Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mary E Fontana-Penn, MD
Allergy Physician in Nottingham, MD · enumerated 2005.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1750367074
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Registry record
Entity type Individual (Type 1)
Name Mary E Fontana-Penn
Credential MD
Sex Female
Practice address 7939 Honeygo Blvd, Suite 219, Nottingham, MD, 21236
Phone (410) 931-0404
Fax (410) 931-0405
Enumeration date Dec 19, 2005
Last updated in NPPES Jan 21, 2021
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
What specialty is Mary Fontana-Penn?
Mary Fontana-Penn is registered in NPPES with the primary taxonomy of Allergy 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 → Lois Endo Allergy Physician · Baltimore, MD NPI 1013946185 Cynthia Cootauco Endodontics · Baltimore, MD NPI 1578592333 Michael Moreno Endodontics · Baltimore, MD NPI 1619906492 Michelle Rampulla Endodontics · Baltimore, MD NPI 1538198320 Charles Herbert Endodontics · Baltimore, MD NPI 1578595609 Gerard Simoneaux Endodontics · Baltimore, MD NPI 1366474272 Endodontics, P.A. Endodontics · Baltimore, MD NPI 1558395483 David Golden Allergy Physician · Baltimore, MD NPI 1609969708
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-01-21.