DR. WALKER PORTERFIELD DC
NPI 1336884717
Chiropractor in Johnston, IA
About Dr. Walker Porterfield Dc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. WALKER PORTERFIELD DC (NPI 1336884717) is an individual chiropractor in Johnston, Iowa, licensed in Iowa (109680) and active in the NPI registry since May 2022.
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dr. Walker Porterfield Dc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Walker Porterfield reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Johnston, IA 50131
- Reassigned Medicare billing, Iowa enrollment
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 2
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 Walker Porterfield's NPI number?
The NPI number for Walker Porterfield is 1336884717. It was assigned to this individual provider in the NPPES registry on May 1, 2022.
Where is Walker Porterfield located?
Walker Porterfield practices at 5525 Merle Hay Rd Ste 165, Johnston, IA 50131. The listed phone number is (515) 212-5715.
What is Walker Porterfield's specialty?
The primary specialty registered for this NPI is Chiropractor with taxonomy code 111N00000X.
Is Walker Porterfield enrolled in Medicare?
Yes. Walker Porterfield is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Walker Porterfield's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Walker Porterfield reassigns Medicare benefits to Clarity Chiropractic LLC (Johnston, IA). 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 Walker Porterfield's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Walker Porterfield was last updated on June 21, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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. Walker Porterfield, DC · NPI 1336884717
Chiropractor provider in Johnston, Iowa. Individual provider, active in the CMS NPPES registry since May 1, 2022.
## Identity
- **NPI:** 1336884717 (Entity type: Individual)
- **Enumerated:** May 1, 2022
- **Primary specialty:** Chiropractor · taxonomy 111N00000X
- **State license:** 109680 (Iowa)
- **Sole proprietor:** No
## Practice location
- **Address:** 5525 MERLE HAY RD STE 165, Johnston, IA 50131-1446
- **Phone:** (515) 212-5715
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Bills Medicare through:** Clarity Chiropractic LLC (NPI 1679218903, Johnston, IA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** June 21, 2022
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Source: [NPI Profile](https://npiprofile.com/npi/1336884717) · Data from the CMS NPPES public registry.