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Internal Medicine Providers in Marion, IL

Browse 17 Internal Medicine providers listed in NPPES with a practice address in Marion, Illinois.

17 Healthcare Providers

How Marion compares with the U.S.

Marion has 101 clinicians in Internal Medicine per 100,000 residents, 2.3 times the U.S. rate of 44.

That is 17 active clinicians in Internal Medicine with a practice address in Marion, for a population of 16,836.

The Illinois rate is 57 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.

Too few clinicians in Internal Medicine in Marion are listed in the CMS Medicare file to report Medicare assignment or telehealth shares.

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 Registry addresses can be out of date.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. Population: U.S. Census Bureau, American Community Survey 2020-2024 5-Year Estimates, Table B01003 (Total Population).

Internal Medicine Medicare (PECOS) Enrollment & Ordering Eligibility

Medicare enrollment and order/referring eligibility listed by CMS for Internal Medicine practitioners in Marion, IL

Source: CMS PECOS
PECOS Enrolled Specialists 13 In Marion, IL
Part B Lab & Imaging Eligible 13 Diagnostic Referrals
DME Ordering Eligible 13 Durable Medical Equipment
Home Health Agency Referrals 13 HHA Ordering Eligible
Showing 1โ€“17 of 17 providers
With recent CMS data first, then Aโ€“Z

Dr. Kevin C Chen , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
3405 Office Park Dr, Marion, IL 629596478
Phone: 6189978412
NPI Identifier 1740291780
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Ramesh Babu Guthikonda

Internal Medicine

Active NPI Status Accepts Medicare Assignment
3333 W Deyoung St, Marion, IL 629595884
Phone: 6189987000
NPI Identifier 1508197997
View Full Profile

Dr. James T Lawler , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
1129 N Carbon St, Ste 2, Marion, IL 629591068
Phone: 6185187700
NPI Identifier 1821353913
View Full Profile

Dr. Michael Patrick Lawler , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
1129 N Carbon St, Marion, IL 629591068
Phone: 6189931111
NPI Identifier 1629203708
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Dr. Colleen M Lawler-Bjornberg , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
1129 N Carbon St, Marion, IL 629591068
Phone: 6189930002
NPI Identifier 1750370243
View Full Profile

Dr. Silpa Maddala , MD

Internal Medicine

Active NPI Status
3333 W Deyoung St, Marion, IL 629595884
Phone: 6189987000
NPI Identifier 1982917373
View Full Profile

Dr. Clinton Jay Mohr , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
1008 W Cherry St, Ste D, Marion, IL 629591998
Phone: 6189972396
NPI Identifier 1356427736
View Full Profile

Dr. James Patrick Richards , MD

Internal Medicine

Active NPI Status
2401 W Main St, Marion, IL 629591188
Phone: 6189985610
NPI Identifier 1275635989
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Dr. Earl H Rudolph , DO

Internal Medicine

Active NPI Status Accepts Medicare Assignment
3333 W Deyoung St, Marion, IL 629595884
Phone: 6189987017
NPI Identifier 1487851481
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Dr. Liudmila Vasilets , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
3111 Williamson County Pkwy, Marion, IL 629595235
Phone: 6185199200
NPI Identifier 1225525579
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Dr. Kirun Naseem Ahmad , DO

Internal Medicine

Active NPI Status
2401 West Main Street, Marion, IL 629591496
Phone: 6182462910
NPI Identifier 1992966873
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Dr. Joseph Dwight Herman , MD

Internal Medicine

Active NPI Status
2401 W Main St, Marion, IL 629591188
Phone: 6189934102
NPI Identifier 1225066186
View Full Profile

Dr. Herman Oscar Lyle , MD

Internal Medicine

Active NPI Status
6563 Wards Mill Road, Marion, IL 629590820
Phone: 6189933692
NPI Identifier 1275530230
View Full Profile

Dr. Mohammed Rahimparast , MD

Internal Medicine

Active NPI Status
2309 Spring Ln, Marion, IL 629596201
Phone: 6189938551
NPI Identifier 1013324599
View Full Profile

Dr. Mannil Ravindranathan , MD

Internal Medicine

Active NPI Status
1008 W Cherry St, Ste D, Marion, IL 629591998
Phone: 6189972396
NPI Identifier 1568468346
View Full Profile

Dr. Weiyi Tang , MD

Internal Medicine

Active NPI Status
2401 W Main St, Marion, IL 629591188
Phone: 6189975311
NPI Identifier 1255307971
View Full Profile

Dr. Byron R Williamson , DO

Internal Medicine

Active NPI Status
3333 W Deyoung St, Marion, IL 629595884
Phone: 6189987000
NPI Identifier 1518915081
View Full Profile

Frequently Asked Questions about Internal Medicine in Marion

How do I check a Internal Medicine 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.

Other Specialties in Marion

Internal Medicine Providers in Other Illinois Cities

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