Physician
Zahn, Chester
Zahn, Chester was paid $176K by Medicaid between Jan 2018 and Nov 2024, across 13 billing codes. Its largest line is 99204, doctor's office visit, new patient (more involved) — 28% of everything it billed.
33Billing provider infoZAHN, CHESTER
SAN GABRIEL, CA 91776
SAN GABRIEL, CA 91776
33aNPI1639146442assigned 03/01/2006
33bProvider typeGastroenterology Physician
28Total paid$176K
24GClaims4,813
24DCodes billed13
24AFirst – last monthJan 2018 – Nov 2024
Compared with peers
Next to other Gastroenterology Physician providers in California
Rank by total paid#130 of 363
Median peer was paid$55K
This provider vs. median3.2×
Peers share this provider's primary NPPES type and state. Size alone says nothing about billing quality: a big agency or a hospital system is expected to sit far above the median.
Box 24A · Dates of service
Paid by month
Paid that monthNov–Dec 2024: claims still arriving when the file was cut, so these months run low for every provider
By year, as a table
| Year | Claims | Paid | |
|---|---|---|---|
| 2018 | 499 | $14K | |
| 2019 | 603 | $23K | |
| 2020 | 384 | $15K | |
| 2021 | 491 | $22K | |
| 2022 | 614 | $29K | |
| 2023 | 1,111 | $40K | |
| 2024incomplete | 1,111 | $33K |
Box 24 · Service lines
What it billed for
| Code | Service | Share | Claims | Bene. records | Paid |
|---|---|---|---|---|---|
| 99204 | Doctor's office visit, new patient (more involved)Office or other outpatient visit for the evaluation and management of a new patient, moderate complexity | 28% | 823 | 822 | $49K |
| 99203 | Doctor's office visit, new patient (routine)Office or other outpatient visit for the evaluation and management of a new patient, low complexity | 18% | 911 | 911 | $32K |
| 99213 | Doctor's office visit, returning patient (routine)Office or other outpatient visit for the evaluation and management of an established patient, low complexity | 12% | 1,454 | 1,277 | $22K |
| 99215 | Doctor's office visit, returning patient (complex)Prolong outpt/office vis | 8.9% | 225 | 217 | $16K |
| 99222 | Initial hospital care, per day, moderate complexity | 8.5% | 318 | 309 | $15K |
| 43239 | Esophagogastroduodenoscopy, flexible, transoral; with biopsy, single or multiple | 7.7% | 174 | 174 | $13K |
| 99214 | Doctor's office visit, returning patient (more involved)Office or other outpatient visit for the evaluation and management of an established patient, moderate complexity | 6.1% | 501 | 481 | $11K |
| 45378 | Colonoscopy, flexible; diagnostic, including collection of specimen(s) | 5.2% | 88 | 88 | $9K |
| 99231 | Subsequent hospital care, per day, straightforward or low complexity | 2.5% | 216 | 132 | $4K |
| 45385 | Colonoscopy, flexible; with removal of tumor(s), polyp(s), or other lesion(s) | 1.2% | 12 | 12 | $2K |
| 99232 | Hospital visit by a doctor, follow-up daySubsequent hospital care, per day, moderate complexity | <1% | 46 | 44 | $1K |
| 99223 | Prolong inpt eval add15 m | <1% | 15 | 13 | $777.14 |
1 more codes
| 99233 | Hospital visit by a doctor, follow-up day (complex) | <1% | 30 | $732.80 |
Claims and beneficiary counts add up across code × month rows, so one patient seen every month counts many times. Rows with fewer than 12 claims are suppressed by HHS, so small lines can be missing.