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Internal Medicine - Nephrology Specialists in Oak Lawn, IL

Browse 13 Internal Medicine - Nephrology providers listed in NPPES with a practice address in Oak Lawn, Illinois.

13 Healthcare Providers

How Oak Lawn compares with the U.S.

Oak Lawn has 23 clinicians in Internal Medicine - Nephrology per 100,000 residents, 5.7 times the U.S. rate of 4.0.

That is 13 active clinicians in Internal Medicine - Nephrology with a practice address in Oak Lawn, for a population of 56,861.

The Illinois rate is 4.5 per 100,000 residents.

What these numbers mean

Clinicians per 100,000 residents compares places of different sizes. We count active clinicians who list a practice address in the area in the federal NPI registry (NPPES) and divide by the number of people who live there, according to the U.S. Census Bureau. The U.S. rate is the same calculation for the whole country.

A higher number does not mean it is easier to get an appointment, that wait times are shorter, or that care is better. It also does not show how many clinicians are accepting new patients or which insurance plans they take. A lower number does not by itself mean there is a shortage.

City counts use the city name in each clinician's practice address. That postal city can cover a larger or smaller area than the city limits the Census Bureau uses for population, and many clinicians list only one address even if they work in several places. Cities with hospitals or large medical centers often list more specialists than the number of residents alone would suggest, because patients also come from nearby areas.

100% of clinicians in Internal Medicine - Nephrology in Oak Lawn listed in the CMS Medicare file (11 of 11) accept Medicare assignment. That is similar to the Illinois share of 97%.

What is Medicare assignment?

A clinician who accepts Medicare assignment agrees to take the Medicare-approved amount as full payment for services that Original Medicare covers. You usually still pay your deductible and coinsurance. This comes from the CMS Doctors and Clinicians file and applies to Original Medicare only. Medicare Advantage plans have their own provider networks. It does not show whether a clinician is taking new patients.

Some clinicians are listed as "may accept assignment," which means they can decide case by case. Clinicians without an assignment flag, or who are not in the CMS file, are not counted as accepting assignment. That does not mean they refuse Medicare. Ask the office before your visit.

36% of clinicians in Internal Medicine - Nephrology in Oak Lawn listed in the CMS Medicare file (4 of 11) have a CMS telehealth indicator, meaning their recent Medicare claims include telehealth services. That is lower than the Illinois share of 49%.

About the telehealth indicator

The telehealth indicator comes from CMS. It marks clinicians whose recent paid Medicare claims include services delivered by telehealth. It means a clinician has provided some services by telehealth, not that every visit can be done online. A clinician without the indicator may still offer telehealth, for example to patients who are not on Medicare. Ask the office which visits can be done by video or phone.

These figures summarize public federal data. They do not measure quality of care, appointment availability, or whether a clinician accepts your insurance or new patients. Registry addresses can be out of date. Please confirm details directly with the office and your plan. This information is not medical advice.

Prepared by T-MedInfo from NPPES, CMS and U.S. Census Bureau data. Questions or corrections: support@true-medinfo.com ยท Methodology

Sources: Clinician counts and practice addresses: NPPES NPI Registry, Centers for Medicare & Medicaid Services (CMS), data as of August 2026. Medicare assignment and telehealth indicators: CMS Doctors and Clinicians National Downloadable File. Population: U.S. Census Bureau, American Community Survey 2020-2024 5-Year Estimates, Table B01003 (Total Population).

Internal Medicine - Nephrology Medicare (PECOS) Enrollment & Ordering Eligibility

Medicare enrollment and order/referring eligibility listed by CMS for Internal Medicine - Nephrology practitioners in Oak Lawn, IL

Source: CMS PECOS
PECOS Enrolled Specialists 11 In Oak Lawn, IL
Part B Lab & Imaging Eligible 12 Diagnostic Referrals
DME Ordering Eligible 12 Durable Medical Equipment
Home Health Agency Referrals 12 HHA Ordering Eligible
Showing 1โ€“13 of 13 providers
With recent CMS data first, then Aโ€“Z

Dr. Hani Alsharif , MD

Internal Medicine - Nephrology

Active NPI Status Accepts Medicare Assignment
4457 Southwest Hwy Ste 201, Oak Lawn, IL 604533778
Phone: 7085982448
NPI Identifier 1598974149
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Dr. Michael E Arvan , MD

Internal Medicine - Nephrology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
4542 W 95th St, Oak Lawn, IL 604532627
Phone: 7084250522
NPI Identifier 1336195528
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Dr. Mohamad Barakat , MD

Internal Medicine - Nephrology

Active NPI Status Accepts Medicare Assignment
4700 W 95th St, Suite 103, Oak Lawn, IL 604532533
Phone: 7084229771
NPI Identifier 1770523201
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Dr. Darshika Chhabra , MD

Internal Medicine - Nephrology

Active NPI Status Accepts Medicare Assignment
4400 W 95th St Ste 112, Oak Lawn, IL 604532657
Phone: 7086847100
NPI Identifier 1003015116
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Dr. Sonja Marcic , MD

Internal Medicine - Nephrology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
4457 Southwest Highway, Suite 201, Oak Lawn, IL 60453
Phone: 7085982448
NPI Identifier 1700823192
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Dr. Jeanette Mclaughlin , MD

Internal Medicine - Nephrology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
4400 W 95th St Ste 112, Oak Lawn, IL 604532657
Phone: 7086847100
NPI Identifier 1922138254
View Full Profile

Osezua Olear

Internal Medicine - Nephrology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
4457 Southwest Highway, Suite 201, Oak Lawn, IL 60453
Phone: 7085982448
NPI Identifier 1346650249
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Dr. Muhammad Omer , MD

Internal Medicine - Nephrology

Active NPI Status Accepts Medicare Assignment
4457 Southwest Highway, Suite 201, Oak Lawn, IL 60453
Phone: 7085982448
NPI Identifier 1154529105
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Dr. Sreya Pallath , MD

Internal Medicine - Nephrology

Active NPI Status Accepts Medicare Assignment
4542 W 95th St, Oak Lawn, IL 604532627
Phone: 7084250522
NPI Identifier 1467489583
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Dr. James J Rydel , MD

Internal Medicine - Nephrology

Active NPI Status Accepts Medicare Assignment
4542 W 95th St, Oak Lawn, IL 604532627
Phone: 7084250522
NPI Identifier 1225078413
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Dr. Sushant Ramdas Taksande , MD

Internal Medicine - Nephrology

Active NPI Status Accepts Medicare Assignment
4457 Southwest Highway, Suite 201, Oak Lawn, IL 60453
Phone: 7085982448
NPI Identifier 1336375096
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Dr. Kent F Armbruster , MD

Internal Medicine - Nephrology

Active NPI Status
9800 Southwest Hwy, Oak Lawn, IL 604533617
Phone: 7082296985
NPI Identifier 1972528321
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Dr. Georgeous Morcos , MD

Internal Medicine - Nephrology

Active NPI Status
4457 Southwest Hwy Ste 201, Oak Lawn, IL 604533778
Phone: 7085982448
NPI Identifier 1306787338
View Full Profile

Frequently Asked Questions about Internal Medicine - Nephrology in Oak Lawn

How do I check a Internal Medicine - Nephrology practitioner's license?

Each practitioner profile shows the NUCC taxonomy code and any state license number the practitioner reported to NPPES, plus a link to the Illinois licensing board lookup. NPPES entries are self-reported; current license status is published only by the state board.

Why is a practitioner missing from this list?

This list shows NPI records that are active in NPPES. A deactivated NPI keeps its profile with the deactivation date and practice history; find it with the site search by name or NPI number.