Independent US Healthcare Provider Directory & Public Medical Database Patient Guides

Dr. Sudip Dilip Thakar , MD

Ophthalmology โ€ข Chicago, IL

Active NPI 1811492432 Individual Practitioner Male Practitioner Accepts Medicare assignment
Practice location in NPPES

251 E Huron St
Chicago, IL 606112908

Call 3129262000 Location details and other listings
Medical Disclaimer

This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.

Practice Location & Contact Primary Location

Practice Address

251 E Huron St

Chicago, IL 606112908

Telephone 3129262000
Organization at the Same NPPES Address or Phone
Northwestern Radiology Oncology Assoc Facility NPI 1831164052

Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.

Other Listings in Public Data

NPPES lists 5 distinct additional practice-address records in Chicago, IL; Grayslake, IL; Spring, TX. See the list

Source: CMS NPPES NPI Registry, practice location records; release date unavailable.

CMS Doctors and Clinicians lists 1 group name: Kelsey-Seybold Medical Group, Pllc. See the list

Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026.

Listings do not confirm current availability, employment or a shared ownership network.

Medicare Profile & Education

Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026

Medical School

Baylor College Of Medicine

Graduation Year

2018

Medicare patients

73 people with Original Medicare in 2023

Different Original Medicare patients in 2023; counts below 11 are hidden; this does not show availability or quality.

Source: CMS, Medicare Physician & Other Practitioners โ€“ by Provider, 2023.

Medicare-allowed amount

About $4,395 in 2023

The total amount Medicare approved for these services in 2023. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.

What this does not show: Medicare-allowed amount

This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.

Source: CMS, Medicare Physician & Other Practitioners โ€“ by Provider and Service, 2023.

Paid by Medicare

About $3,294 in 2023

The part of the Medicare-allowed amount that Medicare itself paid in 2023, after patients' deductibles and coinsurance.

What this does not show: Paid by Medicare

This is not the clinician's income and not a measure of quality.

Source: CMS, Medicare Physician & Other Practitioners โ€“ by Provider and Service, 2023.

30-day fills

256 standardized 30-day fills in 2024

CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.

What this does not show: 30-day fills

It is not a count of patients and not a measure of quality.

Part D drug cost

$2,136 in 2024

The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.

What this does not show: Part D drug cost

A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.

Source: CMS, Medicare Part D Prescribers โ€“ by Provider and Drug, 2024.

Open Payments general payments, program year 2022

All general payments: $217.08 across 2 records.

By nature of payment

  • Food and Beverage: $217.08 across 2 records.

Reporting-company totals

  • Genentech, Inc.: $135.00 across 1 record.
  • Horizon Therapeutics plc: $82.08 across 1 record.

A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.

See the full table

Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2022 (published June 30, 2026).

Guide: How to read an Open Payments record

Years since graduation

8 years (graduated 2018)

CMS Doctors and Clinicians data list 2018 as the year this clinician finished professional school.

What this does not show: Years since graduation

It is not the number of years in practice, and more years does not mean better care.

Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026.

NPI first issued

2018

The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.

What this does not show: NPI first issued

NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.

Source: CMS NPPES NPI Registry.

Accepts Medicare assignment

CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.

Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.

Source: CMS Doctors and Clinicians, CMS release of October 2, 2026; Medicare.gov, โ€œDoes your provider accept Medicare as full payment?โ€

Guide: What Medicare assignment means

No telehealth indicator

CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.

Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians, CMS release of October 2, 2026.

Guide: How Medicare covers telehealth

Enrolled in Medicare (PECOS)

Dr. Thakar has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.

It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.

Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.

Guide: What Medicare enrollment (PECOS) means

Can order Medicare-covered services

CMS lists Dr. Thakar as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.

What this does not show: Can order Medicare-covered services

It does not mean the clinician offers these services directly.

Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.

Guide: What ordering and referring status means

Compared with the same specialty in Chicago and Illinois

Billing and prescribing volume is not a quality rating.

Medicare Part D prescriptions

Close to the middle for clinicians listed under Ophthalmology in Chicago, IL (2024, 174 clinicians with data). Median for this group: 369. Middle half: 132 to 1,304.

Fewer Part D prescriptions than 75% of clinicians listed under Ophthalmology in Illinois (2024, 566 clinicians with data). Median for this group: 895. Middle half: 290 to 1,981.

Part D drug cost

A lower Part D drug cost than 80% of clinicians listed under Ophthalmology in Chicago, IL (2024, 174 clinicians with data). Median for this group: $20,443. Middle half: $3,052 to $113,866.

A lower Part D drug cost than 85% of clinicians listed under Ophthalmology in Illinois (2024, 566 clinicians with data). Median for this group: $72,065. Middle half: $10,267 to $187,098.

Medicare Part B

Comparisons use 2024 data. The latest CMS data for Dr. Thakar are from 2023.

302 active clinicians are listed under Ophthalmology with a practice address in Chicago, IL (893 in Illinois).

Addresses are self-reported to NPPES and may be out of date.

Telehealth indicator in Chicago

1.3% of these 302 clinicians have the CMS telehealth indicator.

54.6% of these 302 clinicians are listed by CMS as accepting Medicare assignment.

Sources: CMS Medicare Physician & Other Practitioners (2023), CMS Medicare Part D Prescribers (2024), CMS Open Payments (2022), CMS Doctors and Clinicians, CMS release of October 2, 2026, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.

Text: T-MedInfo ยท Report an error.

Pharma & Medical Device Financial Disclosures

Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments

Open Payments ยท Program Year 2022
Disclosure Year:

Program year 2022 (payments made January 1 โ€“ December 31, 2022): fewer than 11 records totaling $217.08.

Manufacturer Payment Nature Product Type Amount ($)
Genentech, Inc.
Food and Beverage
In-kind items and services
Erivedge General $135.00
Horizon Therapeutics plc
Food and Beverage
In-kind items and services
TEPEZZA General $82.08

Source: CMS Open Payments, program year 2022, released June 30, 2026.

Performed Procedures & Service Volume

Services billed to Original Medicare Part B in 2023.

CMS Part B ยท Data Year 2023

CPTยฎ is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2022 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners โ€“ by Provider and Service data, 2023; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.

HCPCS Code Services Patients Submitted Charge Medicare Allowed
99441 Telephone medical discussion with physician, 5-10 minutes
24 24 $55.00 $52.77
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
15 15 $255.00 $121.24
92014 Established patient complete exam of visual system
11 11 $291.00 $119.12

Source: CMS Part B by Provider and Service, 2023; services under 11 beneficiaries omitted by CMS. Privacy limits

Submitted charges are billed amounts, not a price quote for your visit.

Medicare Part D Prescribing Profile & Medications

Medicare Part D prescriptions filled, including refills, in 2024.

CMS Part D ยท Data Year 2024
Prescription Year:
Brand Name Generic Name Prescriptions Day Supply Total Cost Patients
Erythromycin Erythromycin Base 173 2,368 $1,749.92 133
Tramadol Hcl Tramadol Hcl 53 110 $55.44 52
Neomycin-Polymyxin-Dexameth Neomycin/Polymyxin B/Dexametha 29 506 $330.70 26

Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits

Specialties & License Numbers Reported to NPPES

Self-certified to NPPES: 2024-05-20
Ophthalmology Primary Specialty

NUCC Taxonomy Code: 207W00000X

License # reported to NPPES TX V1285

An ophthalmologist has the knowledge and professional skills needed to provide comprehensive eye and vision care. Ophthalmologists are medically trained to diagnose, monitor and medically or surgically treat all ocular and visual disorders. This includes problems affecting the eye and its component structures, the eyelids, the orbit and the visual pathways. In so doing, an ophthalmologist prescribes vision services, including glasses and contact lenses.

Ophthalmology

NUCC Taxonomy Code: 207W00000X

License # reported to NPPES IL 125.072705

An ophthalmologist has the knowledge and professional skills needed to provide comprehensive eye and vision care. Ophthalmologists are medically trained to diagnose, monitor and medically or surgically treat all ocular and visual disorders. This includes problems affecting the eye and its component structures, the eyelids, the orbit and the visual pathways. In so doing, an ophthalmologist prescribes vision services, including glasses and contact lenses.

Ophthalmology

NUCC Taxonomy Code: 207W00000X

License # reported to NPPES NC 2022-00965

An ophthalmologist has the knowledge and professional skills needed to provide comprehensive eye and vision care. Ophthalmologists are medically trained to diagnose, monitor and medically or surgically treat all ocular and visual disorders. This includes problems affecting the eye and its component structures, the eyelids, the orbit and the visual pathways. In so doing, an ophthalmologist prescribes vision services, including glasses and contact lenses.

Check License Status with the State Board License numbers are self-reported to NPPES; T-MedInfo does not confirm them against state records. Current status: Illinois Department of Financial and Professional Regulation.
Look Up on State Board Site

Medicare (PECOS) Enrollment & Ordering Eligibility

Source: CMS PECOS
Medicare FFS Enrollment Status Medicare Enrollment on File
CMS Provider Specialty

PRACTITIONER - OPHTHALMOLOGY

Medicare Enrollment ID

I20240808004369

Enrollment State Jurisdiction

TX

PECOS Control ID

3870839178

Medicare Order & Referring Eligibility
Clinical Lab & Imaging (Part B) Eligible
Durable Medical Equipment (DME) Eligible
Home Health Agency (HHA) Eligible
Power Mobility Devices (PMD) Eligible

Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.

Medicare Group Practice Enrollments

Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026

Kelsey-Seybold Medical Group, Pllc

22407 Holzwarth Rd, Spring, TX 773891933

Phone: 3466744000

Secondary Practice Locations

22407 Holzwarth Road

Spring, TX 77389

Phone: 3466744000

225 E Chicago Ave

Chicago, IL 606112991

Phone: 3122274000

2750 W North Ave

Chicago, IL 606475247

Phone: 3126663494

1475 E Belvidere Rd

Grayslake, IL 600302012

Phone: 8475357157

355 E Erie St

Chicago, IL 606113167

Phone: 3122381000

Clinicians Sharing This Practice Address or Phone

Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.

12 listed
Dr. Abdul Aadam , MD

Internal Medicine - Gastroenterology

NPI 1013038744

Doctor of Medicine (M.D.)

Dr. Carolyn Erickson , MD

Internal Medicine

NPI 1043572126

Doctor of Medicine (M.D.)

Lindsey Gradone , APN-ACNP

Nurse Practitioner - Acute Care

NPI 1033609508

APNACNP

Vanessa Kalinowska

Obstetrics & Gynecology

NPI 1013619691
Dr. Samer Muallem , MD

Internal Medicine - Interventional Cardiology

NPI 1023549920

Doctor of Medicine (M.D.)

Dr. Charbel Noujaim , MD, MSC

Internal Medicine - Cardiovascular Disease

NPI 1033814694

Doctor of Medicine (M.D.), Master of Science

Career & Practice History Timeline

Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status

14 Historical Events
๐Ÿ“
Updated Business Mailing Address May 24, 2024

Registered at 11511 SHADOW CREEK PKWY, PEARLAND, TX 775847298 (Tel: 7134420000)

๐Ÿข
Secondary Practice Location Registered May 24, 2024

Additional practice office at 22407 Holzwarth Road, Spring, TX 77389

๐Ÿข
Secondary Practice Location Registered May 24, 2024

Additional practice office at 2750 W North Ave, Chicago, IL 606475247

๐Ÿข
Secondary Practice Location Registered May 24, 2024

Additional practice office at 355 E Erie St, Chicago, IL 606113167

๐Ÿข
Secondary Practice Location Registered May 24, 2024

Additional practice office at 1475 E Belvidere Rd, Grayslake, IL 600302012

๐Ÿข
Secondary Practice Location Registered May 24, 2024

Additional practice office at 225 E Chicago Ave, Chicago, IL 606112991

๐ŸŽ“
Medical Taxonomy / Specialty Registered (Primary Specialty) May 24, 2024

Ophthalmology (license number reported to NPPES: TX V1285)

๐ŸŽ“
Medical Taxonomy / Specialty Registered (Primary Specialty) July 15, 2022

Ophthalmology (license number reported to NPPES: IL 125.072705)

โœ…
NPI Profile Active March 26, 2018

NPI status registered as active in NPPES database

๐Ÿ“
Practice Location (Initial Record) March 26, 2018

Registered at 251 E HURON ST, CHICAGO, IL 606112908 (Tel: 3129262000)

๐Ÿ“
Business Mailing Address (Initial Record) March 26, 2018

Registered at 3410 MADELEINE CT, SUGAR LAND, TX 774784241 (Tel: 2817506600)

๐Ÿ‘ค
Provider Name / Credentials (Initial Record) March 26, 2018

Recorded as SUDIP THAKAR, MD

๐ŸŽ“
Medical Taxonomy / Specialty Registered (Primary Specialty) March 26, 2018

Student in an Organized Health Care Education/Training Program

๐ŸŸข
Initial NPI Registration & Enumeration March 26, 2018

First registered as active Individual Practitioner in NPPES Database.

No reviews have been published yet. Leave a review.

NPI Administrative Meta

NPI Number: 1811492432
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: March 26, 2018
Last Update: May 24, 2024
Sole Proprietor: No

Other Ophthalmology Specialists in Chicago

All Ophthalmology Specialists in Chicago

Mailing Address

11511 Shadow Creek Pkwy

Pearland, TX 775847298

Phone: 7134420000

About This Data NPPES fields (address, phone, specialty, license) are self-reported and may be outdated; Medicare fields follow the CMS dataset named in each section. Correct directly at NPPES.