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Nephrology Doctors Who Perform the Procedure You Need—and Take Your Insurance.

CKD staging via eGFR + Cystatin C and urine albumin-to-creatinine ratio (uACR), SGLT2i/finerenone nephron preservation, resistant hypertension, and kidney stone metabolic workups. Filter by your insurance carrier, state, or procedure below.

4. Complete Physician Directory

All Nephrology Physicians (2,364)

Page 31 of 66
Nephrology ★ 4.6

Dr. Alexander Usorov, MD

Brooklyn, NY 11217

★★★★★ 4.8 (21)
38th NY Pct

Top Billed Procedure: Chronic Kidney Disease eGFR, uACR & Electrolyte Management [CPT 99214] • CKD staging via eGFR + Cystatin C and urine albumin-to-creatinine ratio (uACR) & subspecialty diagnostics (1,154 CMS services/yr).

✓ Accepts Kaiser Permanente ~$232 Cash
Nephrology ★ 4.7
★★★★★ 4.8 (21)
70th AZ Pct

Top Billed Procedure: Chronic Kidney Disease eGFR, uACR & Electrolyte Management [CPT 99214] • CKD staging via eGFR + Cystatin C and urine albumin-to-creatinine ratio (uACR) & subspecialty diagnostics (3,305 CMS services/yr).

✓ Accepts Kaiser Permanente ~$207 Cash
Nephrology ★ 4.4

Dr. Manmeet Brar, MD

Dover, DE 19904

★★★★★ 4.8 (17)
8th DE Pct

Top Billed Procedure: Chronic Kidney Disease eGFR, uACR & Electrolyte Management [CPT 99214] • CKD staging via eGFR + Cystatin C and urine albumin-to-creatinine ratio (uACR) & subspecialty diagnostics (1,175 CMS services/yr).

✓ Accepts Kaiser Permanente ~$209 Cash
Nephrology ★ 4.6

Dr. Arooj Fatima, MD

Rockford, IL 61107

★★★★★ 4.8 (21)
42nd IL Pct

Top Billed Procedure: Chronic Kidney Disease eGFR, uACR & Electrolyte Management [CPT 99214] • CKD staging via eGFR + Cystatin C and urine albumin-to-creatinine ratio (uACR) & subspecialty diagnostics (1,876 CMS services/yr).

✓ Accepts Kaiser Permanente ~$218 Cash
Nephrology ★ 4.8

Dr. Shyamal Sarkar, MD

Jackson, TN 38305

★★★★★ 4.8 (17)
89th TN Pct

Top Billed Procedure: Chronic Kidney Disease eGFR, uACR & Electrolyte Management [CPT 99214] • CKD staging via eGFR + Cystatin C and urine albumin-to-creatinine ratio (uACR) & subspecialty diagnostics (10,718 CMS services/yr).

✓ Accepts Kaiser Permanente ~$201 Cash
Nephrology ★ 4.5

Dr. Steven Sawelson, MD

Torrance, CA 90503

★★★★★ 4.8 (17)
14th CA Pct

Top Billed Procedure: Chronic Kidney Disease eGFR, uACR & Electrolyte Management [CPT 99214] • CKD staging via eGFR + Cystatin C and urine albumin-to-creatinine ratio (uACR) & subspecialty diagnostics (1,015 CMS services/yr).

✓ Accepts Kaiser Permanente ~$239 Cash
Nephrology ★ 4.4

Dr. Marcial Torres, MD

Dallas, TX 75204

★★★★★ 4.8 (17)
1st TX Pct

Top Billed Procedure: Chronic Kidney Disease eGFR, uACR & Electrolyte Management [CPT 99214] • CKD staging via eGFR + Cystatin C and urine albumin-to-creatinine ratio (uACR) & subspecialty diagnostics (650 CMS services/yr).

✓ Accepts Kaiser Permanente ~$211 Cash
Nephrology ★ 4.6

Dr. Maitreyee Gupta, MD

Philadelphia, PA 19107

★★★★★ 4.8 (21)
31st PA Pct

Top Billed Procedure: Chronic Kidney Disease eGFR, uACR & Electrolyte Management [CPT 99214] • CKD staging via eGFR + Cystatin C and urine albumin-to-creatinine ratio (uACR) & subspecialty diagnostics (1,120 CMS services/yr).

✓ Accepts Kaiser Permanente ~$209 Cash
Nephrology ★ 4.8

Dr. Barton Brezina, MD

Augusta, GA 30901

★★★★★ 4.8 (24)
96th GA Pct

Top Billed Procedure: Chronic Kidney Disease eGFR, uACR & Electrolyte Management [CPT 99214] • CKD staging via eGFR + Cystatin C and urine albumin-to-creatinine ratio (uACR) & subspecialty diagnostics (12,428 CMS services/yr).

✓ Accepts Kaiser Permanente ~$209 Cash
Nephrology ★ 4.7

Dr. Hasan Khondker, MD

Riverhead, NY 11901

★★★★★ 4.8 (16)
79th NY Pct

Top Billed Procedure: Chronic Kidney Disease eGFR, uACR & Electrolyte Management [CPT 99214] • CKD staging via eGFR + Cystatin C and urine albumin-to-creatinine ratio (uACR) & subspecialty diagnostics (4,138 CMS services/yr).

✓ Accepts Kaiser Permanente ~$232 Cash
Nephrology ★ 4.8
★★★★★ 4.8 (16)
92nd AZ Pct

Top Billed Procedure: Chronic Kidney Disease eGFR, uACR & Electrolyte Management [CPT 99214] • CKD staging via eGFR + Cystatin C and urine albumin-to-creatinine ratio (uACR) & subspecialty diagnostics (7,980 CMS services/yr).

✓ Accepts Kaiser Permanente ~$207 Cash
Nephrology ★ 4.8

Dr. Reejis Stephen, MD

Brunswick, GA 31520

★★★★★ 4.8 (16)
90th GA Pct

Top Billed Procedure: Chronic Kidney Disease eGFR, uACR & Electrolyte Management [CPT 99214] • CKD staging via eGFR + Cystatin C and urine albumin-to-creatinine ratio (uACR) & subspecialty diagnostics (6,516 CMS services/yr).

✓ Accepts Kaiser Permanente ~$209 Cash
Nephrology ★ 4.8

Dr. Mark Romoff, MD

Van Nuys, CA 91405

★★★★★ 4.8 (16)
97th CA Pct

Top Billed Procedure: Chronic Kidney Disease eGFR, uACR & Electrolyte Management [CPT 99214] • CKD staging via eGFR + Cystatin C and urine albumin-to-creatinine ratio (uACR) & subspecialty diagnostics (20,494 CMS services/yr).

✓ Accepts Kaiser Permanente ~$239 Cash
Nephrology ★ 4.7
★★★★★ 4.8 (24)
82nd CA Pct

Top Billed Procedure: Chronic Kidney Disease eGFR, uACR & Electrolyte Management [CPT 99214] • CKD staging via eGFR + Cystatin C and urine albumin-to-creatinine ratio (uACR) & subspecialty diagnostics (4,555 CMS services/yr).

✓ Accepts Kaiser Permanente ~$239 Cash
Nephrology ★ 4.7

Dr. Syed Hasni, MD

Barbourville, KY 40906

★★★★★ 4.8 (16)
79th KY Pct

Top Billed Procedure: Chronic Kidney Disease eGFR, uACR & Electrolyte Management [CPT 99214] • CKD staging via eGFR + Cystatin C and urine albumin-to-creatinine ratio (uACR) & subspecialty diagnostics (3,201 CMS services/yr).

✓ Accepts Kaiser Permanente ~$209 Cash
Nephrology ★ 4.8

Dr. Hemender Vats, MD

Kansas City, MO 64132

★★★★★ 4.8 (16)
73rd MO Pct

Top Billed Procedure: Chronic Kidney Disease eGFR, uACR & Electrolyte Management [CPT 99214] • CKD staging via eGFR + Cystatin C and urine albumin-to-creatinine ratio (uACR) & subspecialty diagnostics (1,982 CMS services/yr).

✓ Accepts Kaiser Permanente ~$209 Cash
Nephrology ★ 4.6

Dr. Miroslaw Zdunek, MD

Wilmington, DE 19805

★★★★★ 4.8 (24)
49th DE Pct

Top Billed Procedure: Chronic Kidney Disease eGFR, uACR & Electrolyte Management [CPT 99214] • CKD staging via eGFR + Cystatin C and urine albumin-to-creatinine ratio (uACR) & subspecialty diagnostics (3,015 CMS services/yr).

✓ Accepts Kaiser Permanente ~$209 Cash
Nephrology ★ 4.6

Dr. Mahmoud Mahmoud, MD

Stuart, FL 34994

★★★★★ 4.8 (16)
45th FL Pct

Top Billed Procedure: Chronic Kidney Disease eGFR, uACR & Electrolyte Management [CPT 99214] • CKD staging via eGFR + Cystatin C and urine albumin-to-creatinine ratio (uACR) & subspecialty diagnostics (2,014 CMS services/yr).

✓ Accepts Kaiser Permanente ~$216 Cash
Nephrology ★ 4.6

Dr. Raymond Schreyer, MD

Northfield, NJ 08228

★★★★★ 4.8 (24)
54th NJ Pct

Top Billed Procedure: Chronic Kidney Disease eGFR, uACR & Electrolyte Management [CPT 99214] • CKD staging via eGFR + Cystatin C and urine albumin-to-creatinine ratio (uACR) & subspecialty diagnostics (2,278 CMS services/yr).

✓ Accepts Kaiser Permanente ~$209 Cash
Nephrology ★ 4.8

Dr. Christopher Provenzano, MD

Shelby Township, MI 48315

★★★★★ 4.8 (16)
92nd MI Pct

Top Billed Procedure: Chronic Kidney Disease eGFR, uACR & Electrolyte Management [CPT 99214] • CKD staging via eGFR + Cystatin C and urine albumin-to-creatinine ratio (uACR) & subspecialty diagnostics (6,128 CMS services/yr).

✓ Accepts Kaiser Permanente ~$209 Cash
Nephrology ★ 4.5

Dr. Emily Kenner, MD

Edgewood, KY 41017

★★★★★ 4.8 (16)
48th KY Pct

Top Billed Procedure: Chronic Kidney Disease eGFR, uACR & Electrolyte Management [CPT 99214] • CKD staging via eGFR + Cystatin C and urine albumin-to-creatinine ratio (uACR) & subspecialty diagnostics (2,098 CMS services/yr).

✓ Accepts Kaiser Permanente ~$209 Cash
Nephrology ★ 4.7

Dr. Elliot Suchin, MD

Hainesport, NJ 08036

★★★★★ 4.8 (16)
93rd NJ Pct

Top Billed Procedure: Chronic Kidney Disease eGFR, uACR & Electrolyte Management [CPT 99214] • CKD staging via eGFR + Cystatin C and urine albumin-to-creatinine ratio (uACR) & subspecialty diagnostics (7,020 CMS services/yr).

✓ Accepts Kaiser Permanente ~$209 Cash
Nephrology ★ 4.7

Dr. Fernando Lopez Osma, MD

Gainesville, FL 32605

★★★★★ 4.8 (16)
42nd FL Pct

Top Billed Procedure: Chronic Kidney Disease eGFR, uACR & Electrolyte Management [CPT 99214] • CKD staging via eGFR + Cystatin C and urine albumin-to-creatinine ratio (uACR) & subspecialty diagnostics (1,929 CMS services/yr).

✓ Accepts Kaiser Permanente ~$216 Cash
Nephrology ★ 4.6

Dr. Lalitha Bandi, MD

Gainesville, GA 30501

★★★★★ 4.8 (20)
60th GA Pct

Top Billed Procedure: Chronic Kidney Disease eGFR, uACR & Electrolyte Management [CPT 99214] • CKD staging via eGFR + Cystatin C and urine albumin-to-creatinine ratio (uACR) & subspecialty diagnostics (2,123 CMS services/yr).

✓ Accepts Kaiser Permanente ~$209 Cash
Nephrology ★ 4.6

Dr. Brett Rosenthal, DO

Cherry Hill, NJ 08034

★★★★★ 4.8 (20)
51st NJ Pct

Top Billed Procedure: Chronic Kidney Disease eGFR, uACR & Electrolyte Management [CPT 99214] • CKD staging via eGFR + Cystatin C and urine albumin-to-creatinine ratio (uACR) & subspecialty diagnostics (2,109 CMS services/yr).

✓ Accepts Kaiser Permanente ~$209 Cash
Nephrology ★ 4.5

Dr. Daphne Knicely, MD

Fishersville, VA 22939

★★★★★ 4.8 (16)
23rd VA Pct

Top Billed Procedure: Chronic Kidney Disease eGFR, uACR & Electrolyte Management [CPT 99214] • CKD staging via eGFR + Cystatin C and urine albumin-to-creatinine ratio (uACR) & subspecialty diagnostics (1,213 CMS services/yr).

✓ Accepts Kaiser Permanente ~$209 Cash
Nephrology ★ 4.6

Dr. John Mihaltses, DO

Wilmington, NC 28401

★★★★★ 4.8 (24)
63rd NC Pct

Top Billed Procedure: Chronic Kidney Disease eGFR, uACR & Electrolyte Management [CPT 99214] • CKD staging via eGFR + Cystatin C and urine albumin-to-creatinine ratio (uACR) & subspecialty diagnostics (2,207 CMS services/yr).

✓ Accepts Kaiser Permanente ~$209 Cash
Nephrology ★ 4.6

Dr. Alonso Diaz, MD

Bridgeville, PA 15017

★★★★★ 4.8 (24)
51st PA Pct

Top Billed Procedure: Chronic Kidney Disease eGFR, uACR & Electrolyte Management [CPT 99214] • CKD staging via eGFR + Cystatin C and urine albumin-to-creatinine ratio (uACR) & subspecialty diagnostics (1,488 CMS services/yr).

✓ Accepts Kaiser Permanente ~$209 Cash
Nephrology ★ 4.8

Dr. Matt Mathew, MD

Roanoke, VA 24014

★★★★★ 4.8 (20)
95th VA Pct

Top Billed Procedure: Chronic Kidney Disease eGFR, uACR & Electrolyte Management [CPT 99214] • CKD staging via eGFR + Cystatin C and urine albumin-to-creatinine ratio (uACR) & subspecialty diagnostics (8,233 CMS services/yr).

✓ Accepts Kaiser Permanente ~$209 Cash
Nephrology ★ 4.8

Dr. Matthew Novak, MD

Mount Vernon, WA 98274

★★★★★ 4.8 (24)
86th WA Pct

Top Billed Procedure: Chronic Kidney Disease eGFR, uACR & Electrolyte Management [CPT 99214] • CKD staging via eGFR + Cystatin C and urine albumin-to-creatinine ratio (uACR) & subspecialty diagnostics (3,373 CMS services/yr).

✓ Accepts Kaiser Permanente ~$222 Cash
Nephrology ★ 4.7

Dr. Justin Merszei, MD

Houston, TX 77025

★★★★★ 4.8 (20)
51st TX Pct

Top Billed Procedure: Chronic Kidney Disease eGFR, uACR & Electrolyte Management [CPT 99214] • CKD staging via eGFR + Cystatin C and urine albumin-to-creatinine ratio (uACR) & subspecialty diagnostics (1,874 CMS services/yr).

✓ Accepts Kaiser Permanente ~$212 Cash
Nephrology ★ 4.6

Dr. David Yoo, MD

Manassas, VA 20110

★★★★★ 4.8 (24)
39th VA Pct

Top Billed Procedure: Chronic Kidney Disease eGFR, uACR & Electrolyte Management [CPT 99214] • CKD staging via eGFR + Cystatin C and urine albumin-to-creatinine ratio (uACR) & subspecialty diagnostics (1,652 CMS services/yr).

✓ Accepts Kaiser Permanente ~$209 Cash
Nephrology ★ 4.5

Dr. Daniel Louvar, MD

Fargo, ND 58102

★★★★★ 4.8 (24)
17th ND Pct

Top Billed Procedure: Chronic Kidney Disease eGFR, uACR & Electrolyte Management [CPT 99214] • CKD staging via eGFR + Cystatin C and urine albumin-to-creatinine ratio (uACR) & subspecialty diagnostics (1,505 CMS services/yr).

✓ Accepts Kaiser Permanente ~$209 Cash
Nephrology ★ 4.8

Dr. Karl Pembaur, MD

Cincinnati, OH 45219

★★★★★ 4.8 (24)
79th OH Pct

Top Billed Procedure: Chronic Kidney Disease eGFR, uACR & Electrolyte Management [CPT 99214] • CKD staging via eGFR + Cystatin C and urine albumin-to-creatinine ratio (uACR) & subspecialty diagnostics (1,889 CMS services/yr).

✓ Accepts Kaiser Permanente ~$209 Cash
Nephrology ★ 4.7

Dr. Jones Samuel, MD

Baton Rouge, LA 70808

★★★★★ 4.8 (20)
62nd LA Pct

Top Billed Procedure: Chronic Kidney Disease eGFR, uACR & Electrolyte Management [CPT 99214] • CKD staging via eGFR + Cystatin C and urine albumin-to-creatinine ratio (uACR) & subspecialty diagnostics (2,265 CMS services/yr).

✓ Accepts Kaiser Permanente ~$209 Cash
Nephrology ★ 4.6
★★★★★ 4.8 (20)
46th MS Pct

Top Billed Procedure: Chronic Kidney Disease eGFR, uACR & Electrolyte Management [CPT 99214] • CKD staging via eGFR + Cystatin C and urine albumin-to-creatinine ratio (uACR) & subspecialty diagnostics (1,709 CMS services/yr).

✓ Accepts Kaiser Permanente ~$209 Cash
Interactive 60-Second “Show This to Your Doctor” Visit & CPT Builder • Defends Against the 11-Second Interruption Rule (PMID 29972200)

Walk Into Your 15-Minute Appointment With Exact Labs, CPT Codes & Opening Words

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:

15-Minute Exam-Room Agenda • High-Volume Endocrinology

Hypothyroidism, Subclinical TSH Drift (2.5–8.0 mIU/L) or Thyroid Nodule

1. Your 10-Second Opening Script (Read Verbatim Before the 11-Second Interruption)

"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)?"

2. In-Office Medicare CPT Procedures to Verify Before Booking
CPT 76536 In-Office High-Resolution Thyroid & Neck Ultrasound

Confirms the endocrinologist images thyroid nodules themselves rather than sending you to a hospital radiology department.

CPT 60100 Ultrasound-Guided Fine-Needle Aspiration (FNA) Biopsy

Identifies structural thyroid specialists vs. general diabetes-only clinics.

3. Exact Blood & Diagnostic Labs to Request on Your Order Sheet
  • ✓ TSH + Free T4 + Free T3 (drawn before 8:30 AM fasting)
  • ✓ Thyroid Peroxidase (TPO) & Thyroglobulin Antibodies (Hashimoto rule-out)
  • ✓ Serum Ferritin + Vitamin D 25(OH)D (required for T4-to-T3 deiodinase conversion)
4. Day-1 Pre-Appointment Rule

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.

Patient Triage & Insurance Verification Guide

Frequently Asked Questions: Choosing a Specialist by CPT Volume & Insurance Network

Why does CMS Medicare Part B procedure volume matter when choosing a specialist?

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.

How does dotMD prevent health-system lab rollups and low-rated clinics from skewing Page 1?

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.

How does the GreatDoc™ Star Rating separate bedside manner from front-desk billing complaints?

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.

How do I verify if a doctor takes my specific PPO, HMO, or Medicare plan?

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.