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

Jacob S Toaff, MD

General Acute Care Hospital in Washington, DC · enumerated 2008.

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

National Provider Identifier

1528214392

Verified

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Registry record

Entity type Individual (Type 1)

Name Jacob S Toaff

Credential MD

Sex Male

Practice address Washington, DC, 20007

Phone (202) 444-2600

Fax (202) 444-4859

Enumeration date Aug 13, 2008

Last updated in NPPES Mar 15, 2012

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

Taxonomy & licenses

282N00000X General Acute Care Hospital Hospitals · License MD038115 (DC) 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
P00799112	Other	DC	RAILROAD 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.

Read the full guide → Validate an NPI →

Frequently asked questions

What specialty is Jacob Toaff?

Jacob Toaff is registered in NPPES with the primary taxonomy of General Acute Care Hospital. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-03-15.