Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dennis S Riff, M.D.

Specialist in Anaheim, CA · enumerated 2005.

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

National Provider Identifier

1922004662

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dennis S Riff

Credential M.D.

Sex Male

Practice address 1211 W La Palma Ave, Ste 306, Anaheim, CA, 92801

Phone (714) 778-1300

Fax (714) 778-0303

Enumeration date Jun 27, 2005

Last updated in NPPES Jan 14, 2013

Taxonomy & licenses

174400000X Specialist Other Service Providers · License G22807 (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
ZZZ83646Z	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 specialty is Dennis Riff?

Dennis Riff is registered in NPPES with the primary taxonomy of Specialist. 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

Browse all →

Manilal Mehta Urology Physician · Anaheim, CA NPI 1124024104 Carmen Petrus Medical Physician Assistant · Anaheim, CA NPI 1467458455 Associated Gastroenterology Medical Group Specialist · Anaheim, CA NPI 1326044967 Kevin Kuettel Specialist · Anaheim, CA NPI 1740286384 Agmg Endoscopy Center A General Partnership Ambulatory Surgical Clinic/Center · Anaheim, CA NPI 1104822808 Joel Lester Medical Oncology Physician · Anaheim, CA NPI 1609873298 Marcelino Arenas Family Medicine Physician · Anaheim, CA NPI 1184622862 Mahaveer Khemka Specialist · Anaheim, CA NPI 1568449965

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-01-14.