DR. JOHN WHITNEY MERCER JR. MD
NPI 1205988540
Obstetrics & Gynecology in Nampa, ID
About Dr. John Whitney Mercer Jr. Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JOHN WHITNEY MERCER JR. MD (NPI 1205988540) is an individual obstetrics & gynecology provider in Nampa, Idaho, licensed in Idaho (3971468) and active in the NPI registry since January 2007. He is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of Other (1997).
NPPES Registry Identity
Specialties & Licenses
An obstetrician/gynecologist possesses special knowledge, skills and professional capability in the medical and surgical care of the female reproductive system and associated disorders. This physician serves as a consultant to other physicians and as a primary physician for women.
Secondary Practice Locations 2
Other Identifiers 3
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. John Whitney Mercer Jr. Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 83687 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 3
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is John Mercer's NPI number?
The NPI number for John Mercer is 1205988540. It was assigned to this individual provider in the NPPES registry on January 17, 2007.
Where is John Mercer located?
John Mercer practices at 4424 E Flamingo Ave Ste 200, Nampa, ID 83687. The listed phone number is (208) 302-1400.
What is John Mercer's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.
Is John Mercer enrolled in Medicare?
Yes. John Mercer is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
What insurance does John Mercer accept?
Health plans from Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections, Ambetter from Magnolia Health, Ambetter from Superior HealthPlan and Blue Cross Blue Shield of Wyoming and 2 other insurers list John Mercer as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for John Mercer was last updated on September 2, 2025. NPI Profile syncs with the weekly NPPES data releases published by CMS.
