Chen, William

Chen, William was paid $28K by Medicaid between Jan 2018 and Feb 2020, across 6 billing codes. Its largest line is 99213, doctor's office visit, returning patient (routine) — 79% of everything it billed.

33Billing provider infoCHEN, WILLIAM
SAN PABLO, CA 94806

33aNPI1851498372assigned 09/19/2006

33bProvider typeAllergy & Immunology Physician

28Total paid$28K

24GClaims1,223

24DCodes billed6

24AFirst – last monthJan 2018 – Feb 2020

Compared with peers

Next to other Allergy & Immunology Physician providers in California

Rank by total paid#40 of 68

Median peer was paid$64K

This provider vs. median0.4×

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	1,179	$27K
2020	44	$1K

Box 24 · Service lines

What it billed for

Code	Service	Share	Claims	Bene. records	Paid
99213	Doctor's office visit, returning patient (routine)Office or other outpatient visit for the evaluation and management of an established patient, low complexity	79%	876	831	$22K
H0049	Alcohol and/or drug screening	7.7%	85	85	$2K
99212	Office or other outpatient visit for the evaluation and management of an established patient, straightforward	7.2%	164	164	$2K
90688		3.6%	43	43	$1K
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	1.7%	12	12	$472.56
90471	Immunization administration (includes percutaneous, intradermal, subcutaneous, or intramuscular injections), 1 vaccine	<1%	43	43	$201.24

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.