Nathan Michael Markwart, D.O.
Critical Care Medicine (Internal Medicine) Physician · Boca Raton, FL
Nathan Michael Markwart, D.O. is a critical care medicine (internal medicine) physician with a practice address in Boca Raton, Florida, and NPI 1265774574, issued on Mar 25, 2013. Check the license (Florida OS 13310, as entered in NPPES) on the Florida health license search; the Medicare figures below come from public CMS files.
- Name
- Nathan Michael Markwart
- Credential
- D.O.
- Primary taxonomy
- Critical Care Medicine (Internal Medicine) Physician 207RC0200X
- License number
- OS 13310 FL
Self-reported in NPPES; status is on the state search - Practice location
- 1601 Clint Moore RD, Boca Raton, FL 33487
- Phone
- (561) 939-0200
- Enumerated
- Mar 25, 2013
- Record last updated
- Sep 3, 2015 (not updated in 11 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20150720002808); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest critical care medicine (internal medicine) physician records → All 567 in Florida → Look up another NPI →
Also registered at 1601 Clint Moore RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Erin Anderson, AU.D.Audiologist1073766713
- Julia Andrews, AUDAudiologist1255584892
- Michael Aronsohn, MDSpecialist1457315236
- Jonathan Auerbach, M.D.Critical Care Medicine (Internal Medicine) Physician1487811899
Verify Nathan Michael Markwart in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersFlorida health license search
Search for license OS 13310Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Critical Care Associates OF South Florida LLCBoynton Beach, FL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Nathan Michael Markwart among 567 critical care medicine (internal medicine) physician records in Florida
Nathan Michael Markwart, D.O. is one of 567 critical care medicine (internal medicine) physician records with a practice address in Florida. 89% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2013, is newer than 57% of them.
- NPI issued2013 · 57% of these records are older, 39% newer
- In a Medicare fileYes · 89% of these records are
- In the CMS Doctors and Clinicians fileYes · 84% of these records are
- Graduated2008 · median 2009 among the 475 with a school on file
- Record last updated2015 · 35% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RC0200X and a Florida practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Critical Care Medicine (Internal Medicine) Physician providers in Florida
There are 567 critical care medicine (internal medicine) physician records in Florida.
All 567 in Florida → Every provider in Boca Raton → Critical Care Medicine (Internal Medicine) Physician nationwide →
The 8 critical care medicine (internal medicine) physician records with the nearest ZIP codes
- Jonathan Auerbach, M.D.Boca Raton, FL 334871487811899
- Yehuda FuzailovBoca Raton, FL 334871336536382
- Amanda Zeidman, M.D.Boca Raton, FL 334861942628037
- Jeremy Berg, D.O.Delray Beach, FL 334841104095157
- Michele DavisDelray Beach, FL 334841053832691
- Elizabeth Carpenter, MDBrandon, FL 335111013141514
- Nelson Gomez, M.D.Brandon, FL 335111013949544
- Sunil Musinipally, M.DBrandon, FL 335111497965065
Common questions
What is Nathan Michael Markwart, D.O.'s NPI number?
Nathan Michael Markwart, D.O.'s National Provider Identifier (NPI) is 1265774574, issued on Mar 25, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Nathan Michael Markwart, D.O. located?
The NPPES record lists a practice address at 1601 Clint Moore RD, Boca Raton, FL, 33487. Phone: (561) 939-0200. Providers update this record themselves, so call before visiting.
How can I verify Nathan Michael Markwart, D.O.'s license?
NPPES lists Florida license number OS 13310, as entered by the provider. Search the Florida health license search at https://mqa-internet.doh.state.fl.us/mqasearchservices/healthcareproviders. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.