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

Robert R Fierer, MD

Individual provider Addiction Medicine (Internal Medicine) Physician · NPI 1477550960

Robert R Fierer, MD is an Addiction Medicine (Internal Medicine) Physician in Northglenn, Colorado. Practices as a sole proprietor. Licensed in Colorado and Pennsylvania.

Licensed in
CO, PA
In the registry since
2005
Specialties on file
4
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

10050 Ralston Rd # 1 - B/e
Northglenn, CO 80233-4974
Phone: (720) 401-2340
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence MD035627L (PA)
Addiction Medicine (Internal Medicine) Physician Taxonomy 207RA0401X · Licence DR.0049839 (CO)
Community/Behavioral Health Agency Taxonomy 251S00000X · Licence AF6214960 (CO)
Internal Medicine Physician Taxonomy 207R00000X · Licence DR.0049839 (CO)

Record details

NPI number1477550960
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJune 30, 2005
Last updated in NPPESFebruary 10, 2023
Certification dateFebruary 3, 2023