NPI registry status
Active
2026 NPPES data Nurse Practitioner NPI 1255532149 NP
Verify on CMS → Nnenna Amachi, NP
Nurse Practitioner in Garden Grove, 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 87,227 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
7K
Medicare Part D claims · 431 beneficiaries · Nurse Practitioner avg: 1K
Generic prescribing
97%
generic claims · 3% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Nnenna Amachi, NP filed 6,652 Medicare Part D claims in 2023 as a Nurse Practitioner in Garden Grove, California, prescribing 97% generic.
- 7K
- Part D claims, 2023
- 97%
- generic prescribing
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.
Nnenna Amachi, NP's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
6,652 Top 4% higher than 96% of 1,370,886 prescribers
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.
Source CMS Medicare Part D Prescriber Public Use File · 2023
What does the federal data show about Nnenna Amachi, NP?
Quality data not reportedPrimary specialty
Nurse Practitioner
Medicare Part D claims
6,652 6× 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).
Nnenna Amachi, NP appears in the CMS NPPES registry as a Nurse Practitioner provider holding NP credentials at 12377 LEWIS ST STE 105, Garden Grove, CA, 92840, with a listed phone of (714) 823-4780. NPI 1255532149 was issued on 05/30/2007.
Medicare Part D records for calendar year 2023 show 6,652 prescription claims written by this provider, covering 431 Medicare beneficiaries and totaling roughly $431K in drug spend, split 3% brand-name and 97% generic by claim count.
Nurse Practitioner is a high-volume specialty nationwide, with 87,227 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 | 1255532149 |
|---|---|
| Specialty | Nurse Practitioner |
| Credentials | NP |
| Gender | Female |
| NPI Issued | 05/30/2007 |
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 Nnenna Amachi, NP. To verify Nnenna Amachi, 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
Nnenna Amachi, NP - brand share 3.0%
Nurse Practitioner average
3% brand-name claims vs 97% generic, on 6,652 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.
6,652
Total Claims
$431K
Total Drug Cost
431
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 7,765
- Total Day Supply
- 229,785
- Brand vs Generic
- 3% brand / 97% generic
- Brand Drug Cost
- $292K
- Generic Drug Cost
- $139K
Patient Demographics
- Average Patient Age
- 65.3 years
- Avg HCC Risk Score
- 1.69
- Gender Split
- 68% female / 32% male
- Age Distribution
- <65: 169, 65-74: 172, 75-84: 79, 85+: 11
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Nnenna Amachi, NP prescribes most
Top Medicare Part D drugs by claim count, 2023
- Quetiapine Fumarate
Quetiapine Fumarate
588 claims
- Trazodone Hcl
Trazodone Hcl
543 claims
- Aripiprazole
Aripiprazole
366 claims
- Mirtazapine
Mirtazapine
338 claims
- Olanzapine
Olanzapine
303 claims
- Bupropion Xl
Bupropion Xl
290 claims
- Sertraline Hcl
Sertraline Hcl
282 claims
- Duloxetine Hcl
Duloxetine Hcl
264 claims
| Drug | Claims |
|---|---|
| Quetiapine Fumarate | 588 |
| Trazodone Hcl | 543 |
| Aripiprazole | 366 |
| Mirtazapine | 338 |
| Olanzapine | 303 |
| Bupropion Xl Bupropion Hcl | 290 |
| Sertraline Hcl | 282 |
| Duloxetine Hcl | 264 |
| Fluoxetine Hcl | 247 |
| Escitalopram Oxalate | 244 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Nurse Practitioner Overview
How Nnenna Amachi, NP fits within the Nurse Practitioner landscape nationally.
87,227
Nurse Practitioner Providers in US
56
States with Nurse Practitioner
1,084
Avg Claims per Provider
Nnenna Amachi, NP's 6,652 claims are above the specialty average of 1,084.
Nearby Nurse Practitioner Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Amachi.
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 Nnenna Amachi, NP's specialty? ▼
Nnenna Amachi, NP specializes in Nurse Practitioner and practices in Garden Grove, California. Credentials: NP.
How much does Nnenna Amachi, NP prescribe under Medicare Part D? ▼
In 2023, Nnenna Amachi, NP wrote 6,652 Medicare Part D claims totaling $431K in drug costs for 431 beneficiaries.
Where is Nnenna Amachi, NP located? ▼
Nnenna Amachi, NP is located at 12377 LEWIS ST STE 105, Garden Grove, CA, 92840. Phone: (714) 823-4780.
What is Nnenna Amachi, NP's NPI number? ▼
Nnenna Amachi, NP's National Provider Identifier (NPI) is 1255532149, issued on 05/30/2007.
Does Nnenna Amachi, NP prescribe more brand-name or generic drugs? ▼
Nnenna Amachi, NP's prescribing is 3% brand-name and 97% generic drugs by claim count, with $292K in brand drug costs.
How many Nurse Practitioner providers are there in the US? ▼
There are 87,227 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 Nnenna Amachi, NP prescribe most often? ▼
Based on 2023 Medicare Part D data, Nnenna Amachi, NP's most frequently prescribed drugs include Quetiapine Fumarate, Trazodone Hcl, Aripiprazole. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Nnenna Amachi, NP accept Medicare? ▼
Nnenna Amachi, NP appears in CMS Medicare data with 6,652 Part D claims and 431 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Nnenna Amachi, NP's credentials? ▼
Nnenna Amachi, NP's NPI is 1255532149 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
Compiled from official public sources by the PlainDoctor editorial team.