Barbara Greenwell, APRN
NPI 1942637434 · Adult Health Nurse Practitioner · Irvine, CA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Barbara Greenwell, APRN is a Adult Health Nurse Practitioner provider in Irvine, CA (NPI 1942637434).
Provider details
- NPI number
- 1942637434
- Entity type
- Individual
- Primary specialty
- Adult Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- APRN
- Sex
- Female
- Sole proprietor
- No
- License
- 95016517 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
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
12 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
73 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 | 60 | $97 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 13 | $165 |
Typical Medicare-allowed amounts for these services range $97–$165 (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 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Oxycodone Hcl | 36 | 20 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 31 | 19 |
| Lorazepam | 17 | — |
| Fentanyl | 17 | — |
| Gabapentin | 14 | — |
| Pregabalin | 14 | — |
| Hydromorphone Hcl |
Practice location
Mailing address
Additional practice locations (1)
- 1601 Avocado AveNewport Beach, CA 92660-7798Phone: (949) 763-2204Fax: (949) 536-8036
Registry dates
- Enumerated
- 2013-09-30
- Last updated
- 2022-06-28
- Certified
- 2022-06-28
Frequently asked questions
- What is Barbara Greenwell's NPI number?
- Barbara Greenwell's National Provider Identifier (NPI) is 1942637434, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Barbara Greenwell's specialty?
- Barbara Greenwell is listed in the NPPES registry with a primary specialty of Adult Health Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Barbara Greenwell located?
- Barbara Greenwell's practice location on file with NPPES is 1000 Fivepoint, Irvine, CA 92618-2377.
- What is Barbara Greenwell's phone number?
- The practice phone number listed in the NPPES registry for Barbara Greenwell is (949) 671-4673.
- Does Barbara Greenwell accept Medicare?
- Barbara Greenwell is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Barbara Greenwell's NPI active?
- Yes — Barbara Greenwell's NPI (1942637434) is active in the NPPES registry as of the last update on 2022-06-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.