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ANN RENEE DAVIS MD
NPI 1528012846
Internal Medicine - Cardiovascular Disease in Naperville, IL

Active since May 20, 2006PECOS EnrolledAccepts Medicare Assignment
801 S WASHINGTON ST FL 4, NAPERVILLE, IL 60540(630) 600-0700(630) 600-0701 Get Directions Write a Review

NPPES record last updated: July 14, 2021. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Ann Renee Davis Md NPPES

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

ANN RENEE DAVIS MD (NPI 1528012846) is an individual cardiovascular disease provider in Naperville, Illinois, licensed in Illinois (036.088789) and active in the NPI registry since May 2006. She is enrolled in Medicare PECOS, is affiliated with Morris Hospital & Healthcare Centers, and is a graduate of Loyola University Of Chicago, Stritch School Of Medicine (1992).

NPPES Registry Identity

NPI1528012846
Entity TypeIndividualFemale
Primary Taxonomy207RC0000X
Provider Legal NameANN RENEE DAVISCredential: MD
Location Address801 S WASHINGTON ST FL 4Naperville, IL 60540-7430
Mailing Address801 S Washington St Fl 4Naperville, IL 60540-7430 · (630) 600-0700 · Fax (630) 600-0701
Phone(630) 600-0700
Fax(630) 600-0701
Sole ProprietorNo
Medical School CMSLoyola University Of Chicago, Stritch School Of MedicineGraduated 1992
Enumeration DateMay 20, 2006
Last NPPES UpdateJuly 14, 2021
NPPES CertifiedJuly 14, 2021
✔ NPI 1528012846 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Cardiovascular DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RC0000X
Licenses✔ Licensed in IL · 036.088789✔ Licensed in IL · 036088789
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.
801 S WASHINGTON ST FL 4, Naperville, IL 60540
Open in Google Maps ↗

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include 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 and accepts Medicare assignment

Ann Renee Davis 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 ID1355471590
PECOS Enrollment IDI20100614000716
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

6

Medicare enrollment records show Ann Davis reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Edward Hospital
Same address
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
Cardiovascular Institute Gpe Inc
0.1 mi
Cardiovascular Disease
10 MARTIN AVE STE 200
Naperville, IL 60540
  • Reassigned Medicare billing, Illinois enrollment
  • 61 clinicians in this Medicare group
NPI 1992594022 (630) 600-0700
Naperville Psychiatric Ventures
0.4 mi
Psychiatric Hospital
801 S WASHINGTON ST
Naperville, IL 60540
  • Reassigned Medicare billing, Illinois enrollment
  • 61 clinicians in this Medicare group
NPI 1871628362 (630) 305-5500
Central Dupage Hospital Association
7.7 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
Advocate Health And Hospitals Corporation
8.3 mi
Cardiovascular Disease
3825 HIGHLAND AVE, TOWER 2 SUITE 400
Downers Grove, IL 60515
  • Reassigned Medicare billing, Illinois enrollment
  • 4,870 clinicians in this Medicare group
NPI 1285903849 (630) 719-4799
Elmhurst Memorial Hospital
13 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

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 9

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.
892 services553 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.
158 services147 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.
158 services155 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.
114 services114 patients
Electrocardiogram (ecg) up to 30 days continuous with transmission of patient triggered events with review and report by health care professional 93229
An Electrocardiogram (ECG) is a test that records your heart's electrical activity for up to 30 days. You trigger a transmission if you feel symptoms, which is then reviewed by a healthcare professional. The report helps diagnose heart conditions.
55 services54 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.
21 services12 patients

Hospital Affiliations CMS Care Compare 5

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

Morris Hospital & Healthcare Centers

Acute Care Hospitals · Morris, IL
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140101
Location150 W High StMorris, IL 60450 · Grundy County
Emergency services Birthing friendly

Elmhurst Memorial Hospital

Acute Care Hospitals · Elmhurst, IL
4/5 CMS rating
OwnershipProprietary
CMS Certification Number140200
Location155 East Brush Hill RoadElmhurst, IL 60126 · Du Page County
Emergency services Birthing friendly

Edward Hospital

Acute Care Hospitals · Naperville, IL
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140231
Location801 South WashingtonNaperville, IL 60540 · Du Page 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

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 60540 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 8

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

MARIA ROSA COSTANZO MD
Internal Medicine (Advanced Heart Failure and Transplant Cardiology)
801 S WASHINGTON ST FL 4
NAPERVILLE, IL 60540
Dupage County (630) 600-0700
DR. KRISHNA NAGENDRAN MD
Internal Medicine (Interventional Cardiology)
801 S WASHINGTON ST FL 4
NAPERVILLE, IL 60540
Dupage County (630) 600-0700
SUZANNE L. WALLACE APN-CNP
Nurse Practitioner
801 S WASHINGTON ST FL 4
NAPERVILLE, IL 60540
Dupage County (630) 600-0700
RON M OREN MD
Internal Medicine (Advanced Heart Failure and Transplant Cardiology)
801 S WASHINGTON ST FL 4
NAPERVILLE, IL 60540
Dupage County (630) 600-0700
MRS. LAURA ANNE BADUR FNP-BC
Nurse Practitioner (Family)
801 S WASHINGTON ST FL 4
NAPERVILLE, IL 60540
Dupage County (630) 600-0700
ABIGAIL BINGHAM APRN
Nurse Practitioner (Acute Care)
801 S WASHINGTON ST FL 4
NAPERVILLE, IL 60540
Dupage County (630) 600-0700
ABDULLAH QUDDUS M.D.
Internal Medicine (Interventional Cardiology)
801 S WASHINGTON ST FL 4
NAPERVILLE, IL 60540
Dupage County (630) 600-0700
ERIN LYNN RIZZO FNP-BC
Nurse Practitioner (Family)
801 S WASHINGTON ST FL 4
NAPERVILLE, IL 60540
Dupage County (630) 600-0700

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 Ann Davis's NPI number?

The NPI number for Ann Davis is 1528012846. It was assigned to this individual provider in the NPPES registry on May 20, 2006.

Where is Ann Davis located?

Ann Davis practices at 801 S Washington St Fl 4, Naperville, IL 60540. The listed phone number is (630) 600-0700.

What is Ann Davis's specialty?

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

Is Ann Davis enrolled in Medicare?

Yes. Ann Davis 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 Ann Davis's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Ann Davis reassigns Medicare benefits to 6 organizations: Edward Hospital (Naperville, IL), Cardiovascular Institute Gpe Inc (Naperville, IL), Naperville Psychiatric Ventures (Naperville, IL), Central Dupage Hospital Association (Winfield, IL), Advocate Health And Hospitals Corporation (Downers Grove, IL) and 1 more organization, listed in the Medicare section above. 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 Ann Davis's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Ann Davis accept?

Health plans from Oscar Health list Ann Davis 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 Ann Davis affiliated with any hospitals?

According to CMS data, Ann Davis is affiliated with Morris Hospital & Healthcare Centers, Elmhurst Memorial Hospital, Edward Hospital, Northwestern Medicine Central Dupage Hospital and Advocate Good Samaritan Hospital.

When was this NPI record last updated?

The NPPES record for Ann Davis was last updated on July 14, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years 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.