CHIVANO CHHIENG, M.D.

NPI 1336207505, individual, San Diego, CA, Family Medicine

Evidence tier

documented action, then payment

Listed on the CA Medicaid exclusion list since July 14, 2020.
Medicaid still paid claims in 12 later months, $23,669 in total.

score 94 of 100, rank 231, $24K at stake

Paid after the action

Months in which Medicaid paid claims for this provider after a public action that should have triggered a screening check. This is a record of payments, not a determination that they were improper.

list	identity check	action date	window closed	months paid after	first	last	paid after	12 months before
CA Medicaid exclusion list ca medi-cal suspended & ineligible provider list (july 2026)	Exact NPI, name verified	Jul 14, 2020	still open	12	Dec 2020	Aug 2024	$24K	$0

National provider registry

From the CMS NPPES Registry, refreshed daily.

Name	CHIVANO CHHIENG, M.D.
Type	Individual
Status	Active
NPI issued	December 4, 2006, last updated June 17, 2013
Practice location	300 FIR ST, San Diego, CA 92101-2327, 619-499-2777
Specialties	Family Medicine (207Q00000X, primary, license A71847 CA)

Procedures billed

The specific codes behind the dollars. Medicaid figures come from T-MSIS (2018 to 2024) and are compared with every other provider billing the same code; Medicare figures come from the 2024 physician and supplier file and compare this provider's submitted charge with what Medicare allowed, against the usual ratio for that code.

Medicaid, largest codes

code	what it is	paid	share	per patient-month	typical	rank among providers
99203	New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	$11K	43%	$128	$67 (top 5% from $121)	96th percentile
99213	Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more	$5K	21%	$100	$44 (top 5% from $110)	too few months to rank
99283	Emergency department visit with low level of medical decision making	$5K	20%	$41	$60 (top 5% from $193)	24th percentile
99282	Emergency department visit with straightforward medical decision making	$4K	15%	$38	$71 (top 5% from $204)	too few months to rank
99284	Emergency department visit with moderate level of medical decision making	$354	1%	$29	$86 (top 5% from $224)	too few months to rank

Medicare Part B 2024, largest codes

code	what it is	services	beneficiaries	paid	submitted per service	allowed per service	charge to allowed	usual for this code
99283	Emergency department visit with low level of medical decision making	31	28	$1K	$442	$67	6.6x	5.8x (90th percentile 10.9x)
99282	Emergency department visit with straightforward medical decision making	33	23	$950	$179	$40	4.4x	4.5x (90th percentile 10.9x)
99281	Emergency department visit for problem that may not require health care professional	25	23	$184	$139	$11	12.6x	8.9x (90th percentile 16.1x)

A submitted charge many times the allowed amount is common and lawful; it matters when it is far above what other providers submit for the same code.

In this area

141 providers in San Diego County, CA carry an indicator in the public record, with $221.8M at stake between them. The most common is more hours than a day holds, on 83 of them, followed by part of a provider network on 43. 11 are tier 1: documented action, then payment.

tier	provider	at stake	why
1	BRENTON WYNN National City, CA, ranked 19	$52K	Listed on the CA Medicaid exclusion list and the Medicare revocation list since May 23, 2022. Medicaid still paid claims in 6 later months, $51,770 in total. and 1 more
1	MICHAEL I KELLER M.D. INC San Diego, CA, ranked 124	$141K	Listed on the CA Medicaid exclusion list since December 10, 2020. Medicaid still paid claims in 18 later months, $141,240 in total.
1	BRENTON D. WYNN, MD INC National City, CA, ranked 135	$125K	Listed on the CA Medicaid exclusion list since May 23, 2022. Medicaid still paid claims in 27 later months, $125,367 in total.
1	BRUCE BAKER Poway, CA, ranked 144	$107K	Listed on the CA Medicaid exclusion list since July 13, 2020. Medicaid still paid claims in 3 later months, $106,617 in total.
1	KYUNG BOEN San Marcos, CA, ranked 191	$50K	Listed on the WA Medicaid exclusion list since April 7, 2017. Medicaid still paid claims in 16 later months, $50,384 in total.
1	ROOZBEH BADII San Diego, CA, ranked 199	$45K	Listed on the OIG exclusion list and the NY Medicaid exclusion list and the CA Medicaid exclusion list since February 15, 2018. Medicaid still paid claims in 15 later months, $44,839 in total.
1	JOHN QIAN San Diego, CA, ranked 232	$23K	Listed on the CA Medicaid exclusion list since February 11, 2022. Medicaid still paid claims in 5 later months, $23,392 in total. and 3 more
1	CHRISTOPHER HOLT San Diego, CA, ranked 350	$3K	Listed on the CA Medicaid exclusion list since June 29, 2021. Medicaid still paid claims in 3 later months, $2,891 in total.

All 141 in CA

Recent enforcement in CA

All releases

Department of Justice and HHS-OIG releases for this state, newest first. Each opens in a new tab.

DOJPleaded guiltyAug 27, 2026

Anaheim Woman Pleads Guilty to Submitting More Than $2.2 Million in Fraudulent Hospice Care Claims to Medicare

Galbraith submitted approximately $2,266,694 in claims to Medicare for hospice services for beneficiaries who did not have a terminal illness with a life expectancy of six months or less, and Medicare paid her company approximately $2,140,606.

DOJCivil settlementAug 26, 2026

DermTech Inc. to Pay Up to $5M to Resolve Allegations It Submitted False Claims to Medicare for Unreliable Skin Cancer Tests

DermTech Inc. submitted claims to Medicare for skin cancer tests conducted with an unvalidated positive control range and for tests lacking sufficient patient RNA, and did not retract results or adequately refund Medicare.

DOJCivil settlementAug 26, 2026

DermTech Inc. to Pay Up to $5M to Resolve Allegations It Submitted False Claims to Medicare for Unreliable Skin Cancer Tests

DermTech Inc. billed Medicare for skin cancer tests conducted using an unvalidated positive control range and for tests with insufficient patient RNA, and did not retract the results or adequately refund Medicare.

DOJCivil settlementAug 24, 2026

Medicare Advantage Provider Monogram Health Agrees to Pay $2.4 Million to Settle False Claims Act Lawsuit

Monogram knowingly submitted diagnosis codes in four HCCs that were not clinically accurate, not supported by medical record documentation, and/or did not require or affect patient care, inflating Medicare Advantage beneficiaries' risk scores and causing CMS to make higher capitated payments to Medicare Advantage Organizations.

DOJCivil settlementAug 24, 2026

Medicare Advantage Provider Monogram Health Agrees to Pay $2.4M to Settle False Claims Act Suit

Monogram Health knowingly submitted diagnosis codes within four HCCs that were not clinically accurate, not supported by medical record documentation, and/or did not require or affect patient care, inflating Medicare Advantage beneficiaries' risk scores and causing CMS to make higher capitated payments to MAOs.

Referral packet

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