DR. NATALIE LEILA SIVAK M.D.
NPI 1891943023
Radiology - Diagnostic Radiology in Denver, CO

Active since August 29, 2008PECOS EnrolledAccepts Medicare Assignment
2045 N FRANKLIN ST, DENVER, CO 80205(303) 338-4545 Get Directions Write a Review

NPPES record last updated: March 16, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Mar 16, 2026, Jan 12, 2022, Dec 16, 2021 and 1 more (4 updates tracked since 2020).

About Dr. Natalie Leila Sivak M.d. NPPES

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

DR. NATALIE LEILA SIVAK M.D. (NPI 1891943023) is an individual diagnostic radiology provider in Denver, Colorado, licensed in Colorado (DR.0067493) and active in the NPI registry since August 2008. She is enrolled in Medicare PECOS and is a graduate of University Of Oklahoma College Of Medicine (2004).

NPPES Registry Identity

NPI1891943023
Entity TypeIndividualFemale
Primary Taxonomy2085R0202X
Provider Legal NameDR. NATALIE LEILA SIVAKCredential: M.D.
Location Address2045 N FRANKLIN STDenver, CO 80205-5437
Mailing Address10350 E Dakota AveDenver, CO 80247-1314
Sole ProprietorNo
Medical School CMSUniversity Of Oklahoma College Of MedicineGraduated 2004
Enumeration DateAugust 29, 2008
Last NPPES UpdateMarch 16, 20264 updates tracked since enumeration
NPPES CertifiedMarch 16, 2026
NPI 1891943023 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyRadiology · Diagnostic RadiologyAllopathic & Osteopathic Physicians
Taxonomy Code2085R0202X
Licenses Licensed in CO · DR.0067493 Licensed in NC · 2008-01479 Licensed in TX · N1150
Definition
A radiologist who utilizes x-ray, radionuclides, ultrasound and electromagnetic radiation to diagnose and treat disease.
2045 N FRANKLIN ST, Denver, CO 80205

Other Names 1

Former Name (1)Natalie L Mange

Other Identifiers 1

Medicaid9000199883CO

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. Natalie Leila Sivak 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 ID8527118496
PECOS Enrollment IDI20220105000975
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 27

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 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.
323 services311 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.
231 services190 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.
135 services131 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.
96 services95 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.
74 services72 patients
Complete ultrasound scan behind abdominal cavity 76770
A complete ultrasound scan behind the abdominal cavity is a non-invasive imaging procedure. It uses sound waves to create pictures of the structures and organs located at the back of your abdomen. It helps in diagnosing health conditions and monitoring ongoing treatments.
68 services66 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 80205 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
$89.43 typical visit price
range $58.06 – $174.82
Typical copayment $22.35 (range $14.51 – $43.70)
Most-billed visit code 99203
Established Patient
$72.20 typical visit price
range $18.88 – $142.79
Typical copayment $18.05 (range $4.72 – $35.69)
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.

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.

Radiology (Diagnostic Radiology)
2045 N FRANKLIN ST
DENVER, CO 80205
Nurse Practitioner (Family)
2045 N FRANKLIN ST
DENVER, CO 80205
Audiologist
2045 N FRANKLIN ST
DENVER, CO 80205
Internal Medicine (Hematology & Oncology)
2045 N FRANKLIN ST
DENVER, CO 80205
Nurse Practitioner (Family)
2045 N FRANKLIN ST
DENVER, CO 80205
Registered Nurse
2045 N FRANKLIN ST
DENVER, CO 80205
Anesthesiology
2045 N FRANKLIN ST
DENVER, CO 80205
Registered Nurse (Oncology)
2045 N FRANKLIN ST
DENVER, CO 80205

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 Natalie Sivak's NPI number?

The NPI number for Natalie Sivak is 1891943023. It was assigned to this individual provider in the NPPES registry on August 29, 2008. The provider is also known as Natalie L Mange.

Where is Natalie Sivak located?

Natalie Sivak practices at 2045 N Franklin St, Denver, CO 80205. The listed phone number is (303) 338-4545.

What is Natalie Sivak's specialty?

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

Is Natalie Sivak enrolled in Medicare?

Yes. Natalie Sivak 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.

When was this NPI record last updated?

The NPPES record for Natalie Sivak was last updated on March 16, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 months 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.