ERNEST F DEJESUS MD
NPI 1295737088
Internal Medicine - Nephrology in Winfield, IL

Q: What is Ernest Dejesus's NPI number?

The NPI number for Ernest Dejesus is 1295737088. It was assigned to this individual provider in the NPPES registry on August 11, 2005.

Q: What is Ernest Dejesus's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.

Q: When was this NPI record last updated?

The NPPES record for Ernest Dejesus was last updated on August 4, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.

Active since August 11, 2005PECOS Enrolled

25 WINFIELD ROAD, SUITE 414, WINFIELD, IL 60190(630) 690-1220(630) 690-5323 Get Directions Write a Review

NPPES record last updated: August 4, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Aug 4, 2025, Jan 25, 2023, May 27, 2022 and 2 more (5 updates tracked since 2019).

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About Ernest F Dejesus Md NPPES

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

ERNEST F DEJESUS MD (NPI 1295737088) is an individual nephrology provider in Winfield, Illinois, licensed in Illinois (036.109525) and active in the NPI registry since August 2005. He is enrolled in Medicare PECOS, is affiliated with Northwestern Medicine Delnor Community Hospital, and maintains a secondary practice location in Geneva.

NPPES Registry Identity

NPI1295737088

Entity TypeIndividualMale

Primary Taxonomy207RN0300X

Provider Legal NameERNEST F DEJESUSCredential: MD

Location Address25 WINFIELD ROAD, SUITE 414Winfield, IL 60190

Mailing Address120 W 22nd St, Ste 200Oak Brook, IL 60523-1563 · (630) 573-5000

Phone(630) 690-1220

Fax(630) 690-5323

Sole ProprietorNo

Medical School CMSOhio State University College Of MedicineGraduated 2000

Enumeration DateAugust 11, 2005

Last NPPES UpdateAugust 4, 20255 updates tracked since enumeration

NPPES CertifiedAugust 4, 2025

✔ NPI 1295737088 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · NephrologyAllopathic & Osteopathic Physicians

Taxonomy Code207RN0300X

License✔ Licensed in IL · 036.109525

Definition

An internist who treats disorders of the kidney, high blood pressure, fluid and mineral balance and dialysis of body wastes when the kidneys do not function. This specialist consults with surgeons about kidney transplantation.

25 WINFIELD ROAD, Winfield, IL 60190

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Secondary Practice Location 1

Location 1302 Randall RdGeneva, IL 60134-4209 · Phone (630) 690-1220 · Fax (630) 208-1667

Accepted Insurance

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

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Ernest F Dejesus Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID1052356763

PECOS Enrollment IDI20050623000129

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 Reassignments

Medicare enrollment records show Ernest Dejesus reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Willow Springs Surgery Center, LLC

7.1 mi

Ambulatory Surgical

2055 W ARMY TRAIL RD STE 110N
Addison, IL 60101

Reassigned Medicare billing, Illinois enrollment
9 clinicians in this Medicare group

NPI 1467429233 (773) 284-9247

Nephrology Associates Of Northern Illinois, Ltd.

12 mi

Nephrology

120 W 22ND ST
Oak Brook, IL 60523

Reassigned Medicare billing, Illinois enrollment
161 clinicians in this Medicare group

NPI 1134319924 (630) 573-5000

Nani-Ihp LLC

12 mi

Nephrology

120 W 22ND ST
Oak Brook, IL 60523

Reassigned Medicare billing, Illinois enrollment
15 clinicians in this Medicare group

NPI 1417376385 (630) 573-5000

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 23

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.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

915 services266 patients

Injection, epoetin alfa-epbx, biosimilar, (retacrit) (for non-esrd use), 1000 units Q5106

Epoetin alfa-epbx (Retacrit) is a biosimilar injection used for non-ESRD (End-Stage Renal Disease). It helps your body make more red blood cells, increasing your energy and well-being. It's usually given under the skin or into a vein by a healthcare professional.

680 services11 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233

Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.

435 services152 patients

Dialysis services, 4 or more physician visits per month (20 years or older) 90960

Dialysis is a treatment that filters and purifies your blood using a machine. It helps keep your fluids and electrolytes in balance when the kidneys can't do their job. This service includes 4 or more visits per month with a physician to monitor your health and adjust your treatment as needed.

269 services38 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.

197 services122 patients

Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223

Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.

169 services150 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.

153 services122 patients

Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222

Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.

151 services128 patients

Injection, midazolam hydrochloride, per 1 mg J2250

Midazolam hydrochloride is a medication injected to help you relax or sleep before surgery or certain medical procedures. It works by calming the brain and nerves. It's given in small doses, measured in milligrams (mg).

126 services47 patients

Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month 99490

Chronic care management services involve a healthcare professional directing clinical staff in managing your chronic conditions. This includes the first 20 minutes per month of services like medication management, care coordination, and health monitoring to help improve your health and quality of life.

83 services17 patients

Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes 99152

This procedure involves a doctor administering a medication to reduce your consciousness during a procedure. This helps in managing discomfort and anxiety. The initial application lasts for 15 minutes and is for individuals aged 5 years or older.

59 services49 patients

Home dialysis services per month (20 years or older) 90966

Home dialysis services provide kidney treatment for patients aged 20 or older right in their own homes. This service includes necessary equipment, supplies, and support for performing dialysis. It's a convenient option that allows patients to maintain their daily routines while receiving essential care.

58 services11 patients

Injection, fentanyl citrate, 0.1 mg J3010

Fentanyl citrate is a potent pain medication administered via injection. The 0.1 mg dosage is used to manage severe pain conditions. It works by blocking pain signals to the brain. It's crucial to follow the dosage instructions to prevent potential side effects.

46 services36 patients

Insertion of needle and/or tube into hemodialysis circuit and balloon dilation of dialysis segment with review by radiologist 36902

This procedure involves inserting a needle or tube into your hemodialysis circuit, a system that cleans your blood when your kidneys can't. A balloon is then used to widen a narrow section of this circuit. A radiologist reviews the procedure to ensure accuracy.

40 services35 patients

Use of a drug to induce depression of consciousness by physician performing a procedure, each additional 15 minutes 99153

This service involves a physician administering medication to lower your consciousness during a procedure. It's done for your comfort and safety. The drug's effects last about 15 minutes, so additional doses may be given as needed.

37 services18 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

37 services37 patients

Injection of drug or substance under skin or into muscle 96372

This procedure involves administering medication directly under the skin or into a muscle. A small needle is used to inject the drug, allowing it to be absorbed quickly into the bloodstream. It's a common method for delivering a variety of medications.

22 services11 patients

Review by radiologist of arm or leg artery image 75710

This procedure involves a radiologist examining images of your arm or leg arteries. These images are obtained through a non-invasive method, like an ultrasound or CT scan. The radiologist reviews these images to identify any abnormalities, such as blockages or narrowing, which can affect blood flow.

21 services15 patients

Dialysis services, 2-3 physician visits per month (20 years or older) 90961

Dialysis is a treatment that performs the function of healthy kidneys if they're not working properly. It removes waste and excess fluid from your blood. 2-3 physician visits per month are recommended for monitoring your health and adjusting your treatment as needed. This service is available for those aged 20 years and older.

18 services15 patients

Insertion of tube into chest or arm artery, each first order branch 36215

This procedure involves placing a thin tube into a chest or arm artery. It is done to monitor blood pressure, take blood samples, or deliver medications. The tube may also be inserted into each first order branch, which are the initial divisions of the main artery.

14 services11 patients

Replacement of tunneled central venous tube 36581

A tunneled central venous tube replacement is a procedure where an existing tube, used to deliver medication or nutrition directly to a large vein, is replaced. This is done under local anesthesia and involves inserting a new tube through a small incision.

14 services11 patients

Telephone medical discussion with physician, 5-10 minutes 99441

A telephone medical discussion with a physician is a brief, 5-10 minute call where you can discuss your health concerns. It's a convenient way to receive medical advice without needing to visit a clinic. It's important to prepare questions in advance to make the most of this time.

14 services13 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

11 services11 patients

Hospital Affiliations CMS Care Compare 3

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

Northwestern Medicine Delnor Community Hospital

Acute Care Hospitals · Geneva, IL

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number140211

Location300 Randall RdGeneva, IL 60134 · Kane County

Emergency services Birthing friendly

Northwestern Medicine Central Dupage Hospital

Acute Care Hospitals · Winfield, IL

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number140242

Location25 North Winfield RoadWinfield, IL 60190 · Du Page County

Emergency services Birthing friendly

Uchicago Medicine Adventhealth Glenoaks

Acute Care Hospitals · Glendale Heights, IL

3/5 CMS rating

OwnershipVoluntary non-profit - Other

CMS Certification Number140292

Location701 Winthrop AvenueGlendale Heights, IL 60139 · Du Page County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60190 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

$137.43 typical visit price

range $59.81 – $181.38

Typical copayment $34.35 (range $14.95 – $45.34)

Most-billed visit code 99204

Established Patient

$105.07 typical visit price

range $19.15 – $147.12

Typical copayment $26.26 (range $4.78 – $36.78)

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 8

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

Tacrolimus, extended release, (envarsus xr), oral, 0.25 mg J7503

Treatment-Chemotherapy · category RH002N

2 suppliers15 claims1,770 services$1.22 avg. paid by Medicare

Tacrolimus, immediate release, oral, 1 mg J7507

Treatment-Treatment - Miscellaneous · category RX029N

3 suppliers45 claims3,510 services$0.29 avg. paid by Medicare

Prednisone, immediate release or delayed release, oral, 1 mg J7512

Treatment-Treatment - Miscellaneous · category RX029N

2 suppliers19 claims2,850 services$0.01 avg. paid by Medicare

Mycophenolate mofetil, oral, 250 mg J7517

Treatment-Treatment - Miscellaneous · category RX029N

2 suppliers14 claims1,920 services$0.20 avg. paid by Medicare

Mycophenolic acid, oral, 180 mg J7518

Treatment-Treatment - Miscellaneous · category RX029N

3 suppliers30 claims5,700 services$0.96 avg. paid by Medicare

Sirolimus, oral, 1 mg J7520

Treatment-Treatment - Miscellaneous · category RX029N

1 supplier11 claims495 services$2.71 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 8

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

EXPRESSIVE HEALTHCARE SOLUTIONS, INC.

Music Therapist

25 WINFIELD ROAD
WINFIELD, IL 60190

Dupage County (630) 750-0670

LAURA S LING D.O.

Pediatrics

25 WINFIELD ROAD, CENTRAL DU PAGE HOSPITAL
WINFIELD, IL 60190

Dupage County (630) 933-1600

DAVID M GRGANTO MD

Family Medicine

25 WINFIELD ROAD
WINFIELD, IL 60190

Dupage County (630) 260-0600

MAURICE W BIRT MD

Family Medicine

25 WINFIELD ROAD
WINFIELD, IL 60190

Dupage County (630) 260-0600

STEPHEN LITTLETON MD

Internal Medicine (Critical Care Medicine)

25 WINFIELD ROAD
WINFIELD, IL 60190

Dupage County (630) 933-4700

STEPHANIE KLEBA MT-BC

Music Therapist

25 WINFIELD ROAD
WINFIELD, IL 60190

Dupage County (630) 750-0670

DAVID A COOKE MD

Internal Medicine (Cardiovascular Disease)

25 WINFIELD ROAD
WINFIELD, IL 60190

Dupage County (630) 933-4700

ANJU AGARWAL DO

Hospitalist

25 WINFIELD ROAD, 400
WINFIELD, IL 60190

Dupage County (630) 469-9200

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 Ernest Dejesus's NPI number?

The NPI number for Ernest Dejesus is 1295737088. It was assigned to this individual provider in the NPPES registry on August 11, 2005.

Where is Ernest Dejesus located?

Ernest Dejesus practices at 25 Winfield Road Suite 414, Winfield, IL 60190. The listed phone number is (630) 690-1220.

What is Ernest Dejesus's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.

Is Ernest Dejesus enrolled in Medicare?

Yes. Ernest Dejesus is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Ernest Dejesus's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Ernest Dejesus reassigns Medicare benefits to 3 organizations: Willow Springs Surgery Center, LLC (Addison, IL), Nephrology Associates Of Northern Illinois, Ltd. (Oak Brook, IL) and Nani-Ihp LLC (Oak Brook, IL). Each 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 Ernest Dejesus's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Ernest Dejesus accept?

Health plans from Ambetter Health, Ambetter Health of Delaware and Oscar Health list Ernest Dejesus 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 Ernest Dejesus affiliated with any hospitals?

According to CMS data, Ernest Dejesus is affiliated with Northwestern Medicine Delnor Community Hospital, Northwestern Medicine Central Dupage Hospital and Uchicago Medicine Adventhealth Glenoaks.

When was this NPI record last updated?

The NPPES record for Ernest Dejesus was last updated on August 4, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.