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Dr. Rex Mahnensmith, MD

Nephrology & Hypertension*
5.0 (3)
Map Pin Small Southington, CT
Accepting new patients
47 years of experience

Offers telehealth

Overview of Dr. Rex Mahnensmith, MD

Dr. Rex Mahnensmith, MD is a Nephrology & Hypertension Specialist in Southington, CT. They specialize in Nephrology & Hypertension, has 47 years of experience, and is board certified in Internal Medicine. They graduated from Yale Medical School Cum Laude 1977 and is affiliated with Saint Mary's Hospital. Dr. Mahnensmith, completed a residency at Yale New Haven Hospital 1978-1981. Patients rated Dr. Mahnensmith an average 5.0 star rating.

Dr. Mahnensmith works at Rex L Mahnensmith, MD in Southington, CT with other offices in Waterbury, CT and Fairfield, CT. They frequently treat conditions like Urinary Tract Infection (UTI), Acute Upper Respiratory Infection and Fever along with other conditions at varying frequencies. They are accepting new patients and accept Aetna, Anthem and Blue Cross Blue Shield as well as other major insurance plans. Please call ahead to schedule an appointment and to confirm all accepted insurance plans.

These providers are on the medical staff of Hartford Healthcare
Compare with other Nephrology & Hypertension Specialists
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These providers are on the medical staff of Hartford Healthcare.

Dr. Mahnensmith's Office Locations

  1. 1
    Docs Medical Inc- Southington
    832 Queen St, Southington, CT 06489 Icon Directions Right Arrow Directions Phone Icon (860) 863-5288
    09:00 - 18:00
    09:00 - 18:00
    09:00 - 18:00
    09:00 - 18:00
    09:00 - 18:00
    09:00 - 18:00
    09:00 - 13:00
  2. 2
    Docs Medical Inc - Frost
    506 Frost Rd, Waterbury, CT 06705 Icon Directions Right Arrow Directions Phone Icon (203) 437-8368
  3. 3
    Fairfield Family Medical Care
    525 Tunxis Hill Cut Off, Fairfield, CT 06825 Icon Directions Right Arrow Directions Phone Icon (203) 870-1973
  4. 4
    Sunrise Medical Laboratories
    279 Chase Ave, Waterbury, CT 06704 Icon Directions Right Arrow Directions Phone Icon (203) 528-4993

Hospital Affiliations
Admitting Hospitals

Admitting hospitals are where the provider is credentialed to see patients, perform procedures, and send patients for continuous care.

  • Saint Mary's Hospital

Experience & Treatment Frequency


What is treatment frequency?

Our treatment frequency feature helps you understand howoften a provider performs or treats a specificprocedure/condition compared to other doctors. Providersrank in one of four frequency categories:

Very HighFrequency
May Perform

Specific procedures/conditions that don’t haveenough data are indicated with “May Perform”. We encourageyou to contact the provider with questions about theirexperience.

Search for conditions or procedures.
Urinary Tract Infection (UTI)
Acute Upper Respiratory Infection

Treatment frequency

Many providers have expertise treating multiple conditions or procedures. FindCare uses a variety of data sources to determine which conditions or procedures a provider treats and their level of experience.
Urinary Tract Infection (UTI)
Acute Upper Respiratory Infection
  • View other providers who treat Fever
  • View other providers who treat Thrush
All Headaches (incl. Migraine)
Bruise of Face, Scalp, or Neck
Diabetes With Renal Manifestations
Joint Pain
Limb Pain
  • View other providers who treat Nausea
Vitamin D Deficiency
Arterial Blood Gas Test (ABG)
Electrocardiogram (EKG)
Abdominal Pain
Abnormal Thyroid
  • View other providers who treat Acidosis
Acute Bronchitis
Acute Glomerulonephritis
Acute Gout
Acute Kidney Failure
Acute Kidney Infection
Acute Pharyngitis
Acute Sinusitis
Administrative Physical
Adrenal Gland Diseases
Adrenal Insufficiency
Allergic Rhinitis
  • View other providers who treat Anemia
Animal Allergies
  • View other providers who treat Anxiety
Arthritis of the Ankle
Arthritis of the Finger
Arthritis of the Foot
Arthritis of the Hand
Arthritis of the Midfoot
Arthritis of the Neck
Arthritis of the Shoulder
Arthritis of the Spine
Arthritis of the Toe
Arthritis of the Wrist
  • View other providers who treat Asthma
Asymptomatic Post-Menopausal Status
Athlete's Foot
Atopic Dermatitis (Eczema)
Back Pain
Benign Chronic Pain Syndrome
Blood in Urine (Hematuria)
Bone Disorders
Calcium Metabolism Disorders
  • View other providers who treat Cancer
Carotid Atherosclerosis
Chest Pain
Chest Wall Pain Syndrome
Chronic Anemia
Chronic Fatigue Syndrome
Chronic Glomerulonephritis
Chronic Kidney Diseases
Chronic Neck Pain
Chronic Pain
Chronic Sinusitis
Common Cold
Congenital Cystic Kidney Disease
Congenital Polycystic Kidney Disease
Congenital Renal Agenesis and Dysgenesis
COPD (Chronic Obstructive Pulmonary Disease)
Coronary Artery Disease (CAD)
Coronary Atherosclerosis
  • View other providers who treat Cough
Crystal Arthropathy
Crystalline Arthritis
Deficiency-Induced Osteoporosis
  • View other providers who treat Diabetes
Diabetes Insipidus
Diabetes Type 1
Diabetes Type 2
Diabetic Ketoacidosis
Diabetic Polyneuropathy
Diabetic Retinopathy
Difficulty With Walking
Disuse Osteoporosis
Drug-Induced Osteoporosis
Ear Ache
  • View other providers who treat Ear Ache
Earwax Buildup
Eczema and Contact Dermatitis
End-Stage Renal Disease
Enlarged Prostate (BPH)
Familial Combined Hyperlipidemia
Familial Hypercholesterolemia
Gait Abnormality
Gas-Bloat Syndrome
Gastroesophageal Reflux Disease (GERD)
  • View other providers who treat Goiter
  • View other providers who treat Gout
  • View other providers who treat Headache
Heart Disease
Heart Palpitations
Hepatorenal Syndrome
  • View other providers who treat Hernia
Herpes Zoster Without Complication
High Cholesterol
Hypercholesterolemia, Autosomal Dominant
Hypercholesterolemia, Autosomal Recessive
Hypertensive Chronic Kidney Disease
Hypertensive Heart and Chronic Kidney Disease
Hypertensive Heart Disease
Hyposmolality and Hyponatremia
Hypotension (Excluding Maternal)
Idiopathic Osteoporosis
  • View other providers who treat Insomnia
Intestinal Diverticulitis
Intestinal Diverticulosis
Iron Deficiency Anemia
Irritable Bowel Syndrome
Jock Itch
Kidney Disease
Kidney Infection
Kidney Stones
Limb Swelling Caused by Fluid Overload
Lipid Disorders
Loss of Voice or Hoarse Voice
Low Back Pain
Lyme Disease
Magnesium Metabolism Disorders
Malaise and Fatigue
Menopausal and Postmenopausal Disorders
Menstrual Disorders
  • View other providers who treat Migraine
Mineral Metabolism Disorders
Moles (Benign Skin Lesions)
Muscle Spasm
Muscle Weakness
Nail and Nail Bed Infection
Nephritis and Nephropathy
Nephrogenic Diabetes Insipidus
Nephrotic Syndrome
Noninfectious Gastroenteritis and Colitis
Nutritional Anemia
  • View other providers who treat Obesity
Osteoarthritis of Hand
Osteoarthritis of Hand or Wrist
Osteoarthritis of Hip
Osteoarthritis of Hip and Thigh
Osteoarthritis of Knee
Osteoarthritis of Spine
Otitis Media
Outer Ear Infection
Painful Urination (Dysuria)
Peptic Ulcer
Pernicious Anemia
Phosphorus Metabolism Disorders
Pinkeye (Conjunctivitis)
Pollen Allergy
  • View other providers who treat Polyuria
Postmenopausal Osteoporosis
Postnasal Drip
Potassium Deficiency
Primary Hyperparathyroidism
Primary Osteoporosis
Reflux Esophagitis
Renal Artery Arteriosclerotic Disease
Renal Hyperparathyroidism
Renal Osteodystrophy
Restless Leg Syndrome
Retina Diseases
  • View other providers who treat Ringworm
Runner's Knee
Sciatica (Not Due to Disc Displacement)
Secondary Diabetes Mellitus
Secondary Hyperparathyroidism
Secondary Osteoporosis
Secondary Renovascular Hypertension
Senile Osteoporosis
  • View other providers who treat Shingles
Shortness of Breath
Sleep Apnea
Sleep-Related Leg Cramp
Sprains and Strains (incl. Muscle Tear)
Swimmer's Ear
Symptomatic Menopause
Throat Pain
Thyroid Cyst
Thyroid Disease
Tobacco Use Disorder
Transient Osteoporosis of Hip
Urinary Incontinence
Venous Insufficiency
  • View other providers who treat Vertigo
Wegener's Granulomatosis
  • View other providers who treat Wheezing
Abdominal Paracentesis
Abscess Incision and Drainage
Arteriovenostomy for Renal Dialysis
Cardiovascular Disease Counseling
Chronic Care Management
Injection of Tendon
Injection Therapy
Joint Injection
Kidney Stones Treatment
Percutaneous Biopsy of Autologous Kidney
Peritoneal Dialysis
Physical Examination
Renal Biopsy
Sacroiliac Joint Injection
Sexually Transmitted Infections Counseling
Wellness Examination
Check your insurance
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    View All Accepted Carriers

    • Aetna
    • Anthem
    • Blue Cross and Blue Shield of Louisiana
    • Blue Cross and Blue Shield of Massachusetts
    • Blue Cross Blue Shield
    • CareFirst Blue Cross Blue Shield
    • Cigna
    • Connecticare
    • EmblemHealth
    • Excellus BlueCross BlueShield
    • First Health
    • Harvard Pilgrim Health Care
    • Highmark Blue Cross Blue Shield
    • Medicaid
    • MVP Health Care
    • Oxford Health Plans
    • UnitedHealthCare
    • We accept all PPO insurances and Medicare, please inquire with the office.

    * Please verify this information when scheduling an appointment.

    Ratings & Reviews
    Reviews are displayed in date order and collected from patients who have agreed to reporting accurate and fair reviews. Providers with no reviews may have a new FindCare profile, or no submitted reviews on FindCare yet.

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    Average provider rating
    Based on 3 ratings
    Patient Ratings (3)
    5 Star
    4 Star
    3 Star
    2 Star
    1 Star
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    Photo: Dr. Rex Mahnensmith, MD
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    Dr. Mahnensmith's Office & Staff

    • Ease of scheduling urgent appointments
    • Office environment, cleanliness, comfort, etc.
    • Staff friendliness and courteousness
    • Total wait time (waiting & exam rooms)

    Experience with Dr. Mahnensmith

    • Level of trust in provider's decisions
    • How well provider explains medical condition(s)
    • How well provider listens and answers questions
    • Hpends appropriate amount of time with patients

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    About Dr. Rex Mahnensmith, MD

    • Nephrology & Hypertension

    • *Healthline does not verify qualifications for medical specialties. Please verify your provider's specialty and qualifications directly with your provider and applicable medical board.
    Years of Experience
    • 47 years of experience
    Years of Experience
    Years of experience represents how long a provider has been practicing in their field since graduating from medical school. Not all providers will have this information available.

    Languages Spoken
    • English
    Languages Spoken
    NPI Number
    • 1760466528
    NPI Number
    A National Provider Identifier (NPI) is a unique 10-digit identifier issued by the government to healthcare providers.

    Education & Certifications

    • Yale School of Medicine
    • Yale New Haven Hospital 1978-1981
    Medical Education
    • Yale Medical School Cum Laude 1977
    Medical Education
    Board Certifications
    • Internal Medicine and Nephrology
    Board Certifications
    What’s a board certification and why is it important that my provider has one?

    A board certification represents a provider’s dedication to ongoing training in one or more specialties, including the completion of intensive exams. While not all specialties have board certifications, if your provider does have one they’ve taken the extra step to master their specialty and to keep up with the latest advancements in their field.

    Frequently Asked Questions

    Dr. Rex Mahnensmith, MD is accepting new patients on Healthline FindCare. You can check to see if Dr. Mahnensmith is offering online scheduling or call the provider’s office for more information.

    Dr. Mahnensmith has indicated that they do offer telehealth services. Please call the provider’s office at for more information.

    Dr. Mahnensmith has seen patients for Urinary Tract Infection (UTI), Acute Upper Respiratory Infection and Fever, and more. You can see other conditions treated by Dr. Mahnensmith on their profile. Please call the provider’s office to confirm all visit reasons.

    3 patients have reviewed Dr. Mahnensmith. The overall rating for this provider is 5.0. You can read verified reviews and ratings and leave your own review based on your experience with Dr. Mahnensmith.

    Whether a person prefers to schedule an appointment online or over the phone with Dr. Mahnensmith, there are benefits to both methods. A person calling to schedule an with Dr. Mahnensmith appointment can ask questions about the practice, provider availability, conditions treated, procedures performed, and if their insurance carrier is accepted. While online scheduling is quicker, easier, allows one to view a wide range of appointment times, and may provide the ability to sync with a personal calendar.

    Telehealth Options
    This provider has not specified a telehealth appointment method. Would you still like to make an appointment with Dr. Mahnensmith, or would you like to choose another provider and have an online appointment right now?
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    (860) 863-5288

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