Doctor profile · Federal record
Dr. Ralph Peterson, MD
Gastroenterology Physician (CMS: Gastroenterology) · Oakland, CA
- NPI 1851311104
- Accepts Medicare
- MIPS 30.0 / 100 · 2023
- 48 yrs in practice
- Male
- Solo practice
- No sanctions
Practice & contact
- Primary practice
-
10520 Macarthur Blvd
Oakland, CA 946055248
(510) 562-7467
fax (510) 635-9025
Credentials & registration
- NPI registered
- July 2006 — 20 yrs on file
- Profile last updated
- December 2, 2011
- Year of graduation
- 1978 — 48 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
- State license (1)
- California #G49099
- Medicaid
- CA #00G490990
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1851311104. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
979
Distinct HCPCS
6
Medicare allowed
$148,183
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 376 | 214 | $127 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 330 | 173 | $80 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 98 | 98 | $194 | |
99442 |
Telephone medical discussion with physician, 11-20 minutes | 82 | 56 | $74 | |
45380 |
Biopsy of large bowel using a flexible endoscope | 66 | 66 | $550 | |
43239 |
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 27 | 26 | $469 |
In context: peer comparison
Among 3 peers in Oakland Gastroenterology Physician, average services per provider: 80. This provider delivers 12× the peer median.Open Payments
Industry payments received
All-time total
$10,244
Transactions
32
Manufacturers
6
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Gilead Sciences, INC. | 16 | $9,859.91 | |
| Salix Pharmaceuticals, A Division of Bausch Health US, LLC | 5 | $113.78 | |
| Madrigal Pharmaceuticals | 4 | $103.96 | |
| Abbvie INC. | 4 | $85.25 | |
| Phathom Pharmaceuticals, INC. | 2 | $51.65 | |
| ViiV Healthcare Company | 1 | $29.05 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
1,240
Patients
364
Total drug cost
$249,030
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Famotidine | Generic | 308 | 88 | $5,438 |
| Dicyclomine Hcl | Generic | 190 | 64 | $3,822 |
| Pantoprazole Sodium | Generic | 144 | 46 | $2,621 |
| Linzess (Linaclotide) | Brand | 115 | 30 | $67,288 |
| Omeprazole | Generic | 90 | 30 | $1,339 |
| Dexlansoprazole Dr (Dexlansoprazole) | Brand | 82 | 19 | $28,574 |
| Gavilyte-G (Peg3350/Sod Sulf,Bicarb,Cl/Kcl) | Brand | 61 | 58 | $1,094 |
| Hydrocortisone | Generic | 59 | 18 | $1,154 |
| Vemlidy (Tenofovir Alafenamide) | Brand | 44 | 0 | $65,930 |
| Esomeprazole Magnesium | Generic | 39 | 11 | $1,254 |
Frequently asked questions
What is Dr. Ralph Peterson's medical specialty?
Dr. Ralph Peterson practices Gastroenterology Physician in Oakland, CA.
Where does Dr. Ralph Peterson practice?
Dr. Ralph Peterson practices at 10520 Macarthur Blvd, Oakland, CA 946055248. Office phone: 5105627467.
What is Dr. Ralph Peterson's NPI?
Dr. Ralph Peterson's National Provider Identifier (NPI) is 1851311104, issued by NPPES.
Does Dr. Ralph Peterson accept Medicare assignment?
Yes. Dr. Ralph Peterson accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Ralph Peterson commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Established patient office or other outpatient visit (HCPCS 99213); New patient office or other outpatient visit (HCPCS 99204). Source: CMS Medicare Physician & Other Practitioners file.