ARISTOTLE ALMAZAR CALLADO DO
NPI 1144843970
Emergency Medicine in Sherman, TX
About Aristotle Almazar Callado Do NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ARISTOTLE ALMAZAR CALLADO DO (NPI 1144843970) is an individual emergency medicine provider in Sherman, Texas, licensed in Oklahoma (8009) and active in the NPI registry since May 2020. He is enrolled in Medicare PECOS, is affiliated with Paris Regional Medical Center, and is a graduate of Other (2020).
NPPES Registry Identity
Specialties & Licenses 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 and accepts Medicare assignment
Aristotle Almazar Callado 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 Reassignments
7Medicare enrollment records show Aristotle Callado reassigns Medicare billing to 7 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Denison, TX 75020
- Reassigned Medicare billing, Texas enrollment
- 67 clinicians in this Medicare group
Gainesville, TX 76240
- Reassigned Medicare billing, Texas enrollment
- 1,193 clinicians in this Medicare group
Allen, TX 75013
- Reassigned Medicare billing, Texas enrollment
- 128 clinicians in this Medicare group
Norman, OK 73071
- Reassigned Medicare billing, Oklahoma enrollment
- 418 clinicians in this Medicare group
Oklahoma City, OK 73102
- Reassigned Medicare billing, Oklahoma enrollment
- Medicare enrollment name: Emergency Physicians Of Mid-America PC
- 310 clinicians in this Medicare group
Stillwater, OK 74074
- Reassigned Medicare billing, Oklahoma enrollment
- 298 clinicians in this Medicare group
Ponca City, OK 74601
- Reassigned Medicare billing, Oklahoma enrollment
- 130 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 3
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Paris Regional Medical Center
Acute Care Hospitals · Paris, TXTexoma Medical Center
Acute Care Hospitals · Denison, TXUt Health East Texas Athens Hospital
Acute Care Hospitals · Athens, TXPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 75090 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.
SHERMAN, TX 75090
SHERMAN, TX 75090
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 Aristotle Callado's NPI number?
The NPI number for Aristotle Callado is 1144843970. It was assigned to this individual provider in the NPPES registry on May 27, 2020.
Where is Aristotle Callado located?
Aristotle Callado practices at 809 Gallagher Dr Ste D, Sherman, TX 75090. The listed phone number is (903) 771-2846.
What is Aristotle Callado's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Aristotle Callado enrolled in Medicare?
Yes. Aristotle Callado 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 Aristotle Callado's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Aristotle Callado reassigns Medicare benefits to 7 organizations: Level One Emergency Physicians LLC (Denison, TX), Acs Primary Care Physicians Southwest, PA (Gainesville, TX), Elite Hospital Partners, PLLC (Allen, TX), Emergency Services Of Oklahoma PC (Norman, OK), Emergency Physicians Of Mid-America, P.C. (Oklahoma City, OK) and 2 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 Aristotle Callado's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Aristotle Callado accept?
Health plans from Blue Cross and Blue Shield of Texas and Imperial Insurance Companies, Inc. list Aristotle Callado 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 Aristotle Callado affiliated with any hospitals?
According to CMS data, Aristotle Callado is affiliated with Paris Regional Medical Center, Texoma Medical Center and Ut Health East Texas Athens Hospital.
When was this NPI record last updated?
The NPPES record for Aristotle Callado was last updated on November 7, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 23 months 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.
# Aristotle Almazar Callado, DO · NPI 1144843970
Emergency Medicine physician in Sherman, Texas. Individual provider, active in the CMS NPPES registry since May 27, 2020.
## Identity
- **NPI:** 1144843970 (Entity type: Individual)
- **Enumerated:** May 27, 2020
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 8009 (Oklahoma)
- **Sole proprietor:** No
## Practice location
- **Address:** 809 GALLAGHER DR STE D, Sherman, TX 75090-1754
- **Phone:** (903) 771-2846
## 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:** 7 organizations under Medicare reassignment (form CMS-855R): Level One Emergency Physicians LLC (NPI 1528790193, Denison, TX); Acs Primary Care Physicians Southwest, PA (NPI 1538101019, Gainesville, TX); Elite Hospital Partners, PLLC (NPI 1609625995, Allen, TX); Emergency Services Of Oklahoma PC (NPI 1215249891, Norman, OK); Emergency Physicians Of Mid-America, P.C. (NPI 1063825297, Oklahoma City, OK); and 2 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2020
## Record status
- **NPPES last updated:** November 7, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1144843970) · Data from the CMS NPPES public registry.