2026 NPPES data Retina Specialist (Ophthalmology) Physician NPI 1922340066 M.D,
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REHAN HUSSAIN, M.D,

Retina Specialist (Ophthalmology) Physician in ELGIN, 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
416
Medicare Part D claims · 127 beneficiaries · Retina Specialist (Ophthalmology) Physician avg: 558
Generic prescribing
68%
generic claims · 32% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$7.5K
20 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

REHAN HUSSAIN, M.D, filed 416 Medicare Part D claims in 2023 as a Retina Specialist (Ophthalmology) Physician in ELGIN, Illinois, prescribing 68% generic.

416
Part D claims, 2023
68%
generic prescribing
Likely
board-certified (heuristic)

Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) — no proprietary rating or editorial opinion is applied.

REHAN HUSSAIN, M.D,'s Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

416 Top 38% higher than 62% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). This entry sits in this band. 600–800: 56,224 prescribers (4%). Above this entry. 800–1,000: 40,919 prescribers (3%). Above this entry. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2,000–2,200: 213,991 prescribers (16%). Above this entry. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source CMS Medicare Part D Prescriber Public Use File · 2023

Board certification likely (heuristic — not verified)

REHAN HUSSAIN, M.D, practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 4 hospital affiliations — signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

What does the federal data show about REHAN HUSSAIN, M.D,?

Quality data not reported

NPI registry status

Active

Issued 03/26/2013

NPI 1922340066

Primary specialty

Retina Specialist (Ophthalmology) Physician

Niche

913 US NPIs in this specialty

Medicare Part D claims

416 25% 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).

REHAN HUSSAIN, M.D, is a Retina Specialist (Ophthalmology) Physician provider practicing in ELGIN, Illinois, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: M.D,. NPI: 1922340066. 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.

REHAN HUSSAIN, M.D, appears in the CMS NPPES registry as a Retina Specialist (Ophthalmology) Physician provider holding M.D, credentials at 1530 N RANDALL RD STE 202, ELGIN, IL, 60123, with a listed phone of (847) 488-1030. NPI 1922340066 was issued on 03/26/2013. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what HUSSAIN 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 416 prescription claims written by this provider, covering 127 Medicare beneficiaries and totaling roughly $20K in drug spend, split 32% brand-name and 68% 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

1530 N RANDALL RD STE 202
ELGIN, IL 60123

Provider Details

NPI 1922340066
Specialty Retina Specialist (Ophthalmology) Physician
Credentials M.D,
Gender Male
NPI Issued 03/26/2013

Hospital and facility affiliations

Facilities where REHAN HUSSAIN, M.D, bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" — a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.

DEAN MCGEE EYE INSTITUTE
OKLAHOMA CITY, OK
GAILEY EYE CLINIC, LTD
GALESBURG, IL
MIDWEST RETINA CONSULTANTS SC
DES PLAINES, IL
SIMPSON EYE PHYSICIANS AND SURGEONS PLLC
WEST DUNDEE, IL

Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).

Industry payments received (2024) — CMS Open Payments transparency data

The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for REHAN HUSSAIN, M.D,. Source: openpaymentsdata.cms.gov.

Total received

$7.5K

Largest payer

Regeneron Pharmaceuticals, Inc.

Most common payment type

Food and Beverage

Industry payments are not necessarily indicators of bias — they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.

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 REHAN HUSSAIN, M.D,. To verify REHAN HUSSAIN, M.D,'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

REHAN HUSSAIN, M.D, — brand share 32.0%
Specialty average (est.)

32% brand-name claims vs 68% generic, on 416 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.

416
Total Claims
$20K
Total Drug Cost
127
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
657
Total Day Supply
17,534
Brand vs Generic
32% brand / 68% generic
Brand Drug Cost
$13K
Generic Drug Cost
$7K

Patient Demographics

Average Patient Age
77.5 years
Avg HCC Risk Score
1.27
Gender Split
53% female / 47% 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
Prednisolone Acetate
100
Ketorolac Tromethamine
73
Latanoprost
52
Dorzolamide-Timolol
Dorzolamide Hcl/Timolol Maleat
48
Brimonidine Tartrate
38
Moxifloxacin
Moxifloxacin Hcl
17
Timolol Maleate
17
Atropine Sulfate
11
Mycophenolate Mofetil
11

* 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 REHAN HUSSAIN, M.D, 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

REHAN HUSSAIN, M.D,'s 416 claims are below 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 HUSSAIN.

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

Frequently Asked Questions

What is REHAN HUSSAIN, M.D,'s specialty?
REHAN HUSSAIN, M.D, specializes in Retina Specialist (Ophthalmology) Physician and practices in ELGIN, Illinois. Credentials: M.D,.
How much does REHAN HUSSAIN, M.D, prescribe under Medicare Part D?
In 2023, REHAN HUSSAIN, M.D, wrote 416 Medicare Part D claims totaling $20K in drug costs for 127 beneficiaries.
Where is REHAN HUSSAIN, M.D, located?
REHAN HUSSAIN, M.D, is located at 1530 N RANDALL RD STE 202, ELGIN, IL, 60123. Phone: (847) 488-1030.
What is REHAN HUSSAIN, M.D,'s NPI number?
REHAN HUSSAIN, M.D,'s National Provider Identifier (NPI) is 1922340066, issued on 03/26/2013.
Does REHAN HUSSAIN, M.D, prescribe more brand-name or generic drugs?
REHAN HUSSAIN, M.D,'s prescribing is 32% brand-name and 68% generic drugs by claim count, with $13K 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 REHAN HUSSAIN, M.D, prescribe most often?
Based on 2023 Medicare Part D data, REHAN HUSSAIN, M.D,'s most frequently prescribed drugs include Prednisolone Acetate, Ketorolac Tromethamine, Latanoprost. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does REHAN HUSSAIN, M.D, accept Medicare?
REHAN HUSSAIN, M.D, appears in CMS Medicare data with 416 Part D claims and 127 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify REHAN HUSSAIN, M.D,'s credentials?
REHAN HUSSAIN, M.D,'s NPI is 1922340066 with credentials M.D,. 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