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RAMARATHINAM NAGARAJAN MD PHD
NPI 1689636482
Allergy & Immunology in Minneapolis, MN

Active since April 05, 2006PECOS EnrolledAccepts Medicare Assignment
825 NICOLLET MALL, 221, MINNEAPOLIS, MN 55402(612) 339-0807(612) 339-1854 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Ramarathinam Nagarajan Md Phd NPPES

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

RAMARATHINAM NAGARAJAN MD PHD (NPI 1689636482) is an individual allergy & immunology provider in Minneapolis, Minnesota, licensed in Minnesota (42705) and active in the NPI registry since April 2006. He is enrolled in Medicare PECOS and is a graduate of Other (1976).

NPPES Registry Identity

NPI1689636482
Entity TypeIndividualMale
Primary Taxonomy207K00000X
Provider Legal NameRAMARATHINAM NAGARAJANCredential: MD PHD
Location Address825 NICOLLET MALL, 221Minneapolis, MN 55402
Mailing Address825 Nicollet Mall, 221Minneapolis, MN 55402 · (612) 339-0807 · Fax (612) 339-1854
Phone(612) 339-0807
Fax(612) 339-1854
Sole ProprietorNo
Medical School CMSOtherGraduated 1976
Enumeration DateApril 5, 2006
Last NPPES UpdateJuly 8, 2007
✔ NPI 1689636482 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAllergy & ImmunologyAllopathic & Osteopathic Physicians
Taxonomy Code207K00000X
License✔ Licensed in MN · 42705
Definition
An allergist-immunologist is trained in evaluation, physical and laboratory diagnosis, and management of disorders involving the immune system. Selected examples of such conditions include asthma, anaphylaxis, rhinitis, eczema, and adverse reactions to drugs, foods, and insect stings as well as immune deficiency diseases (both acquired and congenital), defects in host defense, and problems related to autoimmune disease, organ transplantation, or malignancies of the immune system.
825 NICOLLET MALL, Minneapolis, MN 55402
Open in Google Maps ↗

Other Identifiers 2

Medicare UPINH21965
Other88DG9NABcbsbp

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Ramarathinam Nagarajan Md Phd is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID2668567496
PECOS Enrollment IDI20100505000028
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 Reassignment

Medicare enrollment records show Ramarathinam Nagarajan reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Minnesota Allergy & Asthma LLC
6.6 mi
Allergy & Immunology
6550 YORK AVE S STE 112
Edina, MN 55435
  • Reassigned Medicare billing, Minnesota enrollment
NPI 1881736544 (952) 746-1854

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 6

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.

Professional service for preparation and provision of 1 or more antigens 95165
This service involves the creation and supply of antigens, substances that stimulate your immune system to fight diseases. These antigens can be used in vaccines or allergy tests to help your body build defenses against specific health threats.
795 services53 patients
Professional service for multiple injections of allergen 95117
The professional service for multiple injections of allergens involves administering small doses of specific allergens into your body. This is done to help your immune system become less sensitive to them, reducing your allergic reaction over time. It's a safe, effective way to manage allergies.
568 services82 patients
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
30 services29 patients
Test to measure expiratory airflow and volume 94010
This test, known as spirometry, assesses how well your lungs work. It measures how much air you can inhale, how much you can exhale and how quickly you can exhale. It's non-invasive and helps diagnose conditions like asthma or COPD.
23 services23 patients
Evaluation of use of breathing device 94664
The evaluation of a breathing device involves checking how effectively you're using it to manage your respiratory condition. It assesses the device's fit, your comfort, and your technique to ensure optimal results.
22 services22 patients
New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205
This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.
12 services12 patients

Referred Medical Equipment & Supplies CMS DME claims 6

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate E1390
DME-Oxygen and Supplies · category DC002N
3 suppliers29 claims29 services$92.06 avg. paid by Medicare
Arformoterol, inhalation solution, fda approved final product, non-compounded, administered through dme, unit dose form, 15 micrograms J7605
DME-Drugs Administered Through DME · category DG006N
3 suppliers33 claims2,070 services$4.69 avg. paid by Medicare
Formoterol fumarate, inhalation solution, fda approved final product, non-compounded, administered through dme, unit dose form, 20 micrograms J7606
DME-Drugs Administered Through DME · category DG006N
1 supplier12 claims600 services$6.34 avg. paid by Medicare
Budesonide, inhalation solution, fda-approved final product, non-compounded, administered through dme, unit dose form, up to 0.5 mg J7626
DME-Drugs Administered Through DME · category DG000N
4 suppliers42 claims3,240 services$0.81 avg. paid by Medicare
Supplies for external non-insulin drug infusion pump, syringe type cartridge, sterile, each K0552
DME-Other DME · category DE000N
1 supplier11 claims25 services$2.40 avg. paid by Medicare
Pharmacy dispensing fee for inhalation drug(s); per 30 days Q0513
DME-Other DME · category DE000N
3 suppliers43 claims43 services$26.06 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

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. VIRGINIA ANNE MCDERMOTT PH.D.
Psychologist
825 NICOLLET MALL, SUITE 1630
MINNEAPOLIS, MN 55402
Hennepin County (612) 673-9988
SKIN SPECIALISTS, LTD.
Dermatology
825 NICOLLET MALL, SUITE 1002
MINNEAPOLIS, MN 55402
Hennepin County (612) 338-0711
DR. GARY M FINE
Dentist
825 NICOLLET MALL
MINNEAPOLIS, MN 55402
Hennepin County (612) 332-1336
BIRCHWOOD DENTAL OF MINNEAPOLIS
Dentist (General Practice)
825 NICOLLET MALL, 829 MEDICAL ARTS BLDG
MINNEAPOLIS, MN 55402
Hennepin County (612) 333-8677
DOWNTOWN SKYWAY FOOT SPECIALISTS INC
Podiatrist (Foot Surgery)
825 NICOLLET MALL, SUITE 517 MEDICAL ARTS BLDG
MINNEAPOLIS, MN 55402
Hennepin County (612) 332-7720
ADVANCED FOOT CARE CLINIC,LTD
Podiatrist
825 NICOLLET MALL, SUITE 601
MINNEAPOLIS, MN 55402
Hennepin County (763) 550-1013
MARK ALAN JOHNSON D.C.
Chiropractor
825 NICOLLET MALL, STE 1845
MINNEAPOLIS, MN 55402
Hennepin County (612) 332-8292
PAIN & INJURY CENTER PLLC
Physical Medicine & Rehabilitation (Pain Medicine)
825 NICOLLET MALL, SUITE #1453
MINNEAPOLIS, MN 55402
Hennepin County (612) 886-1562

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 Ramarathinam Nagarajan's NPI number?

The NPI number for Ramarathinam Nagarajan is 1689636482. It was assigned to this individual provider in the NPPES registry on April 5, 2006.

Where is Ramarathinam Nagarajan located?

Ramarathinam Nagarajan practices at 825 Nicollet Mall 221, Minneapolis, MN 55402. The listed phone number is (612) 339-0807.

What is Ramarathinam Nagarajan's specialty?

The primary specialty registered for this NPI is Allergy & Immunology with taxonomy code 207K00000X.

Is Ramarathinam Nagarajan enrolled in Medicare?

Yes. Ramarathinam Nagarajan is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organization bills Medicare for Ramarathinam Nagarajan's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Ramarathinam Nagarajan reassigns Medicare benefits to Minnesota Allergy & Asthma LLC (Edina, MN). The 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 Ramarathinam Nagarajan'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 Ramarathinam Nagarajan was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 years 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.