MR. ALAN SIMS A.A.
NPI 1750379640
Anesthesiologist Assistant in Waco, TX
About Mr. Alan Sims A.a. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MR. ALAN SIMS A.A. (NPI 1750379640) is an individual anesthesiologist assistant in Waco, Texas and active in the NPI registry since October 2005. He is affiliated with Ascension Providence, maintains a secondary practice location in Spring, and is a graduate of Other (1997).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
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
Mr. Alan Sims A.a. 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
4Medicare enrollment records show Alan Sims reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Waco, TX 76712
- Reassigned Medicare billing, Texas enrollment
- 184 clinicians in this Medicare group
Waco, TX 76712
- Reassigned Medicare billing, Texas enrollment
- Medicare enrollment name: Mid Tex Anesthesia Associates, P.A.
- 32 clinicians in this Medicare group
Spring, TX 77379
- Reassigned Medicare billing, Texas enrollment
- 220 clinicians in this Medicare group
Houston, TX 77069
- Reassigned Medicare billing, Texas enrollment
- 260 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 2
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
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Ascension Providence
Acute Care Hospitals · Waco, TXOther Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
WACO, TX 76712
WACO, TX 76712
WACO, TX 76712
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 Alan Sims's NPI number?
The NPI number for Alan Sims is 1750379640. It was assigned to this individual provider in the NPPES registry on October 13, 2005.
Where is Alan Sims located?
Alan Sims practices at 100 Hillcrest Medical Blvd, Waco, TX 76712. The listed phone number is (254) 202-2000.
What is Alan Sims's specialty?
The primary specialty registered for this NPI is Anesthesiologist Assistant with taxonomy code 367H00000X.
Is Alan Sims enrolled in Medicare?
Yes. Alan Sims 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 Alan Sims's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Alan Sims reassigns Medicare benefits to 4 organizations: Hillcrest Physician Services (Waco, TX), Mid Tex Anesthesia Associates, PA (Waco, TX), Best Choice Anesthesia & Pain PLLC (Spring, TX) and Northwest Anesthesiology & Pain Services, P.A. (Houston, 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 Alan Sims's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Alan Sims accept?
Health plans from Blue Cross and Blue Shield of Texas list Alan Sims 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 Alan Sims affiliated with any hospitals?
According to CMS data, Alan Sims is affiliated with Ascension Providence.
When was this NPI record last updated?
The NPPES record for Alan Sims was last updated on March 28, 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.
# Mr. Alan Sims, A.A. · NPI 1750379640
Anesthesiologist Assistant physician in Waco, Texas. Individual provider, active in the CMS NPPES registry since October 13, 2005.
## Identity
- **NPI:** 1750379640 (Entity type: Individual)
- **Enumerated:** October 13, 2005
- **Primary specialty:** Anesthesiologist Assistant · taxonomy 367H00000X
- **Sole proprietor:** No
## Practice location
- **Address:** 100 HILLCREST MEDICAL BLVD, Waco, TX 76712
- **Phone:** (254) 202-2000 · **Fax:** (254) 202-5849
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Bills Medicare through:** 4 organizations under Medicare reassignment (form CMS-855R): Hillcrest Physician Services (NPI 1649294323, Waco, TX); Mid Tex Anesthesia Associates, PA (NPI 1174612857, Waco, TX); Best Choice Anesthesia & Pain PLLC (NPI 1699015628, Spring, TX); Northwest Anesthesiology & Pain Services, P.A. (NPI 1629027511, Houston, TX) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1997
## Record status
- **NPPES last updated:** March 28, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1750379640) · Data from the CMS NPPES public registry.