OMAR NABIL KALLAS M.D.
NPI 1003201336
Radiology - Diagnostic Radiology in Atlanta, GA

Active since April 03, 2015PECOS EnrolledAccepts Medicare Assignment
81.31/100
CMS Quality Rating
1364 CLIFTON ROAD, DEPARTMENT OF RADIOLOGY AND IMAGING SCIENCES, ATLANTA, GA 30322(404) 778-3900 Get Directions Write a Review

NPPES record last updated: June 10, 2020. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jun 10, 2020, Feb 15, 2020 (2 updates tracked since 2020).

About Omar Nabil Kallas M.d. NPPES

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

OMAR NABIL KALLAS M.D. (NPI 1003201336) is an individual diagnostic radiology provider in Atlanta, Georgia, licensed in Georgia (84802) and active in the NPI registry since April 2015. He is enrolled in Medicare PECOS and is a graduate of Other (2015).

NPPES Registry Identity

NPI1003201336
Entity TypeIndividualMale
Primary Taxonomy2085R0202X
Provider Legal NameOMAR NABIL KALLASCredential: M.D.
Location Address1364 CLIFTON ROAD, DEPARTMENT OF RADIOLOGY AND IMAGING SCIENCESAtlanta, GA 30322
Mailing Address1364 Clifton Rd Ne, Department Of Radiology And Imaging SciencesAtlanta, GA 30322-1059
Sole ProprietorNo
Medical School CMSOtherGraduated 2015
Enumeration DateApril 3, 2015
Last NPPES UpdateJune 10, 20202 updates tracked since enumeration
NPPES CertifiedJune 10, 2020
✔ NPI 1003201336 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyRadiology · Diagnostic RadiologyAllopathic & Osteopathic Physicians
Taxonomy Code2085R0202X
License✔ Licensed in GA · 84802
Definition
A radiologist who utilizes x-ray, radionuclides, ultrasound and electromagnetic radiation to diagnose and treat disease.
1364 CLIFTON ROAD, Atlanta, GA 30322

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

Omar Nabil Kallas M.d. 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 ID1850703760
PECOS Enrollment IDI20210803002696
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

18

Medicare enrollment records show Omar Kallas reassigns Medicare billing to 18 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Diagnostic Radiology
200 W ACADEMY STREET
Gainesville, GA 30501
  • Reassigned Medicare billing, California enrollment
  • 11 clinicians in this Medicare group
Diagnostic Radiology
2600 PARK AVE. , SUITES # 101 & 203
Concord, CA 94520
  • Reassigned Medicare billing, California enrollment
  • 238 clinicians in this Medicare group
Diagnostic Radiology
72855 FRED WARING DR
Palm Desert, CA 92260
  • Reassigned Medicare billing, California enrollment
  • 278 clinicians in this Medicare group
Radiology
222 E MAIN ST, SUITES 213 & 214
Barstow, CA 92311
  • Reassigned Medicare billing, California enrollment
  • Also billed through NPI 1114112372 (California)
  • 335 clinicians in this Medicare group
Family Medicine
211 13TH ST
Ramona, CA 92065
  • Reassigned Medicare billing, California enrollment
  • 144 clinicians in this Medicare group
Radiology
765 MEDICAL CENTER COURT
Chula Vista, CA 91911
  • Reassigned Medicare billing, California enrollment
  • 51 clinicians in this Medicare group
Diagnostic Radiology
751 MEDICAL CENTER CT, SHARP CHULA VISTA MEDICAL CENTER
Chula Vista, CA 91911
  • Reassigned Medicare billing, California enrollment
  • Medicare enrollment name: San Diego Diagnostic Radiology Medical Group Inc
  • 71 clinicians in this Medicare group
Clinic/Center
7910 FROST STREET, SUITE 100
San Diego, CA 92123
  • Reassigned Medicare billing, California enrollment
  • 39 clinicians in this Medicare group
Radiology
590 S FAIR OAKS AVE STE 143
Pasadena, CA 91105
  • Reassigned Medicare billing, California enrollment
  • 71 clinicians in this Medicare group
General Practice
1520 SAN PABLO ST
Los Angeles, CA 90033
  • Reassigned Medicare billing, California enrollment
  • 2,445 clinicians in this Medicare group

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 64

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, gadoterate meglumine, 0.1 ml A9575
Gadoterate meglumine is a contrast agent used in MRI scans to help visualize certain areas of your body more clearly. It's injected into your bloodstream, typically through a vein in your arm, and helps doctors get more detailed images.
34,140 services201 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.
1,055 services955 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.
434 services428 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.
294 services287 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.
221 services219 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.
192 services189 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 30322 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
$88.06 typical visit price
range $56.84 – $172.43
Typical copayment $22.01 (range $14.21 – $43.10)
Most-billed visit code 99203
Established Patient
$70.85 typical visit price
range $18.22 – $140.40
Typical copayment $17.71 (range $4.55 – $35.10)
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.

81.31/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Individually scored
Quality90
Improvement Activities0
Cost72.71

Other Providers at the Same Location NPPES 5

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

Student in an Organized Health Care Education/Training Program
1364 CLIFTON ROAD
ATLANTA, GA 30322
Student in an Organized Health Care Education/Training Program
1364 CLIFTON ROAD
ATLANTA, GA 30322
Student in an Organized Health Care Education/Training Program
1364 CLIFTON ROAD
ATLANTA, GA 30322
Student in an Organized Health Care Education/Training Program
1364 CLIFTON ROAD
ATLANTA, GA 30322
Student in an Organized Health Care Education/Training Program
1364 CLIFTON ROAD
ATLANTA, GA 30322

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 Omar Kallas's NPI number?

The NPI number for Omar Kallas is 1003201336. It was assigned to this individual provider in the NPPES registry on April 3, 2015.

Where is Omar Kallas located?

Omar Kallas practices at 1364 Clifton Road Department Of Radiology And Imaging Sciences, Atlanta, GA 30322. The listed phone number is (404) 778-3900.

What is Omar Kallas's specialty?

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

Is Omar Kallas enrolled in Medicare?

Yes. Omar Kallas 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 organizations bill Medicare for Omar Kallas's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Omar Kallas reassigns Medicare benefits to 18 organizations: Gainesville Radiology Group, PC (Gainesville, GA), Norcal Imaging (Concord, CA), Desert Advanced Imaging Medical Center (Palm Desert, CA), Beverly Radiology Medical Group III (Barstow, CA), Arch Health Partners (Ramona, CA) and 13 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 Omar Kallas'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 Omar Kallas was last updated on June 10, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.