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

Dr. Andrew John Maclennan, MD

Individual provider Hospitalist Physician · NPI 1649430596

Dr. Andrew John Maclennan, MD is an Internal Medicine in Denver, Colorado. Graduated from Washington University School of Medicine in 2008, 18 years ago. Practices with Colorado Permanente Medical Group PC, a 1,325-clinician group and accepts Medicare assignment. Licensed in Colorado and North Carolina.

Years since qualifying
18
Trained at
Washington University School of Medicine
Licensed in
CO, NC
In the registry since
2008
Specialties on file
3
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

1719 E 19th Ave
Denver, CO 80218-1235
Phone: (303) 338-4545
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Hospitalist Physician (primary) Taxonomy 208M00000X · Licence 49625 (CO)
Internal Medicine Physician Taxonomy 207R00000X · Licence 49625 (CO)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X · Licence 150188 (NC)

Record details

NPI number1649430596
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 13, 2008
Last updated in NPPESJuly 27, 2026
Certification dateJuly 27, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Medical schoolWASHINGTON UNIVERSITY SCHOOL OF MEDICINE
Graduated 2008 (18 years in practice)
Group practice Colorado Permanente Medical Group Pc — 1325 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations6 on file with Medicare

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