Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Alexander Eliot Halstead, DNP, CRNP, CRNA, FNP

Certified Registered Nurse Anesthetist in Baltimore, MD · enumerated 2017.

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

National Provider Identifier

1689104499

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Registry record

Entity type Individual (Type 1)

Name Dr. Alexander Eliot Halstead

Credential DNP, CRNP, CRNA, FNP

Sex Male

Practice address Department of Anesthesia, Sinai Hospital of Baltimore, 2435 W. Belvedere Ave, 5th Floor, Baltimore, MD, 21215

Phone (410) 601-5209

Enumeration date Jun 14, 2017

Last updated in NPPES Sep 18, 2023

Taxonomy & licenses

163W00000X Registered Nurse Nursing Service Providers · License R195987 (MD) Secondary

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License R195987 (MD) Secondary

367500000X Certified Registered Nurse Anesthetist Physician Assistants & Advanced Practice Nursing Providers · License R195987 (MD) Primary

DNP · Doctor of Nursing Practice: A clinical doctorate for advanced practice nurses. About the DNP credential

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 1689104499 active?

Yes, as of the latest NPPES snapshot, NPI 1689104499 is active (record last updated 2023-09-18).

How do I verify Alexander Halstead's NPI record?

Cross-check NPI 1689104499 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-09-18.