Dr. Michael J. Hartmann , MD
Emergency Medicine โข Naperville, IL
801 S Washington St
Naperville, IL 605407430
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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Dr. Michael Hartmann is listed in NPPES under Emergency Medicine.
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NPI assigned on December 30, 2006; this date does not establish years in practice.
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Published CMS data list 793 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- 99285 โ Emergency department visit with high level of medical decision making: 328 service units.
- 93010 โ Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only: 315 service units.
- 99284 โ Emergency department visit with moderate level of medical decision making: 83 service units.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPTยฎ only copyright 2023 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2024). CPT notice
See all 5 records in the table ยท Guide: How to read Medicare Part B data
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Published CMS data list 140 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Cephalexin โ 36 prescription fills, including refills.
- Ondansetron Odt (Ondansetron) โ 33 prescription fills, including refills.
- Hydrocodone-Acetaminophen (Hydrocodone/Acetaminophen) โ 31 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 6 records in the table ยท Guide: How to read Medicare Part D prescriber data
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More Medicare Part B services than 70% of clinicians listed under Emergency Medicine in Naperville, IL (2024, 53 clinicians with data). Median for this group: 608. Middle half: 405 to 796.
More Medicare Part B services than 90% of clinicians listed under Emergency Medicine in Illinois (2024, 2,100 clinicians with data). Median for this group: 321. Middle half: 179 to 524.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 938 in 2020 to 793 in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2020โ2024.
Practice Location & Contact Primary Location
801 S Washington St
Naperville, IL 605407430
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
NPPES lists 1 additional practice-address record in Janesville, WI. See the list
Source: CMS NPPES NPI Registry, practice location records; release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
What Public CMS Data Show
Emergency Medicine: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
459 people with Original Medicare in 2024
It gives a sense of how many people with Medicare this clinician treated that year.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider, 2024.
Medicare-allowed amount
About $82,167 in 2024
The total amount Medicare approved for these services in 2024. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.
It shows the total cost of this clinician's Original Medicare services under Medicare's fee rules.
What this does not show: Medicare-allowed amount
This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024.
Paid by Medicare
About $62,031 in 2024
The part of the Medicare-allowed amount that Medicare itself paid in 2024, after patients' deductibles and coinsurance.
The gap between the allowed amount and this number is roughly what patients and their other insurance paid.
What this does not show: Paid by Medicare
This is not the clinician's income and not a measure of quality.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024.
30-day fills
140 standardized 30-day fills in 2024
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$733 in 2024
The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024.
Industry payments (Open Payments)
Fewer than 11 payment records totaling $19.54 in 2023
Drug and medical device companies must report certain payments to doctors and some other clinicians to CMS, such as meals, travel, speaking fees or research funding.
It shows reported financial ties between this clinician and companies. You can ask your clinician about them.
These records are submitted by drug and medical device companies, and a reported payment does not necessarily mean the financial relationship is improper.
General: payments not tied to research, such as meals, travel, consulting or speaking fees.
A reported payment does not necessarily mean the financial relationship is improper. Research payments can go to a hospital or university for a study the clinician leads, not to the clinician personally. Clinicians can dispute records with the company that reported them.
Source: CMS Open Payments, program year 2023.
NPI first issued
2006
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Medicare assignment not listed
CMS data do not show whether this clinician accepts Medicare assignment. This does not mean they do not accept Medicare. Ask the office.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, โDoes your provider accept Medicare as full payment?โ
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
Dr. Hartmann has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Dr. Hartmann as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Naperville and Illinois
Billing and prescribing volume is not a quality rating.
Medicare Part B services
More Medicare Part B services than 70% of clinicians listed under Emergency Medicine in Naperville, IL (2024, 53 clinicians with data). Median for this group: 608. Middle half: 405 to 796.
More Medicare Part B services than 90% of clinicians listed under Emergency Medicine in Illinois (2024, 2,100 clinicians with data). Median for this group: 321. Middle half: 179 to 524.
Medicare-allowed amount
A higher Medicare-allowed amount than 65% of clinicians listed under Emergency Medicine in Naperville, IL (2024, 53 clinicians with data). Median for this group: $70,805. Middle half: $40,995 to $88,244.
A higher Medicare-allowed amount than 80% of clinicians listed under Emergency Medicine in Illinois (2024, 2,100 clinicians with data). Median for this group: $45,108. Middle half: $24,677 to $72,172.
Paid by Medicare
A higher Medicare payment amount than 65% of clinicians listed under Emergency Medicine in Naperville, IL (2024, 53 clinicians with data). Median for this group: $53,354. Middle half: $31,459 to $67,480.
A higher Medicare payment amount than 80% of clinicians listed under Emergency Medicine in Illinois (2024, 2,100 clinicians with data). Median for this group: $34,329. Middle half: $18,565 to $55,341.
Medicare Part D prescriptions
Close to the middle for clinicians listed under Emergency Medicine in Naperville, IL (2024, 50 clinicians with data). Median for this group: 147. Middle half: 89 to 204.
More Part D prescriptions than 70% of clinicians listed under Emergency Medicine in Illinois (2024, 1,650 clinicians with data). Median for this group: 80. Middle half: 32 to 154.
Part D drug cost
Close to the middle for clinicians listed under Emergency Medicine in Naperville, IL (2024, 50 clinicians with data). Median for this group: $755. Middle half: $387 to $1,097.
A higher Part D drug cost than 65% of clinicians listed under Emergency Medicine in Illinois (2024, 1,650 clinicians with data). Median for this group: $440. Middle half: $171 to $1,010.
59 active clinicians are listed under Emergency Medicine with a practice address in Naperville, IL (3,297 in Illinois).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Naperville
0% of these 59 clinicians have the CMS telehealth indicator.
69.5% of these 59 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part B services
Medicare Part B services decreased 15% from 938 in 2020 to 793 in 2024.
- 2020: 938
- 2021: 1,059
- 2022: 976
- 2023: 1,014
- 2024: 793
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Medicare-allowed amount
Medicare-allowed amount decreased 18% from $100,768 in 2020 to $82,167 in 2024.
- 2020: $100,768
- 2021: $111,474
- 2022: $103,305
- 2023: $111,319
- 2024: $82,167
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Paid by Medicare
Paid by Medicare decreased 27% from $85,265 in 2020 to $62,031 in 2024.
- 2020: $85,265
- 2021: $100,699
- 2022: $94,047
- 2023: $91,808
- 2024: $62,031
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 61% from 87 in 2020 to 140 in 2024.
- 2020: 87
- 2021: 126
- 2022: 149
- 2023: 169
- 2024: 140
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30-day fills
30-day fills increased 61% from 87 in 2020 to 140 in 2024.
- 2020: 87
- 2021: 126
- 2022: 149
- 2023: 170
- 2024: 140
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Part D drug cost
Part D drug cost went from $643 in 2020 to $733 in 2024.
- 2020: $643
- 2021: $1,021
- 2022: $1,047
- 2023: $1,113
- 2024: $733
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $15.67 in 2019 to $19.54 in 2023.
- 2019: $15.67
- 2022: $304.73
- 2023: $19.54
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Open Payments (2023), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo ยท Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2023 (payments made January 1 โ December 31, 2023): fewer than 11 records totaling $19.54.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| AstraZeneca Pharmaceuticals LP |
Food and Beverage
In-kind items and services
|
ANDEXXA | General | $19.54 |
Source: CMS Open Payments, program year 2023, released June 30, 2026.
Performed Procedures & Service Volume
CPTยฎ is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016โ2023 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners โ by Provider and Service data, 2017โ2024; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.
| HCPCS Code | Services | Patients | Submitted Charge | Medicare Allowed |
|---|---|---|---|---|
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99285
Emergency department visit with high level of medical decision making
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328 | 312 | $822.00 | $178.55 |
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93010
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only
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315 | 268 | $60.90 | $8.16 |
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99284
Emergency department visit with moderate level of medical decision making
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83 | 83 | $704.00 | $123.24 |
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99291
Critical care, first 30-74 minutes
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41 | 41 | $2406.00 | $217.20 |
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99283
Emergency department visit with low level of medical decision making
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26 | 26 | $551.00 | $73.00 |
Source: CMS Part B by Provider and Service, 2024; services under 11 beneficiaries omitted by CMS. Privacy limits
Submitted charges are billed amounts, not a price quote for your visit.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Cephalexin | Cephalexin | 36 | 261 | $158.57 | 36 |
| Ondansetron Odt | Ondansetron | 33 | 205 | $253.94 | 33 |
| Hydrocodone-Acetaminophen | Hydrocodone/Acetaminophen | 31 | 109 | $164.61 | 31 |
| Amoxicillin-Clavulanate Potass | Amoxicillin/Potassium Clav | 15 | 104 | $93.72 | 15 |
| Prednisone | Prednisone | 13 | 59 | $13.99 | 13 |
| Dicyclomine Hcl | Dicyclomine Hcl | 12 | 72 | $48.44 | 12 |
Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2025-11-25NUCC Taxonomy Code: 207P00000X
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.
NUCC Taxonomy Code: 207P00000X
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.
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - EMERGENCY MEDICINE
I20131011000349
WI
0446212401
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Secondary Practice Locations
1000 Mineral Point Ave
Janesville, WI 53548
Phone: 6087566111
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Psychiatry & Neurology - Neurology
Emergency Medicine
Doctor of Medicine (M.D.)
Hospitalist
Doctor of Medicine (M.D.)
Nurse Practitioner
Hospitalist
Doctor of Osteopathic Medicine (D.O.)
Hospitalist
Doctor of Medicine (M.D.)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 801 S WASHINGTON ST, NAPERVILLE, IL 605407430 (Tel: 6305273000)
Emergency Medicine (license number reported to NPPES: WI 60901-20)
Registered at 1000 MINERAL POINT AVE, JANESVILLE, WI 53548 (Tel: 6087566111)
Registered at 1000 MINERAL POINT AVE, JANESVILLE, WI 535482940 (Tel: 6087566111)
Recorded as MICHAEL HARTMANN, MD
NPI status registered as active in NPPES database
Registered at 801 S WASHINGTON ST, NAPERVILLE, IL 605407430 (Tel: 6305273000)
Registered at 801 S WASHINGTON ST, NAPERVILLE, IL 605407430 (Tel: 6305273000)
Recorded as MICHAEL HARTMANN, M.D.
Emergency Medicine (license number reported to NPPES: IL 036-109982)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Emergency Medicine Providers in Naperville
- Dr. Sina Memari, MD
- Dr. Bassam Kawadry, MD
- Dr. David Stasior, MD
- Dr. Sarah Whyte, DO
- Dr. Guy Miller, DO
- Dr. Barbara Shufeldt, MD
More public profiles in Illinois
Directory navigation, in NPI number order.
- Mauricio Valencia Nurse Practitioner - Family ยท Park Ridge
- Jessica Berger, PA-C Physician Assistant ยท Evergreen Park
- William Lehman, NP Nurse Practitioner - Adult Health ยท Urbana
- Tonya Cosby, FNP-C Nurse Practitioner - Family ยท Chicago
- Mustafa Mafraji, MBBS Radiology - Diagnostic Neuroimaging ยท Chicago
- Emily Sproat, PT, DPT Physical Therapist ยท Lisle
- Holly Abell Physical Therapist ยท Cahokia
- Ryan Colon, PA-C Physician Assistant ยท Vernon Hills
- Saem Haque, MD Radiology - Diagnostic Radiology ยท Evergreen Park
- Steven Keglar, DDS Dentist ยท Elk Grove Village
- Sarita Sharma, MD Psychiatry & Neurology - Psychiatry ยท Champaign
- Matthew Deniger Nurse Anesthetist, Certified Registered ยท Geneva
Mailing Address
1000 Mineral Point Ave
Janesville, WI 535482940
Phone: 6087566111