DR. ROBERT H WILLIAMS M.D.
NPI 1386631992
Internal Medicine - Nephrology in Cullman, AL
About Dr. Robert H Williams M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. ROBERT H WILLIAMS M.D. (NPI 1386631992) is an individual nephrology provider in Cullman, Alabama, licensed in Alabama (6223) and active in the NPI registry since September 2005. 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. Robert H Williams M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
10Medicare enrollment records show Robert Williams reassigns Medicare billing to 10 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Birmingham, AL 35205
- Reassigned Medicare billing, Alabama enrollment
- 646 clinicians in this Medicare group
Gadsden, AL 35901
- Reassigned Medicare billing, Alabama enrollment
- 112 clinicians in this Medicare group
Birmingham, AL 35243
- Reassigned Medicare billing, Alabama enrollment
- 215 clinicians in this Medicare group
Killen, AL 35645
- Reassigned Medicare billing, Alabama enrollment
- 209 clinicians in this Medicare group
Fayette, AL 35555
- Reassigned Medicare billing, Alabama enrollment
- 78 clinicians in this Medicare group
Florence, AL 35630
- Reassigned Medicare billing, Alabama enrollment
- 59 clinicians in this Medicare group
Centre, AL 35960
- Reassigned Medicare billing, Alabama enrollment
- 50 clinicians in this Medicare group
Centre, AL 35960
- Reassigned Medicare billing, Alabama enrollment
- 43 clinicians in this Medicare group
Northport, AL 35476
- Reassigned Medicare billing, Alabama enrollment
- 118 clinicians in this Medicare group
Covington, LA 70433
- Reassigned Medicare billing, Alabama enrollment
- 152 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 35055 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 16
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
CULLMAN, AL 35055
CULLMAN, AL 35055
CULLMAN, AL 35055
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 Robert Williams's NPI number?
The NPI number for Robert Williams is 1386631992. It was assigned to this individual provider in the NPPES registry on September 29, 2005.
Where is Robert Williams located?
Robert Williams practices at 1910 Cherokee Ave SW, Cullman, AL 35055. The listed phone number is (256) 739-3500.
What is Robert Williams's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.
Is Robert Williams enrolled in Medicare?
Yes. Robert Williams is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Robert Williams's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Robert Williams reassigns Medicare benefits to 10 organizations: Paragon Contracting Services LLC (Birmingham, AL), Alabama Emergency Physician Partners, LLC (Gadsden, AL), Oak Mountain Group Services, LLC (Birmingham, AL), Ecm Health Group LLC (Killen, AL), Relias Emergency Medicine Specialists Of Fayette, LLC (Fayette, AL) and 5 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 Robert Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Robert Williams accept?
Health plans from Oscar Insurance Company list Robert Williams 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 Robert Williams was last updated on August 15, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 years 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. Robert H Williams, M.D. · NPI 1386631992
Nephrology physician in Cullman, Alabama. Individual provider, active in the CMS NPPES registry since September 29, 2005.
## Identity
- **NPI:** 1386631992 (Entity type: Individual)
- **Enumerated:** September 29, 2005
- **Primary specialty:** Internal Medicine - Nephrology · taxonomy 207RN0300X
- **State license:** 6223 (Alabama)
- **Sole proprietor:** No
## Practice location
- **Address:** 1910 CHEROKEE AVE SW, Cullman, AL 35055
- **Phone:** (256) 739-3500 · **Fax:** (256) 775-6119
## 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:** 10 organizations under Medicare reassignment (form CMS-855R): Paragon Contracting Services LLC (NPI 1225071459, Birmingham, AL); Alabama Emergency Physician Partners, LLC (NPI 1891031894, Gadsden, AL); Oak Mountain Group Services, LLC (NPI 1366840761, Birmingham, AL); Ecm Health Group LLC (NPI 1811516925, Killen, AL); Relias Emergency Medicine Specialists Of Fayette, LLC (NPI 1093201543, Fayette, AL); and 5 more · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** August 15, 2013
- **Other identifiers:** Medicaid 000007372 (AL); Medicare UPIN C76970 (AL); Medicare PIN 000007372 (AL)
---
Source: [NPI Profile](https://npiprofile.com/npi/1386631992) · Data from the CMS NPPES public registry.