NPI Portal NPI Lookup & Verification

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

Dr. Mark J Stamm, MD

Ophthalmology Physician in Lewes, DE · enumerated 2005.

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

National Provider Identifier

1922082387

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Registry record

Entity type Individual (Type 1)
Name Dr. Mark J Stamm
Credential MD
Sex Male
Practice address Lewes, DE, 19958
Phone (914) 283-9027
Fax (845) 294-1479
Enumeration date Nov 30, 2005
Last updated in NPPES Jul 28, 2025

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

Taxonomy & licenses

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License C1-0027102 (DE) 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
000607658 Medicaid NY -

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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Mark Stamm practice?
The practice location on file with NPPES is in Lewes, DE. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Mark Stamm?
The National Provider Identifier (NPI) for Mark Stamm is 1922082387, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-07-28.