Dr. Gretchen Johns, MD
What this data tells you about Dr. Johns
Dr. Gretchen Johns is a clinical pathology/laboratory medicine physician in Jacksonville, FL, with 19 years of NPI registration. Based on federal Medicare data, Dr. Johns performed 72,425 Medicare services across 31,566 unique beneficiaries.
Between the years covered by Open Payments, Dr. Johns received a total of $73 from 2 pharmaceutical and/or device companies across 4 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in clinical pathology/laboratory medicine physician. The majority of payments are for speaking programs and promotional activities, reflecting participation in industry-sponsored events. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Johns is Very High — reflecting how much public federal data is available about this provider. This is not a quality rating. Patients are encouraged to use this data as one of several factors when choosing a healthcare provider.
Florida License Status
FL DOH · MQA| Profession | License # | Status | Expires | Board Action |
|---|---|---|---|---|
| Medical Doctor | 102727 | Clear | January 31, 2027 | — |
Medicare Practice Summary
Medicare Utilization ↗Top procedures by volume
Ranked by number of services performed for Medicare patients. Avg. submitted charge is what the provider billed; avg. Medicare payment is what CMS paid.
| Procedure | Volume | Avg. paid | Avg. submitted |
|---|---|---|---|
| Blood draw (venipuncture) Insertion of a needle into a vein to collect a blood sample. |
57,095 | $8 | $39 |
| Prothrombin time test (blood clotting) A laboratory test that measures how long it takes for blood to clot. This procedure evaluates the body's coagulation process. |
9,300 | $4 | $76 |
| Blood creatinine level test A blood test that measures the amount of creatinine, a waste product from muscle wear and tear, to help assess kidney function. |
2,991 | $5 | $49 |
| Urine volume measurement | 1,155 | $4 | $33 |
| Coagulation assessment blood test A blood test that measures how long it takes for blood to clot. The sample can be plasma or whole blood. |
848 | $6 | $103 |
| Automated urinalysis An automated laboratory test performed on a urine sample to analyze its chemical and physical properties. The procedure uses machinery to detect various substances and cells within the urine. |
248 | $2 | $27 |
| Coagulation function measurement, d-dimer; quantitative | 135 | $10 | $224 |
| Blood glucose level test A test that measures the amount of sugar in your blood. |
121 | $4 | $39 |
| Comprehensive metabolic blood panel A blood test that measures a group of chemicals, including glucose, electrolytes, and kidney and liver function markers. |
110 | $10 | $525 |
| Fibrinogen activity test A blood test that measures the activity level of fibrinogen, a protein essential for blood clotting. |
69 | $10 | $101 |
| Diluted clotting factor X assessment test A laboratory test that measures the level or activity of factor X in the blood using a diluted sample method. |
67 | $9 | $165 |
| Coagulation function screening test A blood test that evaluates how well your blood clots. The results are interpreted and reported by a medical professional. |
63 | $27 | $159 |
| Phospholipid test A laboratory test that measures the level of phospholipids in the blood. Phospholipids are a type of fat found in the blood and cell membranes. |
37 | $17 | $197 |
| Clotting factor VIII measurement A blood test that measures the level of factor VIII, a protein essential for blood clotting. |
27 | $18 | $290 |
| Clotting factor VIII antigen test A blood test that measures the amount of factor VIII protein present in the blood. This test helps evaluate blood clotting function. |
22 | $22 | $302 |
| Blood coagulation and fibrinolysis function test A laboratory test that measures how well your blood clots and how effectively your body dissolves clots. |
21 | $30 | $300 |
| Genetic test interpretation and report A healthcare provider reviews the results of genetic testing and provides a written report explaining the findings. |
17 | $26 | $197 |
| Thrombin time and fibrinogen screening test A blood test that measures the time it takes for plasma to clot and screens for fibrinogen levels. |
16 | $6 | $94 |
| Factor X clotting test A blood test that measures the level of Factor X, a protein essential for normal blood clotting. |
15 | $18 | $365 |
| Clotting factor XI (PTA) measurement A blood test that measures the level of clotting factor XI, also known as plasma thromboplastin antecedent (PTA), to evaluate blood coagulation. |
15 | $18 | $320 |
| Prothrombin (Factor II) test A blood test that measures the level of prothrombin, also known as clotting factor II, to evaluate how well your blood clots. |
14 | $13 | $311 |
| Clotting factor VII injection Administration of a blood clotting protein to help the body form clots and control bleeding. |
14 | $18 | $330 |
| Factor V clotting test A blood test that measures the level of Factor V, a protein essential for normal blood clotting. |
13 | $17 | $360 |
| Basic metabolic blood panel A blood test that measures a group of basic chemicals, including total calcium levels. |
12 | $8 | $345 |
Industry Payment Transparency
Open Payments through 2023 ↗Payment profile
Industry payments classified by relationship type. Not all payments are equal — research and consulting reflect different relationships than speaking programs or meals.
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
Payments by company (2023)
Associated products mentioned in payments ›
The majority of payments (55%) are for speaking programs and promotional activities, which reflect participation in industry-sponsored educational or marketing events. This is common in clinical pathology/laboratory medicine physician and does not inherently indicate bias, but patients may wish to be aware.
Geographic Context
0.0 mi
Data Sources
| Provider Registry | ✓ NPPES | Weekly updates |
| Medicare Enrollment | ✓ PECOS | Monthly updates |
| Practice Data | ✓ Medicare Util. | Annual (CY lag) |
| Industry Payments | ✓ Open Payments | CY 2023 |
| Disciplinary History | — Not public | N/A |
This provider has data in 4 of 4 available federal datasets, with a Data Coverage level of Very High. This measures how much public data is available about a provider — not how good they are. How we calculate this →
Summary
Dr. Johns is a mixed practice specialist, with above-average Medicare volume (top 6% in FL), with speaking/promotional industry engagement, with 19 years of NPI registration.
This summary is auto-generated from federal data. It describes data availability and patterns — not clinical quality. Read our methodology →
Frequently Asked Questions
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All data on this page is sourced verbatim from public federal records published by the U.S. Centers for Medicare & Medicaid Services (CMS): NPPES ↗, Open Payments ↗, Medicare Provider Utilization ↗, and PECOS. Publication is mandated by the Physician Payments Sunshine Act (§6002 ACA, 42 U.S.C. §1320a-7h) and the Freedom of Information Act.
This page is not medical advice, an endorsement, a recommendation, or a quality rating. The Transparency Score measures data completeness — how much federal information exists for this provider — not clinical performance, patient outcomes, or quality of care. Always verify information directly with the provider and consult a licensed clinician before making medical decisions.
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