Mary Katherine Llarena, FNP-C
Nurse Practitioner · Santa Maria, CA
Mary Katherine Llarena, FNP-C is a nurse practitioner with a practice address in Santa Maria, California, and NPI 1447793211, issued on Nov 29, 2016. Check the license (California 95005344, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Mary Katherine Llarena
- Credential
- FNP-C
- Primary taxonomy
- Nurse Practitioner 363L00000X
- License number
- 95005344 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1510 E Main St, Santa Maria, CA 93454
- Phone
- (805) 928-0610
- Enumerated
- Nov 29, 2016
- Record last updated
- Aug 24, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (805) 928-0680
- Entity
- Type 1 · individual
8 nearest nurse practitioner records → All 8,223 in California → Look up another NPI →
Also registered at 1510 E Main St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Keith Somma, M.D.Interventional Cardiology Physician1528279841
Verify Mary Katherine Llarena in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 95005344Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
95% fewer Medicare Part D claims than the average nurse practitioner in 2024
59 Medicare Part D claims for 21 beneficiaries, against an average of 1,109 among the 54,319 providers of this specialty who prescribed in Part D. Brand-name drugs were 27% of claims.
Most prescribed
- Carvedilol13 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.
Industry payments in 2024: $2,689.30
88 payments; by number, the most common kind was food and beverage; the largest payer was Amgen Inc. The 38,884 providers of this specialty with any payment received $791.64 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Mary Katherine Llarena among 8,223 nurse practitioner records in California
Mary Katherine Llarena, FNP-C is one of 8,223 nurse practitioner records with a practice address in California. 65% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 48% of them.
- NPI issued2016 · 48% of these records are older, 48% newer
- In a Medicare fileYes · 65% of these records are
- In the CMS Doctors and Clinicians fileNo · 42% of these records are
- Record last updated2018 · 45% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363L00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nurse Practitioner providers in California
There are 8,223 nurse practitioner records in California.
All 8,223 in California → Every provider in Santa Maria → Nurse Practitioner nationwide →
The 8 nurse practitioner records with the nearest ZIP codes
- Barbara Armstrong, NPSanta Maria, CA 934541598908386
- Ginger CarmichaelSanta Maria, CA 934541760974018
- Seta Nanor DarakdjianSanta Maria, CA 934541376112250
- Denise Desmond, NP,RNSanta Maria, CA 934541598779613
- Katelyn Dietz, FNPSanta Maria, CA 934541689375040
- Amanda Krepp, ENP-C, FNP-CSanta Maria, CA 934541750171179
- Victoria Morawitz, NPSanta Maria, CA 934541912932591
- Alexis Paulson, RN, APNSanta Maria, CA 934541790969046
Common questions
What is Mary Katherine Llarena, FNP-C's NPI number?
Mary Katherine Llarena, FNP-C's National Provider Identifier (NPI) is 1447793211, issued on Nov 29, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Mary Katherine Llarena, FNP-C located?
The NPPES record lists a practice address at 1510 E Main St, Santa Maria, CA, 93454. Phone: (805) 928-0610. Providers update this record themselves, so call before visiting.
How can I verify Mary Katherine Llarena, FNP-C's license?
NPPES lists California license number 95005344, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Mary Katherine Llarena, FNP-C prescribe under Medicare Part D?
In 2024, Mary Katherine Llarena, FNP-C had 59 Medicare Part D claims for 21 beneficiaries; the average among nurse practitioner prescribers was 1,109. 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.