Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Ms. Barbara Aileen Miller, NP
Nurse Practitioner in Baltimore, MD · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1629199179
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Registry record
Entity type Individual (Type 1)
Name Ms. Barbara Aileen Miller
Credential NP
Sex Female
Practice address 22 S Greene St, Baltimore, MD, 21201
Phone (410) 328-5300
Fax (410) 328-2109
Enumeration date Apr 3, 2007
Last updated in NPPES Mar 7, 2023
Taxonomy & licenses
363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License R080137 (MD) Primary
NP · Nurse Practitioner: An advanced practice registered nurse with graduate training, licensed to diagnose and treat, often with prescriptive authority.
About the NP credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 736472 | Other | MD | NCPPO |
| 2505201 | Other | MD | UNITED NATIONAL PRODUCT |
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 Barbara Miller?
Barbara Miller is registered in NPPES with the primary taxonomy of Nurse Practitioner. 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 2023-03-07.