Dennis Riff, M.D.
NPI 1922004662 · Specialist · Anaheim, CA
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Dennis Riff, M.D. is a Specialist provider in Anaheim, CA (NPI 1922004662).
Provider details
- NPI number
- 1922004662
- Entity type
- Individual
- Primary specialty
- SpecialistOther Service Providers
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- G22807 (CA)
Specialties & taxonomies
Other Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
755 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 195 | $138 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 170 | $122 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 114 | $134 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 69 | $179 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 49 | $98 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 42 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Pantoprazole Sodium | 322 | 129 |
| Omeprazole | 320 | 122 |
| Sodium, Potassium,mag Sulfatesbrand: Sod Sulf-Potass Sulf-Mag Sulf | 259 | 251 |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-G | 108 | 107 |
| Famotidine | 102 | 42 |
| Linaclotidebrand: Linzess | 95 | 29 |
| Sod Sulf/Pot Chloride/Mag Sulfbrand: Sutab |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$22,593 across 159 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-06-27
- Last updated
- 2013-01-14
Frequently asked questions
- What is Dennis Riff's NPI number?
- Dennis Riff's National Provider Identifier (NPI) is 1922004662, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Dennis Riff's specialty?
- Dennis Riff is listed in the NPPES registry with a primary specialty of Specialist (Other Service Providers).
- Where is Dennis Riff located?
- Dennis Riff's practice location on file with NPPES is 1211 W La Palma Ave, Anaheim, CA 92801-2811.
- What is Dennis Riff's phone number?
- The practice phone number listed in the NPPES registry for Dennis Riff is (714) 778-1300.
- Does Dennis Riff accept Medicare?
- Dennis Riff is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Dennis Riff's NPI active?
- Yes — Dennis Riff's NPI (1922004662) is active in the NPPES registry as of the last update on 2013-01-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.