Dr. Ramarathinam Nagarajan, MD, PhD
- Medicare services, 2024
- 1,450
- Medicare patients, 2024
- 119
- Part D claims, 2024
- 834
- Hospital affiliations
- 1
- Industry payments
- $1,790
- Practice address
- 8100 Northland Dr, Minneapolis, MN 55431
- Practice phone
- Call (952) 831-8742
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Tria Orthopaedic Center - Bloomington
Minneapolis, Minnesota
Find Dr. Nagarajan'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. Ramarathinam Nagarajan is an allergist and immunologist in Minneapolis, Minnesota
Dr. Nagarajan practices at Tria Orthopaedic Center - Bloomington in Minneapolis, Minnesota.
Dr. Nagarajan's NPI, 1689636482, was assigned on April 5, 2006. Dr. Nagarajan holds Minnesota license 42705.
- NPI
- 1689636482NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2668567496
- NPI enumeration date
- April 5, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (952) 831-8742
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 76
- Medical school graduation
- 1976
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Ramarathinam Nagarajan practices at Tria Orthopaedic Center - Bloomington in Minneapolis, Minnesota
Dr. Nagarajan's primary practice is Tria Orthopaedic Center - Bloomington, at 8100 Northland Dr, Minneapolis, MN 55431 in Hennepin County. The practice phone is (952) 831-8742.
- Tria Orthopaedic Center - Bloomington8100 Northland Dr, Minneapolis, MN 55431 · Hennepin CountyPhone(952) 831-8742
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Ramarathinam Nagarajan is affiliated with 3 sites of care and 1 medical group
Dr. Nagarajan's primary practice is Tria Orthopaedic Center - Bloomington in Minneapolis, Minnesota. Dr. Nagarajan is also affiliated with M Health Fairview University of Minnesota Medical Center. The medical group on file is Minnesota Allergy & Asthma. Dmand AI also links Dr. Nagarajan to 1 more group practice or clinic, 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. Ramarathinam Nagarajan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Nagarajan practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Tria Orthopaedic Center - Bloomington | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Ramarathinam Nagarajan is one of 69 allergists and immunologists in Minnesota
Allergy and immunology is Dr. Nagarajan's primary specialty in the NPI Registry, under taxonomy code 207K00000X. Dr. Nagarajan is licensed in Minnesota.
Specialties and state licenses
- Allergy and immunology, MinnesotaPrimary
Allergists and immunologists near Dr. Nagarajan
Counts of allergists and immunologists 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. Ramarathinam Nagarajan billed Medicare for 1,450 services in 2024
CMS data shows 1,450 Medicare services from Dr. Nagarajan across 6 procedure codes in 2024, for 119 Medicare patients. Medicare paid $19,328 for them. Every service was in an office.
Dr. Nagarajan's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Tests and treatments
- 2023: 4,8272024: 1,40871%
- Office and hospital visits
- 2023: 1142024: 4263%
- Other services
- 2023: 752024: 0100%
Dr. Nagarajan compared with the Minnesota median for allergists and immunologists, 2024
- Dr. Nagarajan
- Minnesota median
- Medicare services
- 1,450vs 6442.3 times
- Medicare patients
- 119vs 9229% above
- Part D claims
- 722vs 2722.7 times
Medians across 77 allergists and immunologists in Minnesota with Dmand AI profiles that report each measure.
Dr. Nagarajan'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.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Nagarajan and other allergists and immunologists in Minnesota.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Ramarathinam Nagarajan treated 119 Medicare patients in 2024, average age 74
CMS counts 119 Medicare patients who saw Dr. Nagarajan in 2024. The largest group is 75 to 84, with 50 patients. 70% of them have high cholesterol, and 63% have high blood pressure. 9% are also on Medicaid. Their average risk score is 0.91, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Nagarajan's median patient age at 50, with 68% women.
Dr. Nagarajan's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Nagarajan's Medicare patients by sex, 2024
- Women7462%
- Men4538%
Chronic conditions among Dr. Nagarajan's Medicare patients, 2024
- High cholesterol70%
- High blood pressure63%
- Asthma53%
- Arthritis47%
- Anxiety29%
- Mood disorders26%
- Depression24%
- Ischemic heart disease23%
Share of Medicare patients with each condition. A patient can have several.
Dr. Nagarajan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 50
Patient panel by sex, all payers
- Women68%
- Men32%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Ramarathinam Nagarajan wrote 834 Medicare Part D claims in 2024
In 2024, Dr. Nagarajan wrote 834 Medicare Part D claims for 174 patients. 50% of them were for generic drugs. CMS names the drug for 722 of them, across 16 drugs with 11 or more claims each, at $3,863,624 in total drug cost. In 2023, CMS named 825 claims across 22 drugs.
Dr. Nagarajan's Part D claims by kind of drug, 2024
- Generic417 claims50%
- Brand-name417 claims50%
Dr. Nagarajan's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 8252024: 72212%
Drugs named by CMS: 16 in 2024, 22 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Ramarathinam Nagarajan takes part in Medicare
Dr. Nagarajan 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)
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Dr. Ramarathinam Nagarajan received $1,790 in industry payments from 2016 to 2025
CMS Open Payments shows 114 general payments to Dr. Nagarajan from 31 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 99% of the total. Regeneron Pharmaceuticals, Inc. paid the most, $141.
General payments to Dr. Nagarajan by program year, 2016 to 2025
General payments to Dr. Nagarajan by kind, 2016 to 2025
- Food and beverage$1,76599%
- Education$251%
Companies that paid Dr. Nagarajan 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. Ramarathinam Nagarajan'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) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - 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. Ramarathinam Nagarajan
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. Ramarathinam Nagarajan's NPI number?
Dr. Ramarathinam Nagarajan's NPI number is 1689636482. It was assigned on April 5, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Ramarathinam Nagarajan?
Dr. Ramarathinam Nagarajan is an allergist and immunologist in Minneapolis, Minnesota. The primary specialty in the NPI Registry is Allergy & Immunology Physician (taxonomy code 207K00000X).
Where does Dr. Ramarathinam Nagarajan practice?
Dr. Nagarajan practices at 8100 Northland Dr, Minneapolis, MN 55431. Dr. Nagarajan's primary practice is Tria Orthopaedic Center - Bloomington in Minneapolis, Minnesota. Dmand AI also links Dr. Nagarajan to 1 group practice or clinic.
What is Dr. Ramarathinam Nagarajan's office phone number?
The practice phone on file for Dr. Nagarajan is (952) 831-8742.
What is Dr. Ramarathinam Nagarajan's medical license number?
Dr. Nagarajan holds Minnesota license 42705.
Which hospitals is Dr. Ramarathinam Nagarajan affiliated with?
Dr. Nagarajan is affiliated with M Health Fairview University of Minnesota Medical Center.
What medical group is Dr. Ramarathinam Nagarajan part of?
Dr. Nagarajan is linked to Minnesota Allergy & Asthma.
Does Dr. Ramarathinam Nagarajan accept Medicare?
Yes. CMS data shows Dr. Nagarajan billed Medicare for 1,450 services in 2024, and Dr. Nagarajan accepts Medicare assignment.
How many Medicare patients does Dr. Ramarathinam Nagarajan see?
CMS counts 119 Medicare patients who saw Dr. Nagarajan in 2024, with an average age of 74.
What services does Dr. Ramarathinam Nagarajan bill to Medicare?
In 2024, Dr. Nagarajan's most billed Medicare services were allergy test or treatment (95165), allergy test or treatment (95117) and office visit, established patient (99215).
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What drugs does Dr. Ramarathinam Nagarajan prescribe most?
In 2024 Medicare Part D data, Dr. Nagarajan's most prescribed drugs by claims were Trelegy Ellipta, Zafirlukast and Fluticasone Propionate.
Has Dr. Ramarathinam Nagarajan received payments from drug or device companies?
CMS Open Payments shows $1,790 in general payments to Dr. Nagarajan from 31 companies from 2016 to 2025. The largest total came from Regeneron Pharmaceuticals, Inc.
How long has Dr. Ramarathinam Nagarajan been practicing?
Dr. Nagarajan graduated from medical school in 1976, 50 years ago.
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