Dr. Stephen Douglas Haley , MD
Internal Medicine • Longmont, CO
Professional Overview & Biography Verified Profile Summary
Dr. Stephen Haley, MD is a certified Internal Medicine practicing in Longmont, CO. With approximately 28 years of clinical experience since graduating from University Of Colorado School Of Medicine, Denver in 1998, Dr. Haley delivers high-quality medical care to the local community at 2345 BENT WAY.
Dr. Haley is affiliated with Colorado Permanente Medical Group Pc and accepts Medicare assignment.
Practice Location & Contact Primary Location
2345 Bent Way
Longmont, CO 805037614
Medicare Profile & Education
University Of Colorado School Of Medicine, Denver
1998
✓ Accepts Assignment
In-Person Only
Specialty Benchmarks & Practice Insights
Comparative analytics for Internal Medicine in Longmont, CO
Practicing in Longmont, CO (2124 Statewide)
In-Person Office Visits Only
Under CMS Medicare Fee Schedule vs Standard Submitted Charges
Clinical Seniority & Experience Comparison
Medical Specialties & State Licenses
CMS Verified: 2025-10-16NUCC Taxonomy Code: 207R00000X
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
NUCC Taxonomy Code: 2083P0500X
A preventive medicine physician who specializes in preventive medicine/occupational-environmental medicine, which is focused on protecting the population from occupational and environmental conditions.
Additional State Medicaid & Healthcare Payer Identifiers
Hospital & Practice Group Affiliations
Colorado Permanente Medical Group Pc
10350 E Dakota Avenue C, Denver, CO 802471314
Phone: 3033384545
Colorado Permanente Medical Group Pc
10350 E Dakota Ave, Denver, CO 802471314
Colorado Permanente Medical Group Pc
10350 E Dakota Avenue B, Denver, CO 802471314
Phone: 3033384545
Colorado Permanente Medical Group Pc
10350 E Dakota Ave, Denver, CO 802471314
Phone: 3033384545
Colorado Permanente Medical Group Pc
2345 Bent Way, Longmont, CO 805037614
Phone: 3033384545
Practice Associates & Co-Workers
Healthcare professionals and specialists practicing at this location or sharing practice phone/fax
Radiology - Diagnostic Radiology
Doctor of Medicine (M.D.), Doctor of Philosophy (Ph.D.)
Internal Medicine
Doctor of Medicine (M.D.)
Hospitalist
Doctor of Medicine (M.D.)
Registered Nurse
Registered Nurse
Counselor - Professional
Licensed Professional Counselor
Physician Assistant
Physician Assistant (Certified)
Career & Practice History Timeline
Chronological log of verified NPI updates, location relocations, credentials, and registry changes
Registered at 2345 BENT WAY, LONGMONT, CO 805037614 (Tel: 3033384545)
Recorded as STEPHEN HALEY, MD
Registered at 10350 E DAKOTA AVE, DENVER, CO 802471314 (Tel: 3033384545)
Registered at 10350 E DAKOTA AVE, DENVER, CO 802471314
Registered at 2500 S HAVANA ST, AURORA, CO 800141618 (Tel: 3033384545)
NPI status registered as active in NPPES database
Registered at 2345 BENT WAY, LONGMONT, CO 805037614 (Tel: 3033384545)
Registered at 2345 BENT WAY, LONGMONT, CO 805037614 (Tel: 3033384545)
Recorded as STEPHEN HALEY
Internal Medicine (License #38354 in CO)
First registered as active Individual Practitioner in NPPES Database.
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NPI Administrative Meta
Mailing Address
10350 E Dakota Ave
Denver, CO 802471314
This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.