Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Christopher M Marks, PA-C

Physician Assistant in Stamford, CT · enumerated 2019.

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

National Provider Identifier

1831661859

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Mr. Christopher M Marks

Credential PA-C

Sex Male

Practice address 1 Hospital Plz, Stamford, CT, 06902

Phone (203) 276-1000

Enumeration date Jan 2, 2019

Last updated in NPPES Jan 4, 2019

Taxonomy & licenses

363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers Primary

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 1831661859 active?

Yes, as of the latest NPPES snapshot, NPI 1831661859 is active (record last updated 2019-01-04).

How do I verify Christopher Marks's NPI record?

Cross-check NPI 1831661859 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-01-04.