Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

MARY ELIZABETH IIAMS CRNA
NPI 1881565901
Nurse Anesthetist, Certified Registered in Denison, TX

Active since September 12, 2025Accepts Medicare Assignment
5016 N HWY 75, DENISON, TX 75020(903) 416-4000 Get Directions Write a Review

NPPES record last updated: August 24, 2026. Verified against the NPPES registry weekly; last sync: September 20, 2026.

Record update history: Aug 24, 2026, Sep 12, 2025 (2 updates tracked since 2025).

About Mary Elizabeth Iiams Crna NPPES

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

MARY ELIZABETH IIAMS CRNA (NPI 1881565901) is an individual nurse anesthetist, certified registered in Denison, Texas, licensed in Texas (151689) and active in the NPI registry since September 2025. She is affiliated with Texoma Medical Center and is a graduate of Other (2025).

NPPES Registry Identity

NPI1881565901
Entity TypeIndividualFemale
Primary Taxonomy367500000X
Provider Legal NameMARY ELIZABETH IIAMSCredential: CRNA
Location Address5016 N HWY 75Denison, TX 75020
Mailing Address5649 Bois D Arc Rd Apt 5107Mckinney, TX 75071-5882
Sole ProprietorNo
Medical School CMSOtherGraduated 2025
Enumeration DateSeptember 12, 2025
Last NPPES UpdateAugust 24, 20262 updates tracked since enumeration
NPPES CertifiedAugust 24, 2026
✔ NPI 1881565901 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 TX · 151689
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.
5016 N HWY 75, Denison, TX 75020

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Mary Elizabeth Iiams 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 ID9032602107
PECOS Enrollment IDI20251205003342

Hospital Affiliations CMS Care Compare

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

Texoma Medical Center

Acute Care Hospitals · Denison, TX
3/5 CMS rating
OwnershipProprietary
CMS Certification Number450324
Location5016 S Us Highway 75Denison, TX 75020 · Grayson County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 75020 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 2

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

Student in an Organized Health Care Education/Training Program
5016 N HWY 75
DENISON, TX 75020
Physician Assistant (Medical)
5016 N HWY 75
DENISON, TX 75020

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 Mary Iiams's NPI number?

The NPI number for Mary Iiams is 1881565901. It was assigned to this individual provider in the NPPES registry on September 12, 2025.

Where is Mary Iiams located?

Mary Iiams practices at 5016 N Hwy 75, Denison, TX 75020. The listed phone number is (903) 416-4000.

What is Mary Iiams's specialty?

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

Is Mary Iiams enrolled in Medicare?

Yes. Mary Iiams 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.

Is Mary Iiams affiliated with any hospitals?

According to CMS data, Mary Iiams is affiliated with Texoma Medical Center.

When was this NPI record last updated?

The NPPES record for Mary Iiams was last updated on August 24, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 33 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.