DR. MARK FELLOWS WEEMS M.D.
NPI 1477793362
Pediatrics - Neonatal-Perinatal Medicine in Memphis, TN
About Dr. Mark Fellows Weems M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MARK FELLOWS WEEMS M.D. (NPI 1477793362) is an individual neonatal-perinatal medicine provider in Memphis, Tennessee, licensed in Tennessee (50174) and active in the NPI registry since March 2009. He is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses 2
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 (PECOS)
Dr. Mark Fellows Weems M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Mark Weems reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Memphis, TN 38119
- Reassigned Medicare billing, Tennessee enrollment
- 157 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 12
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
MEMPHIS, TN 38103
MEMPHIS, TN 38103
MEMPHIS, TN 38103
MEMPHIS, TN 38103
MEMPHIS, TN 38103
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 Weems's NPI number?
The NPI number for Mark Weems is 1477793362. It was assigned to this individual provider in the NPPES registry on March 4, 2009.
Where is Mark Weems located?
Mark Weems practices at 853 Jefferson Ave Rout Bldg E201, Memphis, TN 38103. The listed phone number is (901) 448-5950.
What is Mark Weems's specialty?
The primary specialty registered for this NPI is Pediatrics, specializing in Neonatal-Perinatal Medicine, with taxonomy code 2080N0001X.
Is Mark Weems enrolled in Medicare?
Yes. Mark Weems is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Mark Weems's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mark Weems reassigns Medicare benefits to Ut Medical Group Inc (Memphis, TN). 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 Weems's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Mark Weems accept?
Health plans from BlueCross BlueShield of Tennessee, Cigna Healthcare and Molina Healthcare list Mark Weems 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 Mark Weems was last updated on February 25, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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 Fellows Weems, M.D. · NPI 1477793362
Neonatal-Perinatal Medicine physician in Memphis, Tennessee. Individual provider, active in the CMS NPPES registry since March 4, 2009.
## Identity
- **NPI:** 1477793362 (Entity type: Individual)
- **Enumerated:** March 4, 2009
- **Primary specialty:** Pediatrics - Neonatal-Perinatal Medicine · taxonomy 2080N0001X
- **State license:** 50174 (Tennessee)
- **Sole proprietor:** No
## Practice location
- **Address:** 853 JEFFERSON AVE, ROUT BLDG E201, Memphis, TN 38103-2807
- **Phone:** (901) 448-5950
## 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:** Ut Medical Group Inc (NPI 1780676650, Memphis, TN), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** February 25, 2025
- **Other identifiers:** Medicaid 04328790 (MS); Medicaid 198061001 (AR); Medicaid 1533405 (TN)
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Source: [NPI Profile](https://npiprofile.com/npi/1477793362) · Data from the CMS NPPES public registry.