Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Jo Bess Hammer, MD
Gynecology Physician in Austin, TX · enumerated 2005.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1255318713
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Registry record
Entity type Individual (Type 1)
Name Jo Bess Hammer
Credential MD
Sex Female
Practice address 1015 E 32nd St, #516, Austin, TX, 78705
Phone (512) 477-1954
Fax (512) 477-2826
Enumeration date Dec 27, 2005
Last updated in NPPES Jul 8, 2007
Taxonomy & licenses
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.
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 Jo Hammer?
Jo Hammer is registered in NPPES with the primary taxonomy of Gynecology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.