WALLACE LOCK M.D.
NPI 1437545761
Emergency Medicine in Fort Smith, AR
About Wallace Lock M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
WALLACE LOCK M.D. (NPI 1437545761) is an individual emergency medicine provider in Fort Smith, Arkansas, licensed in Tennessee (67669) and active in the NPI registry since April 2015. He is enrolled in Medicare PECOS, is affiliated with Baptist Memorial Hospital Desoto, and is a graduate of University Of Arkansas College Of Medicine (2015).
NPPES Registry Identity
Specialties & Licenses 2
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
Wallace Lock 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
18Medicare enrollment records show Wallace Lock reassigns Medicare billing to 18 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Fort Smith, AR 72903
- Reassigned Medicare billing, Arkansas enrollment
- 658 clinicians in this Medicare group
Mansfield, AR 72944
- Reassigned Medicare billing, Arkansas enrollment
- Also billed through NPI 1912978875 (Arkansas)
- 137 clinicians in this Medicare group
Booneville, AR 72927
- Reassigned Medicare billing, Arkansas enrollment
- Also billed through NPI 1992133714 (Arkansas)
- 146 clinicians in this Medicare group
Ozark, AR 72949
- Reassigned Medicare billing, Arkansas enrollment
- 147 clinicians in this Medicare group
Paris, AR 72855
- Reassigned Medicare billing, Arkansas enrollment
- Also billed through NPI 1760453633 (Arkansas), NPI 1912955709 (Arkansas)
- 159 clinicians in this Medicare group
Clarksville, AR 72830
- Reassigned Medicare billing, Arkansas enrollment
- 102 clinicians in this Medicare group
Hope, AR 71801
- Reassigned Medicare billing, Arkansas enrollment
- 323 clinicians in this Medicare group
Fordyce, AR 71742
- Reassigned Medicare billing, Arkansas enrollment
- 125 clinicians in this Medicare group
Fordyce, AR 71742
- Reassigned Medicare billing, Arkansas enrollment
- 121 clinicians in this Medicare group
Memphis, TN 38104
- Reassigned Medicare billing, Tennessee enrollment
- 253 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 3
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.
Baptist Memorial Hospital Desoto
Acute Care Hospitals · Southaven, MSMethodist Healthcare - Olive Branch Hospital
Acute Care Hospitals · Olive Branch, MSPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 72901 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 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
FORT SMITH, AR 72901
FORT SMITH, AR 72901
FORT SMITH, AR 72901
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 Wallace Lock's NPI number?
The NPI number for Wallace Lock is 1437545761. It was assigned to this individual provider in the NPPES registry on April 14, 2015.
Where is Wallace Lock located?
Wallace Lock practices at 612 S 12th St, Fort Smith, AR 72901. The listed phone number is (479) 424-3193.
What is Wallace Lock's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Wallace Lock enrolled in Medicare?
Yes. Wallace Lock 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 Wallace Lock's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Wallace Lock reassigns Medicare benefits to 18 organizations: Mercy Clinic Fort Smith Communities (Fort Smith, AR), Mercy Hospital Waldron (Mansfield, AR), Mercy Hospital Booneville (Booneville, AR), Mercy Hospital Ozark (Ozark, AR), Mercy Hospital Paris (Paris, AR) and 13 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 Wallace Lock's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Wallace Lock accept?
Health plans from Arkansas Blue Cross and Blue Shield, Health Advantage and Octave list Wallace Lock 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 Wallace Lock affiliated with any hospitals?
According to CMS data, Wallace Lock is affiliated with Baptist Memorial Hospital Desoto and Methodist Healthcare - Olive Branch Hospital.
When was this NPI record last updated?
The NPPES record for Wallace Lock was last updated on April 4, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Wallace Lock, M.D. · NPI 1437545761
Emergency Medicine physician in Fort Smith, Arkansas. Individual provider, active in the CMS NPPES registry since April 14, 2015.
## Identity
- **NPI:** 1437545761 (Entity type: Individual)
- **Enumerated:** April 14, 2015
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 67669 (Tennessee)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 612 S 12TH ST, Fort Smith, AR 72901-4702
- **Phone:** (479) 424-3193
## 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:** 18 organizations under Medicare reassignment (form CMS-855R): Mercy Clinic Fort Smith Communities (NPI 1902073620, Fort Smith, AR); Mercy Hospital Waldron (NPI 1295774917, Mansfield, AR); Mercy Hospital Booneville (NPI 1427486794, Booneville, AR); Mercy Hospital Ozark (NPI 1275504128, Ozark, AR); Mercy Hospital Paris (NPI 1881106243, Paris, AR); and 13 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Arkansas College Of Medicine, class of 2015
## Record status
- **NPPES last updated:** April 4, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1437545761) · Data from the CMS NPPES public registry.