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

Dr. Ryan Lee Rathjen, MD

Individual provider Anesthesiology Physician · NPI 1437245057

Dr. Ryan Lee Rathjen, MD is an Anesthesiology in Aurora, Colorado. Graduated from Sanford School of Medicine of University of South Dakota in 2001, 25 years ago. Practices with CHI Health Clinic Physician Enterprise-Anesthesia LLC, a 221-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Colorado and Nebraska.

Years since qualifying
25
Trained at
Sanford School of Medicine of University of South Dakota
Licensed in
CO, NE
In the registry since
2006
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

12605 E 16th Ave
Aurora, CO 80045-2545
Phone: (720) 848-0000
Show map & directions

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

Additional practice locations (1)

  • 9395 Crown Crest Blvd, Parker, CO 80138-8573 — (303) 422-9438

Specialties & licences

Anesthesiology Physician (primary) Taxonomy 207L00000X · Licence 53399 (CO)
Critical Care Medicine (Anesthesiology) Physician Taxonomy 207LC0200X · Licence 53399 (CO)
Pain Medicine (Anesthesiology) Physician Taxonomy 207LP2900X · Licence 23103 (NE)

Record details

NPI number1437245057
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 4, 2006
Last updated in NPPESDecember 27, 2019
Certification dateDecember 27, 2019

Medicare enrollment

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

Medicare specialtyANESTHESIOLOGY
Medical schoolSANFORD SCHOOL OF MEDICINE OF UNIVERSITY OF SOUTH DAKOTA
Graduated 2001 (25 years in practice)
Group practice Chi Health Clinic Physician Enterprise-Anesthesia Llc — 221 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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