Barbara Armstrong, NP
Nurse Practitioner · Santa Maria, CA
Barbara Armstrong, NP is a nurse practitioner with a practice address in Santa Maria, California, and NPI 1598908386, issued on Apr 9, 2009. Check the license (California NPF2403 RN343075, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Barbara Armstrong
- Credential
- NP
- Primary taxonomy
- Nurse Practitioner 363L00000X
- License number
- NPF2403 RN343075 CA
Self-reported in NPPES; status is on the state search - Practice location
- 821 E Chapel St, Santa Maria, CA 93454
- Phone
- (805) 925-5334
- Enumerated
- Apr 9, 2009
- Record last updated
- Apr 9, 2009 (not updated in 17 years: call before relying on the address or phone)
- Fax
- (805) 922-5923
- Entity
- Type 1 · individual
8 nearest nurse practitioner records → All 8,223 in California → Look up another NPI →
Also registered at 821 E Chapel St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sonia Parker, MSN, FNPFamily Nurse Practitioner1083035562
- Michael Schrager, M.DFamily Medicine Physician1437153996
Verify Barbara Armstrong in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license NPF2403 RN343075Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
1% fewer Medicare Part D claims than the average nurse practitioner in 2024
1,095 Medicare Part D claims for 130 beneficiaries, against an average of 1,109 among the 54,319 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium149 claims
- Levothyroxine Sodium103 claims
- Losartan Potassium74 claims
- Amlodipine Besylate71 claims
- Rosuvastatin Calcium62 claims
- Lisinopril44 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.
Barbara Armstrong among 8,223 nurse practitioner records in California
Barbara Armstrong, NP 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 2009, is newer than 30% of them.
- NPI issued2009 · 30% of these records are older, 68% newer
- In a Medicare fileYes · 65% of these records are
- In the CMS Doctors and Clinicians fileNo · 42% of these records are
- Record last updated2009 · 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
- 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
- Mary Katherine Llarena, FNP-CSanta Maria, CA 934541447793211
- Victoria Morawitz, NPSanta Maria, CA 934541912932591
- Alexis Paulson, RN, APNSanta Maria, CA 934541790969046
Common questions
What is Barbara Armstrong, NP's NPI number?
Barbara Armstrong, NP's National Provider Identifier (NPI) is 1598908386, issued on Apr 9, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Barbara Armstrong, NP located?
The NPPES record lists a practice address at 821 E Chapel St, Santa Maria, CA, 93454. Phone: (805) 925-5334. Providers update this record themselves, so call before visiting.
How can I verify Barbara Armstrong, NP's license?
NPPES lists California license number NPF2403 RN343075, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Barbara Armstrong, NP prescribe under Medicare Part D?
In 2024, Barbara Armstrong, NP had 1,095 Medicare Part D claims for 130 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.