Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Howard C Marks, M.D.

Gastroenterology Physician in Manteca, CA · enumerated 2006.

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

National Provider Identifier

1962479352

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Howard C Marks

Credential M.D.

Sex Male

Practice address 1234 E North St, Suite 201, Manteca, CA, 95336

Phone (209) 239-0515

Fax (209) 239-0504

Enumeration date Mar 3, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

207RG0100X Gastroenterology Physician Allopathic & Osteopathic Physicians · License G49155 (CA) 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

How do I verify Howard Marks's NPI record?

Cross-check NPI 1962479352 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1962479352 active?

Yes, as of the latest NPPES snapshot, NPI 1962479352 is active (record last updated 2007-07-08).

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.