Lia Armstrong Wystrach, BSN, RN, MN, FNP-C
Family Nurse Practitioner · Larkspur, CA
Lia Armstrong Wystrach, BSN, RN, MN, FNP-C is a family nurse practitioner with a practice address in Larkspur, California, and NPI 1326692708, issued on Jul 24, 2019. Check the license (California 95035870, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Lia Armstrong Wystrach
- Credential
- BSN, RN, MN, FNP-C
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License numbers
- 95035870 CA
201906215NP-PP OR
Self-reported in NPPES; status is on the state search - Practice location
- 1100 Larkspur Landing Cir Ste 10, Larkspur, CA 94939
- Phone
- (415) 924-1214
- Enumerated
- Jul 24, 2019
- Record last updated
- Jul 21, 2025
- Medicare enrollment
- Enrolled (PECOS I20250804002949); may accept Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 16,966 in California → Look up another NPI →
Also registered at 1100 Larkspur Landing Cir Ste 10
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Injil Abubakar, MDFamily Medicine Physician1013095041
- Saba Bagewadi, M.D.Pediatrics Physician1588059059
- Anjuli Brighton, MDPulmonary Disease Physician1407110588
- Robert DorisInternal Medicine Physician1528647096
- Grace Fong, D.O.Family Medicine Physician1952559585
- Maria Garcia-Ball, RNFamily Nurse Practitioner1972987519
Verify Lia Armstrong Wystrach in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 95035870Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.9 times the Medicare Part D claims of the average family nurse practitioner in 2024
5,066 Medicare Part D claims for 366 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 40 claims were for opioids.
Most prescribed
- Atorvastatin Calcium419 claims
- Losartan Potassium289 claims
- Levothyroxine Sodium251 claims
- Lisinopril197 claims
- Amlodipine Besylate178 claims
- Hydrochlorothiazide132 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.
The MIPS final score for 2023 (Medicare payment program): 97.8 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Regents Univ OF California UcsfSan Francisco, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Lia Armstrong Wystrach among 16,966 family nurse practitioner records in California
Lia Armstrong Wystrach, BSN, RN, MN, FNP-C 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 2019, is newer than 50% of them.
- NPI issued2019 · 50% of these records are older, 44% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 40% of these records are
- Graduated2019 · median 2019 among the 6,793 with a school on file
- Record last updated2025 · 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).
7 family nurse practitioner records list a practice address in Larkspur
They are 7 of the 291 NPPES records with a practice address in Larkspur, and 16,966 family nurse practitioner records in California.
All 16,966 in California → Every provider in Larkspur → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- Mary FordLarkspur, CA 949391922599802
- Maria Garcia-Ball, RNLarkspur, CA 949391972987519
- Deborah Leal, N.P-FLarkspur, CA 949391306155908
- Elaine Luu, FNP, CNS, RNLarkspur, CA 949391194845651
- Laura Stuart, FNPLarkspur, CA 949391871798769
- Alyssa Thompson-Tucker, FNPLarkspur, CA 949391588161442
- Susan Chappell, RN,MSN,FNP-BCMill Valley, CA 949411528493822
- Ginger Gakunga, APNMill Valley, CA 949411760790034
Common questions
What is Lia Armstrong Wystrach, BSN, RN, MN, FNP-C's NPI number?
Lia Armstrong Wystrach, BSN, RN, MN, FNP-C's National Provider Identifier (NPI) is 1326692708, issued on Jul 24, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Lia Armstrong Wystrach, BSN, RN, MN, FNP-C located?
The NPPES record lists a practice address at 1100 Larkspur Landing Cir Ste 10, Larkspur, CA, 94939. Phone: (415) 924-1214. Providers update this record themselves, so call before visiting.
How can I verify Lia Armstrong Wystrach, BSN, RN, MN, FNP-C's license?
NPPES lists California license number 95035870, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Lia Armstrong Wystrach, BSN, RN, MN, FNP-C prescribe under Medicare Part D?
In 2024, Lia Armstrong Wystrach, BSN, RN, MN, FNP-C had 5,066 Medicare Part D claims for 366 beneficiaries; the average among family nurse practitioner prescribers was 1,305. Part D covers Medicare prescriptions only.
What is Lia Armstrong Wystrach, BSN, RN, MN, FNP-C's MIPS final score?
The 2023 MIPS final score is 97.8 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.