Physician Profile
Natalie L. Sivak, M.D.
Unclaimed ProfileAbout Dr. Sivak
Based in Denver, CO, Natalie L. Sivak, M.D. is listed in the NPI registry under diagnostic radiology. Natalie graduated from University of Oklahoma College of Medicine in 2004. Medicare claims data shows Natalie provided 1,574 services to 1,502 patients. The services billed most often include ct scan of abdomen and pelvis with contrast, x-ray of abdomen, 1 view, and ct scan of chest with contrast.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it — free, and no identity document with a practice or institutional email.
Education & Training
Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (303) 338-4545
- Email not available
Practice Locations
2045 N FRANKLIN ST
Denver, CO 80205
12605 E 16th Ave
Aurora, CO 80045
Conditions Evaluated or Diagnosed
Within Diagnostic Radiology generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Abdomen & Pelvis
- Abdominal Pain
- Appendicitis
- Diverticulitis
- Enlarged prostate
- Gallstones
- Kidney stones
- Liver Lesions
- Ovarian cysts
Bone & Joint
- Ankle Sprain or Fracture
- Bone fractures
- Heel pain
- Hip osteoarthritis
- Osteoporosis
- Rotator cuff tear
- Torn meniscus
Brain & Head
- Brain aneurysm
- Brain tumor
- Concussion in Children
- Migraines
- Sinus infection
- Transient ischemic attack
Brain & nerves
Breast
Chest & Heart
General
Heart & blood vessels
Joint & bone
Liver & digestion
Lungs & breathing
Men's health
Neck & Thyroid
Nerve pain
Pelvic health
Spine
Spine & back
Vascular
Women's health
Procedures & services
Abdominal imaging
Biopsies
Bone Density
Breast Imaging
CT Scan
Digestive & liver
Fluoroscopy
General imaging
Heart & blood vessels
Joint & bone
MRI
Nuclear Medicine
Pelvic imaging
Screening & Prevention
Spine & back
Ultrasound
- Abdominal Ultrasound
- Carotid Ultrasound
- Leg Vein Ultrasound
- Pelvic ultrasound
- Scrotal Ultrasound
- Thyroid ultrasound
- Ultrasound
Urinary & kidney
Women's health
X-Ray
Procedures Most Often Billed to Medicare
1,574 services · 1,502 patients · 25 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Ct scan of abdomen and pelvis with contrast | Imaging | 74177 |
323 | More often than most peers in Diagnostic Radiology |
| X-ray of abdomen, 1 view | Imaging | 74018 |
231 | More than most peers in Diagnostic Radiology |
| Ct scan of chest with contrast | Imaging | 71260 |
135 | More often than most peers in Diagnostic Radiology |
| Ct scan of abdomen and pelvis without contrast | Imaging | 74176 |
74 | As often as other peers in Diagnostic Radiology |
| Complete ultrasound scan behind abdominal cavity | Imaging | 76770 |
68 | More often than most peers in Diagnostic Radiology |
| Complete ultrasound scan of abdomen | Imaging | 76700 |
63 | More often than most peers in Diagnostic Radiology |
| Mri scan of abdomen before and after contrast | Imaging | 74183 |
61 | As often as other peers in Diagnostic Radiology |
| Mri scan of pelvis before and after contrast | Imaging | 72197 |
58 | As often as other peers in Diagnostic Radiology |
| Ultrasound scan of head and neck soft tissue | Imaging | 76536 |
57 | More often than most peers in Diagnostic Radiology |
| Limited ultrasound scan of abdomen | Imaging | 76705 |
47 | As often as other peers in Diagnostic Radiology |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other radiologists at this location 2
Same specialty, same street address — most likely the same department or group.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other radiologists in Denver 6
Same specialty, same city.
More connections — 23 related providers in 3 groups
Trained at University of Oklahoma College of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 2004 at University of Oklahoma College of Medicine 7
Providers who graduated from the same medical school in the same year.
Also performs Ct scan of abdomen and pelvis with contrast 8
Providers in CO who bill this service to Medicare most often.
Common questions
What does Natalie L. Sivak specialize in?
Natalie L. Sivak is a radiologist in Denver, CO. That is the designation recorded for this NPI in the federal registry, where it is listed as “Diagnostic Radiology”.
NPI registry
Where is Natalie L. Sivak located?
Natalie L. Sivak is listed at 2045 N Franklin St, Denver, CO 80205. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Natalie L. Sivak's phone number?
The number on file is (303) 338-4545. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Natalie L. Sivak?
Natalie L. Sivak's National Provider Identifier is 1891943023. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Natalie L. Sivak train?
Natalie L. Sivak attended University of Oklahoma College of Medicine, graduating in 2004. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Natalie L. Sivak have?
Natalie L. Sivak has 22 years experience. Calculated from a graduation year of 2004, reported in the CMS National Downloadable File.
CMS public data
What does Natalie L. Sivak do most often?
According to Medicare billing data, Natalie L. Sivak performs imaging including ct scan of abdomen and pelvis with contrast and x-ray of abdomen, 1 view; provides treatments such as ultrasound study of one arm or leg veins with compression and maneuvers and ultrasound study of arm or leg veins with compression and maneuvers. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Natalie L. Sivak's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Natalie L. Sivak. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.