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MICHAEL J. HARTMANN MD
NPI 1013073253
Emergency Medicine in Naperville, IL

Active since December 30, 2006PECOS Enrolled
801 S WASHINGTON ST, NAPERVILLE, IL 60540(630) 527-3000 Get Directions Write a Review

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

Record update history: Nov 25, 2025, Jul 24, 2018 (2 updates tracked since 2018).

About Michael J. Hartmann Md NPPES

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

MICHAEL J. HARTMANN MD (NPI 1013073253) is an individual emergency medicine provider in Naperville, Illinois, licensed in Illinois (036109982) and active in the NPI registry since December 2006. He is enrolled in Medicare PECOS and maintains a secondary practice location in Janesville.

NPPES Registry Identity

NPI1013073253
Entity TypeIndividualMale
Primary Taxonomy207P00000X
Provider Legal NameMICHAEL J. HARTMANNCredential: MD
Location Address801 S WASHINGTON STNaperville, IL 60540-7430
Mailing Address1000 Mineral Point AveJanesville, WI 53548-2940 · (608) 756-6111 · Fax (608) 756-6177
Phone(630) 527-3000
Sole ProprietorNo
Enumeration DateDecember 30, 2006
Last NPPES UpdateNovember 25, 20252 updates tracked since enumeration
NPPES CertifiedNovember 25, 2025
✔ NPI 1013073253 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
Licenses✔ Licensed in IL · 036109982✔ Licensed in WI · 60901-20
Definition
An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.
801 S WASHINGTON ST, Naperville, IL 60540
Open in Google Maps ↗

Secondary Practice Location 1

Location 11000 Mineral Point AveJanesville, WI 53548 · Phone (608) 756-6111 · Fax (608) 756-6177

Other Identifiers 5

OtherHARTMMI4WI · Mercycare Insurance
Other1013073253WI · Bcbswi
Medicaid1013073253WI
Other000054176-K400095937WI · Wi Medicare
Medicaid036109982IL

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Michael J. Hartmann Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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

3

Medicare enrollment records show Michael Hartmann reassigns Medicare billing to 3 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
Endeavor Health Medical Group
32 mi
Allergy & Immunology
1000 CENTRAL ST
Evanston, IL 60201
  • Reassigned Medicare billing, Illinois enrollment
  • 4,841 clinicians in this Medicare group
NPI 1497701882 (847) 570-5235
Mercy Health System Corporation
78 mi
Multi-Specialty
580 N WASHINGTON ST
Janesville, WI 53548
  • Reassigned Medicare billing, Wisconsin enrollment
  • 1,155 clinicians in this Medicare group
NPI 1598718603 (608) 741-7630

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 5

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.

Emergency department visit with high level of medical decision making 99285
An emergency department visit for severe conditions is when you urgently seek medical help due to serious health issues. These could be severe injuries, breathing problems, unbearable pain, or sudden severe illness. Doctors and nurses will provide immediate care to stabilize your condition.
328 services312 patients
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.
315 services268 patients
Emergency department visit with moderate level of medical decision making 99284
An emergency department visit for a high-severity issue means you're experiencing a serious health problem that needs immediate attention. This could be a severe injury, serious illness, or life-threatening condition. Medical professionals will provide urgent care to stabilize your condition.
83 services83 patients
Critical care, first 30-74 minutes 99291
Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.
41 services41 patients
Emergency department visit with low level of medical decision making 99283
An emergency department visit for a problem of moderate severity involves immediate medical attention for issues like minor fractures, burns, or high fever. The healthcare team will assess your condition, provide necessary treatment, and may suggest further tests or admission if required.
26 services26 patients

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
$93.02 typical visit price
range $59.81 – $181.38
Typical copayment $23.25 (range $14.95 – $45.34)
Most-billed visit code 99203
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.

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.

DR. HAFEZ M. SAMI M.D.
Pain Medicine (Interventional Pain Medicine)
801 S WASHINGTON ST
NAPERVILLE, IL 60540
Dupage County (630) 348-3300
SEEMA ISHAQ JEELANI D.O.
Emergency Medicine
801 S WASHINGTON ST
NAPERVILLE, IL 60540
Dupage County (630) 527-3000
CORTNEY COLE MD
Family Medicine (Hospice and Palliative Medicine)
801 S WASHINGTON ST
NAPERVILLE, IL 60540
Dupage County (630) 527-3000
EDWARD HOSPITAL
General Acute Care Hospital
801 S WASHINGTON ST
NAPERVILLE, IL 60540
Dupage County (630) 655-0450
DR. HODA A. EL- ASMAR MD
Internal Medicine (Infectious Disease)
801 S WASHINGTON ST, EDWARD HOSPITAL, ADMINISTRATION, VPMA OFFICE
NAPERVILLE, IL 60540
Dupage County (630) 527-5647
AMAAR MASOOD MALIK DO
Radiology (Diagnostic Radiology)
801 S WASHINGTON ST
NAPERVILLE, IL 60540
Dupage County (630) 527-3200
DR. SANGITA RANGALA M.D.
Emergency Medicine
801 S WASHINGTON ST
NAPERVILLE, IL 60540
Dupage County (630) 527-3288
MRS. KIRSTI ROSE WILLIS APN
Nurse Practitioner
801 S WASHINGTON ST
NAPERVILLE, IL 60540
Dupage County (630) 527-3000

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 Michael Hartmann's NPI number?

The NPI number for Michael Hartmann is 1013073253. It was assigned to this individual provider in the NPPES registry on December 30, 2006.

Where is Michael Hartmann located?

Michael Hartmann practices at 801 S Washington St, Naperville, IL 60540. The listed phone number is (630) 527-3000.

What is Michael Hartmann's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Is Michael Hartmann enrolled in Medicare?

Yes. Michael Hartmann is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Michael Hartmann's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Michael Hartmann reassigns Medicare benefits to 3 organizations: Edward Hospital (Naperville, IL), Endeavor Health Medical Group (Evanston, IL) and Mercy Health System Corporation (Janesville, WI). 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 Michael Hartmann's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Michael Hartmann was last updated on November 25, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.