NPI Portal NPI Lookup & Verification

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

Peter Shay Johnston, MD

Orthopaedic Surgery Physician in Leonardtown, MD · enumerated 2007 · practices at Robert E Miller MD Faap PA.

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

National Provider Identifier

1194946095

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Registry record

Entity type Individual (Type 1)
Name Peter Shay Johnston
Credential MD
Sex Male
Practice address Leonardtown, MD, 20650
Phone (301) 475-5555
Fax (301) 475-8535
Enumeration date May 1, 2007
Last updated in NPPES May 9, 2013

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 D0072342 (MD) Primary
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.

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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 Peter Johnston?
Peter Johnston is registered in NPPES with the primary taxonomy of Orthopaedic Surgery Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-05-09.