Doctor profile · Federal record
Dr. Dennis Riff, M.D.
Specialist (CMS: Gastroenterology) · Anaheim, CA
- NPI 1922004662
- Accepts Medicare
- MIPS 25.4 / 100 · 2023
- 55 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
1211 W la Palma Ave, Ste 306
Anaheim, CA 928012811
(714) 778-1300
fax (714) 778-0303
Credentials & registration
- NPI registered
- June 2005 — 21 yrs on file
- Profile last updated
- January 14, 2013
- Year of graduation
- 1971 — 55 yrs since
- Specialty taxonomy
- 174400000X — NUCC code
- State license (1)
- California #G22807
- Medicaid
- CA #ZZZ83646Z
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1922004662. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
9,707
Distinct HCPCS
10
Medicare allowed
$221,572
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
J1306 |
Injection, inclisiran, 1 mg | 8,804 | 22 | $12 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 263 | 154 | $138 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 163 | 153 | $137 | |
99233 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 152 | 99 | $125 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 92 | 92 | $180 | |
43239 |
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 52 | 52 | $102 | |
96372 |
Injection of drug or substance under skin or into muscle | 39 | 25 | $16 | |
99231 |
Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes | 28 | 22 | $52 | |
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 25 | 23 | $187 | |
45380 |
Biopsy of large bowel using a flexible endoscope | 22 | 21 | $139 |
In context: peer comparison
Among 9 peers in Anaheim Specialist, average services per provider: 203. This provider delivers 48× the peer median.Open Payments
Industry payments received
All-time total
$22,593
Transactions
153
Manufacturers
15
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Phathom Pharmaceuticals, INC. | 39 | $17,809.90 | |
| Olympus America INC. | 1 | $2,706.68 | |
| Abbvie INC. | 33 | $529.64 | |
| Ardelyx, INC. | 12 | $272.91 | |
| Janssen Biotech, INC. | 9 | $238.30 | |
| Takeda Pharmaceuticals U.S.A., INC. | 24 | $210.14 | |
| Pfizer INC. | 10 | $153.73 | |
| Gilead Sciences, INC. | 4 | $131.55 | |
| Salix Pharmaceuticals, A Division of Bausch Health US, LLC | 4 | $88.58 | |
| Madrigal Pharmaceuticals | 6 | $87.82 | |
| Genzyme Corporation | 3 | $62.73 | |
| RedHill Biopharma INC. | 2 | $54.23 | |
| Lilly USA, LLC | 2 | $43.95 | |
| Celgene Corporation | 2 | $43.02 | |
| Organon LLC | 2 | $32.83 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
1,360
Patients
716
Total drug cost
$169,174
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Sod Sulf-Potass Sulf-Mag Sulf (Sodium, Potassium,Mag Sulfates) | Brand | 298 | 296 | $22,844 |
| Pantoprazole Sodium | Generic | 266 | 106 | $4,612 |
| Omeprazole | Generic | 243 | 95 | $4,615 |
| Famotidine | Generic | 104 | 38 | $2,215 |
| Gavilyte-G (Peg3350/Sod Sulf,Bicarb,Cl/Kcl) | Brand | 96 | 96 | $1,509 |
| Linzess (Linaclotide) | Brand | 96 | 26 | $60,612 |
| Zolpidem Tartrate | Generic | 43 | 0 | $529 |
| Atorvastatin Calcium | Generic | 30 | 11 | $793 |
| Gavilyte-C (Peg3350/Sod Sulf,Bicarb,Cl/Kcl) | Brand | 30 | 29 | $483 |
| Lisinopril | Generic | 28 | 0 | $322 |
Frequently asked questions
What is Dr. Dennis Riff's medical specialty?
Dr. Dennis Riff practices Specialist in Anaheim, CA.
Where does Dr. Dennis Riff practice?
Dr. Dennis Riff practices at 1211 W la Palma Ave, Anaheim, CA 928012811. Office phone: 7147781300.
What is Dr. Dennis Riff's NPI?
Dr. Dennis Riff's National Provider Identifier (NPI) is 1922004662, issued by NPPES.
Does Dr. Dennis Riff accept Medicare assignment?
Yes. Dr. Dennis Riff accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Dennis Riff commonly perform?
Top Medicare-reported procedures in 2023: Injection, inclisiran, 1 mg (HCPCS J1306); Established patient office or other outpatient visit (HCPCS 99214); Initial hospital care with straightforward or low-level medical decision making (HCPCS 99222). Source: CMS Medicare Physician & Other Practitioners file.