Barbara Armstrong, NP
NPI 1598908386 · Nurse Practitioner · Santa Maria, CA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Barbara Armstrong, NP is a Nurse Practitioner provider in Santa Maria, CA (NPI 1598908386).
Provider details
- NPI number
- 1598908386
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- NP
- Sex
- Female
- Sole proprietor
- No
- License
- NPF2403 RN343075 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
17 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 18 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 149 | 42 |
| Levothyroxine Sodium | 103 | 26 |
| Losartan Potassium | 74 | 18 |
| Amlodipine Besylate | 71 | 15 |
| Rosuvastatin Calcium | 62 | 21 |
| Lisinopril | 44 | 12 |
| Metformin Hcl |
Practice location
Mailing address
Registry dates
- Enumerated
- 2009-04-09
- Last updated
- 2009-04-09
Frequently asked questions
- What is Barbara Armstrong's NPI number?
- Barbara Armstrong's National Provider Identifier (NPI) is 1598908386, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Barbara Armstrong's specialty?
- Barbara Armstrong is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Barbara Armstrong located?
- Barbara Armstrong's practice location on file with NPPES is 821 E Chapel St, Santa Maria, CA 93454-4617.
- What is Barbara Armstrong's phone number?
- The practice phone number listed in the NPPES registry for Barbara Armstrong is (805) 925-5334.
- Does Barbara Armstrong accept Medicare?
- Barbara Armstrong is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Barbara Armstrong's NPI active?
- Yes — Barbara Armstrong's NPI (1598908386) is active in the NPPES registry as of the last update on 2009-04-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.