MARIO A AGUILAR
NPI 1457959702
Counselor - Professional in Saint Louis, MO
About Mario A Aguilar NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARIO A AGUILAR (NPI 1457959702) is an individual professional provider in Saint Louis, Missouri, licensed in Missouri (2019031708) and active in the NPI registry since October 2020. He is enrolled in Medicare PECOS and is a graduate of Other (2018).
NPPES Registry Identity
Specialties & Licenses 2
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Mario A Aguilar 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.
Medicare Billing Reassignment
Medicare enrollment records show Mario Aguilar reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Saint Charles, MO 63301
- Reassigned Medicare billing, Missouri enrollment
- 36 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Other Providers at the Same Location NPPES 20
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 Mario Aguilar's NPI number?
The NPI number for Mario Aguilar is 1457959702. It was assigned to this individual provider in the NPPES registry on October 9, 2020.
Where is Mario Aguilar located?
Mario Aguilar practices at 4066 Dunnica Ave, Saint Louis, MO 63116. The listed phone number is (636) 224-1700.
What is Mario Aguilar's specialty?
The primary specialty registered for this NPI is Counselor, specializing in Professional, with taxonomy code 101YP2500X.
Is Mario Aguilar enrolled in Medicare?
Yes. Mario Aguilar 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.
Which organization bills Medicare for Mario Aguilar's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mario Aguilar reassigns Medicare benefits to A W Stevenson LLC (Saint Charles, MO). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Mario Aguilar's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Mario Aguilar accept?
Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from Arkansas Health & Wellness, Ambetter from Sunflower Health Plan and Ambetter of Oklahoma and 5 other insurers list Mario Aguilar 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 Mario Aguilar was last updated on January 14, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Mario A Aguilar · NPI 1457959702
Professional provider in Saint Louis, Missouri. Individual provider, active in the CMS NPPES registry since October 9, 2020.
## Identity
- **NPI:** 1457959702 (Entity type: Individual)
- **Enumerated:** October 9, 2020
- **Primary specialty:** Counselor - Professional · taxonomy 101YP2500X
- **State license:** 2019031708 (Missouri)
- **Sole proprietor:** No
## Practice location
- **Address:** 4066 DUNNICA AVE, Saint Louis, MO 63116-3510
- **Phone:** (636) 224-1700
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment
- **Bills Medicare through:** A W Stevenson LLC (NPI 1396469060, Saint Charles, MO), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2018
## Record status
- **NPPES last updated:** January 14, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1457959702) · Data from the CMS NPPES public registry.