NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Mark D Allen, MD

Orthopaedic Surgery Physician in Lansdowne, PA · enumerated 2005 · practices at Allied Medical Associates, P.C..

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1548253834

Verified

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Registry record

Entity type Individual (Type 1)
Name Mark D Allen
Credential MD
Sex Male
Practice address Lansdowne, PA, 19050
Phone (610) 259-8344
Fax (610) 259-3385
Enumeration date Aug 23, 2005
Last updated in NPPES Nov 21, 2016

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License MD038491L (PA) Primary
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
0103215202 Other PA AMERICHOICE
1148659 Other PA KEYSTONE MERCY
15010 Other PA BRAVO ELDER HEALTH
13361 Other PA HEALTH PARTNERS
995155 Other PA HIGHMARK
001032152 Medicaid PA -
P00197203 Other PA RR MEDICARE

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.

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Frequently asked questions

What is the NPI number for Mark Allen?
The National Provider Identifier (NPI) for Mark Allen is 1548253834, a Type 1 (individual) record in the CMS NPPES registry.
Where does Mark Allen practice?
The practice location on file with NPPES is in Lansdowne, PA. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-11-21.