John Merlo, MD
NPI 1811646524 · Student in an Organized Health Care Education/Training Program · Saint Louis, MO
Enrolled with Medicare as Order and Referring Only - Anesthesiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Merlo, MD is a Student in an Organized Health Care Education/Training Program provider in Saint Louis, MO (NPI 1811646524).
Provider details
- NPI number
- 1811646524
- Entity type
- Individual
- Primary specialty
- Student in an Organized Health Care Education/Training ProgramStudent, Health Care
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
4 yrs in NPPES registry
- Profile completeness33% of score
83% of core fields populated
- Practice footprint20% of score
1 documented practice location
- 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.
$21 across 1 record (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
Registry dates
- Enumerated
- 2022-03-21
- Last updated
- 2022-03-21
- Certified
- 2022-03-21
Frequently asked questions
- What is John Merlo's NPI number?
- John Merlo's National Provider Identifier (NPI) is 1811646524, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Merlo's specialty?
- John Merlo is listed in the NPPES registry with a primary specialty of Student in an Organized Health Care Education/Training Program (Student, Health Care).
- Where is John Merlo located?
- John Merlo's practice location on file with NPPES is 1402 S Grand Blvd # M260, Saint Louis, MO 63104-1004.
- What is John Merlo's phone number?
- The practice phone number listed in the NPPES registry for John Merlo is (314) 977-5700.
- Does John Merlo accept Medicare?
- John Merlo is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Merlo's NPI active?
- Yes — John Merlo's NPI (1811646524) is active in the NPPES registry as of the last update on 2022-03-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.