CHARLES G. KNOX M.D.
NPI 1881960805
Pediatrics - Pediatric Emergency Medicine in Dallas, TX
About Charles G. Knox M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
CHARLES G. KNOX M.D. (NPI 1881960805) is an individual pediatric emergency medicine provider in Dallas, Texas, licensed in Texas (Q7222) and active in the NPI registry since March 2012. He is enrolled in Medicare PECOS and maintains 2 additional practice locations.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Locations 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 (PECOS)
Charles G. Knox M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
3Medicare enrollment records show Charles Knox reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Dallas, TX 75230
- Reassigned Medicare billing, Texas enrollment
- 454 clinicians in this Medicare group
Plano, TX 75024
- Reassigned Medicare billing, Texas enrollment
- 123 clinicians in this Medicare group
Austin, TX 78705
- Reassigned Medicare billing, Texas enrollment
- 547 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 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
DALLAS, TX 75230
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 Charles Knox's NPI number?
The NPI number for Charles Knox is 1881960805. It was assigned to this individual provider in the NPPES registry on March 23, 2012.
Where is Charles Knox located?
Charles Knox practices at 7777 Forest Ln, Dallas, TX 75230. The listed phone number is (972) 566-7000.
What is Charles Knox's specialty?
The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Emergency Medicine, with taxonomy code 2080P0204X.
Is Charles Knox enrolled in Medicare?
Yes. Charles Knox is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Charles Knox's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Charles Knox reassigns Medicare benefits to 3 organizations: Questcare Medical Services, PLLC (Dallas, TX), Pediatric Emergency Medicine Group LLP (Plano, TX) and Longhorn Emergency Medical Associates PA (Austin, TX). 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 Charles Knox's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Charles Knox accept?
Health plans from Blue Cross and Blue Shield of Texas and Oscar Insurance Company list Charles Knox 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 Charles Knox was last updated on September 18, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 38 days 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.
# Charles G. Knox, M.D. · NPI 1881960805
Pediatric Emergency Medicine physician in Dallas, Texas. Individual provider, active in the CMS NPPES registry since March 23, 2012.
## Identity
- **NPI:** 1881960805 (Entity type: Individual)
- **Enumerated:** March 23, 2012
- **Primary specialty:** Pediatrics - Pediatric Emergency Medicine · taxonomy 2080P0204X
- **State license:** Q7222 (Texas)
- **Sole proprietor:** No
## Practice location
- **Address:** 7777 FOREST LN, Dallas, TX 75230
- **Phone:** (972) 566-7000
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): Questcare Medical Services, PLLC (NPI 1912059247, Dallas, TX); Pediatric Emergency Medicine Group LLP (NPI 1629448535, Plano, TX); Longhorn Emergency Medical Associates PA (NPI 1649669672, Austin, TX) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** September 18, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1881960805) · Data from the CMS NPPES public registry.