NPI registry status
Active
2026 NPPES data Acute Care Nurse Practitioner NPI 1447491147 N.P./C.N.S.
Verify on CMS → Tamara Chaker, N.P./C.N.S.
Acute Care Nurse Practitioner in Orange, 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 25,345 in Acute Care 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
1K
Medicare Part D claims · 258 beneficiaries · Acute Care Nurse Practitioner avg: 623
Generic prescribing
75%
generic claims · 25% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
100/100
▲ 17 pts above national avg 83.5 · Exceptional
Industry payments
$361.53
10 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Tamara Chaker, N.P./C.N.S. reported a CMS MIPS final score of 100/100 - above the 83.5 national average - and filed 1,011 Medicare Part D claims in 2024.
- 100/100
- MIPS score · +17 vs avg
- 1K
- Part D claims, 2024
- 75%
- generic prescribing
- $361.53
- industry payments (Sunshine Act)
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.
Federal trust snapshot
What official records show about Tamara Chaker, N.P./C.N.S.
Federal records show an active NPI with both Medicare prescribing volume and a measured CMS quality score — objective registry data, not patient reviews.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1447491147), first enumerated 03/10/2009.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 1,011 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
CMS quality reporting (MIPS)
Reported a CMS MIPS final score of 100/100 in the Quality Payment Program — a federal quality measure, not a patient review.
Source: CMS Quality Payment Program
- Reported
Hospital affiliations
1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- Reported
Industry payment transparency
$361.53 in reported industry payments (10 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- State context
State board disciplinary context
California statewide board action statistics are published annually — these figures describe aggregate state activity, not Tamara Chaker, N.P./C.N.S.'s individual license status. Verify directly with the state medical board.
Source: MBC annual report 2023
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1447491147 · Acute Care Nurse Practitioner
NPI-10 · ENUM-MID · TAX-MID · MIPS-ELITE · RX-MID · BOOK-LIGHT · PHOTO-FINISH
- NPI-10 1447491147
- ENUM-MID 2009
- TAX-MID 25K Acute Care
- MIPS-ELITE 100/100
- RX-MID 1,011
- BOOK-LIGHT 1,703 in California
- PHOTO-FINISH Diana Amenya, APRN · ±0.0
MIPS final-score neighbourhood
Same-specialty nationwide peers by CMS final score, not geographic proximity
- Chaker · this pr…
Chaker · this provider
100 MIPS pts
- Heather Bean, AR…
Heather Bean, ARNP
100 MIPS pts
- Diana Amenya, AP…
Diana Amenya, APRN
100 MIPS pts
- Colleen Aouane, …
Colleen Aouane, NP
100 MIPS pts
- Jonathan Aspinwa…
Jonathan Aspinwall, ARNP
100 MIPS pts
What this shows Nearest measured MIPS peers for this NUCC specialty (2023 performance year).
Tamara Chaker, N.P./C.N.S.'s MIPS score vs every measured U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure. Clinicians whose score CMS assigned without scoring any category are excluded.
100 ≥ 92nd percentile 92% of 454,083 measured providers are in lower value bands
Each bar is a band; taller bars hold more measured providers. 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 whole-score-point band: it counts only measured clinicians in lower score bands. A CMS MIPS metric is not a recommendation or a clinical-quality rating by PlainDoctor. See methodology § corpus placement.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where Tamara Chaker, N.P./C.N.S. sits
This provider among acute care nurse practitioner peers
Across the 3,830 acute care nurse practitioner providers who report both Medicare Part D prescribing and a MIPS quality score, Tamara Chaker, N.P./C.N.S. writes more Part D claims than 85% of them and scores higher on MIPS quality than 93% - placing this provider in the high-volume, high-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Each dot is one acute care nurse practitioner peer from a representative sample of 60; the gold marker is Tamara Chaker, N.P./C.N.S.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
What does the federal data show about Tamara Chaker, N.P./C.N.S.?
High performer (top quartile)Primary specialty
Acute Care Nurse Practitioner
Medicare Part D claims
1,011 62% vs specialty avg
MIPS final score
100/100 16.5 pts vs avg
Specialty distribution in California
How Acute Care Nurse Practitioner compares to other specialties among California providers
Medicare quality performance, MIPS
Tamara Chaker, N.P./C.N.S.'s 2023 MIPS final score plotted against the Acute Care Nurse Practitioner national average
- MIPS Final Score
- 100/100
- vs 83.5 national avg · 2023 performance year
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 | 1447491147 |
|---|---|
| Specialty | Acute Care Nurse Practitioner |
| Credentials | N.P./C.N.S. |
| Gender | Female |
| NPI Issued | 03/10/2009 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
100
Final Score
Measured-score avg: 83.5
82.4039
Quality
100
Promoting Interoperability
Reporting: Alternative Payment Model
Hospital and facility affiliations
Facilities where Tamara Chaker, N.P./C.N.S. 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.
UC Regents
Orange, 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 Tamara Chaker, N.P./C.N.S.. Source: openpaymentsdata.cms.gov.
Total received
$362
Largest payer
Abbott Laboratories
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 Tamara Chaker, N.P./C.N.S.. To verify Tamara Chaker, N.P./C.N.S.'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 · Above average
Tamara Chaker, N.P./C.N.S. - brand share 25.0%
Acute Care Nurse Practitioner average
25% brand-name claims vs 75% generic, on 1,011 2024 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 2024.
1,011
Total Claims
$232K
Total Drug Cost
258
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 2,179.6
- Total Day Supply
- 64,505
- Brand vs Generic
- 25% brand / 75% generic
- Brand Drug Cost
- $218K
- Generic Drug Cost
- $14K
Patient Demographics
- Average Patient Age
- 72.6 years
- Avg HCC Risk Score
- 3.30
- Gender Split
- 40% female / 60% male
- Age Distribution
- <65: 46, 65-74: 91, 75-84: 76, 85+: 45
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Tamara Chaker, N.P./C.N.S. prescribes most
Top Medicare Part D drugs by claim count, 2024
- Spironolactone
Spironolactone
106 claims
- Metoprolol Succinate
Metoprolol Succinate
100 claims
- Entresto
Entresto
89 claims
- Bumetanide
Bumetanide
66 claims
- Jardiance
Jardiance
59 claims
- Atorvastatin Calcium
Atorvastatin Calcium
51 claims
- Furosemide
Furosemide
50 claims
- Losartan Potassium
Losartan Potassium
49 claims
| Drug | Claims |
|---|---|
| Spironolactone | 106 |
| Metoprolol Succinate | 100 |
| Entresto Sacubitril/Valsartan | 89 |
| Bumetanide | 66 |
| Jardiance Empagliflozin | 59 |
| Atorvastatin Calcium | 51 |
| Furosemide | 50 |
| Losartan Potassium | 49 |
| Eliquis Apixaban | 41 |
| Hydralazine Hcl | 41 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Acute Care Nurse Practitioner Overview
How Tamara Chaker, N.P./C.N.S. fits within the Acute Care Nurse Practitioner landscape nationally.
25,345
Acute Care Nurse Practitioner Providers in US
53
States with Acute Care Nurse Practitioner
623
Avg Claims per Provider
Tamara Chaker, N.P./C.N.S.'s 1,011 claims are above the specialty average of 623.
Nationwide Acute Care Nurse Practitioner peers with similar MIPS or enrollment year
Two federal-record peer sets for Chaker, both outside California so the neighborhoods are not geographic containment.
Similar MIPS final score
Nearest same-specialty clinicians by CMS MIPS final score (100 here).
Same NPPES enumeration year (2009)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Acute Care Nurse Practitioner Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Chaker.
One of 1,703 Acute Care Nurse Practitioner providers enrolled in California, 5 are shown here.
Jessica Aaronson
Lynwood, CA
Naima Abdirahman
NP
Long Beach, CA
Jenna Abeloe
NP
Ventura, CA
Rhonald Abitona
San Francisco, CA
Tara Abrams
NP
Los Angeles, CA
Compare Acute Care Nurse Practitioner nationally: see state-by-state distribution →
Frequently Asked Questions
What is Tamara Chaker, N.P./C.N.S.'s specialty? ▼
Tamara Chaker, N.P./C.N.S. specializes in Acute Care Nurse Practitioner and practices in Orange, California. Credentials: N.P./C.N.S..
How much does Tamara Chaker, N.P./C.N.S. prescribe under Medicare Part D? ▼
In 2024, Tamara Chaker, N.P./C.N.S. wrote 1,011 Medicare Part D claims totaling $232K in drug costs for 258 beneficiaries.
What is Tamara Chaker, N.P./C.N.S.'s Medicare quality score? ▼
Tamara Chaker, N.P./C.N.S. has a CMS MIPS Final Score of 100/100 (Quality: 82.4). The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Tamara Chaker, N.P./C.N.S. located? ▼
Tamara Chaker, N.P./C.N.S. is located at 101 THE CITY DR S, Orange, CA, 92868. Phone: (714) 456-7890.
What is Tamara Chaker, N.P./C.N.S.'s NPI number? ▼
Tamara Chaker, N.P./C.N.S.'s National Provider Identifier (NPI) is 1447491147, issued on 03/10/2009.
Does Tamara Chaker, N.P./C.N.S. prescribe more brand-name or generic drugs? ▼
Tamara Chaker, N.P./C.N.S.'s prescribing is 25% brand-name and 75% generic drugs by claim count, with $218K in brand drug costs.
How many Acute Care Nurse Practitioner providers are there in the US? ▼
There are 25,345 Acute Care Nurse Practitioner providers across 53 states in the US. The average Acute Care Nurse Practitioner provider writes 623 Medicare Part D claims per year.
What drugs does Tamara Chaker, N.P./C.N.S. prescribe most often? ▼
Based on 2024 Medicare Part D data, Tamara Chaker, N.P./C.N.S.'s most frequently prescribed drugs include Spironolactone, Metoprolol Succinate, Entresto. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Tamara Chaker, N.P./C.N.S. accept Medicare? ▼
Tamara Chaker, N.P./C.N.S. appears in CMS Medicare data with 1,011 Part D claims and 258 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Tamara Chaker, N.P./C.N.S.'s credentials? ▼
Tamara Chaker, N.P./C.N.S.'s NPI is 1447491147 with credentials N.P./C.N.S.. 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 (2024). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Quality Performance
- CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
- 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 August 2026 (NPPES) / 2024 (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 August 2026.