMINI KOULOURI, MD, PHD accept Medicare?
ISMINI KOULOURI, MD, PHD appears in CMS Medicare data with 739 Part D claims and 135 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify ISMINI KOULOURI, MD, PHD's credentials?
ISMINI KOULOURI, MD, PHD's NPI is 1881217552 with credentials MD, PHD. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.

Data Sources

Provider Directory
CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
Specialty Classification
NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
Prescribing Data
CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
Limitations
Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.

See our complete data methodology for details on how we collect and process government data.

Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).

Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology