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WILLIAM NATHAN BARGE MD
NPI 1790245959
Internal Medicine in Chicago, IL

Active since March 23, 2019PECOS EnrolledAccepts Medicare Assignment
87.08/100
CMS Quality Rating
1801 W TAYLOR ST # 3AA, CHICAGO, IL 60612(312) 413-3627 Get Directions Write a Review

NPPES record last updated: January 8, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jan 8, 2025, Nov 3, 2023, Mar 23, 2019 (3 updates tracked since 2019).

About William Nathan Barge Md NPPES

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

WILLIAM NATHAN BARGE MD (NPI 1790245959) is an individual internal medicine provider in Chicago, Illinois, licensed in Illinois (036165351) and active in the NPI registry since March 2019. He is enrolled in Medicare PECOS, is affiliated with University Of Illinois Hospital And Clinics, and is a graduate of University Of Illinois College Of Med (chi/peor/rock/chm-urb) (2019).

NPPES Registry Identity

NPI1790245959
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameWILLIAM NATHAN BARGECredential: MD
Location Address1801 W TAYLOR ST # 3AAChicago, IL 60612-4795
Mailing Address231 Albert Sabin Way # 0535Cincinnati, OH 45267-0535 · (513) 584-0397 · Fax (513) 584-0369
Phone(312) 413-3627
Sole ProprietorNo
Medical School CMSUniversity Of Illinois College Of Med (chi/peor/rock/chm-urb)Graduated 2019
Enumeration DateMarch 23, 2019
Last NPPES UpdateJanuary 8, 20253 updates tracked since enumeration
NPPES CertifiedJanuary 8, 2025
✔ NPI 1790245959 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in IL · 036165351
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.
Also ListedPediatricsTaxonomy 208000000X · License 036165351 (IL)
1801 W TAYLOR ST # 3AA, Chicago, IL 60612
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

William Nathan Barge Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID8426383779
PECOS Enrollment IDI20231113001193
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.

Medicare Billing Reassignment

Medicare enrollment records show William Barge reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Board Of Trustees Of The University Of Illinois
Same address
Radiation Oncology
1801 W TAYLOR ST
Chicago, IL 60612
  • Reassigned Medicare billing, Illinois enrollment
  • 2,127 clinicians in this Medicare group
NPI 1669691788 (312) 413-7501

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 3

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
166 services129 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
20 services16 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
18 services17 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

University Of Illinois Hospital And Clinics

Acute Care Hospitals · Chicago, IL
2/5 CMS rating
OwnershipGovernment - State
CMS Certification Number140150
Location1740 West Taylor St Suite 1400Chicago, IL 60612 · Cook County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60612 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.

87.08/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality70.79
Promoting Interoperability100
Improvement Activities40
Cost52.82

Other Providers at the Same Location NPPES

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

EUNA CHI MD
Internal Medicine
1801 W TAYLOR ST # 3AA
CHICAGO, IL 60612
Cook County (312) 413-3627

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is William Barge's NPI number?

The NPI number for William Barge is 1790245959. It was assigned to this individual provider in the NPPES registry on March 23, 2019.

Where is William Barge located?

William Barge practices at 1801 W Taylor St # 3aa, Chicago, IL 60612. The listed phone number is (312) 413-3627.

What is William Barge's specialty?

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

Is William Barge enrolled in Medicare?

Yes. William Barge is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organization bills Medicare for William Barge's services?

According to the CMS Revalidation Reassignment List (October 2026 release), William Barge reassigns Medicare benefits to Board Of Trustees Of The University Of Illinois (Chicago, IL). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for William Barge's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is William Barge affiliated with any hospitals?

According to CMS data, William Barge is affiliated with University Of Illinois Hospital And Clinics.

When was this NPI record last updated?

The NPPES record for William Barge was last updated on January 8, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 21 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.