Doctor profile · Federal record
Dr. Nathan Markwart, D.O.
Critical Care Medicine (Internal Medicine) Physician (CMS: Critical Care (Intensivists)) · Boca Raton, FL
- NPI 1265774574
- Accepts Medicare
- 18 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
1601 Clint Moore RD, Suite 100
Boca Raton, FL 334872768
(561) 939-0200 - Mailing address
-
9420 Poinciana Pl, Apt 403
Davie, FL 333244848
Credentials & registration
- NPI registered
- March 2013 — 13 yrs on file
- Profile last updated
- September 3, 2015
- Year of graduation
- 2008 — 18 yrs since
- Specialty taxonomy
- 207RC0200X — NUCC code
- State license (1)
- Florida #OS 13310
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1265774574. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
773
Distinct HCPCS
5
Medicare allowed
$149,430
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99291 |
Critical care, first 30-74 minutes | 568 | 292 | $222 | |
99233 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 153 | 121 | $122 | |
36620 |
Insertion of artery tube for blood sampling or infusion through skin | 20 | 20 | $46 | |
31500 |
Emergent insertion of breathing tube into windpipe using an endoscope | 16 | 15 | $151 | |
36556 |
Insertion of non-tunneled central venous tube for infusion (5 years or older) | 16 | 16 | $89 |
In context: peer comparison
Among 3 peers in this city , average services per provider: 127. This provider delivers 6.1× the peer median.Frequently asked questions
What is Dr. Nathan Markwart's medical specialty?
Dr. Nathan Markwart practices Critical Care Medicine (Internal Medicine) Physician in Boca Raton, FL.
Where does Dr. Nathan Markwart practice?
Dr. Nathan Markwart practices at 1601 Clint Moore RD, Boca Raton, FL 334872768. Office phone: 5619390200.
What is Dr. Nathan Markwart's NPI?
Dr. Nathan Markwart's National Provider Identifier (NPI) is 1265774574, issued by NPPES.
Does Dr. Nathan Markwart accept Medicare assignment?
Yes. Dr. Nathan Markwart accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Nathan Markwart commonly perform?
Top Medicare-reported procedures in 2023: Critical care (HCPCS 99291); Subsequent hospital care with moderate levelof medical decision making (HCPCS 99233); Insertion of artery tube for blood sampling or infusion through skin (HCPCS 36620). Source: CMS Medicare Physician & Other Practitioners file.