Dr. Kumar Nathan, MD
- Medicare services, 2023
- 29
- Medicare patients, 2024
- 18
- MIPS score, 2024
- 95
- Hospital affiliations
- 2
- Industry payments
- $416
- Practice address
- 4201 Medical Center Drive, Mchenry, IL 60050
- Practice phone
- Call (815) 344-5000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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Dr. Kumar Nathan is a hospitalist in Mchenry, Illinois
Dr. Nathan practices at Northwestern Medicine McHenry Hospital in Mchenry, Illinois, part of Northwestern Memorial HealthCare.
Dr. Nathan's NPI, 1245251834, was assigned on July 21, 2006. Dr. Nathan holds Illinois license 036109506.
- NPI
- 1245251834NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4385720630
- NPI enumeration date
- July 21, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (815) 344-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 52
- Medical school graduation
- 2000
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Kumar Nathan practices at Northwestern Medicine McHenry Hospital in Mchenry, Illinois
Dr. Nathan's primary practice is Northwestern Medicine McHenry Hospital, at 4201 Medical Center Drive, Mchenry, IL 60050 in Mc Henry County. The practice phone is (815) 344-5000.
- Northwestern Medicine McHenry Hospital4201 Medical Center Drive, Mchenry, IL 60050 · Mc Henry CountyPhone(815) 344-5000
Source: Dmand AI Affiliation Data
Dr. Kumar Nathan is affiliated with 4 sites of care and 2 medical groups
Dr. Nathan's primary practice is Northwestern Medicine McHenry Hospital in Mchenry, Illinois, part of Northwestern Memorial HealthCare. The medical group on file is Northwestern Medical Faculty Foundation. Dmand AI also links Dr. Nathan to 1 more hospital, 2 group practices and clinics and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Kumar Nathan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Nathan practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Northwestern Medicine McHenry Hospital | Available with a free account |
| +3 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Kumar Nathan is one of 1,321 hospitalists in Illinois
Hospitalist is Dr. Nathan's primary specialty in the NPI Registry, under taxonomy code 208M00000X. Dr. Nathan is licensed in Illinois.
Specialties and state licenses
- Hospitalist, IllinoisPrimary
Hospitalists near Dr. Nathan
Counts of hospitalists 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. Kumar Nathan billed Medicare for 29 services in 2023
CMS data shows 29 Medicare services from Dr. Nathan across 2 procedure codes in 2023, for 18 Medicare patients. Medicare paid $1,385 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Nathan's Medicare services by type, 2016 to 2023
- 2016
- 2023
- Office and hospital visits
- 2016: 202023: 2945%
Dr. Nathan compared with the Illinois median for hospitalists, 2023
- Dr. Nathan
- Illinois median
- Medicare services
- 29vs 54395% below
- Medicare patients
- 18vs 24293% below
Medians across 1,248 hospitalists in Illinois with Dmand AI profiles that report each measure.
Dr. Nathan's most billed Medicare procedure codes, 2023
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Nathan and other hospitalists in Illinois.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Kumar Nathan treated 18 Medicare patients in 2024, average age 75
CMS counts 18 Medicare patients who saw Dr. Nathan in 2024. 75% of them have arthritis, and 75% have high blood pressure. Their average risk score is 1.61, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Nathan's median patient age at 57, with 50% women.
Chronic conditions among Dr. Nathan's Medicare patients, 2024
- Arthritis75%
- High blood pressure75%
- High cholesterol72%
Share of Medicare patients with each condition. A patient can have several.
Dr. Nathan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 57
Patient panel by sex, all payers
- Women50%
- Men50%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Kumar Nathan scored 95 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 95 out of 100 for Dr. Nathan for performance year 2024, reported through an alternative payment model (APM). Dr. Nathan accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Nathan's MIPS scores, performance year 2024
- 95of 100Final score
- 83of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Kumar Nathan received $416 in industry payments from 2020 to 2025
CMS Open Payments shows 8 general payments to Dr. Nathan from 7 drug and device companies from 2020 to 2025. Food and beverage make up the largest share, 96% of the total. Ferring Pharmaceuticals Inc. paid the most, $114.
General payments to Dr. Nathan by program year, 2020 to 2025
General payments to Dr. Nathan by kind, 2020 to 2025
- Food and beverage$39996%
- Travel and lodging$174%
Companies that paid Dr. Nathan the most, 2020 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Kumar Nathan'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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand 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)Clinician Public Reporting: Overall MIPS Performance (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. Kumar Nathan
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. Kumar Nathan's NPI number?
Dr. Kumar Nathan's NPI number is 1245251834. It was assigned on July 21, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Kumar Nathan?
Dr. Kumar Nathan is a hospitalist in Mchenry, Illinois. The primary specialty in the NPI Registry is Hospitalist Physician (taxonomy code 208M00000X).
Where does Dr. Kumar Nathan practice?
Dr. Nathan practices at 4201 Medical Center Drive, Mchenry, IL 60050. Dr. Nathan's primary practice is Northwestern Medicine McHenry Hospital in Mchenry, Illinois, part of Northwestern Memorial HealthCare. Dmand AI also links Dr. Nathan to 1 hospital, 2 group practices and clinics and 1 medical group.
What is Dr. Kumar Nathan's office phone number?
The practice phone on file for Dr. Nathan is (815) 344-5000.
What is Dr. Kumar Nathan's medical license number?
Dr. Nathan holds Illinois license 036109506.
Which hospitals is Dr. Kumar Nathan affiliated with?
Dr. Nathan practices at Northwestern Medicine McHenry Hospital in Mchenry, Illinois. Dmand AI links Dr. Nathan to 1 more hospital.
What medical group is Dr. Kumar Nathan part of?
Dr. Nathan is linked to Northwestern Medical Faculty Foundation. Dmand AI links Dr. Nathan to 1 more medical group.
Does Dr. Kumar Nathan accept Medicare?
Yes. CMS data shows Dr. Nathan billed Medicare for 29 services in 2023, and Dr. Nathan accepts Medicare assignment.
What is Dr. Kumar Nathan's MIPS score?
Dr. Nathan's MIPS final score for performance year 2024 is 95 out of 100, reported through an alternative payment model (APM).
How many Medicare patients does Dr. Kumar Nathan see?
CMS counts 18 Medicare patients who saw Dr. Nathan in 2024, with an average age of 75.
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What services does Dr. Kumar Nathan bill to Medicare?
In 2023, Dr. Nathan's most billed Medicare services were hospital inpatient care (99231) and hospital inpatient care (99232).
Has Dr. Kumar Nathan received payments from drug or device companies?
CMS Open Payments shows $416 in general payments to Dr. Nathan from 7 companies from 2020 to 2025. The largest total came from Ferring Pharmaceuticals Inc.
How long has Dr. Kumar Nathan been practicing?
Dr. Nathan graduated from medical school in 2000, 26 years ago.
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