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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 28 of 66
Nephrology ★ 4.7

Dr. Kristin Matteson, DO

Amherst, NY 14228

★★★★★ 4.8 (24)
48th 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 (1,455 CMS services/yr).

✓ Accepts Cigna ~$232 Cash
Nephrology ★ 4.6

Dr. Edward Walshe, MD

Burlington, MA 01805

★★★★★ 4.8 (20)
56th 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 (1,524 CMS services/yr).

✓ Accepts Cigna ~$224 Cash
Nephrology ★ 4.7

Dr. Ashte Collins, MD

Washington, DC 20037

★★★★★ 4.8 (24)
45th DC 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 (1,326 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.7

Dr. Imad Ahmed, MD

Amherst, NY 14228

★★★★★ 4.8 (20)
58th 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 (1,753 CMS services/yr).

✓ Accepts Cigna ~$232 Cash
Nephrology ★ 4.4
★★★★★ 4.8 (16)
10th 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 (911 CMS services/yr).

✓ Accepts Cigna ~$216 Cash
Nephrology ★ 4.8

Dr. Muhammad Alam, MD

Little Rock, AR 72205

★★★★★ 4.8 (23)
82nd 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 (3,334 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.7

Dr. Robert Bruha, MD

Normal, IL 61761

★★★★★ 4.8 (23)
70th 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 (2,821 CMS services/yr).

✓ Accepts Cigna ~$218 Cash
Nephrology ★ 4.6

Dr. Charles Nnewihe, MD

Northfield, NJ 08225

★★★★★ 4.8 (19)
62nd 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 (2,558 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.7

Dr. Iyad Barakat, MD

Warner Robins, GA 31088

★★★★★ 4.8 (23)
55th 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 (1,957 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.8

Dr. Rayane Nassar, MD

Wichita, KS 67214

★★★★★ 4.8 (15)
92nd 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 (9,274 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.7

Dr. Deirdre Collins, MD

Willow Grove, PA 19090

★★★★★ 4.8 (15)
47th 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 (1,434 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.7

Dr. Joshua Hundert, MD

Dorchester, MA 02124

★★★★★ 4.8 (23)
77th 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 (2,154 CMS services/yr).

✓ Accepts Cigna ~$224 Cash
Nephrology ★ 4.8

Dr. Sajid George, MD

Richmond, VA 23294

★★★★★ 4.8 (19)
76th 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 (2,847 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.8

Dr. Ivan Maya, MD

Lake Mary, FL 32746

★★★★★ 4.8 (15)
90th 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 (4,886 CMS services/yr).

✓ Accepts Cigna ~$216 Cash
Nephrology ★ 4.6

Dr. Faizan Babar, MD

Lexington, KY 40504

★★★★★ 4.8 (23)
42nd 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 (1,918 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.5

Dr. Muhammad Rafiq, MD

Columbia, SC 29204

★★★★★ 4.8 (23)
41st 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 (2,146 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.6

Dr. Kezia Alberto, MD

Florham Park, NJ 07932

★★★★★ 4.8 (23)
57th 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 (2,368 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.8

Dr. Stanley Kim, MD

Edison, NJ 08820

★★★★★ 4.8 (23)
96th 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 (10,349 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.7

Dr. Christiane Mbianda, MD

Mishawaka, IN 46545

★★★★★ 4.8 (15)
61st IN 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 (1,971 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.6

Dr. Ejikeme Obasi, MD

Evergreen Park, IL 60805

★★★★★ 4.8 (19)
46th 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 (1,983 CMS services/yr).

✓ Accepts Cigna ~$218 Cash
Nephrology ★ 4.5

Dr. Gary Schwartz, MD

Rochester, MN 55905

★★★★★ 4.8 (15)
27th MN 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 (820 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.8

Dr. Viet Nguyen, MD

San Diego, CA 92103

★★★★★ 4.8 (19)
83rd 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 (4,866 CMS services/yr).

✓ Accepts Cigna ~$239 Cash
Nephrology ★ 4.7

Dr. Gwendolen Chang, MD

San Leandro, CA 94578

★★★★★ 4.8 (19)
62nd 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 (2,601 CMS services/yr).

✓ Accepts Cigna ~$239 Cash
Nephrology ★ 4.5

Dr. Aedan Olaso, MD

Allentown, PA 18103

★★★★★ 4.8 (19)
53rd 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 (1,507 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.6

Dr. John Kasey, DO

Ashland, KY 41101

★★★★★ 4.8 (19)
32nd 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 (1,590 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.8

Dr. Jonah Licht, MD

Providence, RI 02906

★★★★★ 4.8 (15)
81st RI 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 (3,072 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.8

Dr. Regan Seipp, MD

Winfield, IL 60190

★★★★★ 4.8 (23)
90th 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 (4,543 CMS services/yr).

✓ Accepts Cigna ~$218 Cash
Nephrology ★ 4.7

Dr. John Videen, MD

Chula Vista, CA 91911

★★★★★ 4.8 (19)
53rd 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 (2,226 CMS services/yr).

✓ Accepts Cigna ~$239 Cash
Nephrology ★ 4.8

Dr. Daniel Lin, MD

Doylestown, PA 18901

★★★★★ 4.8 (15)
81st 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 (2,131 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.6

Dr. Anjana Jagalur, MD

Lewisville, TX 75057

★★★★★ 4.8 (23)
56th 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 (2,066 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.7

Dr. Jay Shah, MD

Camp Hill, PA 17011

★★★★★ 4.8 (15)
68th 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 (1,773 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.6

Dr. Matthew Trainor, MD

Worcester, MA 01655

★★★★★ 4.8 (15)
53rd 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 (1,505 CMS services/yr).

✓ Accepts Cigna ~$224 Cash
Nephrology ★ 4.5

Dr. Muhammed Rahman, MD

Stockbridge, GA 30281

★★★★★ 4.8 (15)
31st 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 (1,387 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.8

Dr. Erik Daniels, MD

St Louis, MO 63136

★★★★★ 4.8 (23)
75th 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 (2,066 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.7

Dr. Ronald Gaines, MD

Mobile, AL 36608

★★★★★ 4.8 (19)
47th AL 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 (1,782 CMS services/yr).

✓ Accepts Cigna ~$209 Cash
Nephrology ★ 4.7

Dr. Nicole Kemper, MD

Portland, OR 97225

★★★★★ 4.8 (23)
51st 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 (1,756 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.