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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 36 of 66
Nephrology ★ 4.7

Dr. Christopher Wong, DO

San Dimas, CA 91773

★★★★★ 4.8 (24)
74th 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 (3,372 CMS services/yr).

✓ Accepts Cigna ~$239 Cash
Nephrology ★ 4.7

Dr. Reji John, MD

Beaumont, TX 77702

★★★★★ 4.8 (24)
74th 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 (2,959 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.6

Dr. Nauman Siddiqi, MD

Zephyrhills, FL 33542

★★★★★ 4.8 (24)
58th 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 (2,397 CMS services/yr).

✓ Accepts Cigna ~$216 Cash
Nephrology ★ 4.5

Dr. Sammy Nassri, MD

Orangeburg, SC 29118

★★★★★ 4.8 (24)
22nd SC 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 (1,455 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.6

Dr. Al Lee, DO

Scranton, PA 18510

★★★★★ 4.8 (24)
54th 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 (1,511 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.6

Dr. Sharmini Jayamaha, MD

Riverhead, NY 11901

★★★★★ 4.8 (24)
56th 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 (1,671 CMS services/yr).

✓ Accepts Cigna ~$232 Cash
Nephrology ★ 4.8

Dr. Abdul Khan, MBBS

Eau Claire, WI 54703

★★★★★ 4.8 (24)
95th WI 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 (1,424 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.5
★★★★★ 4.8 (16)
51st 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 (1,683 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.8

Dr. Thomas Smarz, MD

Charlotte, NC 28277

★★★★★ 4.8 (16)
95th 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 (8,109 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.6

Dr. Michael Dunn, DO

Bethlehem, PA 18015

★★★★★ 4.8 (16)
55th 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 (1,534 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.7

Dr. Maria Devita, MD

New York, NY 10075

★★★★★ 4.8 (16)
55th 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 (1,613 CMS services/yr).

✓ Accepts Cigna ~$239 Cash
Nephrology ★ 4.6

Dr. Karandeep Shergill, MD

Myrtle Beach, SC 29572

★★★★★ 4.8 (24)
85th SC 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 (4,548 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.8
★★★★★ 4.8 (24)
86th OR 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 (7,353 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.7

Dr. James Onyirimba, MD

Jackson, MS 39213

★★★★★ 4.8 (24)
75th 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 (2,575 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.5

Dr. Tarun Chugh, MD

Mesa, AZ 85206

★★★★★ 4.8 (24)
40th 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 (2,006 CMS services/yr).

✓ Accepts Cigna ~$207 Cash
Nephrology ★ 4.7

Dr. Archana Dhawan, MD

San Jose, CA 95124

★★★★★ 4.8 (16)
73rd 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 (3,237 CMS services/yr).

✓ Accepts Cigna ~$239 Cash
Nephrology ★ 4.6
★★★★★ 4.8 (24)
39th 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 (1,883 CMS services/yr).

✓ Accepts Cigna ~$216 Cash
Nephrology ★ 4.6

Dr. Otis Gowdy, MD

Meridian, MS 39301

★★★★★ 4.8 (24)
39th 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 (1,660 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.5

Dr. Syed Abidi, MD

Toledo, OH 43608

★★★★★ 4.8 (16)
29th 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 (1,027 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.6

Dr. Elie Fein, MD

Brooklyn, NY 11219

★★★★★ 4.8 (20)
59th 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 (1,870 CMS services/yr).

✓ Accepts Cigna ~$232 Cash
Nephrology ★ 4.5

Dr. Tomonori Oyadomari, MD

Saint Joseph, MO 64506

★★★★★ 4.8 (24)
26th 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 (1,010 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.5

Dr. Shraddha Rana, MD

Santa Cruz, CA 95062

★★★★★ 4.8 (16)
38th 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 (1,762 CMS services/yr).

✓ Accepts Cigna ~$239 Cash
Nephrology ★ 4.6

Dr. Raul Hernandez, MD

Zanesville, OH 43701

★★★★★ 4.8 (20)
59th 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 (1,459 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.6

Dr. Mirjana Dimitrijevic, MD

Roseville, MI 48066

★★★★★ 4.8 (20)
71st 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 (2,224 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.6
★★★★★ 4.8 (20)
51st 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 (1,687 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.5

Dr. Vince Ha, MD

Corona, CA 92881

★★★★★ 4.8 (24)
41st 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 (1,809 CMS services/yr).

✓ Accepts Cigna ~$239 Cash
Nephrology ★ 4.8

Dr. Eli Roza, MD

Hagerstown, MD 21742

★★★★★ 4.8 (24)
95th MD 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 (3,903 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.6

Dr. Jeffrey Hoggard, MD

Raleigh, NC 27610

★★★★★ 4.8 (20)
32nd 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 (1,277 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.5

Dr. Ernest Savransky, MD

Eatontown, NJ 07724

★★★★★ 4.8 (16)
25th 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 (1,291 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.5

Dr. Anna Burgner, MD

Nashville, TN 37232

★★★★★ 4.8 (20)
13th 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 (917 CMS services/yr).

✓ Accepts Cigna ~$202 Cash
Nephrology ★ 4.8

Dr. Vesh Srivatana, MD

New York, NY 10021

★★★★★ 4.8 (24)
77th 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 (3,880 CMS services/yr).

✓ Accepts Cigna ~$239 Cash
Nephrology ★ 4.7

Dr. Manuel Montero, MD

New Bern, NC 28562

★★★★★ 4.8 (24)
82nd 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 (4,604 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.8

Dr. Sara Atallah, MD

Fairfield, OH 45014

★★★★★ 4.8 (20)
77th 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 (1,869 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.6

Dr. Ali Suleiman, MD

Beckley, WV 25801

★★★★★ 4.8 (16)
56th WV 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 (2,022 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.5

Dr. Genta Uehara, MD

Charleston, SC 29425

★★★★★ 4.8 (16)
6th SC 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 (803 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.4

Dr. Jiny Olickal, MD

Saint Joseph, MO 64506

★★★★★ 4.8 (20)
18th 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 (875 CMS services/yr).

✓ Accepts Cigna ~$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.