DR. MARK J MAHAN MD
NPI 1609863778
Radiology - Diagnostic Radiology in Orlando, FL
About Dr. Mark J Mahan Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MARK J MAHAN MD (NPI 1609863778) is an individual diagnostic radiology provider in Orlando, Florida, licensed in Florida (ME 57707) and active in the NPI registry since October 2005. He is enrolled in Medicare PECOS, is affiliated with Ascension St Mary's Hospital, and is a graduate of University Of Chicago, Pritzker School Of Medicine (1985).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dr. Mark J Mahan Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
36Medicare enrollment records show Mark Mahan reassigns Medicare billing to 36 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Tampa, FL 33606
- Reassigned Medicare billing, Colorado and Florida enrollments
- 27 clinicians in this Medicare group
Atlanta, GA 30342
- Reassigned Medicare billing, Colorado, Florida and Georgia enrollments
- 22 clinicians in this Medicare group
New Bern, NC 28562
- Reassigned Medicare billing, Colorado and Florida enrollments
- 16 clinicians in this Medicare group
Greensboro, NC 27401
- Reassigned Medicare billing, Colorado enrollment
- 19 clinicians in this Medicare group
Murfreesboro, TN 37129
- Reassigned Medicare billing, Colorado and Florida enrollments
- 6 clinicians in this Medicare group
Whitesburg, KY 41858
- Reassigned Medicare billing, Kentucky, Colorado and Florida enrollments
- Also billed through NPI 1851178735 (Colorado), NPI 1245017144 (Florida)
- 579 clinicians in this Medicare group
Nashville, TN 37203
- Reassigned Medicare billing, Colorado, Florida and Pennsylvania enrollments
- 24 clinicians in this Medicare group
Alexandria, LA 71301
- Reassigned Medicare billing, Colorado and Florida enrollments
- 14 clinicians in this Medicare group
Owensboro, KY 42303
- Reassigned Medicare billing, Colorado, Florida and Kentucky enrollments
- 11 clinicians in this Medicare group
Columbus, OH 43215
- Reassigned Medicare billing, Florida enrollment
- 43 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 5
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Ascension St Mary's Hospital
Acute Care Hospitals · Saginaw, MILovelace Medical Center
Acute Care Hospitals · Albuquerque, NMDeaconess Medical Center
Acute Care Hospitals · Spokane, WAMulticare Valley Hospital
Acute Care Hospitals · Spokane, WACapital Medical Center
Acute Care Hospitals · Olympia, WAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 32806 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 15
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 Mahan's NPI number?
The NPI number for Mark Mahan is 1609863778. It was assigned to this individual provider in the NPPES registry on October 4, 2005.
Where is Mark Mahan located?
Mark Mahan practices at 20 W Kaley St, Orlando, FL 32806. The listed phone number is (407) 423-2581.
What is Mark Mahan's specialty?
The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.
Is Mark Mahan enrolled in Medicare?
Yes. Mark Mahan is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Mark Mahan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mark Mahan reassigns Medicare benefits to 36 organizations: Mori Bean And Brooks Inc (Tampa, FL), Northside Radiology Associates LLC (Atlanta, GA), Coastal Radiology Associates, PLLC (New Bern, NC), Greensboro Radiology, PA (Greensboro, NC), Murfreesboro Radiology & Nuclear Medicine Consultants PLLC (Murfreesboro, TN) and 31 more organizations, listed in the Medicare section above. Each 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 Mahan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Mark Mahan accept?
Health plans from Blue Care Network of Michigan, Blue Cross Blue Shield of Arizona, Blue Cross and Blue Shield of Texas, CareSource and CareSource (Common Ground Healthcare) and 8 other insurers list Mark Mahan 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 Mahan affiliated with any hospitals?
According to CMS data, Mark Mahan is affiliated with Ascension St Mary's Hospital, Lovelace Medical Center, Deaconess Medical Center, Multicare Valley Hospital and Capital Medical Center.
When was this NPI record last updated?
The NPPES record for Mark Mahan was last updated on February 26, 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.
# Dr. Mark J Mahan, MD · NPI 1609863778
Diagnostic Radiology physician in Orlando, Florida. Individual provider, active in the CMS NPPES registry since October 4, 2005.
## Identity
- **NPI:** 1609863778 (Entity type: Individual)
- **Enumerated:** October 4, 2005
- **Primary specialty:** Radiology - Diagnostic Radiology · taxonomy 2085R0202X
- **State license:** ME 57707 (Florida)
- **Sole proprietor:** No
## Practice location
- **Address:** 20 W KALEY ST, Orlando, FL 32806-2931
- **Phone:** (407) 423-2581 · **Fax:** (407) 849-6470
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 36 organizations under Medicare reassignment (form CMS-855R): Mori Bean And Brooks Inc (NPI 1093782070, Tampa, FL); Northside Radiology Associates LLC (NPI 1013960657, Atlanta, GA); Coastal Radiology Associates, PLLC (NPI 1144270307, New Bern, NC); Greensboro Radiology, PA (NPI 1821035999, Greensboro, NC); Murfreesboro Radiology & Nuclear Medicine Consultants PLLC (NPI 1316043524, Murfreesboro, TN); and 31 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Chicago, Pritzker School Of Medicine, class of 1985
## Record status
- **NPPES last updated:** February 26, 2026
- **Other identifiers:** Medicaid 64454400 (FL)
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Source: [NPI Profile](https://npiprofile.com/npi/1609863778) · Data from the CMS NPPES public registry.