Marshelle S. Warren, MD
Listed as an allergist, with a practice address in Boulder, Colorado.
This record may be out of date. The doctor’s record in the national provider registry hasn’t been updated since 2015, and they don’t appear in current Medicare records. They may have moved or retired. Call before you go.
Practice location 1
1460 Ithaca Dr
Boulder, CO 80305
From the records
- Specialty
- Allergist
- Records
- National provider registry only, not updated since 2015. May have moved or retired.
- Registry record
- Last updated May 2015
- NPI
- 1669859161 (national provider registry)
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From CMS’s Doctors and Clinicians file (October 2026) and the national provider registry, NPPES (October 2026). Listings are free and in alphabetical order; we don’t rate or recommend doctors. How we list doctors