1. Home
  2. Directory
  3. Kentucky
  4. Louisville
  5. Radiology
  6. NPI Profile
Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. JOHN VASILIOS DENNISON MD
NPI 1619339058
Radiology - Neuroradiology in Louisville, KY

Active since March 24, 2016PECOS Enrolled
92.26/100
CMS Quality Rating
231 E CHESTNUT ST, LOUISVILLE, KY 40202(502) 629-7650(502) 629-7663 Get Directions Write a Review

NPPES record last updated: August 4, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Aug 4, 2026, Jul 7, 2022, Jul 6, 2021 and 1 more (4 updates tracked since 2016).

About Dr. John Vasilios Dennison Md NPPES

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

DR. JOHN VASILIOS DENNISON MD (NPI 1619339058) is an individual neuroradiology provider in Louisville, Kentucky, licensed in Georgia (92623) and active in the NPI registry since March 2016. He is enrolled in Medicare PECOS, is affiliated with Emory University Hospital, and maintains a secondary practice location in Atlanta.

NPPES Registry Identity

NPI1619339058
Entity TypeIndividualMale
Primary Taxonomy2085N0700X
Provider Legal NameDR. JOHN VASILIOS DENNISONCredential: MD
Location Address231 E CHESTNUT STLouisville, KY 40202-1821
Mailing AddressPo Box 776879Chicago, IL 60677-6879 · (502) 588-9490 · Fax (502) 272-5116
Phone(502) 629-7650
Fax(502) 629-7663
Sole ProprietorNo
Medical School CMSOtherGraduated 2016
Enumeration DateMarch 24, 2016
Last NPPES UpdateAugust 4, 20264 updates tracked since enumeration
NPPES CertifiedAugust 4, 2026
✔ NPI 1619339058 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyRadiology · NeuroradiologyAllopathic & Osteopathic Physicians
Taxonomy Code2085N0700X
License✔ Licensed in GA · 92623
Definition
A radiologist who diagnoses and treats diseases utilizing imaging procedures as they relate to the brain, spine and spinal cord, head, neck and organs of special sense in adults and children.
Also ListedRadiology · Diagnostic RadiologyTaxonomy 2085R0202X · License 01100895A (IN), C6044 (KY), RTL21-0600 (NC)
231 E CHESTNUT ST, Louisville, KY 40202
Open in Google Maps ↗

Secondary Practice Location 1

Location 11405 Clifton Rd NEAtlanta, GA 30322-4607 · Phone (404) 785-5437

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. John Vasilios Dennison Md 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 ID840586798
PECOS Enrollment IDI20220923002419
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.

Areas of Expertise CMS Part B claims 5

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.

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.
65 services61 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.
29 services29 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.
17 services17 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.
16 services16 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.
15 services15 patients

Hospital Affiliations CMS Care Compare 2

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Emory University Hospital

Acute Care Hospitals · Atlanta, GA
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number110010
Location1364 Clifton Road, NEAtlanta, GA 30322 · De Kalb County
Emergency services

Emory University Hospital Midtown

Acute Care Hospitals · Atlanta, GA
2/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number110078
Location550 Peachtree Street, NEAtlanta, GA 30308 · Fulton County
Emergency services Birthing friendly

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.

92.26/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored through an Alternative Payment Model
Quality73.83
Promoting Interoperability100
Improvement Activities40

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.

HERON BAUMGARTEN
Surgery
231 E CHESTNUT ST
LOUISVILLE, KY 40202
Jefferson County (502) 588-0390
SHELBYE M SCHWEINHART
Pediatrics
231 E CHESTNUT ST
LOUISVILLE, KY 40202
Jefferson County (502) 588-0982
CYNTHIA ROMER FATA M.D.
Pathology (Anatomic Pathology & Clinical Pathology)
231 E CHESTNUT ST
LOUISVILLE, KY 40202
Jefferson County (502) 456-6211
OLIVIA F MITTEL MD
Pediatrics
231 E CHESTNUT ST
LOUISVILLE, KY 40202
Jefferson County (502) 629-6000
ELIZABETH LEHTO
Pediatrics (Pediatric Emergency Medicine)
231 E CHESTNUT ST
LOUISVILLE, KY 40202
Jefferson County (502) 629-6000
MICHELE NICOLE BRESLER SNOW DO
Pediatrics
231 E CHESTNUT ST
LOUISVILLE, KY 40202
Jefferson County (502) 629-6000
JESSICA EARLINE LUVISI CRNA
Nurse Anesthetist, Certified Registered
231 E CHESTNUT ST
LOUISVILLE, KY 40202
Jefferson County (502) 629-6000
TRACE ROBERTSON KIMLER
Pediatrics
231 E CHESTNUT ST
LOUISVILLE, KY 40202
Jefferson County (502) 629-6000

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 John Dennison's NPI number?

The NPI number for John Dennison is 1619339058. It was assigned to this individual provider in the NPPES registry on March 24, 2016.

Where is John Dennison located?

John Dennison practices at 231 E Chestnut St, Louisville, KY 40202. The listed phone number is (502) 629-7650.

What is John Dennison's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Neuroradiology, with taxonomy code 2085N0700X.

Is John Dennison enrolled in Medicare?

Yes. John Dennison 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.

Is John Dennison affiliated with any hospitals?

According to CMS data, John Dennison is affiliated with Emory University Hospital and Emory University Hospital Midtown.

When was this NPI record last updated?

The NPPES record for John Dennison was last updated on August 4, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 days 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.