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About

Mercy is a large American nonprofit Catholic healthcare system and hospital network. It operates 40+ acute care and specialty hospitals (notably a major footprint in the Midwest) with a broad outpatient and physician network. Key facts: - Founded in 1871 by the Sisters of Mercy; headquarters in Chesterfield, Missouri. - One of the larger Catholic health systems in the U.S.; over 40,000 employees and more than 2,400 physicians (organization-wide figures vary by source; the page cites ~12,495 employees and $5B revenue for a specific segment, with other sources noting broader staffing). - National reach includes 44 acute care and specialty hospitals and 700+ physician/outpatient clinics across Arkansas, Kansas, Missouri, and Oklahoma, and operations or presence in multiple countries. - Healthcare focus includes hospitals, outpatient clinics, and specialty services such as nephrology. User-specific item: If you’re seeking Mercy Clinic Nephrology at Medical Tower A in Clayton, MO, this Mercy system generally houses nephrology services within its Missouri clinics, but the page does not list a Clayton-specific nephrology location. For exact address, availability, and appointment scheduling, contact Mercy’s main provider network or use the Mercy health system locator/service directory.

Clinic Type

Nephrology

Address

621 S. New Ballas Road, Tower A, Suite 437A, St. Louis, MO 63141

Phone

(314) 251-6344

Email

disabilityaccommodations@mercy.net

Opening Hours

Hours: By appointment only. Please call to schedule.

Services Offered

  • Kidney disease diagnosis and management
  • Acute Kidney Injury
  • Chronic Kidney Disease
  • Hypertension Management
  • Electrolyte Disorders
  • Acid/Base Disorders
  • Kidney Stone Medical Management
  • Nephrotic Syndrome
  • Nephritic Syndrome
  • Anemia Management
  • Cystic Kidney Disease
  • Kidney Transplant Management

Insurance & Payment

Languages Spoken

FAQs

What are the hours of operation?

Hours: By appointment only. Please call to schedule.

Photos

What Patients Say

Overall sentiment across review platforms: positive

  • Mercy Clinic internal post-care survey: 4.8/5 (based on 311 patients for a representative provider) (311)
  • Vitals.com (representative): 2.7 to 4.8 across individual providers (Varies by provider)

Patients praise

  • High patient satisfaction with specific nephrologists
  • Thorough explanations by medical staff
  • Perceived passion and dedication of physicians

Common complaints

  • Limited availability of specific provider ratings in aggregate

"First class experience."

Mercy Clinic patient survey

"Dr. Salahuddin is a godsend. He took extra time and explain thoroughly what was going on with my mother. I really appreciate his patience, wisdom and passion."

LocalityBiz (Mercy Nephrology review)

Synthesized from public review platforms as of Jul 11, 2026 — sources: [1][2][3][4].

Information sourced from the clinic's website as of July 11, 2026.

More nephrology clinics in Clayton

Clayton, MO·Nephrology

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Clayton, MO·Nephrology

St. Louis Kidney Care is a small medical practice based in Saint Louis, Missouri, offering kidney care services across three offices in the U.S. They operate under the name ST. LOUIS KIDNEY, LLC with about 5 employees and modest web traffic (roughly 1,389 monthly visits). Primary contact options include phone numbers listed on their profile. Their offices are located at: - 12855 N Forty Dr, Saint Louis, MO 63141 - 11155 Dunn Rd Ste 211N, St. Louis, MO 63136 - (Other St. Louis location details implied) If you’re looking for kidney care in Clayton specifically, this summary indicates the business has multiple Missouri locations in the St. Louis area, but Clayton is not listed as a separate office. For precise Clayton services or to confirm a convenient location, contact them at the listed numbers or visit their site.

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