Quick answers
- Does Loretta S. Sullivan-Chang accept Medicare assignment?
- Yes. Medicare's clinician data says Loretta S. Sullivan-Chang accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- What is Loretta S. Sullivan-Chang's NPI number?
- 1972780062. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Loretta S. Sullivan-Chang is enrolled with Medicare (CMS data updated October 2, 2026).
- 1360 S Potomac StAurora, CO 80012 (303) 337‑5575
Group practices
Medicare enrollment lists Loretta S. Sullivan-Chang as a member of this group (CMS data updated October 2, 2026).
- Mauricio Waintrub, M.D., P.C26 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Aurora
Clinicians with the same Medicare primary specialty in Aurora, CO — not a recommendation.
Other clinicians in Mauricio Waintrub, M.D., P.C
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Colorado School Of Medicine, Denver |
| Graduation year | 2005 (21 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1972780062 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians