Looking for a specialist who listens and takes your insurance? Ask patients in our community. Compare real-world patient outcomes, lab numbers, and doctor visit tips—100% free with a private @handle and zero login wall.
Click to Ask a Question or Post Your Experience ▾
Post to Gut, Labs & Supplements Space (15 Seconds • No Account or Email Required)
Or read existing discussions in Gut, Labs & Supplements Space →
749,040 Verified U.S. Physicians • 51 States & Territories • Zero Sponsored Placements
Preparing for an appointment? Jump to our 60-Second Visit Script Builder ↓

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 22 of 66
Nephrology ★ 4.5
★★★★★ 4.9 (21)
12th 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 (972 CMS services/yr).

✓ Accepts Cigna ~$227 Cash
Nephrology ★ 4.8

Dr. Christopher Meshberger, MD

Chattanooga, TN 37404

★★★★★ 4.9 (24)
93rd 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 (11,615 CMS services/yr).

✓ Accepts Cigna ~$201 Cash
Nephrology ★ 4.8

Dr. Atul Maini, MD

Maspeth, NY 11378

★★★★★ 4.9 (20)
84th 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 (5,035 CMS services/yr).

✓ Accepts Cigna ~$232 Cash
Nephrology ★ 4.7

Dr. Lakshmi Duvvur, MD

Topeka, KS 66606

★★★★★ 4.9 (24)
65th KS 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 (4,837 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.7

Dr. Ahmed Elsharkawi, MD

Brunswick, GA 31520

★★★★★ 4.9 (24)
85th 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 (4,630 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.7

Dr. Abdel Abu Shamat, MD

Lake Charles, LA 70601

★★★★★ 4.9 (16)
83rd 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 (3,247 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.7

Dr. Umesh Patel, MD

Crystal Lake, IL 60014

★★★★★ 4.9 (20)
77th 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 (3,084 CMS services/yr).

✓ Accepts Cigna ~$218 Cash
Nephrology ★ 4.7

Dr. Fakhar Ijaz, MD

Little Rock, AR 72205

★★★★★ 4.9 (16)
80th AR 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 (3,321 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.8

Dr. Joanna Niemiec, MD

Rockford, IL 61107

★★★★★ 4.9 (20)
94th 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 (5,421 CMS services/yr).

✓ Accepts Cigna ~$218 Cash
Nephrology ★ 4.7

Dr. Andrew Briglia, DO

Annapolis, MD 21401

★★★★★ 4.9 (24)
53rd 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 (1,776 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.7
★★★★★ 4.9 (16)
80th MA 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 (2,334 CMS services/yr).

✓ Accepts Cigna ~$224 Cash
Nephrology ★ 4.7

Dr. Victoria Vo, MD

Prescott, AZ 86301

★★★★★ 4.9 (24)
59th 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 (2,701 CMS services/yr).

✓ Accepts Cigna ~$207 Cash
Nephrology ★ 4.6

Dr. Michael Lambert, MD

Shawnee, KS 66226

★★★★★ 4.9 (16)
38th KS 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 (1,950 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.7
★★★★★ 4.9 (24)
63rd MA 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 (1,747 CMS services/yr).

✓ Accepts Cigna ~$224 Cash
Nephrology ★ 4.7

Dr. Matthew Diamond, DO

Augusta, GA 30901

★★★★★ 4.9 (24)
88th 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 (5,653 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.7

Dr. Henry Ayiku, MD

North Charleston, SC 29405

★★★★★ 4.9 (16)
63rd 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 (3,216 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.8
★★★★★ 4.9 (16)
85th 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 (3,901 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.8

Dr. Kim Tran, MD

Gainesville, GA 30501

★★★★★ 4.9 (24)
92nd 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 (9,105 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.6

Dr. Tamil Kuppusamy, MD

Catonsville, MD 21228

★★★★★ 4.9 (16)
33rd 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 (1,500 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.6

Dr. Majid Khan, MD

Willow Grove, PA 19090

★★★★★ 4.9 (24)
41st 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 (1,351 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.6
★★★★★ 4.9 (24)
50th 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 (1,865 CMS services/yr).

✓ Accepts Cigna ~$211 Cash
Nephrology ★ 4.6

Dr. Nikunjkumar Patel, MD

Philadelphia, PA 19140

★★★★★ 4.9 (24)
36th 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 (1,251 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.6

Dr. Mark Schuster, DO

Voorhees, NJ 08043

★★★★★ 4.9 (20)
48th 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 (1,989 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.7

Dr. Melvin Seek, MD

Ocala, FL 34471

★★★★★ 4.9 (20)
53rd 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 (2,261 CMS services/yr).

✓ Accepts Cigna ~$216 Cash
Nephrology ★ 4.5

Dr. Alice Hsu, MD

Garland, TX 75044

★★★★★ 4.9 (24)
40th 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 (1,561 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.7

Dr. Mohamad Morad, MD

Loxahatchee, FL 33470

★★★★★ 4.9 (20)
75th 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 (3,236 CMS services/yr).

✓ Accepts Cigna ~$216 Cash
Nephrology ★ 4.6

Dr. Lara Kfoury, MD

Johnson City, TN 37604

★★★★★ 4.9 (24)
34th 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 (1,457 CMS services/yr).

✓ Accepts Cigna ~$201 Cash
Nephrology ★ 4.6

Dr. Shirin Sharma, MD

San Antonio, TX 78207

★★★★★ 4.9 (20)
37th 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 (1,486 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.8

Dr. Mohamed Shafiu, MD

San Antonio, TX 78253

★★★★★ 4.9 (24)
73rd 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 (2,891 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.6
★★★★★ 4.9 (16)
32nd 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 (1,343 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.6

Dr. Ahmed Al-Absi, MD

Kansas City, MO 64131

★★★★★ 4.9 (24)
40th 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 (1,247 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.6

Dr. Pius Manavalan, MD

Hamilton, OH 45011

★★★★★ 4.9 (20)
37th 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 (1,160 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.7
★★★★★ 4.9 (24)
61st 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 (2,491 CMS services/yr).

✓ Accepts Cigna ~$210 Cash
Nephrology ★ 4.8

Dr. Roopa Shah, MD

Monroe, NC 28112

★★★★★ 4.9 (24)
66th 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 (2,295 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.5

Dr. Yury Kalmanovich, MD

Norfolk, VA 23510

★★★★★ 4.9 (16)
27th 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 (1,295 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.5

Dr. George Vasquez Rios, MD

Albuquerque, NM 87109

★★★★★ 4.9 (16)
7th NM 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 (831 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.