NPI registry status
Active
2026 NPPES data Family Nurse Practitioner NPI 1396238929 NP
Verify on CMS → Stephanie Porter, NP
Family Nurse Practitioner in Thousand Oaks, 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 210,832 in Family 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
149
Medicare Part D claims · 76 beneficiaries · Family Nurse Practitioner avg: 1K
Generic prescribing
91%
generic claims · 9% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$2.0K
79 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Stephanie Porter, NP filed 149 Medicare Part D claims in 2023 as a Family Nurse Practitioner in Thousand Oaks, California, prescribing 91% generic.
- 149
- Part D claims, 2023
- 91%
- generic prescribing
- $2.0K
- industry payments (Sunshine Act)
- ≥35th
- 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.
CMS NPPES provider registry desk
NPI 1396238929 · Family Nurse Practitioner
NPI-10 · ENUM-RECENT · TAX-MEGA · RX-LIGHT · BOOK-MID · PHOTO-ENUM
- NPI-10 1396238929
- ENUM-RECENT 2018
- TAX-MEGA 211K Family Nurse
- RX-LIGHT 149
- BOOK-MID 15,115 in California
- PHOTO-ENUM Kristen Leany · 2018
Stephanie Porter, NP's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
149 ≥ 35th percentile 35% 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 Stephanie Porter, NP?
Quality data not reportedPrimary specialty
Family Nurse Practitioner
Medicare Part D claims
149 88% vs specialty avg
Specialty distribution in California
How Family 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 Family 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).
Practice Address
Provider Details
| NPI | 1396238929 |
|---|---|
| Specialty | Family Nurse Practitioner |
| Credentials | NP |
| Gender | Female |
| NPI Issued | 06/08/2018 |
Hospital and facility affiliations
Facilities where Stephanie Porter, NP bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.
Dr Mayha Patel Inc
Westlake Village, CA
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Stephanie Porter, NP. Source: openpaymentsdata.cms.gov.
Total received
$2.0K
Largest payer
Incyte Corporation
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
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 Stephanie Porter, NP. To verify Stephanie Porter, 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
Stephanie Porter, NP - brand share 9.0%
Family Nurse Practitioner average
9% brand-name claims vs 91% generic, on 149 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.
149
Total Claims
$22K
Total Drug Cost
76
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 166
- Total Day Supply
- 4,299
- Brand vs Generic
- 9% brand / 91% generic
- Brand Drug Cost
- $15K
- Generic Drug Cost
- $7K
- Antibiotic Claims
- 17
Patient Demographics
- Average Patient Age
- 75.2 years
- Avg HCC Risk Score
- 0.90
- Gender Split
- 67% female / 33% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Stephanie Porter, NP prescribes most
Top Medicare Part D drugs by claim count, 2023
- Clobetasol Propion…
Clobetasol Propionate
32 claims
- Ketoconazole
Ketoconazole
19 claims
- Triamcinolone Acet…
Triamcinolone Acetonide
19 claims
- Doxycycline Monohy… 12
Doxycycline Monohydrate
12 claims
| Drug | Claims |
|---|---|
| Clobetasol Propionate | 32 |
| Ketoconazole | 19 |
| Triamcinolone Acetonide | 19 |
| Doxycycline Monohydrate | 12 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Family Nurse Practitioner Overview
How Stephanie Porter, NP fits within the Family Nurse Practitioner landscape nationally.
210,832
Family Nurse Practitioner Providers in US
56
States with Family Nurse Practitioner
1,222
Avg Claims per Provider
Stephanie Porter, NP's 149 claims are below the specialty average of 1,222.
Nationwide Family Nurse Practitioner peers with similar MIPS or enrollment year
Two federal-record peer sets for Porter, both outside California so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2018)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Family Nurse Practitioner Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Porter.
One of 15,115 Family Nurse Practitioner providers enrolled in California, 5 are shown here.
Dr. Danielle Aaroe
FAMILY NURSE PRACTIT
Oroville, CA
Joshua Aaron
Mission Hills, CA
Dr. Orly Aaron
NP
San Francisco, CA
Paris Gilbert Russ Aaron
Sacramento, CA
Dr. Alvin Joseph Abad
FNP-C
San Francisco, CA
Compare Family Nurse Practitioner nationally: see state-by-state distribution →
Frequently Asked Questions
What is Stephanie Porter, NP's specialty? ▼
Stephanie Porter, NP specializes in Family Nurse Practitioner and practices in Thousand Oaks, California. Credentials: NP.
How much does Stephanie Porter, NP prescribe under Medicare Part D? ▼
In 2023, Stephanie Porter, NP wrote 149 Medicare Part D claims totaling $22K in drug costs for 76 beneficiaries.
Where is Stephanie Porter, NP located? ▼
Stephanie Porter, NP is located at 3180 WILLOW LN STE 216, Thousand Oaks, CA, 91361. Phone: (805) 491-5992.
What is Stephanie Porter, NP's NPI number? ▼
Stephanie Porter, NP's National Provider Identifier (NPI) is 1396238929, issued on 06/08/2018.
Does Stephanie Porter, NP prescribe more brand-name or generic drugs? ▼
Stephanie Porter, NP's prescribing is 9% brand-name and 91% generic drugs by claim count, with $15K in brand drug costs.
How many Family Nurse Practitioner providers are there in the US? ▼
There are 210,832 Family Nurse Practitioner providers across 56 states in the US. The average Family Nurse Practitioner provider writes 1,222 Medicare Part D claims per year.
What drugs does Stephanie Porter, NP prescribe most often? ▼
Based on 2023 Medicare Part D data, Stephanie Porter, NP's most frequently prescribed drugs include Clobetasol Propionate, Ketoconazole, Triamcinolone Acetonide. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Stephanie Porter, NP accept Medicare? ▼
Stephanie Porter, NP appears in CMS Medicare data with 149 Part D claims and 76 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Stephanie Porter, NP's credentials? ▼
Stephanie Porter, NP's NPI is 1396238929 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.