NPPES file of Aug 9, 2026

Natalie Leila Sivak, M.D.

Diagnostic Radiology Physician · Denver, CO

Natalie Leila Sivak, M.D. is a diagnostic radiology physician with a practice address in Denver, Colorado, and NPI 1891943023, issued on Aug 29, 2008. Check the license (Colorado DR.0067493, as entered in NPPES) on the Colorado Medical Board; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1891943023
Name
Natalie Leila Sivak
Credential
M.D.
Primary taxonomy
Diagnostic Radiology Physician 2085R0202X
License numbers
DR.0067493 CO
2008-01479 NC
N1150 TX
Self-reported in NPPES; status is on the state search
Practice location
2045 N Franklin St, Denver, CO 80205
Phone
(303) 338-4545
Enumerated
Aug 29, 2008
Record last updated
Mar 16, 2026
Medicaid ID
9000199883 CO
Medicare enrollment
Enrolled (PECOS I20220105000975); accepts Medicare assignment
Medical or professional school
University Of Oklahoma College Of Medicine, 2004
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest diagnostic radiology physician records → All 796 in Colorado → Look up another NPI →

Also registered at 2045 N Franklin St

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Joseph Abruzzo, M.D.Cardiovascular Disease Physician1336276385
  2. Alicia Adams, O.D.Optometrist1790072643
  3. Gareth Adams, MDNeurological Surgery Physician1750611158
  4. Alison Agner, M.D.Obstetrics & Gynecology Physician1467662833
  5. Adele Alcocer, RN BSNRegistered Nurse1285176495
  6. Leonardo Alfaro, M.D.Surgery Physician1326251398

Verify Natalie Leila Sivak in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersColorado Medical Board
    Search for license DR.0067493    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Colorado license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Bills Medicare through 2 group practices

  1. Uchealth Imaging Services LLCHighlands Ranch, CO
  2. University Physicians IncorporatedAurora, CO

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Natalie Leila Sivak among 796 diagnostic radiology physician records in Colorado

Natalie Leila Sivak, M.D. is one of 796 diagnostic radiology physician records with a practice address in Colorado. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 61% of them.

  • NPI issued2008 · 61% of these records are older, 34% newer
  • In a Medicare fileYes · 75% of these records are
  • In the CMS Doctors and Clinicians fileYes · 71% of these records are
  • Graduated2004 · median 2006 among the 562 with a school on file
  • Record last updated2026 · 47% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0202X and a Colorado practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Diagnostic Radiology Physician providers in Colorado

There are 796 diagnostic radiology physician records in Colorado.

All 796 in Colorado → Every provider in Denver → Diagnostic Radiology Physician nationwide →

The 8 diagnostic radiology physician records with the nearest ZIP codes

  1. Kim Adcock, MDDenver, CO 802051477696920
  2. Robert Congdon, MDDenver, CO 802051699839522
  3. Geoffrey Friefeld, M.D.Denver, CO 802051922141472
  4. Darwin Kuhlmann, M.D.Denver, CO 802051316080401
  5. Gerald Lourie, M.D.Denver, CO 802051235273020
  6. Kristin McKinney, MDDenver, CO 802051235214867
  7. Peter Rackow, M.D.Denver, CO 802051568506269
  8. Bernedette Saccomanno, MDDenver, CO 802051437192705

Common questions

What is Natalie Leila Sivak, M.D.'s NPI number?

Natalie Leila Sivak, M.D.'s National Provider Identifier (NPI) is 1891943023, issued on Aug 29, 2008. An NPI identifies a provider in billing; it is not a license.

Where is Natalie Leila Sivak, M.D. located?

The NPPES record lists a practice address at 2045 N Franklin St, Denver, CO, 80205. Phone: (303) 338-4545. Providers update this record themselves, so call before visiting.

How can I verify Natalie Leila Sivak, M.D.'s license?

NPPES lists Colorado license number DR.0067493, as entered by the provider. Search the Colorado Medical Board at https://dpo.colorado.gov/Medical. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.