Dr. John Granquist, MD
Hartford, CT 06106
Transthoracic Echocardiography (CPT 93306), Coronary Artery Disease, Resistant Hypertension, and Atrial Fibrillation rhythm management.
Transthoracic echocardiography (CPT 93306), 12-lead ECG & Holter/patch rhythm monitoring (CPT 93000 / 93248), stress testing (CPT 93015), and resistant hypertension / ApoB management. Filter by your insurance carrier, state, or procedure below.
Hartford, CT 06106
Transthoracic Echocardiography (CPT 93306), Coronary Artery Disease, Resistant Hypertension, and Atrial Fibrillation rhythm management.
New York, NY 10016
Top Billed Procedure: Established Cardiology Consultation & Hemodynamic Review [CPT 99214] • Transthoracic echocardiography (CPT 93306) & subspecialty diagnostics (5,654 CMS services/yr).
Jackson, MS 39216
Top Billed Procedure: Established Cardiology Consultation & Hemodynamic Review [CPT 99214] • Transthoracic echocardiography (CPT 93306) & subspecialty diagnostics (19,490 CMS services/yr).
Issaquah, WA 98029
Top Billed Procedure: Established Cardiology Consultation & Hemodynamic Review [CPT 99214] • Transthoracic echocardiography (CPT 93306) & subspecialty diagnostics (3,016 CMS services/yr).
Stamford, CT 06902
Top Billed Procedure: Established Cardiology Consultation & Hemodynamic Review [CPT 99214] • Transthoracic echocardiography (CPT 93306) & subspecialty diagnostics (20,441 CMS services/yr).
Lilburn, GA 30047
Top Billed Procedure: Established Cardiology Consultation & Hemodynamic Review [CPT 99214] • Transthoracic echocardiography (CPT 93306) & subspecialty diagnostics (4,878 CMS services/yr).
Greenville, PA 16125
Top Billed Procedure: Established Cardiology Consultation & Hemodynamic Review [CPT 99214] • Transthoracic echocardiography (CPT 93306) & subspecialty diagnostics (882 CMS services/yr).
Bethlehem, PA 18018
Top Billed Procedure: Established Cardiology Consultation & Hemodynamic Review [CPT 99214] • Transthoracic echocardiography (CPT 93306) & subspecialty diagnostics (5,406 CMS services/yr).
Ruskin, FL 33573
Top Billed Procedure: Established Cardiology Consultation & Hemodynamic Review [CPT 99214] • Transthoracic echocardiography (CPT 93306) & subspecialty diagnostics (10,424 CMS services/yr).
Tampa, FL 33629
Top Billed Procedure: Established Cardiology Consultation & Hemodynamic Review [CPT 99214] • Transthoracic echocardiography (CPT 93306) & subspecialty diagnostics (10,756 CMS services/yr).
Pembroke Pines, FL 33028
Top Billed Procedure: Established Cardiology Consultation & Hemodynamic Review [CPT 99214] • Transthoracic echocardiography (CPT 93306) & subspecialty diagnostics (4,866 CMS services/yr).
Huntingdon, PA 16652
Top Billed Procedure: Established Cardiology Consultation & Hemodynamic Review [CPT 99214] • Transthoracic echocardiography (CPT 93306) & subspecialty diagnostics (2,149 CMS services/yr).
Mcallen, TX 78503
Top Billed Procedure: Established Cardiology Consultation & Hemodynamic Review [CPT 99214] • Transthoracic echocardiography (CPT 93306) & subspecialty diagnostics (2,207 CMS services/yr).
Mc Connellsburg, PA 17233
Top Billed Procedure: Established Cardiology Consultation & Hemodynamic Review [CPT 99214] • Transthoracic echocardiography (CPT 93306) & subspecialty diagnostics (1,954 CMS services/yr).
Bradenton, FL 34209
Top Billed Procedure: Established Cardiology Consultation & Hemodynamic Review [CPT 99214] • Transthoracic echocardiography (CPT 93306) & subspecialty diagnostics (10,498 CMS services/yr).
Los Altos, CA 94024
Top Billed Procedure: Established Cardiology Consultation & Hemodynamic Review [CPT 99214] • Transthoracic echocardiography (CPT 93306) & subspecialty diagnostics (1,136 CMS services/yr).
Southbury, CT 06488
Top Billed Procedure: Established Cardiology Consultation & Hemodynamic Review [CPT 99214] • Transthoracic echocardiography (CPT 93306) & subspecialty diagnostics (1,768 CMS services/yr).
Ridgefield, NJ 07657
Top Billed Procedure: Established Cardiology Consultation & Hemodynamic Review [CPT 99214] • Transthoracic echocardiography (CPT 93306) & subspecialty diagnostics (2,521 CMS services/yr).
New York, NY 10016
Top Billed Procedure: Established Cardiology Consultation & Hemodynamic Review [CPT 99214] • Transthoracic echocardiography (CPT 93306) & subspecialty diagnostics (1,506 CMS services/yr).
Alexander City, AL 35010
Top Billed Procedure: Established Cardiology Consultation & Hemodynamic Review [CPT 99214] • Transthoracic echocardiography (CPT 93306) & subspecialty diagnostics (6,600 CMS services/yr).
Crystal Lake, IL 60014
Top Billed Procedure: Established Cardiology Consultation & Hemodynamic Review [CPT 99214] • Transthoracic echocardiography (CPT 93306) & subspecialty diagnostics (2,506 CMS services/yr).
Valley, AL 36854
Top Billed Procedure: Established Cardiology Consultation & Hemodynamic Review [CPT 99214] • Transthoracic echocardiography (CPT 93306) & subspecialty diagnostics (2,094 CMS services/yr).
Asheboro, NC 27203
Top Billed Procedure: Established Cardiology Consultation & Hemodynamic Review [CPT 99214] • Transthoracic echocardiography (CPT 93306) & subspecialty diagnostics (1,068 CMS services/yr).
Shippensburg, PA 17257
Top Billed Procedure: Established Cardiology Consultation & Hemodynamic Review [CPT 99214] • Transthoracic echocardiography (CPT 93306) & subspecialty diagnostics (2,918 CMS services/yr).
Perry, GA 31069
Top Billed Procedure: Established Cardiology Consultation & Hemodynamic Review [CPT 99214] • Transthoracic echocardiography (CPT 93306) & subspecialty diagnostics (457 CMS services/yr).
Camden, NJ 08103
Top Billed Procedure: Established Cardiology Consultation & Hemodynamic Review [CPT 99214] • Transthoracic echocardiography (CPT 93306) & subspecialty diagnostics (19,503 CMS services/yr).
Omaha, NE 68131
Top Billed Procedure: Established Cardiology Consultation & Hemodynamic Review [CPT 99214] • Transthoracic echocardiography (CPT 93306) & subspecialty diagnostics (11,862 CMS services/yr).
Des Moines, IA 50309
Top Billed Procedure: Established Cardiology Consultation & Hemodynamic Review [CPT 99214] • Transthoracic echocardiography (CPT 93306) & subspecialty diagnostics (6,602 CMS services/yr).
Oneonta, NY 13820
Top Billed Procedure: Established Cardiology Consultation & Hemodynamic Review [CPT 99214] • Transthoracic echocardiography (CPT 93306) & subspecialty diagnostics (3,096 CMS services/yr).
Mt. Pleasant, SC 29466
Top Billed Procedure: Established Cardiology Consultation & Hemodynamic Review [CPT 99214] • Transthoracic echocardiography (CPT 93306) & subspecialty diagnostics (2,783 CMS services/yr).
Rochester Hills, MI 48307
Top Billed Procedure: Established Cardiology Consultation & Hemodynamic Review [CPT 99214] • Transthoracic echocardiography (CPT 93306) & subspecialty diagnostics (9,534 CMS services/yr).
Santa Fe, NM 87505
Top Billed Procedure: Established Cardiology Consultation & Hemodynamic Review [CPT 99214] • Transthoracic echocardiography (CPT 93306) & subspecialty diagnostics (3,139 CMS services/yr).
Staten Island, NY 10305
Top Billed Procedure: Established Cardiology Consultation & Hemodynamic Review [CPT 99214] • Transthoracic echocardiography (CPT 93306) & subspecialty diagnostics (15,560 CMS services/yr).
Chicago, IL 60631
Top Billed Procedure: Established Cardiology Consultation & Hemodynamic Review [CPT 99214] • Transthoracic echocardiography (CPT 93306) & subspecialty diagnostics (8,702 CMS services/yr).
Fort Worth, TX 76244
Top Billed Procedure: Established Cardiology Consultation & Hemodynamic Review [CPT 99214] • Transthoracic echocardiography (CPT 93306) & subspecialty diagnostics (10,601 CMS services/yr).
East Alton, IL 62024
Top Billed Procedure: Established Cardiology Consultation & Hemodynamic Review [CPT 99214] • Transthoracic echocardiography (CPT 93306) & subspecialty diagnostics (1,892 CMS services/yr).
Port St John, FL 32927
Top Billed Procedure: Established Cardiology Consultation & Hemodynamic Review [CPT 99214] • Transthoracic echocardiography (CPT 93306) & subspecialty diagnostics (8,233 CMS services/yr).
Clinicians interrupt patients after a median of 11 seconds (J Gen Intern Med, PMID 29972200). Select your appointment reason below to generate your 1-page script:
"I have two specific goals for our 15 minutes today: first, my morning TSH is [X] mIU/L with persistent fatigue and cold intolerance, so I would like to evaluate Free T4, Free T3, TPO Antibodies, and Ferritin together; second, if we palpate any thyroid asymmetry, can we perform an in-office neck ultrasound (CPT 76536)?"
Confirms the endocrinologist images thyroid nodules themselves rather than sending you to a hospital radiology department.
Identifies structural thyroid specialists vs. general diabetes-only clinics.
Hold all Biotin (Vitamin B7) supplements for 72 hours before your blood draw so streptavidin assay interference does not create a false TSH/Free T4 reading.
"My recent HbA1c came back at [X]%. Today I want to check my Fasting Insulin to calculate HOMA-IR, discuss starting Extended-Release Metformin ER ($5.40/mo cash) or a 14-day Continuous Glucose Monitor trial (CPT 95251), and establish a 90-day re-test target below 5.4%."
Verifies the clinic actively prescribes and interprets Dexcom/Libre CGM sensor data.
Standard outpatient evaluation code; ask for transparent self-pay rates ($120–$180) if uninsured.
Bring a 3-day log of post-dinner fingerstick or CGM readings and confirm whether your pharmacy filled Metformin ER (Extended-Release) rather than immediate-release.
"My 7-day rested home blood pressure averages [X/Y] mmHg and my LDL-C is [Z] mg/dL. Today I would like to review my home cuff log against office white-coat readings, order direct Apolipoprotein B (ApoB) and one-time genetic Lipoprotein(a), and decide if a CAC score or low-dose statin/ARB is warranted."
Assesses left ventricular wall thickness and valve function directly in the cardiology suite.
Baseline rhythm and conduction screen prior to antihypertensive titration.
Bring your physical home upper-arm BP cuff to the clinic to validate calibration, along with a 7-day written morning/evening seated average.
"Even though my hemoglobin is normal, my Serum Ferritin is [X] ng/mL and I am experiencing persistent fatigue and hair shedding. Can we check a fasting Iron Panel with Transferrin Saturation (TSAT), rule out celiac/GI malabsorption, and target a Ferritin above 50–75 ng/mL?"
Confirms the hematology clinic can administer IV iron when oral iron fails or causes GI distress.
Tracks mean corpuscular volume (MCV) and early reticulocyte hemoglobin response.
Stop oral iron supplements for 24 hours before drawing a fasting morning Serum Iron and TSAT panel so circulating pill iron does not skew saturation.
"I have had [reflux / bloating / unexplained low ferritin] for [X] months. Today I want to distinguish upper GI mucosal issues from functional motility, review a step-down plan so I am not stuck on a PPI indefinitely, and verify whether you perform diagnostic EGD (CPT 43239) or colonoscopy (CPT 45385) at an ambulatory center."
High annual CPT 45385 volume (>300/yr) correlates with higher adenoma detection rates and safer polypectomy.
Rules out Barrett esophagus, H. pylori gastritis, and duodenal celiac villous atrophy.
Always request an Ambulatory Surgery Center (ASC) facility quote rather than a hospital outpatient department (HOPD) for endoscopy/colonoscopy to save $1,200–$2,400 in facility fees.
General directory listings show what a doctor claims to treat, whereas federal CMS Medicare Part B claims reveal what they actually perform every week. For example, seeing an endocrinologist who performs 400+ in-office thyroid neck ultrasounds (CPT 76536) per year or a gastroenterologist in the top decile for adenoma detection colonoscopy (CPT 45385) prevents unnecessary outside imaging referrals and repeat appointments.
Large hospital networks often bill tens of thousands of automated lab draws or vaccination claims under a single department chair NPI. Our directory triage engine isolates individual practicing clinicians (300 to 4,500 Medicare beneficiaries/year) and requires a minimum 4.2-star verified Google patient consensus with at least 15 reviews for default showcase rankings.
The GreatDoc™ rating—calculated by the Proprietary DotMD™ J3 Model—audits patient reviews across clinical diagnostic accuracy, unhurried listening, and procedure skill while flagging administrative friction points (such as $250 annual clinic fees, parking validation costs, or phone hold times) so you know exactly what to expect before walking into the waiting room.
Every flagship physician profile on dotMD includes an interactive Insurance Network & Cash-Rate Checker covering Original Medicare Part B, Medicare Advantage, BlueCross BlueShield, Aetna, Cigna, UnitedHealthcare, and regional PPO/HMO plans—plus the exact CMS geo-adjusted CPT 99204 self-pay cash rate ($195–$260) and 3-question script to verify network participation with the billing desk.