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

Donald A. Derolf, MD

Family Medicine Physician in Middletown, RI · enumerated 2005.

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

National Provider Identifier

1528065745

Verified

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Registry record

Entity type Individual (Type 1)

Name Donald A. Derolf

Credential MD

Sex Male

Practice address Middletown, RI, 02842

Phone (401) 683-8895

Fax (401) 849-5780

Enumeration date Jul 1, 2005

Last updated in NPPES Feb 25, 2020

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

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License MD 05292 (RI) Secondary

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License MD05292 (RI) 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
20375-3	Other	RI	RI BC/BS
7003354	Medicaid	RI	-
003642	Other	RI	RI BLUE CHIP

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 1528065745 active?

Yes, as of the latest NPPES snapshot, NPI 1528065745 is active (record last updated 2020-02-25).

How do I verify Donald Derolf's NPI record?

Cross-check NPI 1528065745 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-02-25.