DR. VIJAY VISWANATHAN M.D.
NPI 1982792818
Radiology - Diagnostic Radiology in Dover, DE

Q: What is Vijay Viswanathan's NPI number?

The NPI number for Vijay Viswanathan is 1982792818. It was assigned to this individual provider in the NPPES registry on October 10, 2006.

Q: What is Vijay Viswanathan's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.

Q: When was this NPI record last updated?

The NPPES record for Vijay Viswanathan was last updated on November 30, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.

Active since October 10, 2006PECOS Enrolled

88.38/100

CMS Quality Rating

640 S STATE ST, DOVER, DE 19901(302) 480-1688(302) 480-9807 Get Directions Write a Review

NPPES record last updated: November 30, 2023. Verified against the NPPES registry weekly; last sync: October 25, 2026.

On this page

About Dr. Vijay Viswanathan M.d. NPPES

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

DR. VIJAY VISWANATHAN M.D. (NPI 1982792818) is an individual diagnostic radiology provider in Dover, Delaware, licensed in Delaware (C1-0009394) and active in the NPI registry since October 2006. He is enrolled in Medicare PECOS and is a graduate of Texas A & M University System, Hsc, College Of Medicine (2001).

NPPES Registry Identity

NPI1982792818

Entity TypeIndividualMale

Primary Taxonomy2085R0202X

Provider Legal NameDR. VIJAY VISWANATHANCredential: M.D.

Location Address640 S STATE STDover, DE 19901-3530

Mailing Address640 S. State St, Mail Code 3055Dover, DE 19901-3530 · (302) 480-1688 · Fax (302) 480-9807

Phone(302) 480-1688

Fax(302) 480-9807

Sole ProprietorNo

Medical School CMSTexas A & M University System, Hsc, College Of MedicineGraduated 2001

Enumeration DateOctober 10, 2006

Last NPPES UpdateNovember 30, 2023

NPPES CertifiedNovember 28, 2023

✔ NPI 1982792818 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyRadiology · Diagnostic RadiologyAllopathic & Osteopathic Physicians

Taxonomy Code2085R0202X

Licenses✔ Licensed in DE · C1-0009394✔ Licensed in MD · D0068887✔ Licensed in MA · 230305

Definition

A radiologist who utilizes x-ray, radionuclides, ultrasound and electromagnetic radiation to diagnose and treat disease.

Also ListedRadiology · NeuroradiologyTaxonomy 2085N0700X · License C1-0009394 (DE)

Also ListedRadiology · Nuclear RadiologyTaxonomy 2085N0904X · License C1-0009394 (DE)

640 S STATE ST, Dover, DE 19901

Open in Google Maps ↗

Other Identifiers 8

OtherP00751354Aad Rr Ptan

OtherS645MD · Aad Bcbs

Medicaid417828900MD

Other1073MD · Aad Blue Choice

Other156383ZDYCMD · Rr Medicare Ara Ptan

Other1073MD · Aad Bcbs Regional Plans

Other3811MD · Aad Shipleys Blue Choice

OtherKC46SHMD · Aad Shipleys Bcbs

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Vijay Viswanathan M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID2668572462

PECOS Enrollment IDI20101030000136, I20231108003546

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 Reassignments

Medicare enrollment records show Vijay Viswanathan reassigns Medicare billing to 13 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Bayhealth Radiologists LLC

Same address

Diagnostic Radiology

640 S STATE ST
Dover, DE 19901

Reassigned Medicare billing, Delaware enrollment
33 clinicians in this Medicare group

NPI 1366214124 (302) 744-7162

Kent Diagnostic Radiology Associates PA

Same address

Diagnostic Radiology

640 S STATE ST
Dover, DE 19901

Reassigned Medicare billing, Delaware enrollment
16 clinicians in this Medicare group

NPI 1417044298 (302) 674-2202

Lenox Hill Radiology & Medical Imaging Associates, PC

138 mi

Diagnostic Radiology

61 E 77TH ST
New York, NY 10021

Reassigned Medicare billing, Delaware enrollment
8 clinicians in this Medicare group

NPI 1821036807 (212) 772-3111

Solano Diagnostics Partners, A Calif Limted Partnership

2,353 mi

Diagnostic Radiology

3940 GOLDEN TERRACE LN
Chino Hills, CA 91709

Reassigned Medicare billing, California and Delaware enrollments
Medicare enrollment name: Solano Diagnostics Partners A Calif Limited Partnership
Also billed through NPI 1811940661 (Delaware)
88 clinicians in this Medicare group

NPI 1588116800 (559) 455-4026

Bay Imaging Consultants Medical Group Inc

2,477 mi

Diagnostic Radiology

2400 BALFOUR RD
Brentwood, CA 94513

Reassigned Medicare billing, Delaware enrollment

NPI 1730335605 (925) 296-7156

Northbay Healthcare Group

2,480 mi

General Acute Care Hospital

1000 NUT TREE RD
Vacaville, CA 95687

Reassigned Medicare billing, California enrollment
Medicare enrollment name: Northbay Physicians Surgery Center, LLC
516 clinicians in this Medicare group

NPI 1255483202 (707) 646-3401

County Of Santa Clara

2,486 mi

Federally Qualified Health Center (FQHC)

7475 CAMINO ARROYO
Gilroy, CA 95020

Reassigned Medicare billing, California enrollment
Also billed through NPI 1043354020 (California)
2,460 clinicians in this Medicare group

NPI 1922093533 (408) 885-5000

Michael P Sherman MD Phd, A Medical Corporation

2,492 mi

Hematology & Oncology

500 LENNON LN
Walnut Creek, CA 94598

Reassigned Medicare billing, California enrollment
60 clinicians in this Medicare group

NPI 1831201912 (925) 939-9610

John Muir Magnetic Imaging Center

2,493 mi

Diagnostic Radiology

1601 YGNACIO VALLEY RD
Walnut Creek, CA 94598

Reassigned Medicare billing, California and Delaware enrollments
129 clinicians in this Medicare group

NPI 1235184110 (925) 296-7156

John Muir Trauma Physicians Billing Service

2,493 mi

Trauma Surgery

1601 YGNACIO VALLEY RD
Walnut Creek, CA 94598

Reassigned Medicare billing, California enrollment
810 clinicians in this Medicare group

NPI 1962551861 (925) 947-5331

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 47

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.

Injection, gadobutrol, 0.1 ml A9585

Gadobutrol is a contrast agent used during MRI scans to help provide clearer images. It's injected into your vein before the scan. This helps doctors to see certain areas more clearly for better diagnosis. It's generally safe with few side effects.

3,200 services38 patients

X-ray of chest, 1 view 71045

A chest X-ray, 1 view, is a quick, painless test that produces images of the structures within your chest, such as your heart, lungs, and blood vessels. It helps in diagnosing conditions like pneumonia, heart problems, or lung cancer. You'll stand in front of a machine that emits X-rays, which pass through your body to create the image.

929 services832 patients

Ct scan head or brain without contrast 70450

A CT scan of the head or brain without contrast is a non-invasive imaging procedure. It uses X-rays to create detailed pictures of your brain, skull, and other structures inside your head. It helps to detect conditions like strokes, tumors, or injuries. No dye (contrast) is used in this test.

240 services233 patients

Mri scan of lower spinal canal without contrast 72148

An MRI scan of the lower spinal canal without contrast is a non-invasive imaging test. It uses a magnetic field and radio waves to produce detailed images of your lower spine. This helps identify issues like disc problems, tumors, or nerve conditions. No dye is used.

134 services107 patients

Nuclear medicine study from skull base to mid-thigh with ct scan 78815

A nuclear medicine study from skull base to mid-thigh with a CT scan involves using a small amount of radioactive material and CT imaging to examine body tissues and organs. This helps detect any abnormalities by providing detailed images of the body's internal structure.

125 services120 patients

Nuclear medicine study of bone and/or joint whole body 78306

A nuclear medicine study of bone and/or joint whole body involves injecting a small amount of radioactive material into your body. This material travels to your bones and emits energy. A special camera captures this energy, creating images of your bones to help identify any abnormalities.

122 services116 patients

Ct scan of abdomen and pelvis with contrast 74177

A CT scan of the abdomen and pelvis with contrast is an imaging procedure. A special dye, called contrast, is used to make certain areas more visible. This can help identify issues such as infections, tumors, or other abnormalities. The procedure is painless and usually takes about 30 minutes.

93 services93 patients

Ct scan of abdomen and pelvis without contrast 74176

A CT scan of the abdomen and pelvis is a non-invasive medical test. It uses special X-ray equipment to create detailed images of your abdominal and pelvic areas. This helps doctors examine organs, tissues, and vessels. No contrast dye is used in this procedure.

75 services75 patients

Nuclear medicine studies of heart muscle at rest and with stress and spect 78452

Nuclear medicine studies of the heart involve two parts: rest and stress. During rest, images are taken of your heart at ease. During stress, images are taken after exercise or medication-induced stress. SPECT is a special imaging technique providing 3D pictures of your heart, helping identify any issues.

73 services72 patients

Ct scan of blood vessels of chest with contrast 71275

A CT scan of the chest with contrast is a non-invasive imaging test. It uses X-rays and a special dye to get detailed images of your blood vessels in the chest. This helps in diagnosing conditions related to heart and lungs.

64 services64 patients

Mri scan of brain without contrast 70551

An MRI scan of the brain without contrast is a non-invasive imaging test. It uses a magnetic field and radio waves to create detailed images of your brain. It helps in detecting abnormalities like tumors, stroke, inflammation, or infection.

56 services35 patients

Nuclear medicine study of parathyroid with spect and ct scan 78072

A nuclear medicine study of the parathyroid with SPECT and CT scan is a diagnostic procedure. It uses a safe radioactive substance and imaging techniques to create detailed pictures of your parathyroid glands. These images help identify any abnormalities or diseases.

56 services55 patients

Mri scan of brain before and after contrast 70553

An MRI scan of the brain, both before and after contrast, helps visualize different brain structures. Initially, images are taken without a contrast agent. Then, a safe dye is injected which helps highlight certain areas, providing clearer, more detailed images.

55 services31 patients

Ct scan of upper spine without contrast 72125

A CT scan of the upper spine without contrast is a non-invasive imaging test that uses X-rays to capture detailed images of your neck and upper back. It helps in identifying issues like fractures, tumors, or infections. No dye (contrast) is used in this scan.

52 services52 patients

Mri scan of upper spinal canal without contrast 72141

An MRI scan of the upper spinal canal without contrast is a non-invasive imaging test. It uses a magnetic field and radio waves to create detailed images of your upper spine. This helps doctors identify issues such as injuries, infections or diseases. No dye is used.

51 services41 patients

Ct scan of chest without contrast 71250

A CT scan of the chest without contrast is a non-invasive imaging procedure. It uses special X-ray equipment to produce detailed images of your chest area, including your lungs and heart. It can help diagnose conditions such as lung diseases or heart disorders. It doesn't involve any dyes or contrast agents.

50 services50 patients

Ct scan of lower spine without contrast 72131

A CT scan of the lower spine without contrast is a non-invasive imaging test. It uses X-rays to create detailed images of your lower back area, helping to detect conditions like fractures, infections, or tumors. It's painless and generally quick.

48 services48 patients

Nuclear medicine study from skull base to mid-thigh with ct scan 78815

46 services44 patients

Ct scan of blood vessels of head with contrast 70496

A CT scan of the head's blood vessels with contrast is a diagnostic procedure. A special dye (contrast) is injected into your body to make the blood vessels visible on the scan. This helps identify issues like blockages or abnormalities in your head's blood vessels.

40 services40 patients

Nuclear medicine study of bone taken at different times 78315

A nuclear medicine bone study involves injecting a small amount of radioactive material into your body. This material collects in the bones and is detected by a special camera to create images. These images are taken at different times to track changes and help diagnose bone conditions.

40 services39 patients

X-ray of chest, 2 views 71046

A chest X-ray, 2 views, is a quick, painless test that creates pictures of the structures inside your chest, such as your heart, lungs, and blood vessels. Two different angles are used to get a comprehensive view. This helps in diagnosing conditions like pneumonia, heart problems, or lung cancer.

39 services38 patients

Nuclear medicine study of kidney, blood, flow, and function with drug administration 78708

This procedure helps analyze kidney function using a safe radioactive substance and special imaging. The substance is administered through an injection and travels to your kidneys. Images are then taken to assess blood flow and overall kidney function.

39 services34 patients

Ct scan of blood vessels of neck with contrast 70498

A CT scan of the neck's blood vessels with contrast is a diagnostic procedure. It uses X-rays and a special dye to create detailed images of your neck's blood vessels. This helps doctors detect issues such as blockages or abnormalities.

38 services38 patients

Ct scan of face without contrast 70486

A CT scan of the face without contrast is a non-invasive imaging procedure. It uses X-rays to create detailed pictures of your face, including bones, soft tissues, and blood vessels. It's often used to diagnose diseases, injuries, or abnormalities. No contrast dye is used in this procedure.

37 services37 patients

Complete ultrasound scan of abdomen 76700

A complete ultrasound scan of the abdomen is a non-invasive imaging procedure. It uses sound waves to produce images of the organs in your abdomen, such as the liver, gallbladder, spleen, pancreas, and kidneys. It helps in diagnosing, monitoring, and planning treatments.

36 services36 patients

Nuclear medicine study, spect imaging, 1 area or single acquisition, single day imaging 78803

A nuclear medicine study with SPECT involves a safe, small amount of radioactive substance to help visualize body organs. SPECT, or Single Photon Emission Computed Tomography, creates detailed 3D images. This helps doctors diagnose and monitor conditions in a specific body area.

30 services30 patients

Nuclear medicine study of stomach to assess emptying 78264

A nuclear medicine study of the stomach assesses how quickly food leaves the stomach. A safe, radioactive substance is added to a meal. The radiation emitted is tracked, creating images that show the food's progress through the stomach. It's non-invasive and painless.

29 services28 patients

Nuclear medicine study, whole body 78802

A whole-body nuclear medicine study involves a special camera and a small amount of radioactive material to visualize various body functions. The radioactive material, or tracer, shows how organs and tissues are working. This can help diagnose or monitor certain conditions.

28 services28 patients

X-ray of shoulder, minimum of 2 views 73030

An X-ray of the shoulder, with a minimum of 2 views, is a non-invasive imaging test. It uses a small amount of radiation to produce images of your shoulder bones. This helps in diagnosing conditions like fractures, arthritis, or other abnormalities. The procedure is quick and painless.

27 services26 patients

X-ray of abdomen, 1 view 74018

An X-ray of the abdomen, 1 view, is a quick and painless imaging test. It uses a small amount of radiation to produce images of the structures in your abdomen, such as the stomach, liver, and intestines. This can help identify issues like blockages, infections, or injuries.

24 services24 patients

Limited ultrasound scan of abdomen 76705

A limited ultrasound scan of the abdomen is a non-invasive imaging test. It uses sound waves to produce images of the abdominal organs such as the liver, gallbladder, spleen, pancreas, and kidneys. This helps to identify any abnormalities or issues.

22 services22 patients

Ct scan of blood vessels of abdomen and pelvis with contrast 74174

A CT scan of the abdomen and pelvis with contrast is a medical imaging procedure. A special dye, called contrast, is used to make blood vessels more visible. The scan produces detailed images of your abdomen and pelvis, helping doctors to diagnose conditions or plan treatments.

21 services21 patients

Mri scan of brain without contrast 70551

20 services20 patients

Mri scan of middle spinal canal without contrast 72146

An MRI scan of the middle spinal canal without contrast is a non-invasive imaging test. It uses magnetic fields and radio waves to create detailed images of your spine. This helps doctors identify any abnormalities or issues in your spinal canal. No dye is used in this procedure.

20 services16 patients

X-ray of hip, 2-3 views 73502

An X-ray of the hip with 2-3 views is a non-invasive imaging test. It uses a small amount of radiation to produce pictures of the hip joint. These images help in diagnosing conditions like fractures, arthritis, or other abnormalities. The process is quick and painless.

20 services20 patients

Nuclear medicine study of liver and bile duct system with use of drugs 78227

A nuclear medicine study of the liver and bile duct system involves injecting a safe, radioactive substance into the body. This substance helps create images of these areas on a special camera. It's often combined with drug use to improve image clarity and aid in diagnosing various conditions.

18 services18 patients

Ct scan of chest with contrast 71260

A CT scan of the chest with contrast is an imaging procedure. A special dye (contrast) is used to highlight specific areas in your body, providing clearer pictures of your chest. This helps in diagnosing conditions related to your lungs, heart, and other chest structures.

17 services17 patients

Nuclear medicine study of heart pumping function by labeling red blood cells with measurement of internal blood volume ejected with every beat over multiple cycles 78472

This procedure, known as a nuclear medicine study, examines your heart's function. It involves marking red blood cells and measuring the volume of blood your heart pumps with each beat. It's a safe, non-invasive way to assess how well your heart is working.

16 services11 patients

X-ray of pelvis, 1-2 views 72170

An X-ray of the pelvis, 1-2 views, is a quick and painless imaging test. It uses a small amount of radiation to produce images of the lower part of your torso. These images help to detect any abnormalities or injuries in your hip bones and surrounding structures.

15 services15 patients

Mri scan of lower spinal canal without contrast 72148

14 services14 patients

Nuclear medicine study whole body with ct scan 78816

A Nuclear Medicine Study with a CT Scan is a diagnostic procedure. It uses a small amount of radioactive substance and a CT scan to create detailed images of your body. These images help doctors diagnose, monitor, and treat various conditions.

14 services14 patients

X-ray of foot, minimum of 3 views 73630

An X-ray of the foot, minimum of 3 views, is a non-invasive imaging test. It uses a small amount of radiation to produce images of the bones and tissues in your foot. This helps to identify fractures, infections, or other abnormalities. Multiple views ensure a comprehensive examination.

13 services12 patients

Ultrasound study of one arm or leg veins with compression and maneuvers 93971

This is a non-invasive procedure using sound waves to visualize veins in an arm or leg. It involves applying gentle pressure and performing certain movements. It helps identify any abnormal blood flow or clots, ensuring vascular health.

13 services13 patients

Nuclear medicine study of thyroid and thyroid function 78014

A nuclear medicine study of the thyroid involves using a small amount of radioactive material to evaluate thyroid function. It helps identify issues such as overactive or underactive thyroid. The procedure is safe and provides valuable information about your thyroid health.

12 services12 patients

Ultrasound study of arm or leg veins with compression and maneuvers 93970

An ultrasound study of arm or leg veins with compression and maneuvers is a non-invasive procedure that uses sound waves to create images of your veins. This helps identify blood clots or other vein problems. During the procedure, pressure is applied to the veins and certain movements are performed to assess blood flow.

12 services12 patients

Ct scan of middle spine without contrast 72128

A CT scan of the middle spine without contrast is a non-invasive imaging test. It uses X-rays to create detailed pictures of your mid-spine area. This scan helps doctors identify issues like fractures, tumors, or infections. No dye is used in this procedure.

11 services11 patients

Mri scan of upper spinal canal without contrast 72141

11 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 19901 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$88.37 typical visit price

range $57.12 – $173.08

Typical copayment $22.09 (range $14.28 – $43.27)

Most-billed visit code 99203

Established Patient

$71.19 typical visit price

range $18.36 – $141.05

Typical copayment $17.79 (range $4.59 – $35.26)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

88.38/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored as part of a group practice

Quality

86.33

Improvement Activities

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.

JOHN MCARTOR

Pharmacist

640 S STATE ST
DOVER, DE 19901

Kent County (302) 744-7018

FRANCIS LIM MD

Internal Medicine

640 S STATE ST
DOVER, DE 19901

Kent County (419) 276-1194

SUMUKH ARUN KUMAR MD

Internal Medicine (Hematology & Oncology)

640 S STATE ST
DOVER, DE 19901

Kent County (302) 674-4700

ABIGAIL KOZHUHAROV

Nurse Practitioner (Acute Care)

640 S STATE ST
DOVER, DE 19901

Kent County (302) 674-4700

SAFWAN MUHAMMAD MD

Internal Medicine

640 S STATE ST
DOVER, DE 19901

Kent County (879) 022-5410

MS. REBECCA SUZANNE ANTAL PA-C

Physician Assistant

640 S STATE ST
DOVER, DE 19901

Kent County (302) 674-4700

DONNA MARIE SHORT R.PH.

Pharmacist

640 S STATE ST, PHARMACY
DOVER, DE 19901

Kent County (302) 744-7018

MARY KATHERINE TROYER RN

Registered Nurse (Critical Care Medicine)

640 S STATE ST
DOVER, DE 19901

Kent County (302) 674-4700

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 Vijay Viswanathan's NPI number?

The NPI number for Vijay Viswanathan is 1982792818. It was assigned to this individual provider in the NPPES registry on October 10, 2006.

Where is Vijay Viswanathan located?

Vijay Viswanathan practices at 640 S State St, Dover, DE 19901. The listed phone number is (302) 480-1688.

What is Vijay Viswanathan's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.

Is Vijay Viswanathan enrolled in Medicare?

Yes. Vijay Viswanathan is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Vijay Viswanathan's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Vijay Viswanathan reassigns Medicare benefits to 13 organizations: Bayhealth Radiologists LLC (Dover, DE), Kent Diagnostic Radiology Associates PA (Dover, DE), Lenox Hill Radiology & Medical Imaging Associates, PC (New York, NY), Solano Diagnostics Partners, A Calif Limted Partnership (Chino Hills, CA), Bay Imaging Consultants Medical Group Inc (Brentwood, CA) and 8 more organizations, listed in the Medicare section above. Each 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 Vijay Viswanathan'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 Vijay Viswanathan was last updated on November 30, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.