MARK S LYELL MD
NPI 1407861776
Urology in Ocean Springs, MS
About Mark S Lyell Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARK S LYELL MD (NPI 1407861776) is an individual urology provider in Ocean Springs, Mississippi, licensed in Mississippi (13231) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS, is affiliated with Memorial Hospital At Gulfport, and maintains a secondary practice location in Mobile.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Other Identifiers 3
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
Mark S Lyell 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.
Medicare Billing Reassignment
Medicare enrollment records show Mark Lyell reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Mobile, AL 36607
- Reassigned Medicare billing, Alabama and Mississippi enrollments
- 59 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.
Areas of Expertise CMS Part B claims 27
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 3
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Memorial Hospital At Gulfport
Acute Care Hospitals · Gulfport, MSSinging River Health System
Acute Care Hospitals · Pascagoula, MSSinging River Gulfport
Acute Care Hospitals · Gulfport, MSPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 39564 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 5
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 Mark Lyell's NPI number?
The NPI number for Mark Lyell is 1407861776. It was assigned to this individual provider in the NPPES registry on July 29, 2006.
Where is Mark Lyell located?
Mark Lyell practices at 1153 Ocean Springs Rd, Ocean Springs, MS 39564. The listed phone number is (228) 819-8586.
What is Mark Lyell's specialty?
The primary specialty registered for this NPI is Urology with taxonomy code 208800000X.
Is Mark Lyell enrolled in Medicare?
Yes. Mark Lyell 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 Mark Lyell's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mark Lyell reassigns Medicare benefits to Urology Associates Of Mobile, P.A. (Mobile, AL). 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 Mark Lyell's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Mark Lyell accept?
Health plans from Ambetter Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections, Ambetter of Alabama and Ambetter of Tennessee and 2 other insurers list Mark Lyell 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.
Is Mark Lyell affiliated with any hospitals?
According to CMS data, Mark Lyell is affiliated with Memorial Hospital At Gulfport, Singing River Health System and Singing River Gulfport.
When was this NPI record last updated?
The NPPES record for Mark Lyell was last updated on May 22, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 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.