Summer Allen, MD - Memorial Health System
Pulmonology • Bay Saint Louis, MS • Since 1946 • Multiple (Gulfport, Biloxi) locations
About
Memorial Health System is a nonprofit healthcare system based in Gulfport, Mississippi, serving the south Mississippi and Gulf Coast region. It operates a network of clinics, hospitals, and facilities offering virtual and in-person care across primary, emergency, cancer, cardiology, neurosciences, orthopedics, and women/children services. The system includes a Level II Trauma Center, Level III Neonatal ICU, and a nationally certified Primary Stroke Center, with advanced imaging and robotic-assisted surgery. Memorial is jointly owned by the City of Gulfport and Harrison County, licensed for 303 beds, and operates more than 95 physician clinics. Headquartered in Gulfport (address: 4500 13th St, Gulfport, MS 39501). For specific personnel or programs related to Bay Saint Louis, you may need to contact Memorial Health System directly.
Clinic Type
Pulmonology
Address
Memorial Pulmonary Clinic – Interventional Pulmonary/Critical Care 1340 Broad Avenue, Suite 300, Gulfport, MS 39501; Memorial Hospital Gulfport 4500 13th Street Gulfport, MS 39501; Memorial Hospital Biloxi 150 Reynoir Street Biloxi, MS 39530; Pulmonology Suite 306 147 Reynoir Street, Suite 306, Biloxi, MS
Phone
(228) 575-1775
hzelenka@mhg.com
Opening Hours
Not published — contact the clinic to confirm hours.
Telehealth
Available (telehealth/virtual visits mentioned)
Services Offered
Team
Insurance & Payment
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Languages Spoken
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Social Media
Photos



What Patients Say
Overall sentiment across review platforms: mixed
- Healthgrades: 3.4 out of 5 stars (5 ratings)
- WebMD: 4.0 out of 5 stars (aggregated) (5 ratings (with 2 written reviews))
- US News & World Report: 4 out of 5 stars (6 reviews)
- Healthline (FindCare): 5.0 out of 5 stars (1 rating)
Patients praise
- Some patients report that she is knowledgeable, efficient, and kind
- Instances of thorough investigation into health problems and providing dedicated care reported by some patients
Common complaints
- Reports of poor communication, including lack of follow-up after procedures and inability to get explanations for test results
- Concerns regarding lack of attentiveness or dismissing patient symptoms/concerns
- Issues with scheduling and long wait times for appointments and procedures
"Because of her not listening when I told her I was having trouble breathing, she missed I had lower lobe pneumonia."
— WebMD user review"Dr Allen is the first Dr to finally properly investigate my sister's health problems. She is going above and beyond any other Dr. I am very grateful!!"
— Healthgrades user reviewSynthesized from public review platforms as of Jul 11, 2026 — sources: [1][2][3][4].
In the News
- [PDF] Memorial Medical Staff Members — Apr 9, 2026
- [PDF] Memorial Medical Staff Members — Sep 12, 2025
- These standout physicians embody the very best of Coast care — Sep 30, 2025
- [XLS] Sheet1 - Mississippi Medicaid — Feb 23, 2026
- Memorial Welcomes New Medical Residents at 2026 White Coat Ceremony - Memorial Health System — Jun 22, 2026
Information sourced from the clinic's website as of July 11, 2026.
More pulmonology clinics in Bay Saint Louis
Summary: - Mercy is a U.S.-based nonprofit Catholic health system founded in 1871, with a large footprint in the Midwest (headquartered near St. Louis, Missouri) and operations including acute care hospitals, physician clinics, and outpatient services. - The organization comprises 40+ hospitals (per the highlights) and more than 12,000–40,000+ employees depending on the cited figures, plus thousands of physicians. - Location note: Mercy’s organizational base is Chesterfield, Missouri, and it operates across multiple states (including Arkansas, Kansas, Missouri, Oklahoma). It is one of the larger Catholic health systems in the United States. What this means for “Mercy Pulmonology - St. Louis Medical Tower A Bay Saint Louis”: - Mercy Pulmonology likely refers to Mercy’s pulmonary specialty services within the St. Louis area, potentially at a Mercy Medical Tower location in St. Louis, MO. - If you’re seeking Pulmonology care in that facility, you can expect Mercy’s network to provide respiratory medicine services, imaging, and related respiratory care within its Missouri footprint. If you need, I can tailor this to confirm the exact address, services, and hours for Mercy Pulmonology at St. Louis Medical Tower A.
Bay St. Louis Clinic at Coastal Family Health Center (CFHC) is part of CFHC’s network of primary care facilities serving residents of all ages and backgrounds along the Mississippi Gulf Coast. CFHC provides comprehensive, patient-centered care across 14 clinics and 33 school-based sites, plus dental, behavioral health, social services, translation, and more. The Bay St. Louis location offers CFHC’s full spectrum of services through a community-focused nonprofit with 21 U.S. offices (HQ in Gulfport). For Bay St. Louis residents, it’s a local CFHC clinic option for primary care, with access to CFHC’s broad health and support services.
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