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DR. ERNESTO J VILLEGAS M.D.
NPI 1871634774
Internal Medicine in Chicago, IL

Active since February 12, 2007PECOS EnrolledAccepts Medicare Assignment
311 N ABERDEEN ST, STE 100B, CHICAGO, IL 60607(312) 733-0909(312) 733-0908 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Dr. Ernesto J Villegas M.d. NPPES

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

DR. ERNESTO J VILLEGAS M.D. (NPI 1871634774) is an individual internal medicine provider in Chicago, Illinois and active in the NPI registry since February 2007. He is enrolled in Medicare PECOS, is affiliated with Rush University Medical Center, and is a graduate of Stanford University School Of Medicine (1985).

NPPES Registry Identity

NPI1871634774
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. ERNESTO J VILLEGASCredential: M.D.
Location Address311 N ABERDEEN ST, STE 100BChicago, IL 60607-1249
Mailing Address311 N Aberdeen St, Ste 100bChicago, IL 60607-1249 · (312) 733-0909 · Fax (312) 733-0908
Phone(312) 733-0909
Fax(312) 733-0908
Sole ProprietorNo
Medical School CMSStanford University School Of MedicineGraduated 1985
Enumeration DateFebruary 12, 2007
Last NPPES UpdateJuly 8, 2007
✔ NPI 1871634774 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
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.
311 N ABERDEEN ST, Chicago, IL 60607
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Other Identifiers 2

Other01636562IL · Blue Cross Blue Shield
Medicare UPINE23671IL

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Home State Health, Ambetter Health, Ambetter Health of Delaware.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Ernesto J Villegas M.d. 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 ID3072743210
PECOS Enrollment IDI20140307001086
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.

Areas of Expertise CMS Part B claims 8

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 high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
75 services53 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.
46 services34 patients
Remote monitoring of physiologic parameters, initial supply of devices with daily recordings or programmed alerts transmission, each 30 days 99454
This service involves using devices to remotely track body functions like heart rate or blood pressure. These devices, provided initially, record data daily or send alerts if readings are abnormal. The service is renewed every 30 days.
36 services11 patients
Management using the results of remote vital sign monitoring per calendar month, first 20 minutes 99457
This service involves reviewing and managing your health data, which is remotely monitored and collected. Your vital signs like heart rate and blood pressure are tracked regularly throughout the month. The first 20 minutes of this data analysis per month is included in this service.
27 services12 patients
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439
An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.
27 services27 patients
Administration of influenza virus vaccine G0008
The administration of the influenza virus vaccine, also known as the flu shot, is a simple procedure to protect against the flu. A healthcare provider injects a small dose of the vaccine into your arm. This stimulates your immune system to produce antibodies, which will help your body fight off the flu if exposed.
13 services13 patients

Hospital Affiliations CMS Care Compare

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

Rush University Medical Center

Acute Care Hospitals · Chicago, IL
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140119
Location1653 West Congress ParkwayChicago, IL 60612 · Cook County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60607 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.

Referred Medical Equipment & Supplies CMS DME claims 3

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

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253
DME-Other DME · category DE017N
5 suppliers11 claims28 services$6.60 avg. paid by Medicare
Lancets, per box of 100 A4259
DME-Medical/Surgical Supplies · category DA000N
6 suppliers13 claims19 services$1.12 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
2 suppliers13 claims19 services$67.73 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 3

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

RESPECT CARE, INC.
In Home Supportive Care
311 N ABERDEEN ST, SUITE 200A
CHICAGO, IL 60607
Cook County (312) 615-6666
MR. RAJESH CHATTERGOON APN
Nurse Practitioner
311 N ABERDEEN ST, SUITE 100B
CHICAGO, IL 60607
Cook County (312) 733-0909
ERNESTO J. VILLEGAS MD, SC
Clinic/Center (Primary Care)
311 N ABERDEEN ST, SUITE 100-B
CHICAGO, IL 60607
Cook County (312) 733-0909

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 Ernesto Villegas's NPI number?

The NPI number for Ernesto Villegas is 1871634774. It was assigned to this individual provider in the NPPES registry on February 12, 2007.

Where is Ernesto Villegas located?

Ernesto Villegas practices at 311 N Aberdeen St Ste 100B, Chicago, IL 60607. The listed phone number is (312) 733-0909.

What is Ernesto Villegas's specialty?

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

Is Ernesto Villegas enrolled in Medicare?

Yes. Ernesto Villegas 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.

What insurance does Ernesto Villegas accept?

Health plans from Ambetter Health, Ambetter Health of Delaware and Ambetter from Home State Health list Ernesto Villegas as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Ernesto Villegas affiliated with any hospitals?

According to CMS data, Ernesto Villegas is affiliated with Rush University Medical Center.

When was this NPI record last updated?

The NPPES record for Ernesto Villegas was last updated on July 8, 2007. NPI Profile syncs with the weekly NPPES data releases published by CMS.