MARIA HAYS AA
NPI 1225974579
Anesthesiologist Assistant in Greenwood Village, CO

Q: What is Maria Hays's NPI number?

The NPI number for Maria Hays is 1225974579. It was assigned to this individual provider in the NPPES registry on April 28, 2026.

Q: What is Maria Hays's specialty?

The primary specialty registered for this NPI is Anesthesiologist Assistant with taxonomy code 367H00000X.

Q: When was this NPI record last updated?

The NPPES record for Maria Hays was last updated on June 10, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.

Active since April 28, 2026Accepts Medicare Assignment

8000 E MAPLEWOOD AVE STE 120, GREENWOOD VILLAGE, CO 80111(303) 438-3999(720) 439-9500 Get Directions Write a Review

NPPES record last updated: June 10, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

On this page

About Maria Hays Aa NPPES

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

MARIA HAYS AA (NPI 1225974579) is an individual anesthesiologist assistant in Greenwood Village, Colorado, licensed in Colorado (ANT.0000342) and active in the NPI registry since April 2026. She is a graduate of Other (2026).

NPPES Registry Identity

NPI1225974579

Entity TypeIndividualFemale

Primary Taxonomy367H00000X

Provider Legal NameMARIA HAYSCredential: AA

Location Address8000 E MAPLEWOOD AVE STE 120Greenwood Village, CO 80111-4766

Mailing AddressPo Box 840862Dallas, TX 75284-0862 · (303) 377-7638 · Fax (303) 780-0787

Phone(303) 438-3999

Fax(720) 439-9500

Sole ProprietorNo

Medical School CMSOtherGraduated 2026

Enumeration DateApril 28, 2026

Last NPPES UpdateJune 10, 2026

NPPES CertifiedJune 10, 2026

✔ NPI 1225974579 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAnesthesiologist AssistantPhysician Assistants & Advanced Practice Nursing Providers

Taxonomy Code367H00000X

License✔ Licensed in CO · ANT.0000342

Definition

An individual certified by the state to perform anesthesia services under the direct supervision of an anesthesiologist. Anesthesiologist Assistants are required to have a bachelor's degree with a premed curriculum prior to entering a two-year anesthesiology assistant program, which is focused upon the delivery and maintenance of anesthesia care as well as advanced patient monitoring techniques. An Anesthesiologist Assistant must work as a member of the anesthesia care team under the direction of a qualified Anesthesiologist.

8000 E MAPLEWOOD AVE STE 120, Greenwood Village, CO 80111

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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

Maria Hays Aa 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 ID4688148448

PECOS Enrollment IDI20260702000165

Medicare Billing Reassignment

Medicare enrollment records show Maria Hays reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Us Anesthesia Partners Of Colorado Inc.

Same address

Anesthesiology

8000 E MAPLEWOOD AVE STE 120
Greenwood Village, CO 80111

Reassigned Medicare billing, Colorado enrollment
971 clinicians in this Medicare group

NPI 1922365782 (303) 438-3999

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.

JENNIFER K KROGH CRNA

Nurse Anesthetist, Certified Registered