WILLIAM FRANCIS BARKER DO
NPI 1245868157
Internal Medicine in Springfield, MO
About William Francis Barker Do NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
WILLIAM FRANCIS BARKER DO (NPI 1245868157) is an individual internal medicine provider in Springfield, Missouri, licensed in Missouri (2023013570) and active in the NPI registry since March 2020. He is enrolled in Medicare PECOS, is affiliated with Cox Medical Centers, and is a graduate of Other (2020).
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 and accepts Medicare assignment
William Francis Barker Do 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 Reassignment
Medicare enrollment records show William Barker reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Springfield, MO 65807
- Reassigned Medicare billing, Missouri enrollment
- 109 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 5
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 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Cox Medical Centers
Acute Care Hospitals · Springfield, MOCitizens Memorial Hospital
Acute Care Hospitals · Bolivar, MOPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 65807 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 17
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SPRINGFIELD, MO 65807
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 Barker's NPI number?
The NPI number for William Barker is 1245868157. It was assigned to this individual provider in the NPPES registry on March 28, 2020.
Where is William Barker located?
William Barker practices at 3801 S National Ave Ste 1122, Springfield, MO 65807. The listed phone number is (417) 269-7728.
What is William Barker's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is William Barker enrolled in Medicare?
Yes. William Barker 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 organization bills Medicare for William Barker's services?
According to the CMS Revalidation Reassignment List (October 2026 release), William Barker reassigns Medicare benefits to Lester E Cox Medical Centers (Springfield, MO). 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 William Barker's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is William Barker affiliated with any hospitals?
According to CMS data, William Barker is affiliated with Cox Medical Centers and Citizens Memorial Hospital.
When was this NPI record last updated?
The NPPES record for William Barker was last updated on October 10, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.
# William Francis Barker, DO · NPI 1245868157
Internal Medicine physician in Springfield, Missouri. Individual provider, active in the CMS NPPES registry since March 28, 2020.
## Identity
- **NPI:** 1245868157 (Entity type: Individual)
- **Enumerated:** March 28, 2020
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 2023013570 (Missouri)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 3801 S NATIONAL AVE STE 1122, Springfield, MO 65807-6090
- **Phone:** (417) 269-7728 · **Fax:** (417) 269-7729
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Lester E Cox Medical Centers (NPI 1407210917, Springfield, MO), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2020
## Record status
- **NPPES last updated:** October 10, 2023
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Source: [NPI Profile](https://npiprofile.com/npi/1245868157) · Data from the CMS NPPES public registry.