Dr. Mark A. Nessim, MD
- Medicare services, 2024
- 126
- Medicare patients, 2024
- 202
- Hospital affiliations
- 2
- Industry payments
- $246
- Medical groups
- 3
- Practice address
- 1325 N Highland Ave, Aurora, IL 60506
- Practice phone
- Call (630) 859-2222
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Presence Mercy Medical Center- Aurora
Aurora, Illinois
Find Dr. Nessim's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Mark A. Nessim is an anesthesiologist in Aurora, Illinois
Dr. Nessim practices at Presence Mercy Medical Center- Aurora in Aurora, Illinois.
Dr. Nessim's NPI, 1780840488, was assigned on August 1, 2008. Dr. Nessim holds Illinois license 36.121278.
- NPI
- 1780840488NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4385799196
- NPI enumeration date
- August 1, 2008
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (630) 859-2222
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 47
- Medical school graduation
- 2005
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Mark A. Nessim practices at Presence Mercy Medical Center- Aurora in Aurora, Illinois
Dr. Nessim's primary practice is Presence Mercy Medical Center- Aurora, at 1325 N Highland Ave, Aurora, IL 60506 in Kane County. The practice phone is (630) 859-2222.
- Presence Mercy Medical Center- Aurora1325 N Highland Ave, Aurora, IL 60506 · Kane CountyPhone(630) 859-2222
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Mark A. Nessim is affiliated with 3 sites of care and 3 medical groups
Dr. Nessim's primary practice is Presence Mercy Medical Center- Aurora in Aurora, Illinois. Dr. Nessim is also affiliated with Mercy Medical Center. The medical group on file is Northwestern Medicine Regional Medical Group. Dmand AI also links Dr. Nessim to 1 more hospital and 2 medical groups, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Mark A. Nessim's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Nessim practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Presence Mercy Medical Center- Aurora | Available with a free account |
| +2 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across each health system and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Mark A. Nessim is one of 1,887 anesthesiologists in Illinois
Anesthesiology is Dr. Nessim's primary specialty in the NPI Registry, under taxonomy code 207L00000X. Dr. Nessim is licensed in Illinois.
Specialties and state licenses
- Anesthesiology, IllinoisPrimary
Anesthesiologists near Dr. Nessim
Counts of anesthesiologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Mark A. Nessim billed Medicare for 126 services in 2024
CMS data shows 126 Medicare services from Dr. Nessim across 4 procedure codes in 2024, for 202 Medicare patients. Medicare paid $12,815 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Nessim's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Anesthesia
- 2023: 1372024: 1268%
Dr. Nessim compared with the Illinois median for anesthesiologists, 2024
- Dr. Nessim
- Illinois median
- Medicare services
- 126vs 9138% above
- Medicare patients
- 202vs 15729% above
Medians across 1,742 anesthesiologists in Illinois with Dmand AI profiles that report each measure.
Dr. Nessim's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Nessim?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Nessim and other anesthesiologists in Illinois.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Mark A. Nessim treated 202 Medicare patients in 2024, average age 73
CMS counts 202 Medicare patients who saw Dr. Nessim in 2024. The largest group is 65 to 74, with 100 patients. 75% of them have high cholesterol, and 69% have high blood pressure. 12% are also on Medicaid. Their average risk score is 1.18, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Nessim's median patient age at 55, with 57% women.
Dr. Nessim's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Nessim's Medicare patients by sex, 2024
- Women10954%
- Men9346%
Chronic conditions among Dr. Nessim's Medicare patients, 2024
- High cholesterol75%
- High blood pressure69%
- Arthritis51%
- Anxiety32%
- Diabetes27%
- Ischemic heart disease24%
- Chronic kidney disease22%
- Mood disorders22%
Share of Medicare patients with each condition. A patient can have several.
Dr. Nessim's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 55
Patient panel by sex, all payers
- Women57%
- Men43%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
How Dr. Mark A. Nessim takes part in Medicare
Dr. Nessim accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Mark A. Nessim received $246 in industry payments from 2016 to 2025
CMS Open Payments shows 4 general payments to Dr. Nessim from 3 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Merck Sharp & Dohme Corporation paid the most, $117.
General payments to Dr. Nessim by program year, 2016 to 2025
Companies that paid Dr. Nessim the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Mark A. Nessim's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Mark A. Nessim
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Mark A. Nessim's NPI number?
Dr. Mark A. Nessim's NPI number is 1780840488. It was assigned on August 1, 2008, and it is active in the NPI Registry.
What kind of doctor is Dr. Mark A. Nessim?
Dr. Mark A. Nessim is an anesthesiologist in Aurora, Illinois. The primary specialty in the NPI Registry is Anesthesiology Physician (taxonomy code 207L00000X).
Where does Dr. Mark A. Nessim practice?
Dr. Nessim practices at 1325 N Highland Ave, Aurora, IL 60506. Dr. Nessim's primary practice is Presence Mercy Medical Center- Aurora in Aurora, Illinois. Dmand AI also links Dr. Nessim to 1 hospital and 2 medical groups.
What is Dr. Mark A. Nessim's office phone number?
The practice phone on file for Dr. Nessim is (630) 859-2222.
What is Dr. Mark A. Nessim's medical license number?
Dr. Nessim holds Illinois license 36.121278.
Which hospitals is Dr. Mark A. Nessim affiliated with?
Dr. Nessim is affiliated with Mercy Medical Center. Dmand AI links Dr. Nessim to 1 more hospital.
What medical group is Dr. Mark A. Nessim part of?
Dr. Nessim is linked to Northwestern Medicine Regional Medical Group. Dmand AI links Dr. Nessim to 2 more medical groups.
Does Dr. Mark A. Nessim accept Medicare?
Yes. CMS data shows Dr. Nessim billed Medicare for 126 services in 2024, and Dr. Nessim accepts Medicare assignment.
How many Medicare patients does Dr. Mark A. Nessim see?
CMS counts 202 Medicare patients who saw Dr. Nessim in 2024, with an average age of 73.
What services does Dr. Mark A. Nessim bill to Medicare?
In 2024, Dr. Nessim's most billed Medicare services were anesthesia (00812), anesthesia (00813) and anesthesia (00731).
Has Dr. Mark A. Nessim received payments from drug or device companies?
CMS Open Payments shows $246 in general payments to Dr. Nessim from 3 companies from 2016 to 2025. The largest total came from Merck Sharp & Dohme Corporation.
How long has Dr. Mark A. Nessim been practicing?
Dr. Nessim graduated from medical school in 2005, 21 years ago.
Selling to anesthesiology practices?
See anesthesiologists in Illinois by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card