Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. Natalie Leila Sivak, MD

Individual provider Diagnostic Radiology Physician · NPI 1891943023

Dr. Natalie Leila Sivak, MD practises Diagnostic Radiology in Denver, Colorado. Graduated from University of Oklahoma College of Medicine in 2004, 22 years ago. Practices with University Physicians Incorporated, a 3,148-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Colorado, North Carolina and Texas.

Years since qualifying
22
Trained at
University of Oklahoma College of Medicine
Licensed in
CO, NC, TX
In the registry since
2008
Specialties on file
3
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

2045 N Franklin St
Denver, CO 80205-5437
Phone: (303) 338-4545
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 12605 E 16th Ave, Aurora, CO 80045-2545 — (720) 848-0000

Specialties & licences

Diagnostic Radiology Physician (primary) Taxonomy 2085R0202X · Licence DR.0067493 (CO)
Diagnostic Radiology Physician Taxonomy 2085R0202X · Licence 2008-01479 (NC)
Diagnostic Radiology Physician Taxonomy 2085R0202X · Licence N1150 (TX)

Record details

NPI number1891943023
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 29, 2008
Last updated in NPPESMarch 16, 2026
Certification dateMarch 16, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyDIAGNOSTIC RADIOLOGY
Also practisesINTERVENTIONAL RADIOLOGY, NUCLEAR MEDICINE
Medical schoolUNIVERSITY OF OKLAHOMA COLLEGE OF MEDICINE
Graduated 2004 (22 years in practice)
Group practice University Physicians Incorporated — 3148 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients1,293
Services billed 1,765 a service is one billed item, such as a visit, a test or a procedure
Average patient age72

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at University Physicians Incorporated

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 3148 clinicians in the practice; 12 are shown here.

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