Doctor profile · Federal record
Dr. David Chapman, M.D.
Gastroenterology Physician · Yorba Linda, CA
- NPI 1053321943
- 20 yrs on file
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
16671 Yorba Linda Blvd, Ste 200
Yorba Linda, CA 928862046
(714) 996-3700
fax (714) 961-7839
Credentials & registration
- NPI registered
- August 2006 — 20 yrs on file
- Profile last updated
- June 13, 2016
- Specialty taxonomy
- 207RG0100X — NUCC code
- State license (1)
- California #G36066
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1053321943. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
308
Distinct HCPCS
8
Medicare allowed
$45,246
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 102 | 69 | $141 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 46 | 41 | $99 | |
43239 |
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 34 | 34 | $84 | |
45385 |
Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 34 | 34 | $270 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 34 | 34 | $183 | |
99203 |
New patient office or other outpatient visit, 30-44 minutes | 28 | 28 | $124 | |
45380 |
Biopsy of large bowel using a flexible endoscope | 19 | 18 | $131 | |
45378 |
Diagnostic exam of large bowel using a flexible endoscope | 11 | 11 | $196 |
In context: peer comparison
Among 5 peers in Yorba Linda Gastroenterology Physician, average services per provider: 46. This provider delivers 6.7× the peer median.Open Payments
Industry payments received
All-time total
$291
Transactions
2
Manufacturers
2
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Ardelyx, INC. | 1 | $145.66 | |
| Janssen Biotech, INC. | 1 | $145.66 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
177
Patients
24
Total drug cost
$23,896
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Omeprazole | Generic | 59 | 24 | $1,125 |
| Pantoprazole Sodium | Generic | 35 | 0 | $592 |
| Esomeprazole Magnesium | Generic | 25 | 0 | $2,595 |
| Famotidine | Generic | 18 | 0 | $496 |
| Mercaptopurine | Generic | 15 | 0 | $3,994 |
| Linzess (Linaclotide) | Brand | 13 | 0 | $14,744 |
| Lansoprazole | Generic | 12 | 0 | $350 |
Frequently asked questions
What is Dr. David Chapman's medical specialty?
Dr. David Chapman practices Gastroenterology Physician in Yorba Linda, CA.
Where does Dr. David Chapman practice?
Dr. David Chapman practices at 16671 Yorba Linda Blvd, Yorba Linda, CA 928862046. Office phone: 7149963700.
What is Dr. David Chapman's NPI?
Dr. David Chapman's National Provider Identifier (NPI) is 1053321943, issued by NPPES.
What procedures does Dr. David Chapman 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); Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (HCPCS 43239). Source: CMS Medicare Physician & Other Practitioners file.