NPI registry status
Active
2026 NPPES data Critical Care Medicine Nurse Practitioner NPI 1245612654 CNP
Verify on CMS → Crystal Chastain, CNP
Critical Care Medicine Nurse Practitioner in Lawrenceville, Georgia.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 1,414 in Critical Care Medicine 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
372
Medicare Part D claims · 90 beneficiaries · Critical Care Medicine Nurse Practitioner avg: 426
Generic prescribing
75%
generic claims · 25% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
78.4/100
▼ 5 pts below national avg 83.1 · Above neutral
Industry payments
$29.23
2 payments · CMS Open Payments (Sunshine Act)
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
Crystal Chastain, CNP reported a CMS MIPS final score of 78.4/100 - below the 83.1 national average - and filed 372 Medicare Part D claims in 2023.
- 78.4/100
- MIPS score · -5 vs avg
- 372
- Part D claims, 2023
- 75%
- generic prescribing
- $29.23
- 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.
Crystal Chastain, CNP's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
78 27th percentile higher than 27% of 477,587 scored providers
Each bar is a band; taller bars hold more scored 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.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where Crystal Chastain, CNP sits
This provider among critical care medicine nurse practitioner peers
Across the 135 critical care medicine nurse practitioner providers who report both Medicare Part D prescribing and a MIPS quality score, Crystal Chastain, CNP writes more Part D claims than 74% of them and scores higher on MIPS quality than 26% - placing this provider in the high-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Part D claim volume vs MIPS quality, by specialty percentile
Each dot is one critical care medicine nurse practitioner peer from a representative sample of 60; the gold marker is Crystal Chastain, CNP. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
What does the federal data show about Crystal Chastain, CNP?
Near national averagePrimary specialty
Critical Care Medicine Nurse Practitioner
Medicare Part D claims
372 13% vs specialty avg
MIPS final score
78.4/100 4.7 pts vs avg
Specialty distribution in Georgia
How Critical Care Medicine Nurse Practitioner compares to other specialties among Georgia providers
Medicare quality performance, MIPS
Crystal Chastain, CNP's 2023 MIPS final score plotted against the Critical Care Medicine Nurse Practitioner national average
- MIPS Final Score
- 78.4/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Critical Care Medicine Nurse Practitioner) - 78.4/100 vs national avg 83.1
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).
Crystal Chastain, CNP appears in the CMS NPPES registry as a Critical Care Medicine Nurse Practitioner provider holding CNP credentials at 1000 MEDICAL CENTER BLVD, Lawrenceville, GA, 30046, with a listed phone of (678) 312-2418. NPI 1245612654 was issued on 06/22/2015.
Medicare Part D records for calendar year 2023 show 372 prescription claims written by this provider, covering 90 Medicare beneficiaries and totaling roughly $55K in drug spend, split 25% brand-name and 75% generic by claim count. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 78.4/100 for the 2023 performance year (Quality 76.2, Cost 60.8), compared with the national average of 83.1.
Critical Care Medicine Nurse Practitioner is a narrow specialty nationwide, with 1,414 enrolled providers across 50 states and an average of 426 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 | 1245612654 |
|---|---|
| Specialty | Critical Care Medicine Nurse Practitioner |
| Credentials | CNP |
| Gender | Female |
| NPI Issued | 06/22/2015 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
78.35
Final Score
Avg: 83.1
76.1744
Quality
60.8256
Cost
89
Promoting Interoperability
Reporting: Group practice
Hospital and facility affiliations
Facilities where Crystal Chastain, CNP 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.
Gwinnett Physician Group, LLC
Lawrenceville, GA
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 Crystal Chastain, CNP. Source: openpaymentsdata.cms.gov.
Total received
$29
Largest payer
Kestra Medical Technology Services, Inc.
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.
Brand vs generic prescribing mix · Above average
Crystal Chastain, CNP - brand share 25.0%
Critical Care Medicine Nurse Practitioner average
25% brand-name claims vs 75% generic, on 372 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.
372
Total Claims
$55K
Total Drug Cost
90
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 662
- Total Day Supply
- 19,324
- Brand vs Generic
- 25% brand / 75% generic
- Brand Drug Cost
- $51K
- Generic Drug Cost
- $4K
Patient Demographics
- Average Patient Age
- 73.3 years
- Avg HCC Risk Score
- 1.82
- Gender Split
- 33% female / 67% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Crystal Chastain, CNP prescribes most
Top Medicare Part D drugs by claim count, 2023
- Clopidogrel
Clopidogrel
67 claims
- Brilinta
Brilinta
61 claims
- Nitroglycerin
Nitroglycerin
43 claims
- Atorvastatin Calcium
Atorvastatin Calcium
41 claims
- Metoprolol Succinate 22
Metoprolol Succinate
22 claims
- Metoprolol Tartrate 21
Metoprolol Tartrate
21 claims
- Rosuvastatin Calcium 14
Rosuvastatin Calcium
14 claims
- Spironolactone 13
Spironolactone
13 claims
| Drug | Claims |
|---|---|
| Clopidogrel Clopidogrel Bisulfate | 67 |
| Brilinta Ticagrelor | 61 |
| Nitroglycerin | 43 |
| Atorvastatin Calcium | 41 |
| Metoprolol Succinate | 22 |
| Metoprolol Tartrate | 21 |
| Rosuvastatin Calcium | 14 |
| Spironolactone | 13 |
| Losartan Potassium | 12 |
| Amlodipine Besylate | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Critical Care Medicine Nurse Practitioner in GA →
All providers in Georgia →
Compare specialties →
Critical Care Medicine Nurse Practitioner Overview
How Crystal Chastain, CNP fits within the Critical Care Medicine Nurse Practitioner landscape nationally.
1,414
Critical Care Medicine Nurse Practitioner Providers in US
50
States with Critical Care Medicine Nurse Practitioner
426
Avg Claims per Provider
Crystal Chastain, CNP's 372 claims are below the specialty average of 426.
Nearby Critical Care Medicine Nurse Practitioner Providers in Georgia
Other clinicians with the same primary specialty enrolled in Georgia, drawn from the same CMS NPPES roster as Chastain.
Dr. Adriana Acosta-Prows
ARNP
Roswell, GA
Dr. Jennifer Adamski
ARNP,ACNP-BC
Gainesville, GA
Dr. Malcolm Aikens
NP
Atlanta, GA
Dr. Cassie Alexander
ACNP
Augusta, GA
Kyle Almanzar
Atlanta, GA
Compare Critical Care Medicine 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 Georgia medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Critical Care Medicine 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 Crystal Chastain, CNP's specialty? ▼
Crystal Chastain, CNP specializes in Critical Care Medicine Nurse Practitioner and practices in Lawrenceville, Georgia. Credentials: CNP.
How much does Crystal Chastain, CNP prescribe under Medicare Part D? ▼
In 2023, Crystal Chastain, CNP wrote 372 Medicare Part D claims totaling $55K in drug costs for 90 beneficiaries.
What is Crystal Chastain, CNP's Medicare quality score? ▼
Crystal Chastain, CNP has a CMS MIPS Final Score of 78.4/100 (Quality: 76.2, Cost: 60.8). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Crystal Chastain, CNP located? ▼
Crystal Chastain, CNP is located at 1000 MEDICAL CENTER BLVD, Lawrenceville, GA, 30046. Phone: (678) 312-2418.
What is Crystal Chastain, CNP's NPI number? ▼
Crystal Chastain, CNP's National Provider Identifier (NPI) is 1245612654, issued on 06/22/2015.
Does Crystal Chastain, CNP prescribe more brand-name or generic drugs? ▼
Crystal Chastain, CNP's prescribing is 25% brand-name and 75% generic drugs by claim count, with $51K in brand drug costs.
How many Critical Care Medicine Nurse Practitioner providers are there in the US? ▼
There are 1,414 Critical Care Medicine Nurse Practitioner providers across 50 states in the US. The average Critical Care Medicine Nurse Practitioner provider writes 426 Medicare Part D claims per year.
What drugs does Crystal Chastain, CNP prescribe most often? ▼
Based on 2023 Medicare Part D data, Crystal Chastain, CNP's most frequently prescribed drugs include Clopidogrel, Brilinta, Nitroglycerin. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Crystal Chastain, CNP accept Medicare? ▼
Crystal Chastain, CNP appears in CMS Medicare data with 372 Part D claims and 90 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Crystal Chastain, CNP's credentials? ▼
Crystal Chastain, CNP's NPI is 1245612654 with credentials CNP. 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.
- 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 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.
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.