Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Grant Stephan Geisler, CRNA

Certified Registered Nurse Anesthetist in Greenwood Village, CO · enumerated 2013.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1538400973

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Registry record

Entity type Individual (Type 1)

Name Grant Stephan Geisler

Credential CRNA

Sex Male

Practice address 8000 E Maplewood Ave, Greenwood Village, CO, 80111

Phone (303) 785-4700

Fax (303) 336-8350

Enumeration date Mar 11, 2013

Last updated in NPPES Sep 24, 2024

Taxonomy & licenses

207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians · License 680095 (NY) Secondary

367500000X Certified Registered Nurse Anesthetist Physician Assistants & Advanced Practice Nursing Providers · License ARNP9270689 (FL) Secondary

367500000X Certified Registered Nurse Anesthetist Physician Assistants & Advanced Practice Nursing Providers · License APN.0993822 (CO) Primary

CRNA · Certified Registered Nurse Anesthetist: An advanced practice nurse specializing in anesthesia care. About the CRNA credential

Other identifiers

Identifier	Type	State	Issuer
008422100	Medicaid	FL	-
003132455A	Medicaid	GA	-

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1538400973 active?

Yes, as of the latest NPPES snapshot, NPI 1538400973 is active (record last updated 2024-09-24).

How do I verify Grant Geisler's NPI record?

Cross-check NPI 1538400973 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-09-24.