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

David Alexander Jacoby, MD

Internal Medicine Physician in San Carlos, CA · enumerated 2006.

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

National Provider Identifier

1295715134

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Registry record

Entity type Individual (Type 1)

Name David Alexander Jacoby

Credential MD

Sex Male

Practice address San Carlos, CA, 94070

Phone (650) 631-7000

Fax (650) 631-2309

Enumeration date Jan 18, 2006

Last updated in NPPES Nov 29, 2021

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

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License G27649 (CA) 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
011912530	Other	CA	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 David Jacoby?

David Jacoby is registered in NPPES with the primary taxonomy of Internal Medicine Physician. 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.

Other providers at this practice address

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Gail Jacoby Dermatology Physician · San Carlos, CA NPI 1912987314

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-11-29.