Summary

Dr. John Mercer is a board-certified physician specializing in Obstetrics & Gynecology and Internal Medicine. He earned his medical degree from Louisiana State University School of Medicine in Shreveport and brings 29 years of clinical experience to his practice. His dual specialty training allows him to provide comprehensive care for women throughout their lives, from routine preventive care to pregnancy and childbirth.

Dr. Mercer practices across multiple locations in Idaho, Colorado, and Louisiana, with hospital affiliations including Saint Marys Regional Hospital, Montrose Regional Health, and Saint Alphonsus Medical Center Nampa. He specializes in managing pregnancy complications, including vaginal bleeding during pregnancy and antepartum depression. His procedural expertise includes vaginal childbirth and emergency obstetric care, and he also provides infusion clinic services. Patients consistently rate his care highly, giving him an average rating of 4.1 out of 5 stars.

Overview based on verified provider data

Quick Facts

  • accepting new patients
  • 4.1
  • 29 years of experience
  • Louisiana State University School Of Medicine In Shreveport
  • 10 written reviews
  • 2 specialties
  • 13 areas of expertise
  • 8 hospital affiliations
  • 7 office locations
  • Male

Patients’ Perspective

  • Gave an accurate diagnosis
  • Had a good bedside manner
  • Spent time with me

Office Locations

Dr. John Whitney Mercer has 7 locations

Community Hospital

2351 G RdGrand Junction, CO 81505

Montrose Regional Health

800 S 3rd StMontrose, CO 81401

Saint Marys Regional Hospital

2635 N 7th StGrand Junction, CO 81501

Willis Knighton South And Center For Womens Health

2510 Bert Kouns Industrial LoopShreveport, LA 71118

Saint Alphonsus Obgyn Clinic Nampa

4424 E Flamingo Ave Ste 200Nampa, ID 83687
Mon8:00 am - 5:00 pm
Tue8:00 am - 5:00 pm
Wed8:00 am - 5:00 pm
Thu8:00 am - 5:00 pm
Fri8:00 am - 5:00 pm
SatClosed
SunClosed

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Dr. John Whitney Mercer JR., MD
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Dr. John Whitney Mercer JR., MDAmy DunnDr. Gary Gregerson, MDDr. Nicole Lea Thurston, MD
Obstetrics & GynecologyObstetrics & GynecologyObstetrics & GynecologyPsychiatry
Accepts New Patients Accepts New Patients Accepts New Patients Accepts New Patients
4.1 
29 Years of Experience 5 Years of Experience 37 Years of Experience 23 Years of Experience
No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option
Speaks English Speaks English Speaks English, Spanish
Nampa , IDBoise , IDNampa , IDBoise , ID
Med School: Louisiana State University School Of Medicine In Shreveport Med School: Loma Linda University School Of Medicine Med School: Mcgovern Medical School At The Univ Of Texas Health Science Ctr At Houston
Current Profile
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Insurance Plans Accepted by Dr. John Whitney Mercer

Be sure to verify insurance information directly with your doctor's office, as it may undergo frequent changes.

Medical Specialties

Dr. John Whitney Mercer has the following 2 specialties

Specialty Expertise

Dr. John Whitney Mercer has the following 13 areas of expertise

  • Birth Control
  • C-section
  • Child Birth
  • Hot Flashes
  • Infertility
  • Internal Medicine
  • Menopause
  • Menstrual Pain
  • Minimally Invasive Surgical Procedures
  • Pap Smear
  • Pelvic Exam
  • Pregnancy
  • Women's Health

Certifications, License, & Education

29 Years Experience

Dr. John Whitney Mercer holds expired and active medical licenses in the states of Louisiana and Colorado.

Medical License

Medical Doctor with an expired medical license in the state of Louisiana that expired in 2026 and an active medical license in the state of Colorado that expires in 2027.

Education & Training

Medical School

Graduated from Louisiana State University School Of Medicine In Shreveport in 1997.

NPI Number

Dr. Mercer's NPI number is 1205988540.

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Frequently Asked Questions

Which hospitals is Dr. John Mercer affiliated with?
Dr. John Mercer is affiliated with Saint Marys Regional Hospital, Montrose Regional Health, Teton County Hospital District, Community Hospital, Saint Alphonsus Medical Center Nampa, Our Lady Of The Angels Hospital, Willis Knighton South And Center For Womens Health, and Minden Medical Center.
Where is Dr. John Mercer's office located?
Dr. John Mercer's office is located at 4300 E Flamingo Ave, Nampa, ID, 83687.
How can I make an appointment with Dr. John Mercer?
You can find contact information for Dr. John Mercer here on Vitals.
Does Dr. John Mercer accept my insurance?
You can see the insurance plans that Dr. John Mercer accepts on their Vitals profile.
Is Dr. John Mercer accepting new patients?
Dr. John Mercer is accepting new patients on Vitals. View Dr. John Mercer's profile on Vitals to make an appointment.

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