Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Walter J Duffy, MD
Psychiatry Physician in Lincoln, NE · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1093853368
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Registry record
Entity type Individual (Type 1)
Name Dr. Walter J Duffy
Credential MD
Sex Male
Practice address 8101 O St, Suite 300, Lincoln, NE, 68510
Phone (402) 476-6060
Fax (402) 476-6809
Enumeration date Feb 1, 2007
Last updated in NPPES Sep 12, 2008
Taxonomy & licenses
2084P0804X Child & Adolescent Psychiatry Physician Allopathic & Osteopathic Physicians · License 18400 (NE) 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 |
|---|---|---|---|
| 10025071300 | Medicaid | NE | - |
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
What specialty is Walter Duffy?
Walter Duffy is registered in NPPES with the primary taxonomy of Psychiatry Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
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.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-09-12.