Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Eric Karl Undesser, MD, PHD
Neurology Physician in Jackson, MS · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1124051321
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Registry record
Entity type Individual (Type 1)
Name Dr. Eric Karl Undesser
Credential MD, PHD
Sex Male
Practice address 1500 E Woodrow Wilson Ave, Jackson, MS, 39216
Phone (601) 364-1285
Fax (601) 364-1257
Enumeration date Jul 9, 2006
Last updated in NPPES Apr 7, 2014
Taxonomy & licenses
2084N0600X Clinical Neurophysiology Physician Allopathic & Osteopathic Physicians · License 11945 (MS) Secondary
2084N0600X Clinical Neurophysiology Physician Allopathic & Osteopathic Physicians · License G8472 (TX) 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 |
|---|---|---|---|
| 09880325 | Medicaid | MS | - |
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
Where does Eric Undesser practice?
The practice location on file with NPPES is in Jackson, MS. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Eric Undesser?
The National Provider Identifier (NPI) for Eric Undesser is 1124051321, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
Browse all → Sadeka Tamanna Internal Medicine Physician · Jackson, MS NPI 1740264035 Tatonja Jones Family Nurse Practitioner · Jackson, MS NPI 1013989953 Rebecca Clanton Family Nurse Practitioner · Jackson, MS NPI 1508827205 Jackson Vamc Department of Veterans Affairs (VA) Pharmacy · Jackson, MS NPI 1932167756 Jennifer Watson Acute Care Nurse Practitioner · Jackson, MS NPI 1225087117 Jackson Vamc General Acute Care Hospital · Jackson, MS NPI 1992754543 James Whelan Pharmacist · Jackson, MS NPI 1649224445 Leah Russell Pharmacotherapy Pharmacist · Jackson, MS NPI 1134173412
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-04-07.