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

Dr. Nathan Daniel Mark, DO

Individual provider Anesthesiology Physician · NPI 1902973993

Dr. Nathan Daniel Mark, DO is an Anesthesiology in Hartford, Connecticut. Graduated from New York College of Osteo Medicine of New York Institute of Technology in 2005, 21 years ago. Practices with Catholic Health Initiatives Colorado, a 1,266-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Colorado and Connecticut.

Years since qualifying
21
Trained at
New York College of Osteo Medicine of New York Institute of Technology
Licensed in
CO, CT
In the registry since
2006
Specialties on file
2
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

See every abbreviation used in this directory →

Practice location Address checks out

80 Seymour St
Hartford, CT 06106-3315
Phone: (860) 545-2117
Show map & directions

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

Additional practice locations (1)

  • 1010 Three Springs Blvd, Durango, CO 81301-8296 — (970) 761-3200

Specialties & licences

Anesthesiology Physician (primary) Taxonomy 207L00000X · Licence 050791 (CT)
Anesthesiology Physician Taxonomy 207L00000X · Licence CDRH.0057872 (CO)

Record details

NPI number1902973993
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedNovember 29, 2006
Last updated in NPPESOctober 3, 2024
Certification dateOctober 3, 2024

Medicare enrollment

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

Medicare specialtyANESTHESIOLOGY
Medical schoolNEW YORK COLLEGE OF OSTEO MEDICINE OF NEW YORK INSTITUTE OF TECHNOLOGY
Graduated 2005 (21 years in practice)
Group practice Catholic Health Initiatives Colorado — 1266 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Other providers in Hartford