Doctor profile · Federal record
Dr. Cynthia Johnston, M.D.
Emergency Medicine Physician · Marathon, FL
- NPI 1831162239
- 20 yrs on file
- Female
- Solo practice
- No sanctions
Practice & contact
- Primary practice
-
3301 Overseas Hwy
Marathon, FL 330502329
(305) 743-5533
fax (305) 289-0630 - Mailing address
-
Po Box 500369
Marathon, FL 330500369
Credentials & registration
- NPI registered
- February 2006 — 20 yrs on file
- Profile last updated
- September 5, 2007
- Specialty taxonomy
- 207P00000X — NUCC code
- State license (1)
- Florida #ME94206
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1831162239. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
105
Distinct HCPCS
6
Medicare allowed
$10,736
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 34 | 34 | $125 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 20 | 20 | $166 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 16 | 15 | $89 | |
81003 |
Automated urinalysis test | 12 | 12 | $2 | |
87811 |
Detection test by immunoassay with direct visual observation for severe acute respiratory syndrome coronavirus 2 (covid-19) | 12 | 12 | $41 | |
99203 |
New patient office or other outpatient visit, 30-44 minutes | 11 | 11 | $111 |
In context: peer comparison
Among 2 peers in this city , average services per provider: 53. This provider delivers 2.0× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
95
Patients
95
Total drug cost
$949
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Doxycycline Hyclate | Generic | 35 | 35 | $513 |
| Prednisone | Generic | 27 | 27 | $52 |
| Methylprednisolone | Generic | 20 | 20 | $197 |
| Nitrofurantoin Mono-Macro (Nitrofurantoin Monohyd/M-Cryst) | Brand | 13 | 13 | $187 |
Frequently asked questions
What is Dr. Cynthia Johnston's medical specialty?
Dr. Cynthia Johnston practices Emergency Medicine Physician in Marathon, FL.
Where does Dr. Cynthia Johnston practice?
Dr. Cynthia Johnston practices at 3301 Overseas Hwy, Marathon, FL 330502329. Office phone: 3057435533.
What is Dr. Cynthia Johnston's NPI?
Dr. Cynthia Johnston's National Provider Identifier (NPI) is 1831162239, issued by NPPES.
What procedures does Dr. Cynthia Johnston commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); New patient office or other outpatient visit (HCPCS 99204); Established patient office or other outpatient visit (HCPCS 99213). Source: CMS Medicare Physician & Other Practitioners file.