John Mercer, MD
NPI 1205988540 · Obstetrics & Gynecology Physician · Nampa, ID
Enrolled with Medicare as Practitioner - Obstetrics/Gynecology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Mercer, MD is a Obstetrics & Gynecology Physician provider in Nampa, ID (NPI 1205988540).
Provider details
- NPI number
- 1205988540
- Entity type
- Individual
- Primary specialty
- Obstetrics & Gynecology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- L023779 (LA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
19 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
3 documented practice locations
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$105 across 2 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (2)
- 715 S 3rd StMontrose, CO 81401-4209Phone: (970) 249-6737Fax: (970) 252-0112
- 900 S 4th StMontrose, CO 81401-4226Phone: (970) 249-6737Fax: (970) 252-0112
Registry dates
- Enumerated
- 2007-01-17
- Last updated
- 2025-09-02
- Certified
- 2025-09-02
Frequently asked questions
- What is John Mercer's NPI number?
- John Mercer's National Provider Identifier (NPI) is 1205988540, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Mercer's specialty?
- John Mercer is listed in the NPPES registry with a primary specialty of Obstetrics & Gynecology Physician (Allopathic & Osteopathic Physicians).
- Where is John Mercer located?
- John Mercer's practice location on file with NPPES is 4424 E Flamingo Ave Ste 200, Nampa, ID 83687-9300.
- What is John Mercer's phone number?
- The practice phone number listed in the NPPES registry for John Mercer is (208) 302-1400.
- Does John Mercer accept Medicare?
- John Mercer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Mercer's NPI active?
- Yes — John Mercer's NPI (1205988540) is active in the NPPES registry as of the last update on 2025-09-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.