Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Alexander C Jacobs, M.D.

Hospitalist Physician in Flagstaff, AZ · enumerated 2012.

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

National Provider Identifier

1528334505

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Registry record

Entity type Individual (Type 1)

Name Alexander C Jacobs

Credential M.D.

Sex Male

Practice address 1200 N Beaver St, Flagstaff, AZ, 86001

Phone (928) 773-2451

Fax (928) 214-2925

Enumeration date Mar 23, 2012

Last updated in NPPES Aug 23, 2022

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 51558 (AZ) Secondary

208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License 51558 (AZ) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD 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 1528334505 active?

Yes, as of the latest NPPES snapshot, NPI 1528334505 is active (record last updated 2022-08-23).

How do I verify Alexander Jacobs's NPI record?

Cross-check NPI 1528334505 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 2022-08-23.