CYNTHIA L JOHNSTON (M.D.) – Emergency Medicine Physician, NPI 1831162239
Emergency Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
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Provider Addresses for CYNTHIA L JOHNSTON (M.D.)
PO BOX 500369
MARATHON, FL 330500369
Phone: (305) 304-0448
Type: Mailing
3301, Overseas Highway, Marathon, Monroe County, Florida, 33050, United States
MARATHON, FL 330502329
Phone: (305) 743-5533
Fax: (305) 289-0630
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 4 Open Payments records for all available years, with a total value of $84.
Total Amount is formed as General ($84) + Research ($0) + Ownership ($0) = $84.
Last reported payment date: 2023-12-27 • Largest payer in this snapshot: Janssen Biotech, Inc. ($63).
Total Amount
$84
General + Research + Ownership
Payments
4
Total payment records
General Amount
$84
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2023-12-27
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Janssen Biotech, Inc. | $63 |
| Lilly USA, LLC | $21 |
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2005-11-23
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20051123000425 | I | Family Practice | FL | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 34 | 34 | $0 |
| 99204 | New patient office or other outpatient visit, 45-59 minutes | 20 | 20 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 16 | 15 | $0 |
| 81003 | Automated urinalysis test | 12 | 12 | $0 |
| 87811 | Detection test by immunoassay with direct visual observation for severe acute respiratory syndrome coronavirus 2 (covid-19) | 12 | 12 | $0 |
Insurance plans in this area (ZIP 33050)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Emergency Medicine | TN | |
| Family Practice, Sports Medicine | FL | |
| Pediatric Medicine, Family Practice | NY | |
| Physician Assistant | NJ | |
| Emergency Medicine, Family Practice | FL | |
| Nurse Practitioner | FL | |
| Nurse Practitioner | FL | |
| Nurse Practitioner | MI | |
| Family Practice | FL | |
| - | FL |
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