Chien, Oscar

Chien, Oscar was paid $204K by Medicaid between Jan 2018 and Sep 2024, across 18 billing codes. Its largest line is 99310, Prolong nursin fac eval 15m — 30% of everything it billed.

33Billing provider infoCHIEN, OSCAR
SAN GABRIEL, CA 91776

33aNPI1679675904assigned 09/05/2006

33bProvider typeGeriatric Medicine (Internal Medicine) Physician

28Total paid$204K

24GClaims11,376

24DCodes billed18

24AFirst – last monthJan 2018 – Sep 2024

Compared with peers

Next to other Geriatric Medicine (Internal Medicine) Physician providers in California

Rank by total paid#21 of 86

Median peer was paid$14K

This provider vs. median15×

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	3,086	$30K
2019	2,127	$44K
2020	1,594	$43K
2021	621	$18K
2022	1,413	$43K
2023	1,597	$21K
2024incomplete	938	$5K

Box 24 · Service lines

What it billed for

Code	Service	Share	Claims	Bene. records	Paid
99310	Prolong nursin fac eval 15m	30%	2,690	2,159	$61K
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	19%	2,985	2,794	$39K
99232	Hospital visit by a doctor, follow-up daySubsequent hospital care, per day, moderate complexity	16%	3,366	445	$33K
99223	Prolong inpt eval add15 m	13%	341	299	$27K
99443		11%	493	490	$22K
99442		5.5%	299	268	$11K
99213	Doctor's office visit, returning patient (routine)Office or other outpatient visit for the evaluation and management of an established patient, low complexity	2.4%	355	317	$5K
99490	Ccm add 20min	<1%	106	106	$2K
G0506	Comprehensive assessment of and care planning for patients requiring chronic care management services (list separately in addition to primary monthly care management service)	<1%	66	66	$1K
99239	Hospital discharge day management, more than 30 minutes	<1%	197	173	$1K
99306	Prolong nursin fac eval 15m	<1%	27	27	$596.77
99497		<1%	82	67	$191.75

6 more codes

90674		<1%	66	$100.00
G0438	Annual wellness visit; includes a personalized prevention plan of service (pps), initial visit	<1%	44	$73.15
G0008	Administration of influenza virus vaccine	<1%	82	$40.00
G0442	Annual alcohol misuse screening, 5 to 15 minutes	<1%	81	$5.70
G0446	Annual, face-to-face intensive behavioral therapy for cardiovascular disease, individual, 15 minutes	<1%	83	$3.04
90756		0%	13	$0.00

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.