Patricia Thalken Lash, FNP
Family Nurse Practitioner · Costa Mesa, CA
Patricia Thalken Lash, FNP is a family nurse practitioner with a practice address in Costa Mesa, California, and NPI 1245519172, issued on Aug 9, 2011. Check the license (California 20933, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Patricia Thalken Lash
- Credential
- FNP
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License number
- 20933 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1190 Baker Street, Costa Mesa, CA 92659
- Phone
- (714) 668-2500
- Enumerated
- Aug 9, 2011
- Record last updated
- Aug 9, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (714) 668-2515
- Medicare enrollment
- Enrolled (PECOS I20111017000286); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 16,966 in California → Look up another NPI →
Verify Patricia Thalken Lash in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 20933Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
86% fewer Medicare Part D claims than the average family nurse practitioner in 2024
182 Medicare Part D claims for 142 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D. 44 claims were for opioids.
Most prescribed
- Cephalexin28 claims
- Hydrocodone-Acetaminophen22 claims
- Tramadol Hcl19 claims
- Sulfamethoxazole-Trimethoprim13 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Emergency Physicians OF Orange CountyNewport Beach, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Patricia Thalken Lash among 16,966 family nurse practitioner records in California
Patricia Thalken Lash, FNP is one of 16,966 family nurse practitioner records with a practice address in California. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 19% of them.
- NPI issued2011 · 19% of these records are older, 79% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 40% of these records are
- Graduated2011 · median 2019 among the 6,793 with a school on file
- Record last updated2011 · 42% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LF0000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
71 family nurse practitioner records list a practice address in Costa Mesa
They are 71 of the 4,286 NPPES records with a practice address in Costa Mesa, and 16,966 family nurse practitioner records in California.
All 16,966 in California → Every provider in Costa Mesa → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- Barret Bestard, NPNewport Beach, CA 926601639719750
- Clarissa Caballero, MSN, FNP-BCNewport Beach, CA 926601417486143
- Linda Clark, APRN-BCNewport Beach, CA 926601952491797
- Laura Conahan, FNPNewport Beach, CA 926601194005975
- Faziela Gandara, NPNewport Beach, CA 926581508603069
- Joanne Giron, NPNewport Beach, CA 926601710459995
- Brian Jackson, NPNewport Beach, CA 926601174080030
- Meghan Kelly, FNP-CNewport Beach, CA 926601356928568
Common questions
What is Patricia Thalken Lash, FNP's NPI number?
Patricia Thalken Lash, FNP's National Provider Identifier (NPI) is 1245519172, issued on Aug 9, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Patricia Thalken Lash, FNP located?
The NPPES record lists a practice address at 1190 Baker Street, Costa Mesa, CA, 92659. Phone: (714) 668-2500. Providers update this record themselves, so call before visiting.
How can I verify Patricia Thalken Lash, FNP's license?
NPPES lists California license number 20933, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Patricia Thalken Lash, FNP prescribe under Medicare Part D?
In 2024, Patricia Thalken Lash, FNP had 182 Medicare Part D claims for 142 beneficiaries; the average among family nurse practitioner prescribers was 1,305. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.