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GREGORY S ALEXANDER CRNA
NPI 1396770590
Nurse Anesthetist, Certified Registered in San Marcos, TX

Active since July 12, 2006Accepts Medicare Assignment
1305 WONDER WORLD DR, SUITE 105, SAN MARCOS, TX 78666(512) 353-8161(512) 353-8255 Get Directions Write a Review

NPPES record last updated: September 4, 2014. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Gregory S Alexander Crna NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

GREGORY S ALEXANDER CRNA (NPI 1396770590) is an individual nurse anesthetist, certified registered in San Marcos, Texas, licensed in Mississippi (A810161) and active in the NPI registry since July 2006. He is affiliated with Hendrick Medical Center Brownwood and is a graduate of Other (2004).

NPPES Registry Identity

NPI1396770590
Entity TypeIndividualMale
Primary Taxonomy367500000X
Provider Legal NameGREGORY S ALEXANDERCredential: CRNA
Location Address1305 WONDER WORLD DR, SUITE 105San Marcos, TX 78666-7546
Mailing AddressPo Box 20452, Yps-credColumbus, OH 43220-0452 · (614) 442-2406 · Fax (614) 442-2410
Phone(512) 353-8161
Fax(512) 353-8255
Sole ProprietorNo
Medical School CMSOtherGraduated 2004
Enumeration DateJuly 12, 2006
Last NPPES UpdateSeptember 4, 2014
✔ NPI 1396770590 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse Anesthetist, Certified RegisteredPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code367500000X
License✔ Licensed in MS · A810161
Definition
(1) A licensed registered nurse with advanced specialty education in anesthesia who, in collaboration with appropriate health care professionals, provides preoperative, intraoperative, and postoperative care to patients and assists in management and resuscitation of critical patients in intensive care, coronary care, and emergency situations. Nurse anesthetists are certified following successful completion of credentials and state licensure review and a national examination directed by the Council on Certification of Nurse Anesthetists. (2) A registered nurse who is qualified by special training to administer anesthesia in collaboration with a physician or dentist and who can assist in the care of patients who are in critical condition.
1305 WONDER WORLD DR, San Marcos, TX 78666
Open in Google Maps ↗

Other Identifiers 6

Medicare ID-Type Unspecified430002101MS
Medicaid200648804TX
Other8876UDTX · Bcbs Tx
Medicare UPINQ38099
Medicaid04624594MS
Medicare PIN272878YK3ETX

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Baylor Scott and White Health Plan, Blue Cross and Blue Shield of Texas, Oscar Insurance Company and more.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

Gregory S Alexander Crna 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.

PECOS PAC ID9133179047
PECOS Enrollment IDI20090312000643

Medicare Billing Reassignments

3

Medicare enrollment records show Gregory Alexander reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Endo Sedation LLC
170 mi
Nurse Anesthetist, Certified Registered
1015 W MEDICAL CENTER BLVD STE 1200
Webster, TX 77598
  • Reassigned Medicare billing, Texas enrollment
  • 710 clinicians in this Medicare group
NPI 1811464936 (281) 554-3494
Emergenchealth PLLC
198 mi
Anesthesiology
4100 INTERNATIONAL PLZ STE 800
Fort Worth, TX 76109
  • Reassigned Medicare billing, Texas enrollment
  • 1,612 clinicians in this Medicare group
NPI 1467970897 (972) 861-1270
Youngs Professional Services LLC
369 mi
Nurse Anesthetist, Certified Registered
1100 ANDRE ST, SUITE 300
New Iberia, LA 70563
  • Reassigned Medicare billing, Texas enrollment
  • 282 clinicians in this Medicare group
NPI 1922178599 (337) 364-9225

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 4

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.

Anesthesia for exam of colon using an endoscope 00812
Anesthesia for a colon examination with an endoscope is a method used to ensure comfort during the procedure. It involves administering medication to help you relax or sleep, thus reducing discomfort as the endoscope, a thin, flexible tube, is navigated through your colon.
43 services43 patients
Anesthesia for lens surgery 00142
Anesthesia for lens surgery involves administering medication to numb the eye area, ensuring you feel no pain during the procedure. This can be a local anesthetic (numbing only the eye area) or general (where you're asleep). It helps make the surgery comfortable and stress-free.
19 services19 patients
Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope 00731
This procedure involves the use of an endoscope, a flexible tube with a light and camera, to examine your esophagus, stomach, or upper small bowel. Anesthesia ensures you are comfortable and pain-free during the procedure.
14 services13 patients
Anesthesia for other procedure on lower leg, ankle, and foot bones 01480
Anesthesia for procedures on lower leg, ankle, and foot bones involves administering medication to block pain and sensation in these areas. This allows doctors to perform necessary treatments or surgeries without causing discomfort. The type of anesthesia used can vary based on the specific procedure.
12 services11 patients

Hospital Affiliations CMS Care Compare 2

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Hendrick Medical Center Brownwood

Acute Care Hospitals · Brownwood, TX
1/5 CMS rating
OwnershipProprietary
CMS Certification Number450587
Location1501 Burnet DrBrownwood, TX 76801 · Brown County
Emergency services Birthing friendly

Ascension Seton Highland Lakes

Critical Access Hospitals · Burnet, TX
OwnershipVoluntary non-profit - Private
CMS Certification Number451365
Location3201 S Water StBurnet, TX 78611 · Burnet County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 78666 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$126.40 typical visit price
range $54.84 – $166.88
Typical copayment $31.60 (range $13.71 – $41.72)
Most-billed visit code 99204
Established Patient
$68.55 typical visit price
range $17.52 – $136.11
Typical copayment $17.13 (range $4.38 – $34.02)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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.

DR. WILLIAM K DESCHNER M.D.
Internal Medicine (Gastroenterology)
1305 WONDER WORLD DR, SUITE 200
SAN MARCOS, TX 78666
Hays County (512) 754-8676
RX MANAGEMENT CONSULTANTS
Pharmacist
1305 WONDER WORLD DR, STE 102
SAN MARCOS, TX 78666
Hays County (512) 392-6777
WENDELL M HOLLADAY CRNA
Nurse Anesthetist, Certified Registered
1305 WONDER WORLD DR, STE. 105
SAN MARCOS, TX 78666
Hays County (512) 353-8161
DR. CARLOS NEGHME M.D.
Internal Medicine (Gastroenterology)
1305 WONDER WORLD DR, SUITE 200
SAN MARCOS, TX 78666
Hays County (512) 754-8676
BUDA MEDICAL AND SURGICAL CLINIC
Internal Medicine
1305 WONDER WORLD DR, STE 206
SAN MARCOS, TX 78666
Hays County (512) 396-1525
DR. TERESA LYNN IRWIN MD
Obstetrics & Gynecology (Urogynecology and Reconstructive Pelvic Surgery)
1305 WONDER WORLD DR, SUITE 209
SAN MARCOS, TX 78666
Hays County (512) 396-7575
MS. DEBORAH YOUNG HALL RNC,WHCNP
Nurse Practitioner (Women's Health)
1305 WONDER WORLD DR, SUITE 209
SAN MARCOS, TX 78666
Hays County (512) 396-7575
MRS. CAROL ANN COX GARNER MSN,CS,FNP
Nurse Practitioner (Family)
1305 WONDER WORLD DR, SUITE 209
SAN MARCOS, TX 78666
Hays County (512) 396-7575

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 Gregory Alexander's NPI number?

The NPI number for Gregory Alexander is 1396770590. It was assigned to this individual provider in the NPPES registry on July 12, 2006.

Where is Gregory Alexander located?

Gregory Alexander practices at 1305 Wonder World Dr Suite 105, San Marcos, TX 78666. The listed phone number is (512) 353-8161.

What is Gregory Alexander's specialty?

The primary specialty registered for this NPI is Nurse Anesthetist, Certified Registered with taxonomy code 367500000X.

Is Gregory Alexander enrolled in Medicare?

Yes. Gregory Alexander 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 Gregory Alexander's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Gregory Alexander reassigns Medicare benefits to 3 organizations: Endo Sedation LLC (Webster, TX), Emergenchealth PLLC (Fort Worth, TX) and Youngs Professional Services LLC (New Iberia, LA). 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 Gregory Alexander's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Gregory Alexander accept?

Health plans from Baylor Scott and White Health Plan, Blue Cross and Blue Shield of Texas, Oscar Insurance Company and Sendero Health Plans, Local Nonprofit list Gregory Alexander 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 Gregory Alexander affiliated with any hospitals?

According to CMS data, Gregory Alexander is affiliated with Hendrick Medical Center Brownwood and Ascension Seton Highland Lakes.

When was this NPI record last updated?

The NPPES record for Gregory Alexander was last updated on September 4, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.