Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. NIROSUTHAN RAJASINGAM MD
NPI 1790125474
Internal Medicine in Chicago, IL

Q: What is Nirosuthan Rajasingam's NPI number?

The NPI number for Nirosuthan Rajasingam is 1790125474. It was assigned to this individual provider in the NPPES registry on June 26, 2013.

Q: What is Nirosuthan Rajasingam's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Active since June 26, 2013PECOS Enrolled

80.83/100

CMS Quality Rating

1500 S FAIRFIELD AVE, AP, CHICAGO, IL 60608(773) 542-2000 Get Directions Write a Review

NPPES record last updated: August 14, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Aug 14, 2026, Jul 30, 2026 (2 updates tracked since 2026).

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About Dr. Nirosuthan Rajasingam Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. NIROSUTHAN RAJASINGAM MD (NPI 1790125474) is an individual internal medicine provider in Chicago, Illinois, licensed in Illinois (036141000) and active in the NPI registry since June 2013. He is enrolled in Medicare PECOS and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1790125474

Entity TypeIndividualMale

Primary Taxonomy207R00000X

Provider Legal NameDR. NIROSUTHAN RAJASINGAMCredential: MD

Location Address1500 S FAIRFIELD AVE, APChicago, IL 60608-1782

Mailing Address555 E 33rd Pl Apt 504Chicago, IL 60616-4175 · (630) 456-8661

Phone(773) 542-2000

Sole ProprietorNo

Enumeration DateJune 26, 2013

Last NPPES UpdateAugust 14, 20262 updates tracked since enumeration

NPPES CertifiedAugust 14, 2026

✔ NPI 1790125474 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207R00000X

License✔ Licensed in IL · 036141000

Definition

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

1500 S FAIRFIELD AVE, Chicago, IL 60608

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Secondary Practice Locations 2

Location 11045 W Stephenson StFreeport, IL 61032-4864 · Phone (815) 599-6000

Location 21036 W Stephenson StFreeport, IL 61032-4865 · Phone (815) 599-6000

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Nirosuthan Rajasingam Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60608 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$138.86 typical visit price

range $60.08 – $183.39

Typical copayment $34.71 (range $15.02 – $45.84)

Most-billed visit code 99204

Established Patient

$105.70 typical visit price

range $18.97 – $148.12

Typical copayment $26.42 (range $4.74 – $37.03)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

80.83/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored as part of a group practice

Quality

64.96

Promoting Interoperability

Improvement Activities

Cost

63.15

Referred Medical Equipment & Supplies CMS DME claims 2

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Portable gaseous oxygen system, rental; includes portable container, regulator, flowmeter, humidifier, cannula or mask, and tubing E0431

DME-Oxygen and Supplies · category DC000N

1 supplier29 claims29 services$14.14 avg. paid by Medicare

Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate E1390

DME-Oxygen and Supplies · category DC002N

1 supplier29 claims29 services$59.99 avg. paid by Medicare

Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

AUDREY SHAE WHITNAH

Pharmacist