Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. William M. Jacobs, M.D.
Pediatrics Physician in Mesa, AZ · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1962587287
See something wrong? Report a correction
Registry record
Entity type Individual (Type 1)
Name Dr. William M. Jacobs
Credential M.D.
Sex Male
Practice address 8405 E. Baseline Rd., Suite 107, Mesa, AZ, 85209
Phone (480) 615-2010
Fax (480) 218-6053
Enumeration date Oct 26, 2006
Last updated in NPPES Dec 17, 2012
Taxonomy & licenses
208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License 0101030878 (VA) Secondary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure.
About the MD credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 6737846 | Medicaid | VA | - |
| 102616 | Medicaid | AZ | - |
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.
Frequently asked questions
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is William Jacobs?
William Jacobs is registered in NPPES with the primary taxonomy of Pediatrics Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-12-17.