MAINLINE HEALTH SYSTEMS, INC
NPI 1669401501
Clinic/Center - Federally Qualified Health Center (FQHC) in Monticello, AR
About Mainline Health Systems, Inc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MAINLINE HEALTH SYSTEMS, INC (NPI 1669401501) is a healthcare organization registered as a federally qualified health center (fqhc) in Monticello, Arkansas and active in the NPI registry since July 2006. The organization lists Gary Allan Nichols, Ceo, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, revalidation and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Mainline Health Systems, Inc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Revalidation Due Date
Revalidation due by October 31, 2026
Medicare-enrolled providers and suppliers confirm their enrollment information with CMS on a set cycle, every 5 years for most and every 3 years for medical equipment suppliers. CMS sets the due date for each enrollment.
Clinicians Billing Medicare Through This Organization
63Medicare enrollment records show 63 clinicians reassign Medicare billing to Mainline Health Systems, Inc, which bills Medicare for the services they deliver. Of these, 10 practice within 10 miles. Listed here are the 20 practicing nearest to this location.
Clinicians by Medicare Specialty 8
Nearest to this location (20)
See all 63Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
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 Mainline Health Systems, Inc's NPI number?
The NPI number for Mainline Health Systems, Inc is 1669401501. It was assigned to this organization in the NPPES registry on July 2, 2006.
Where is Mainline Health Systems, Inc located?
Mainline Health Systems, Inc is located at 342 Highway 425 S, Monticello, AR 71655. The listed phone number is (870) 942-3000.
What is Mainline Health Systems, Inc's specialty?
The primary specialty registered for this NPI is Clinic/Center, specializing in Federally Qualified Health Center (FQHC), with taxonomy code 261QF0400X.
Is Mainline Health Systems, Inc enrolled in Medicare?
Yes. Mainline Health Systems, Inc is registered in the Medicare PECOS enrollment system.
When is Mainline Health Systems, Inc's Medicare revalidation due?
According to the CMS Revalidation Due Date List (October 2026 release), the Medicare Non-DME Part B enrollment for this organization (Arkansas, Clinic/Group Practice) is due for revalidation by October 31, 2026. Medicare providers and suppliers revalidate their enrollment every 5 years, and medical equipment suppliers every 3 years. Confirm current requirements with your Medicare Administrative Contractor.
How many clinicians bill Medicare through Mainline Health Systems, Inc?
According to the CMS Revalidation Reassignment List (October 2026 release), 63 clinicians in 8 Medicare specialties reassign their Medicare billing to Mainline Health Systems, Inc. A 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 the clinician's services. The largest specialties are Nurse Practitioner (36), Family Practice (9) and Clinical Social Worker (8). Of these, 10 practice within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
What insurance does Mainline Health Systems, Inc accept?
Health plans from Ambetter Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections, Ambetter from Superior HealthPlan and Ambetter of Oklahoma and 2 other insurers list Mainline Health Systems, Inc 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 Mainline Health Systems, Inc was last updated on March 20, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.
# Mainline Health Systems, Inc · NPI 1669401501
Federally Qualified Health Center (FQHC) organization in Monticello, Arkansas. Organization record, active in the CMS NPPES registry since July 2, 2006.
## Identity
- **NPI:** 1669401501 (Entity type: Organization)
- **Enumerated:** July 2, 2006
- **Primary specialty:** Clinic/Center - Federally Qualified Health Center (FQHC) · taxonomy 261QF0400X
- **Organization subpart:** No
- **Authorized official:** Gary Nichols, CEO
## Practice location
- **Address:** 342 HIGHWAY 425 S, Monticello, AR 71655-4612
- **Phone:** (870) 942-3000 · **Fax:** (870) 942-3005
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Medicare revalidation due:** October 31, 2026 (Non-DME Part B, Arkansas, Clinic/Group Practice) · CMS Revalidation Due Date List, October 2026 release
- **Clinicians billing through this organization:** 63 clinicians in 8 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Nurse Practitioner (36), Family Practice (9), Clinical Social Worker (8); 10 practice within 10 miles; [full list](https://npiprofile.com/npi/1669401501/clinicians) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** March 20, 2026
- **Other identifiers:** Medicaid 122649741 (AR)
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Source: [NPI Profile](https://npiprofile.com/npi/1669401501) · Data from the CMS NPPES public registry.