Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Preston W Douglas, M.D.

Neurology Physician in Newport, RI · enumerated 2014.

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

National Provider Identifier

1821416637

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Registry record

Entity type Individual (Type 1)

Name Preston W Douglas

Credential M.D.

Sex Male

Practice address 19 Friendship St, Newport, RI, 02840

Phone (401) 845-3800

Enumeration date Mar 31, 2014

Last updated in NPPES Jun 27, 2019

Taxonomy & licenses

2084N0400X Neurology Physician Allopathic & Osteopathic Physicians · License MD16188 (RI) 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.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1821416637 active?

Yes, as of the latest NPPES snapshot, NPI 1821416637 is active (record last updated 2019-06-27).

How do I verify Preston Douglas's NPI record?

Cross-check NPI 1821416637 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Brenda Burke Rheumatology Physician · Newport, RI NPI 1992702138 Laureen Martin Nurse Practitioner · Newport, RI NPI 1962409102 Alessandro Papa Hematology & Oncology Physician · Newport, RI NPI 1295725141 Judi Rosenthal Gynecology Physician · Newport, RI NPI 1972585776 Randall Rosenthal Obstetrics & Gynecology Physician · Newport, RI NPI 1760464150 Kenneth Bradshaw Family Medicine Physician · Newport, RI NPI 1932182615 Michael Knowlan Psychiatry Physician · Newport, RI NPI 1356315055 Scott Mcdonald Psychiatry Physician · Newport, RI NPI 1942239363

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-06-27.