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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 43 of 66
Nephrology ★ 4.5

Dr. Ameer Abdulrazzak, MD

Roseville, MI 48066

★★★★★ 4.7 (22)
63rd 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 (1,966 CMS services/yr).

✓ Accepts Kaiser Permanente ~$209 Cash
Nephrology ★ 4.5

Dr. Stephen Osaguona, MD

Columbia, SC 29204

★★★★★ 4.7 (18)
52nd 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 (2,495 CMS services/yr).

✓ Accepts Kaiser Permanente ~$209 Cash
Nephrology ★ 4.5

Dr. Ravinder Wali, MD

Worcester, MA 01655

★★★★★ 4.7 (22)
40th 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 (1,268 CMS services/yr).

✓ Accepts Kaiser Permanente ~$224 Cash
Nephrology ★ 4.5

Dr. James Tomas, MD

San Bernardino, CA 92404

★★★★★ 4.7 (22)
34th 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 (1,634 CMS services/yr).

✓ Accepts Kaiser Permanente ~$239 Cash
Nephrology ★ 4.8

Dr. Carolyne Jepkorir, MD

Indianapolis, IN 46227

★★★★★ 4.7 (18)
84th 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 (3,043 CMS services/yr).

✓ Accepts Kaiser Permanente ~$209 Cash
Nephrology ★ 4.4

Dr. Larissa Kruger Gomes, MD

East Providence, RI 02914

★★★★★ 4.7 (18)
29th 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 (1,326 CMS services/yr).

✓ Accepts Kaiser Permanente ~$209 Cash
Nephrology ★ 4.5

Dr. John Idoux, MD

Temple, TX 76502

★★★★★ 4.7 (18)
19th 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 (1,047 CMS services/yr).

✓ Accepts Kaiser Permanente ~$209 Cash
Nephrology ★ 4.5

Dr. Tariq Shah, MD

Los Angeles, CA 90017

★★★★★ 4.7 (22)
30th 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 (1,479 CMS services/yr).

✓ Accepts Kaiser Permanente ~$231 Cash
Nephrology ★ 4.5

Dr. Abdul Buridi, MD

Louisville, KY 40202

★★★★★ 4.7 (18)
46th 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 (1,976 CMS services/yr).

✓ Accepts Kaiser Permanente ~$209 Cash
Nephrology ★ 4.7

Dr. Krishnan Babu, MD

Springfield, MA 01107

★★★★★ 4.7 (21)
86th 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 (3,320 CMS services/yr).

✓ Accepts Kaiser Permanente ~$224 Cash
Nephrology ★ 4.6

Dr. Jusmin Patel, MD

Reno, NV 89511

★★★★★ 4.7 (21)
49th NV 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 (1,796 CMS services/yr).

✓ Accepts Kaiser Permanente ~$209 Cash
Nephrology ★ 4.6

Dr. Benjamin Studdard, MD

Murfreesboro, TN 37129

★★★★★ 4.7 (21)
60th 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 (2,716 CMS services/yr).

✓ Accepts Kaiser Permanente ~$201 Cash
Nephrology ★ 4.5

Dr. Vignesh Viswanathan, MD

Des Moines, IA 50309

★★★★★ 4.7 (21)
37th 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 (1,991 CMS services/yr).

✓ Accepts Kaiser Permanente ~$209 Cash
Nephrology ★ 4.7

Dr. Rajesh Boorgu, MD

Florence, AL 35630

★★★★★ 4.7 (21)
96th 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 (11,417 CMS services/yr).

✓ Accepts Kaiser Permanente ~$209 Cash
Nephrology ★ 4.7

Dr. Ravi Lakdawala, MD

Beverly Hills, CA 90211

★★★★★ 4.7 (17)
89th 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 (6,627 CMS services/yr).

✓ Accepts Kaiser Permanente ~$239 Cash
Nephrology ★ 4.6

Dr. Harol Valenzuela, MD

Englewood, NJ 07631

★★★★★ 4.7 (21)
53rd 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 (2,206 CMS services/yr).

✓ Accepts Kaiser Permanente ~$209 Cash
Nephrology ★ 4.6

Dr. Carl Shealy, MD

Columbia, SC 29203

★★★★★ 4.7 (17)
76th 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 (3,738 CMS services/yr).

✓ Accepts Kaiser Permanente ~$209 Cash
Nephrology ★ 4.7

Dr. Rajan Regmi, MD

Waukesha, WI 53186

★★★★★ 4.7 (17)
90th 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 (2,827 CMS services/yr).

✓ Accepts Kaiser Permanente ~$209 Cash
Nephrology ★ 4.6
★★★★★ 4.7 (17)
72nd 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 (3,570 CMS services/yr).

✓ Accepts Kaiser Permanente ~$209 Cash
Nephrology ★ 4.7

Dr. Marisela Varela, MD

Merrillville, IN 46410

★★★★★ 4.7 (21)
79th 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 (2,558 CMS services/yr).

✓ Accepts Kaiser Permanente ~$209 Cash
Nephrology ★ 4.7

Dr. Sneha Shrestha, MD

Florham Park, NJ 07932

★★★★★ 4.7 (21)
86th 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 (1,726 CMS services/yr).

✓ Accepts Kaiser Permanente ~$209 Cash
Nephrology ★ 4.6

Dr. Gates Colbert, MD

Dallas, TX 75246

★★★★★ 4.7 (21)
65th 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 (2,487 CMS services/yr).

✓ Accepts Kaiser Permanente ~$211 Cash
Nephrology ★ 4.7

Dr. Andrew Covit, MD

South River, NJ 08882

★★★★★ 4.7 (17)
78th 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 (3,410 CMS services/yr).

✓ Accepts Kaiser Permanente ~$209 Cash
Nephrology ★ 4.7

Dr. Kamyar Kamjoo, MD

Tarzana, CA 91356

★★★★★ 4.7 (17)
95th 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 (12,386 CMS services/yr).

✓ Accepts Kaiser Permanente ~$239 Cash
Nephrology ★ 4.8

Dr. Cynthia Sfeir, MD

Beverly, MA 01915

★★★★★ 4.7 (21)
94th 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 (7,143 CMS services/yr).

✓ Accepts Kaiser Permanente ~$224 Cash
Nephrology ★ 4.7

Dr. Mario Assouad, MD

Houston, TX 77054

★★★★★ 4.7 (17)
62nd 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 (2,310 CMS services/yr).

✓ Accepts Kaiser Permanente ~$212 Cash
Nephrology ★ 4.4

Dr. Christopher Enoch, DO

Youngstown, OH 44504

★★★★★ 4.7 (21)
30th 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 (1,037 CMS services/yr).

✓ Accepts Kaiser Permanente ~$209 Cash
Nephrology ★ 4.7

Dr. Sam Rae, MD

Wayne, NJ 07470

★★★★★ 4.7 (21)
76th 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 (3,210 CMS services/yr).

✓ Accepts Kaiser Permanente ~$209 Cash
Nephrology ★ 4.5

Dr. Michael Oliverio, MD

Raleigh, NC 27609

★★★★★ 4.7 (17)
33rd 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 (1,283 CMS services/yr).

✓ Accepts Kaiser Permanente ~$209 Cash
Nephrology ★ 4.7

Dr. Patrick Mcglynn, MD

Mountain View, CA 94040

★★★★★ 4.7 (17)
68th 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 (2,892 CMS services/yr).

✓ Accepts Kaiser Permanente ~$239 Cash
Nephrology ★ 4.4

Dr. Mary Cameron, MD

Tulsa, OK 74136

★★★★★ 4.7 (21)
15th 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 (1,028 CMS services/yr).

✓ Accepts Kaiser Permanente ~$209 Cash
Nephrology ★ 4.5

Dr. Mohammed Neyaz, DO

Escondido, CA 92025

★★★★★ 4.7 (21)
32nd 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 (1,586 CMS services/yr).

✓ Accepts Kaiser Permanente ~$239 Cash
Nephrology ★ 4.5

Dr. Valerie Duhn, MD

Kalamazoo, MI 49007

★★★★★ 4.7 (21)
21st 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 (998 CMS services/yr).

✓ Accepts Kaiser Permanente ~$209 Cash
Nephrology ★ 4.5
★★★★★ 4.7 (17)
34th 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 (1,101 CMS services/yr).

✓ Accepts Kaiser Permanente ~$209 Cash
Nephrology ★ 4.7

Dr. Jany Moussa, MD

Wichita, KS 67214

★★★★★ 4.7 (24)
89th 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 (9,245 CMS services/yr).

✓ Accepts Kaiser Permanente ~$209 Cash
Nephrology ★ 4.8

Dr. Padma Yarlagadda, MD

San Jose, CA 95116

★★★★★ 4.7 (24)
81st 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 (4,503 CMS services/yr).

✓ Accepts Kaiser Permanente ~$239 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.