Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Eva F. Simmons-O'Brien, M.D.
Dermatology Physician in Towson, MD · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1285663542
See something wrong? Report a correction
Registry record
Entity type Individual (Type 1)
Name Dr. Eva F. Simmons-O'Brien
Credential M.D.
Sex Female
Practice address 8320 Bellona Ave, Suite 20, Towson, MD, 21204
Phone (410) 821-7645
Fax (410) 821-7576
Enumeration date Jun 30, 2006
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
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| KEY7 | Other | MD | BLUE SHIELD OF MD |
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 Eva Simmons-O'Brien?
Eva Simmons-O'Brien is registered in NPPES with the primary taxonomy of Dermatology 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
Browse all → Diane Orlinsky Dermatology Physician · Towson, MD NPI 1194771642 Darlene Nasuta Occupational Therapist · Towson, MD NPI 1720167547 Thomas Ritter Dentist · Towson, MD NPI 1528130796 Peter P Stamas MD PA Internal Medicine Physician · Towson, MD NPI 1043409188 Alexandra Antonopoulou LLC Endodontics · Towson, MD NPI 1306172226 Therapy & Learning Center, LLC Occupational Medicine Clinic/Center · Towson, MD NPI 1114262813
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.