Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mark H Ellis, MD

Q: What is the NPI number for Mark Ellis?

The National Provider Identifier (NPI) for Mark Ellis is 1144317462, a Type 1 (individual) record in the CMS NPPES registry.

Infectious Disease Physician in Fairfield, CA · enumerated 2006 · practices at Sutter Regional Medical Foundation.

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

National Provider Identifier

1144317462

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Mark H Ellis

Credential MD

Sex Male

Practice address 1234 Empire St, Fairfield, CA, 94533

Phone (707) 426-3911

Fax (707) 434-2043

Enumeration date Oct 6, 2006

Last updated in NPPES Sep 11, 2025

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License A26035 (CA) Secondary

207RI0200X Infectious Disease Physician Allopathic & Osteopathic Physicians · License A26035 (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
00A260350	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

What is the NPI number for Mark Ellis?

The National Provider Identifier (NPI) for Mark Ellis is 1144317462, a Type 1 (individual) record in the CMS NPPES registry.

Where does Mark Ellis practice?

The practice location on file with NPPES is in Fairfield, CA. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Henry Collins Pediatrics Physician · Fairfield, CA NPI 1215024591 Daniel Green Internal Medicine Physician · Fairfield, CA NPI 1386731602 Frederick Blair Obstetrics & Gynecology Physician · Fairfield, CA NPI 1386731768 Malalai Mojaddidi Optometrist · Fairfield, CA NPI 1427146273 Michael Moshier Family Medicine Physician · Fairfield, CA NPI 1558459313 Sutter Regional Medical Foundation Mammography Clinic/Center · Fairfield, CA NPI 1255429429 Mark Sullivan Family Medicine Physician · Fairfield, CA NPI 1871673723 Mark Susskind Urology Physician · Fairfield, CA NPI 1003996950

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-11.