DR. WILLIAM MARK MOLPUS M.D.
NPI 1437189099
Radiology - Neuroradiology in Hattiesburg, MS
About Dr. William Mark Molpus M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. WILLIAM MARK MOLPUS M.D. (NPI 1437189099) is an individual neuroradiology provider in Hattiesburg, Mississippi, licensed in Mississippi (12221) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS, is affiliated with Wayne General Hospital, and maintains a secondary practice location in Centreville.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
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 and accepts Medicare assignment
Dr. William Mark Molpus M.d. 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 Reassignments
4Medicare enrollment records show William Molpus reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Hattiesburg, MS 39402
- Reassigned Medicare billing, Mississippi enrollment
- 27 clinicians in this Medicare group
Hattiesburg, MS 39402
- Reassigned Medicare billing, Mississippi enrollment
- 696 clinicians in this Medicare group
Bude, MS 39630
- Reassigned Medicare billing, Mississippi enrollment
- Also billed through NPI 1669705612 (Mississippi)
- 51 clinicians in this Medicare group
Gloster, MS 39638
- Reassigned Medicare billing, Mississippi enrollment
- Also billed through NPI 1770574048 (Mississippi)
- 56 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 76
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.
Wayne General Hospital
Acute Care Hospitals · Waynesboro, MSForrest General Hospital
Acute Care Hospitals · Hattiesburg, MSMerit Health Wesley
Acute Care Hospitals · Hattiesburg, MSHighland Community Hospital
Acute Care Hospitals · Picayune, MSWalthall County General Hospital Cah
Critical Access Hospitals · Tylertown, MSMedicare 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.
Reported Quality Measures
Other Providers at the Same Location NPPES 17
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
HATTIESBURG, MS 39402
HATTIESBURG, MS 39402
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 William Molpus's NPI number?
The NPI number for William Molpus is 1437189099. It was assigned to this individual provider in the NPPES registry on July 3, 2006.
Where is William Molpus located?
William Molpus practices at 5000 W 4th St, Hattiesburg, MS 39402. The listed phone number is (601) 450-0521.
What is William Molpus's specialty?
The primary specialty registered for this NPI is Radiology, specializing in Neuroradiology, with taxonomy code 2085N0700X.
Is William Molpus enrolled in Medicare?
Yes. William Molpus 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 organizations bill Medicare for William Molpus's services?
According to the CMS Revalidation Reassignment List (October 2026 release), William Molpus reassigns Medicare benefits to 4 organizations: Comprehensive Radiology Services, PLLC (Hattiesburg, MS), Hattiesburg Clinic PA (Hattiesburg, MS), Franklin County Memorial Hospital (Bude, MS) and Field Memorial Community Hospital (Gloster, MS). 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 William Molpus's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does William Molpus accept?
Health plans from Cigna Healthcare, Molina Healthcare and Oscar Health Plan, Inc. list William Molpus 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 William Molpus affiliated with any hospitals?
According to CMS data, William Molpus is affiliated with Wayne General Hospital, Forrest General Hospital, Merit Health Wesley, Highland Community Hospital and Walthall County General Hospital Cah.
When was this NPI record last updated?
The NPPES record for William Molpus was last updated on May 7, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.