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

Daniel O Siegel, MD

Individual provider Internal Medicine Physician · NPI 1174518344

Daniel O Siegel, MD is an Internal Medicine in Denver, Colorado. Graduated from Icahn School of Medicine at Mount Sinai in 1996, 30 years ago. Practices with Denver Digestive Health Specialists Inc, a 15-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Colorado.

Years since qualifying
30
Trained at
Icahn School of Medicine at Mount Sinai
Licensed in
CO
In the registry since
2005
Specialties on file
2
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

4500 E 9th Ave #720 S
Denver, CO 80220
Phone: (303) 355-3525
Fax: (303) 355-0255
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence 35377 (CO)
Internal Medicine Physician Taxonomy 207R00000X · Licence 35377 (CO)

Record details

NPI number1174518344
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedSeptember 14, 2005
Last updated in NPPESSeptember 11, 2025
Mailing address4500 E 9th Ave, 720 S, Denver, CO 80220

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Also practisesGASTROENTEROLOGY
Medical schoolICAHN SCHOOL OF MEDICINE AT MOUNT SINAI
Graduated 1996 (30 years in practice)
Group practice Denver Digestive Health Specialists Inc — 15 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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