Maria Barnwell, PA
NPI 1679529515 · Physician Assistant · Guadalupe, AZ
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Maria Barnwell, PA is a Physician Assistant provider in Guadalupe, AZ (NPI 1679529515).
Provider details
- NPI number
- 1679529515
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA
- Sex
- Female
- Sole proprietor
- No
- License
- 3805 (AZ)
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 tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
61 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. 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 does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 44 | $80 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 17 | $60 |
Typical Medicare-allowed amounts for these services range $60–$80 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 20 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Lisinopril | 76 | 21 |
| Atorvastatin Calcium | 62 | 19 |
| Amlodipine Besylate | 47 | 17 |
| Metformin Hcl | 34 | 14 |
| Levothyroxine Sodium | 29 | — |
| Losartan Potassium | 27 | — |
| Omeprazole |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-05-25
- Last updated
- 2018-03-22
Frequently asked questions
- What is Maria Barnwell's NPI number?
- Maria Barnwell's National Provider Identifier (NPI) is 1679529515, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Maria Barnwell's specialty?
- Maria Barnwell is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Maria Barnwell located?
- Maria Barnwell's practice location on file with NPPES is 5825 E Calle Guadalupe, Guadalupe, AZ 85283-2664.
- What is Maria Barnwell's phone number?
- The practice phone number listed in the NPPES registry for Maria Barnwell is (480) 344-6000.
- Does Maria Barnwell accept Medicare?
- Maria Barnwell is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Maria Barnwell's NPI active?
- Yes — Maria Barnwell's NPI (1679529515) is active in the NPPES registry as of the last update on 2018-03-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.