LINDA ADELE WARREN-WATSON, MD

NPI 1518931856, individual, Lancaster, CA, Obstetrics & Gynecology

Evidence tier

documented action, then payment

Listed on the CA Medicaid exclusion list since October 31, 2020.
Medicaid still paid claims in 16 later months, $828,250 in total.

score 96 of 100, rank 71, $828K 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	Oct 31, 2020	still open	16	Nov 2020	Jun 2022	$828K	$888K

National provider registry

From the CMS NPPES Registry, refreshed daily.

Name	LINDA ADELE WARREN-WATSON, MD (also LINDA WARREN)
Type	Individual
Status	Active
NPI issued	February 14, 2006, last updated January 29, 2016
Practice location	1729 WEST AVE J., Lancaster, CA 93534, 661-723-0270
Specialties	Obstetrics & Gynecology (207V00000X, primary, license C400790 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
T1015	Medicaid service code	$2.5M	94%	$235	$182 (top 5% from $488)	70th percentile
99213	Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more	$118K	4%	$28	$44 (top 5% from $110)	25th percentile
99212	Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	$22K	1%	$53	$28 (top 5% from $147)	82nd percentile
99214	Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	$8K	0%	$199	$60 (top 5% from $133)	too few months to rank
87491	Detection test by nucleic acid for chlamydia trachomatis, amplified probe technique	$2K	0%	$5.36	$27 (top 5% from $50)	21st percentile
87591	Detection test by nucleic acid for neisseria gonorrhoeae (gonorrhoeae bacteria), amplified probe technique	$2K	0%	$5.35	$26 (top 5% from $46)	18th percentile
81025	Urine pregnancy test	$1K	0%	$1.42	$5.49 (top 5% from $12)	23rd percentile
87661	Detection test by nucleic acid for trichomonas vaginalis (genital parasite), amplified probe technique	$975	0%	$5.21	$25 (top 5% from $41)	14th percentile

In this area

399 providers in Los Angeles County, CA carry an indicator in the public record, with $128.8M at stake between them. The most common is part of a provider network, on 347 of them, followed by paid after a public list action on 36. 52 are tier 1: documented action, then payment.

tier	provider	at stake	why
1	BURBANK PREFERRED PROVIDER MEDICAL GROUP, INC Burbank, CA, ranked 17	$67K	Listed on the Medicare revocation list since October 21, 2020. Medicaid still paid claims in 24 later months, $67,101 in total. and 1 more
1	GOLDEN STAR LABS LLC Los Angeles, CA, ranked 32	$41.0M	Adjudicated (pleaded guilty) per a Department of Justice release dated June 24, 2026. Medicaid paid $41,015,276 in the last 12 observed months.
1	MATIAS CLINICAL LABORATORY INC Baldwin Park, CA, ranked 43	$3.8M	Listed on the Medicare revocation list since August 31, 2018. Medicaid still paid claims in 44 later months, $3,846,471 in total. and 1 more
1	HEALTHSMART PACIFIC INC Long Beach, CA, ranked 52	$1.6M	Listed on the OIG exclusion list since April 20, 2021. Medicaid still paid claims in 34 later months, $1,639,221 in total.
1	SOHRAB MOSHIRI Woodland Hills, CA, ranked 82	$483K	Listed on the WA Medicaid exclusion list since January 9, 2009. Medicaid still paid claims in 83 later months, $482,999 in total.
1	QUALITY FAMILY HOSPICE CARE INC Tarzana, CA, ranked 92	$375K	Listed on the CA Medicaid exclusion list and the Medicare revocation list since July 18, 2024. Medicaid still paid claims in 4 later months, $375,479 in total.
1	MARATHON HOSPICE CARE INC. North Hollywood, CA, ranked 95	$368K	Listed on the Medicare revocation list since July 6, 2024. Medicaid still paid claims in 4 later months, $367,866 in total.
1	SOFT TOUCH HOSPICE, INC Glendale, CA, ranked 106	$247K	Listed on the Medicare revocation list and the CA Medicaid exclusion list since August 17, 2024. Medicaid still paid claims in 2 later months, $246,792 in total.

All 399 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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