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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 7 of 66
Nephrology ★ 4.6

Dr. Jeffrey Krahling, MD

Redding, CA 96003

★★★★★ 4.7 (26)
64th 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 (2,647 CMS services/yr).

✓ Accepts Humana ~$239 Cash
Nephrology ★ 4.6

Dr. Artashes Patrikyan, MD

Glendale, CA 91204

★★★★★ 4.7 (26)
87th 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 (5,609 CMS services/yr).

✓ Accepts Humana ~$239 Cash
Nephrology ★ 4.7

Dr. Fawad Zafar-Khan, MD

Santa Monica, CA 90404

★★★★★ 4.7 (26)
86th 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 (5,458 CMS services/yr).

✓ Accepts Humana ~$239 Cash
Nephrology ★ 4.7

Dr. Andrew Ross, MD

Orange, CA 92868

★★★★★ 4.7 (26)
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 (3,217 CMS services/yr).

✓ Accepts Humana ~$239 Cash
Nephrology ★ 4.4
★★★★★ 4.7 (26)
17th 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 (1,277 CMS services/yr).

✓ Accepts Humana ~$209 Cash
Nephrology ★ 4.6
★★★★★ 4.7 (26)
69th 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 (2,843 CMS services/yr).

✓ Accepts Humana ~$216 Cash
Nephrology ★ 4.6

Dr. Muhammad Afzal, MD

Tulsa, OK 74136

★★★★★ 4.7 (26)
52nd OK 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 (2,141 CMS services/yr).

✓ Accepts Humana ~$209 Cash
Nephrology ★ 4.6

Dr. Brijesh Kapoor, MD

Live Oak, TX 78233

★★★★★ 4.7 (26)
79th 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 (3,164 CMS services/yr).

✓ Accepts Humana ~$209 Cash
Nephrology ★ 4.6

Dr. Frederick Fleszler, MD

Allentown, PA 18103

★★★★★ 4.7 (26)
62nd 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 (1,645 CMS services/yr).

✓ Accepts Humana ~$209 Cash
Nephrology ★ 4.5

Dr. Ravinder Sindhwani, MD

White Plains, MD 20695

★★★★★ 4.7 (26)
58th 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 (1,872 CMS services/yr).

✓ Accepts Humana ~$209 Cash
Nephrology ★ 4.6

Dr. Vijay Mudunuri, MD

Folsom, CA 95630

★★★★★ 4.7 (26)
65th 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 (2,707 CMS services/yr).

✓ Accepts Humana ~$239 Cash
Nephrology ★ 4.6

Dr. Ari Geller, DO

Bloomfield, CT 06002

★★★★★ 4.7 (26)
37th CT 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 (1,169 CMS services/yr).

✓ Accepts Humana ~$209 Cash
Nephrology ★ 4.6

Dr. Amir Abdi Pour, MD

Loma Linda, CA 92354

★★★★★ 4.7 (26)
23rd 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 (1,266 CMS services/yr).

✓ Accepts Humana ~$239 Cash
Nephrology ★ 4.7

Dr. Hetal Shah, MD

Olympia, WA 98506

★★★★★ 4.7 (26)
87th 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 (3,536 CMS services/yr).

✓ Accepts Humana ~$222 Cash
Nephrology ★ 4.8

Dr. Benjamin Huang, MD

Fort Walton Beach, FL 32547

★★★★★ 4.7 (25)
87th 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 (4,230 CMS services/yr).

✓ Accepts Humana ~$216 Cash
Nephrology ★ 4.7

Dr. David Widmyer, DO

Venice, FL 34292

★★★★★ 4.7 (25)
91st 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 (5,153 CMS services/yr).

✓ Accepts Humana ~$216 Cash
Nephrology ★ 4.5

Dr. Hany Girgis, MD

Merritt Island, FL 32952

★★★★★ 4.7 (25)
60th 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 (2,472 CMS services/yr).

✓ Accepts Humana ~$216 Cash
Nephrology ★ 4.7

Dr. Andreea Poenariu, MD

Jacksonville, FL 32207

★★★★★ 4.7 (25)
73rd 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 (3,095 CMS services/yr).

✓ Accepts Humana ~$216 Cash
Nephrology ★ 4.8

Dr. Hsien Ta Fang, MD

Naperville, IL 60540

★★★★★ 4.7 (25)
99th 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 (22,255 CMS services/yr).

✓ Accepts Humana ~$218 Cash
Nephrology ★ 4.6

Dr. Joshua Trob, MD

Libertyville, IL 60048

★★★★★ 4.7 (25)
63rd 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 (2,576 CMS services/yr).

✓ Accepts Humana ~$218 Cash
Nephrology ★ 4.5

Dr. Xavier Guerrero, DO

Sarasota, FL 34239

★★★★★ 4.7 (25)
69th 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 (2,852 CMS services/yr).

✓ Accepts Humana ~$216 Cash
Nephrology ★ 4.6

Dr. Ashutosh Lohe, MD

Barbourville, KY 40906

★★★★★ 4.7 (25)
59th 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 (2,570 CMS services/yr).

✓ Accepts Humana ~$209 Cash
Nephrology ★ 4.8

Dr. Jeffrey Sewell, MD

San Antonio, TX 78217

★★★★★ 4.7 (25)
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 (3,747 CMS services/yr).

✓ Accepts Humana ~$209 Cash
Nephrology ★ 4.6

Dr. Abraham Rajan, MD

Temple, TX 76504

★★★★★ 4.7 (25)
41st 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 (1,603 CMS services/yr).

✓ Accepts Humana ~$209 Cash
Nephrology ★ 4.7

Dr. Edgard Vera Tapia, MD

Victorville, CA 92395

★★★★★ 4.7 (25)
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 (3,245 CMS services/yr).

✓ Accepts Humana ~$239 Cash
Nephrology ★ 4.6

Dr. Shane Kimball, DO

Little Rock, AR 72205

★★★★★ 4.7 (25)
78th 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 (3,141 CMS services/yr).

✓ Accepts Humana ~$209 Cash
Nephrology ★ 4.7

Dr. Ameesh Garg, MD

Mesa, AZ 85206

★★★★★ 4.7 (25)
73rd 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 (3,841 CMS services/yr).

✓ Accepts Humana ~$207 Cash
Nephrology ★ 4.7

Dr. Abha Saxena, MD

Cedar Rapids, IA 52401

★★★★★ 4.7 (25)
73rd IA 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 (3,013 CMS services/yr).

✓ Accepts Humana ~$209 Cash
Nephrology ★ 4.5

Dr. Sohail Saleem, MD

Gainesville, GA 30501

★★★★★ 4.7 (25)
51st 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 (1,873 CMS services/yr).

✓ Accepts Humana ~$209 Cash
Nephrology ★ 4.7

Dr. Ameet Karambelkar, MD

Bridgeville, PA 15017

★★★★★ 4.7 (25)
61st 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 (1,631 CMS services/yr).

✓ Accepts Humana ~$209 Cash
Nephrology ★ 4.5

Dr. Harlan Rust, MD

Norfolk, VA 23507

★★★★★ 4.7 (25)
36th 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 (1,575 CMS services/yr).

✓ Accepts Humana ~$209 Cash
Nephrology ★ 4.8

Dr. Brian Donner, DO

Wilmington, NC 28401

★★★★★ 5.0 (22)
90th 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 (6,337 CMS services/yr).

✓ Accepts Humana ~$209 Cash
Nephrology ★ 4.8

Dr. Manisha Patel, MD

Bridgewater, NJ 08807

★★★★★ 5.0 (22)
81st 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 (3,558 CMS services/yr).

✓ Accepts Humana ~$209 Cash
Nephrology ★ 4.9

Dr. Keiko Greenberg, MD

Baltimore, MD 21287

★★★★★ 5.0 (18)
86th 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 (1,248 CMS services/yr).

✓ Accepts Humana ~$209 Cash
Nephrology ★ 4.9

Dr. Mirza Hamirani, MD

Vienna, WV 26105

★★★★★ 4.9 (21)
81st 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 (3,136 CMS services/yr).

✓ Accepts Humana ~$209 Cash
Nephrology ★ 4.9

Dr. Hafiz Sroya, MD

Albuquerque, NM 87106

★★★★★ 4.9 (21)
92nd 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 (2,790 CMS services/yr).

✓ Accepts Humana ~$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.