Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Mark Melvyn Segall, M.D.

Colon & Rectal Surgery Physician in Los Gatos, CA · enumerated 2006.

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

National Provider Identifier

1437232451

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Registry record

Entity type Individual (Type 1)

Name Dr. Mark Melvyn Segall

Credential M.D.

Sex Male

Practice address 15195 National Ave, Ste. #202, Los Gatos, CA, 95032

Phone (408) 358-3500

Fax (408) 358-3608

Enumeration date Oct 23, 2006

Last updated in NPPES Sep 14, 2011

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License G024951 (CA) Secondary

208C00000X Colon & Rectal Surgery Physician Allopathic & Osteopathic Physicians · License G024951 (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
0954018	Medicaid	CA	-

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 1437232451 active?

Yes, as of the latest NPPES snapshot, NPI 1437232451 is active (record last updated 2011-09-14).

How do I verify Mark Segall's NPI record?

Cross-check NPI 1437232451 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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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-09-14.