NPI registry status
Active
2026 NPPES data Nurse Practitioner NPI 1184679805 NP
Verify on CMS → Janelle Warren, NP
Nurse Practitioner in Loma Linda, California.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 87,700 in Nurse Practitioner, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
404
Medicare Part D claims · 156 beneficiaries · Nurse Practitioner avg: 1K
Generic prescribing
95%
generic claims · 5% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Janelle Warren, NP filed 404 Medicare Part D claims in 2023 as a Nurse Practitioner in Loma Linda, California, prescribing 95% generic.
- 404
- Part D claims, 2023
- 95%
- generic prescribing
- ≥62nd
- pct by Part D claim volume (lower-bound band)
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
Janelle Warren, NP's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
404 ≥ 62nd percentile 62% of 1,370,886 prescribers are in lower value bands
Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2023
What does the federal data show about Janelle Warren, NP?
Quality data not reportedPrimary specialty
Nurse Practitioner
Medicare Part D claims
404 63% vs specialty avg
Specialty distribution in California
How Nurse Practitioner compares to other specialties among California providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Nurse Practitioner. Verify directly:
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Janelle Warren, NP appears in the CMS NPPES registry as a Nurse Practitioner provider holding NP credentials at 11234 ANDERSON ST, Loma Linda, CA, 92354, with a listed phone of (909) 558-8514. NPI 1184679805 was issued on 05/23/2006.
Medicare Part D records for calendar year 2023 show 404 prescription claims written by this provider, covering 156 Medicare beneficiaries and totaling roughly $14K in drug spend, split 5% brand-name and 95% generic by claim count, with an opioid prescribing rate of 23.0%.
Nurse Practitioner is a high-volume specialty nationwide, with 87,700 enrolled providers across 56 states and an average of 1,084 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline.
Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist, always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.
Practice Address
Provider Details
| NPI | 1184679805 |
|---|---|
| Specialty | Nurse Practitioner |
| Credentials | NP |
| Gender | Female |
| NPI Issued | 05/23/2006 |
License & disciplinary context - California MBC 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~150K California medical licensees in 2023 - they are NOT specific to Janelle Warren, NP. To verify Janelle Warren, NP's current license status, search the MBC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
576
Total board actions, California 2023
Across 556 cases
3.84
Actions per 1,000 licensees
California statewide rate
probation
Most common action type
186 cases
MBC publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the California disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Generic-heavy
Janelle Warren, NP - brand share 5.0%
Nurse Practitioner average
5% brand-name claims vs 95% generic, on 404 2023 Medicare Part D claims.
The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
404
Total Claims
$14K
Total Drug Cost
156
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 417
- Total Day Supply
- 4,743
- Brand vs Generic
- 5% brand / 95% generic
- Brand Drug Cost
- $7K
- Generic Drug Cost
- $7K
- Opioid Claims
- 93 (23.0% rate)
- Antibiotic Claims
- 120
Patient Demographics
- Average Patient Age
- 71.3 years
- Avg HCC Risk Score
- 1.97
- Gender Split
- 31% female / 69% male
- Age Distribution
- <65: 21, 65-74: 85, 75-84: 36, 85+: 14
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Janelle Warren, NP prescribes most
Top Medicare Part D drugs by claim count, 2023
- Methocarbamol
Methocarbamol
45 claims
- Tramadol Hcl
Tramadol Hcl
41 claims
- Ciprofloxacin Hcl
Ciprofloxacin Hcl
36 claims
- Cephalexin
Cephalexin
35 claims
- Oxycodone Hcl
Oxycodone Hcl
34 claims
- Tamsulosin Hcl
Tamsulosin Hcl
30 claims
- Oxybutynin Chloride
Oxybutynin Chloride
27 claims
- Hydrocodone-Acetam…
Hydrocodone-Acetaminophen
18 claims
| Drug | Claims |
|---|---|
| Methocarbamol | 45 |
| Tramadol Hcl | 41 |
| Ciprofloxacin Hcl | 36 |
| Cephalexin | 35 |
| Oxycodone Hcl | 34 |
| Tamsulosin Hcl | 30 |
| Oxybutynin Chloride | 27 |
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 18 |
| Nitrofurantoin Mono-Macro Nitrofurantoin Monohyd/M-Cryst | 18 |
| Buprenorphine-Naloxone Buprenorphine Hcl/Naloxone Hcl | 14 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Nurse Practitioner Overview
How Janelle Warren, NP fits within the Nurse Practitioner landscape nationally.
87,700
Nurse Practitioner Providers in US
56
States with Nurse Practitioner
1,084
Avg Claims per Provider
Janelle Warren, NP's 404 claims are below the specialty average of 1,084.
Nationwide Nurse Practitioner peers with similar MIPS or enrollment year
Two federal-record peer sets for Warren, both outside California so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Nurse Practitioner Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Warren.
One of 6,916 Nurse Practitioner providers enrolled in California, 5 are shown here.
Dr. Barbara Aaronson
RN/NURSE PRACTITONER
Los Angeles, CA
Dr. Albert Aba
AGNP
San Francisco, CA
Venice Ababat
Colton, CA
Dr. Martha Ababneh
CNA
El Monte, CA
Dr. Chelsea Abad
CRNP, AGPCNP - BC
Duarte, CA
Compare Nurse Practitioner nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the California medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Nurse Practitioner peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
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Frequently Asked Questions
What is Janelle Warren, NP's specialty? ▼
Janelle Warren, NP specializes in Nurse Practitioner and practices in Loma Linda, California. Credentials: NP.
How much does Janelle Warren, NP prescribe under Medicare Part D? ▼
In 2023, Janelle Warren, NP wrote 404 Medicare Part D claims totaling $14K in drug costs for 156 beneficiaries.
Where is Janelle Warren, NP located? ▼
Janelle Warren, NP is located at 11234 ANDERSON ST, Loma Linda, CA, 92354. Phone: (909) 558-8514.
What is Janelle Warren, NP's NPI number? ▼
Janelle Warren, NP's National Provider Identifier (NPI) is 1184679805, issued on 05/23/2006.
Does Janelle Warren, NP prescribe more brand-name or generic drugs? ▼
Janelle Warren, NP's prescribing is 5% brand-name and 95% generic drugs by claim count, with $7K in brand drug costs.
Does Janelle Warren, NP prescribe opioids? ▼
Yes, Janelle Warren, NP had 93 opioid claims in 2023 with an opioid prescribing rate of 23.0%.
How many Nurse Practitioner providers are there in the US? ▼
There are 87,700 Nurse Practitioner providers across 56 states in the US. The average Nurse Practitioner provider writes 1,084 Medicare Part D claims per year.
What drugs does Janelle Warren, NP prescribe most often? ▼
Based on 2023 Medicare Part D data, Janelle Warren, NP's most frequently prescribed drugs include Methocarbamol, Tramadol Hcl, Ciprofloxacin Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Janelle Warren, NP accept Medicare? ▼
Janelle Warren, NP appears in CMS Medicare data with 404 Part D claims and 156 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Janelle Warren, NP's credentials? ▼
Janelle Warren, NP's NPI is 1184679805 with credentials NP. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Prescribing Data
- CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.