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

Dr. Nathan Michael Markwart, DO

Individual provider Critical Care Medicine (Internal Medicine) Physician · NPI 1265774574

Dr. Nathan Michael Markwart, DO is a Critical Care (Intensivists) in Boca Raton, Florida. Qualified in 2008, 18 years ago. Practices with Critical Care Associates of South Florida LLC, a 20-clinician group and accepts Medicare assignment. Licensed in Florida.

Years since qualifying
18
Licensed in
FL
In the registry since
2013
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.

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Practice location Address checks out

1601 Clint Moore Rd Ste 100
Boca Raton, FL 33487-2768
Phone: (561) 939-0200
Show map & directions

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

Specialties & licences

Critical Care Medicine (Internal Medicine) Physician (primary) Taxonomy 207RC0200X · Licence OS 13310 (FL)

Record details

NPI number1265774574
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedMarch 25, 2013
Last updated in NPPESSeptember 3, 2015
Mailing address9420 Poinciana Pl, Apt 403, Davie, FL 33324-4848

Medicare enrollment

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

Medicare specialtyCRITICAL CARE (INTENSIVISTS)
Medical schoolOTHER
Graduated 2008 (18 years in practice)
Group practice Critical Care Associates Of South Florida Llc — 20 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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