DR. PATRICK CLINTON FENNER MD
NPI 1588616585
Internal Medicine - Cardiovascular Disease in Downers Grove, IL

Q: What is Patrick Fenner's NPI number?

The NPI number for Patrick Fenner is 1588616585. It was assigned to this individual provider in the NPPES registry on May 17, 2006.

Q: What is Patrick Fenner's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.

Q: When was this NPI record last updated?

The NPPES record for Patrick Fenner was last updated on July 8, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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 May 17, 2006PECOS EnrolledAccepts Medicare Assignment

3825 HIGHLAND AVE, TOWER 2 SUITE 400, DOWNERS GROVE, IL 60515(630) 719-4799 Get Directions Write a Review

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

Record update history: Jul 8, 2025, Sep 5, 2024, Dec 30, 2021 (3 updates tracked since 2021).

On this page

About Dr. Patrick Clinton Fenner Md NPPES

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

DR. PATRICK CLINTON FENNER MD (NPI 1588616585) is an individual cardiovascular disease provider in Downers Grove, Illinois, licensed in Illinois (036084061) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS, is affiliated with Uw Health, and is a graduate of Wayne State University School Of Medicine (1989).

NPPES Registry Identity

NPI1588616585

Entity TypeIndividualMale

Primary Taxonomy207RC0000X

Provider Legal NameDR. PATRICK CLINTON FENNERCredential: MD

Location Address3825 HIGHLAND AVE, TOWER 2 SUITE 400Downers Grove, IL 60515-1552

Mailing Address29373 Network PlChicago, IL 60673-1293

Phone(630) 719-4799

Sole ProprietorNo

Medical School CMSWayne State University School Of MedicineGraduated 1989

Enumeration DateMay 17, 2006

Last NPPES UpdateJuly 8, 20253 updates tracked since enumeration

NPPES CertifiedJuly 8, 2025

✔ NPI 1588616585 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Cardiovascular DiseaseAllopathic & Osteopathic Physicians

Taxonomy Code207RC0000X

License✔ Licensed in IL · 036084061

Definition

An internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threatening, abnormal heartbeat rhythms.

3825 HIGHLAND AVE, Downers Grove, IL 60515

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Other Identifiers 2

Medicaid036084061IL

Other060069163Railroad Medicare

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

Dr. Patrick Clinton Fenner 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 ID3173513793

PECOS Enrollment IDI20040515000344

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 Patrick Fenner reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Elmhurst Memorial Hospital

4.7 mi

General Acute Care Hospital

155 E BRUSH HILL RD
Elmhurst, IL 60126

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

NPI 1548306343 (331) 221-1000

Edward Hospital

8.3 mi

General Acute Care Hospital

801 S WASHINGTON ST
Naperville, IL 60540

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

NPI 1013969013 (630) 655-0450

Central Dupage Hospital Association

8.7 mi

General Acute Care Hospital

25 NORTH WINFIELD RD.
Winfield, IL 60190

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

NPI 1003864810 (630) 933-1600

Swedishamerican Hospital

37 mi

Psychiatry

920 W PRAIRIE DR, UNIT F
Sycamore, IL 60178

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

NPI 1528234242 (815) 889-0339

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 25

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.

Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only 93010

A routine electrocardiogram (ECG) with 12 leads is a simple, non-invasive test that records the electrical activity of your heart. It helps in identifying heart conditions by detecting irregularities in your heart rhythms. The results are interpreted and a report is provided.

704 services566 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.

277 services206 patients

Injection, regadenoson, 0.1 mg J2785

Regadenoson injection, 0.1 mg, is a medication used to help visualize the heart during a stress test. It works by increasing blood flow in the arteries of the heart. It's injected into a vein and is generally well-tolerated.

252 services62 patients

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.

251 services196 patients

Technetium tc-99m tetrofosmin, diagnostic, per study dose A9502

Technetium Tc-99m Tetrofosmin is a radiopharmaceutical used in diagnostic imaging. It helps highlight areas of concern in the heart by emitting signals captured by a special camera. This assists doctors in detecting heart conditions.

237 services118 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.

136 services124 patients

Ultrasound of heart with color-depicted blood flow, rate, direction and valve function 93306

This is a heart ultrasound, also known as an echocardiogram. It uses sound waves to create pictures of your heart, showing how blood flows through it. The color depicts the blood flow's speed and direction. It also checks the heart's valves to ensure they're working properly.

122 services121 patients

Exercise or drug-induced heart stress test with electrocardiogram (ecg) with supervision and review by physician 93015

An exercise or drug-induced heart stress test with ECG is a procedure performed by a doctor to assess how your heart responds to exertion. It involves monitoring your heart's electrical activity while you exercise or after medication is given to mimic exercise effects.

120 services119 patients

Nuclear medicine studies of heart muscle at rest and with stress and spect 78452

Nuclear medicine studies of the heart involve two parts: rest and stress. During rest, images are taken of your heart at ease. During stress, images are taken after exercise or medication-induced stress. SPECT is a special imaging technique providing 3D pictures of your heart, helping identify any issues.

117 services116 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.

114 services78 patients

Insertion of needle into vein for collection of blood sample 36415

This procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.

106 services75 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.

82 services81 patients

Ultrasound of heart with color-depicted blood flow, rate, direction and valve function 93306

80 services78 patients

Exercise or drug-induced heart stress test with electrocardiogram (ecg) with supervision by physician 93016

An exercise or drug-induced heart stress test with ECG involves monitoring your heart's activity while it's under stress, either from exercise or medication. A doctor supervises the entire procedure to ensure safety and accuracy in results. This test helps detect heart problems.

61 services61 patients

Exercise or drug-induced heart stress test with electrocardiogram (ecg) with review by physician 93018

An exercise or drug-induced heart stress test with ECG is a procedure to assess how your heart functions under stress. It can involve exercising or medication to make your heart work harder while an ECG records its activity. A physician reviews the results.

61 services61 patients

Nuclear medicine studies of heart muscle at rest and with stress and spect 78452

50 services50 patients

3d radiographic procedure 76376

A 3D radiographic procedure is a non-invasive imaging test that helps doctors visualize the internal structures of your body in three dimensions. This advanced technology provides detailed images, aiding in accurate diagnosis and treatment planning. It involves exposure to minimal radiation.

37 services37 patients

New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205

This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.

37 services37 patients

3d radiographic procedure 76376

32 services31 patients

Ultrasound of heart, follow-up 93308

A follow-up ultrasound of the heart, also known as an echocardiogram, is a non-invasive test that uses sound waves to create images of your heart. It helps doctors monitor your heart's function and structures after initial assessment or treatment.

27 services27 patients

Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report 93000

An electrocardiogram (ECG) is a non-invasive test that records your heart's electrical activity. Using 12 leads attached to your body, it captures data to help identify heart conditions. A doctor interprets the results and provides a report.

26 services25 patients

Ultrasound of heart blood flow, valves and chambers, follow-up 93321

This procedure, an echocardiogram, uses sound waves to create images of your heart. It aids in assessing your heart's blood flow, chambers, and valves. It's a follow-up procedure, ensuring that your heart is functioning properly post-treatment.

26 services26 patients

Ultrasound of heart with color-depicted blood flow, rate and valve function 93325

An ultrasound of the heart, also known as an echocardiogram, uses sound waves to create pictures of your heart. It shows the structure, movement, and blood flow within your heart. This helps assess the heart's health and function, including the valves and rate.

26 services26 patients

Heart muscle strain imaging 93356

Heart muscle strain imaging is a non-invasive test that uses sound waves to create pictures of your heart. It helps doctors evaluate how well your heart muscle is working and detect any damage or disease. This can aid in diagnosing heart conditions and guiding treatment plans.

19 services19 patients

Heart muscle strain imaging 93356

15 services15 patients

Hospital Affiliations CMS Care Compare 2

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

Uw Health

Acute Care Hospitals · Rockford, IL

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number140228

Location1401 East State StreetRockford, IL 61104 · Winnebago County

Emergency services Birthing friendly

Advocate Good Samaritan Hospital

Acute Care Hospitals · Downers Grove, IL

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number140288

Location3815 Highland AvenueDowners Grove, IL 60515 · Du Page County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60515 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

$74.38 typical visit price

range $19.15 – $147.12

Typical copayment $18.59 (range $4.78 – $36.78)

Most-billed visit code 99213

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

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.

PETER MICHAEL KERWIN MD

Internal Medicine (Interventional Cardiology)

3825 HIGHLAND AVE, TOWER 2 SUITE 400
DOWNERS GROVE, IL 60515

Dupage County (630) 719-4799

BARRY SADEGI M.D.

Obstetrics & Gynecology (Maternal & Fetal Medicine)

3825 HIGHLAND AVE, 3B
DOWNERS GROVE, IL 60515

Dupage County (630) 434-9300

STEPHEN MICHAEL ROWLEY MD

Internal Medicine (Cardiovascular Disease)

3825 HIGHLAND AVE, TOWER 2 SUITE 400
DOWNERS GROVE, IL 60515

Dupage County (630) 719-4799

DR. KOTESWARA RAO BATCHU M.D.

Legal Medicine

3825 HIGHLAND AVE, SUITE 4B
DOWNERS GROVE, IL 60515

Dupage County (630) 963-4990

BARRY SADEGI, M.D., S.C.

Obstetrics & Gynecology

3825 HIGHLAND AVE, 3B
DOWNERS GROVE, IL 60515

Dupage County (630) 434-9300

DR. PAUL J WEST M.D.

Urology

3825 HIGHLAND AVE, SUITE 207
DOWNERS GROVE, IL 60515

Dupage County (630) 960-1498

DR. CYNTHIA ANN WOLLENSCHLAGER M.D.

Internal Medicine (Infectious Disease)

3825 HIGHLAND AVE, TOWER I, SUITE 3F
DOWNERS GROVE, IL 60515

Dupage County (630) 971-9275

MATTHEW OSCEOLA NORA MD

Internal Medicine (Clinical Cardiac Electrophysiology)

3825 HIGHLAND AVE, TOWER 2 SUITE 400
DOWNERS GROVE, IL 60515

Dupage County (630) 719-4799

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 Patrick Fenner's NPI number?

The NPI number for Patrick Fenner is 1588616585. It was assigned to this individual provider in the NPPES registry on May 17, 2006.

Where is Patrick Fenner located?

Patrick Fenner practices at 3825 Highland Ave Tower 2 Suite 400, Downers Grove, IL 60515. The listed phone number is (630) 719-4799.

What is Patrick Fenner's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.

Is Patrick Fenner enrolled in Medicare?

Yes. Patrick Fenner 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 organizations bill Medicare for Patrick Fenner's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Patrick Fenner reassigns Medicare benefits to 4 organizations: Elmhurst Memorial Hospital (Elmhurst, IL), Edward Hospital (Naperville, IL), Central Dupage Hospital Association (Winfield, IL) and Swedishamerican Hospital (Sycamore, 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 Patrick Fenner's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Patrick Fenner affiliated with any hospitals?

According to CMS data, Patrick Fenner is affiliated with Uw Health and Advocate Good Samaritan Hospital.

When was this NPI record last updated?

The NPPES record for Patrick Fenner was last updated on July 8, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.