NPI registry status
Active
2026 NPPES data Registered Nurse NPI 1164876645
Verify on CMS → Krystal Greeson
Registered Nurse in Chandler, Arizona.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 177,204 in Registered Nurse, 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
494
Medicare Part D claims · 43 beneficiaries · Registered Nurse avg: 1K
Generic prescribing
30%
generic claims · 53% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
87/100
▲ 4 pts above national avg 83.1 · Above neutral
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
Krystal Greeson reported a CMS MIPS final score of 87/100 - above the 83.1 national average - and filed 494 Medicare Part D claims in 2023.
- 87/100
- MIPS score · +4 vs avg
- 494
- Part D claims, 2023
- 30%
- 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.
Krystal Greeson's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
87 Top 48% higher than 52% 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 Krystal Greeson sits
This provider among registered nurse peers
Across the 3,327 registered nurse providers who report both Medicare Part D prescribing and a MIPS quality score, Krystal Greeson writes more Part D claims than 59% of them and scores higher on MIPS quality than 54% - placing this provider in the high-volume, high-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 registered nurse peer from a representative sample of 60; the gold marker is Krystal Greeson. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
What does the federal data show about Krystal Greeson?
High performer (top quartile)Primary specialty
Registered Nurse
Medicare Part D claims
494 51% vs specialty avg
MIPS final score
87/100 3.9 pts vs avg
Specialty distribution in Arizona
How Registered Nurse compares to other specialties among Arizona providers
Medicare quality performance, MIPS
Krystal Greeson's 2023 MIPS final score plotted against the Registered Nurse national average
- MIPS Final Score
- 87/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Registered Nurse) - 87/100 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).
Krystal Greeson appears in the CMS NPPES registry as a Registered Nurse provider at 4254 W ORCHID LN, Chandler, AZ, 85226, with a listed phone of (888) 731-8994. NPI 1164876645 was issued on 04/20/2016.
Medicare Part D records for calendar year 2023 show 494 prescription claims written by this provider, covering 43 Medicare beneficiaries and totaling roughly $189K in drug spend, split 53% brand-name and 30% generic by claim count. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 87/100 for the 2023 performance year (Quality 79.4, Cost 54), compared with the national average of 83.1.
Registered Nurse is a high-volume specialty nationwide, with 177,204 enrolled providers across 56 states and an average of 1,000 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 | 1164876645 |
|---|---|
| Specialty | Registered Nurse |
| Gender | Female |
| NPI Issued | 04/20/2016 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
86.9932
Final Score
Avg: 83.1
79.3582
Quality
53.9524
Cost
88
Promoting Interoperability
Reporting: Group practice
Brand vs generic prescribing mix · Brand-heavy
Krystal Greeson - brand share 53.0%
Registered Nurse average
53% brand-name claims vs 30% generic, on 494 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.
494
Total Claims
$189K
Total Drug Cost
43
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 643
- Total Day Supply
- 18,541
- Brand vs Generic
- 53% brand / 30% generic
- Brand Drug Cost
- $183K
- Generic Drug Cost
- $3K
Patient Demographics
- Average Patient Age
- 66.2 years
- Avg HCC Risk Score
- 1.74
- Gender Split
- 60% female / 40% male
- Age Distribution
- <65: 12, 65-74: 27, 75-84: N/A, 85+: N/A
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Krystal Greeson prescribes most
Top Medicare Part D drugs by claim count, 2023
- Ozempic
Ozempic
59 claims
- Janumet Xr
Janumet Xr
30 claims
- Humalog Kwikpen U-…
Humalog Kwikpen U-100
28 claims
- Metformin Hcl Er
Metformin Hcl Er
26 claims
- Metformin Hcl 19
Metformin Hcl
19 claims
- Atorvastatin Calcium 17
Atorvastatin Calcium
17 claims
- Alcohol Prep Pads 16
Alcohol Prep Pads
16 claims
- Glimepiride 15
Glimepiride
15 claims
| Drug | Claims |
|---|---|
| Ozempic Semaglutide | 59 |
| Janumet Xr Sitagliptin Phos/Metformin Hcl | 30 |
| Humalog Kwikpen U-100 Insulin Lispro | 28 |
| Metformin Hcl Er Metformin Hcl | 26 |
| Metformin Hcl | 19 |
| Atorvastatin Calcium | 17 |
| Alcohol Prep Pads Alcohol Antiseptic Pads | 16 |
| Glimepiride | 15 |
| Lisinopril | 15 |
| Rosuvastatin Calcium | 15 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Registered Nurse Overview
How Krystal Greeson fits within the Registered Nurse landscape nationally.
177,204
Registered Nurse Providers in US
56
States with Registered Nurse
1,000
Avg Claims per Provider
Krystal Greeson's 494 claims are below the specialty average of 1,000.
Nearby Registered Nurse Providers in Arizona
Other clinicians with the same primary specialty enrolled in Arizona, drawn from the same CMS NPPES roster as Greeson.
Dr. Audlandra Aaron-Magee
RN
Tuba City, AZ
Dr. Monique Gia Abad
RN
Tuba City, AZ
Cassandra Abarca
Scottsdale, AZ
Dr. Eric Abat
RN
Tuba City, AZ
Dr. Firoozeh Abbasi
RN
Peoria, AZ
Compare Registered Nurse 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 Arizona medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Registered Nurse 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 Krystal Greeson's specialty? ▼
Krystal Greeson specializes in Registered Nurse and practices in Chandler, Arizona.
How much does Krystal Greeson prescribe under Medicare Part D? ▼
In 2023, Krystal Greeson wrote 494 Medicare Part D claims totaling $189K in drug costs for 43 beneficiaries.
What is Krystal Greeson's Medicare quality score? ▼
Krystal Greeson has a CMS MIPS Final Score of 87/100 (Quality: 79.4, Cost: 54). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Krystal Greeson located? ▼
Krystal Greeson is located at 4254 W ORCHID LN, Chandler, AZ, 85226. Phone: (888) 731-8994.
What is Krystal Greeson's NPI number? ▼
Krystal Greeson's National Provider Identifier (NPI) is 1164876645, issued on 04/20/2016.
Does Krystal Greeson prescribe more brand-name or generic drugs? ▼
Krystal Greeson's prescribing is 53% brand-name and 30% generic drugs by claim count, with $183K in brand drug costs.
How many Registered Nurse providers are there in the US? ▼
There are 177,204 Registered Nurse providers across 56 states in the US. The average Registered Nurse provider writes 1,000 Medicare Part D claims per year.
What drugs does Krystal Greeson prescribe most often? ▼
Based on 2023 Medicare Part D data, Krystal Greeson's most frequently prescribed drugs include Ozempic, Janumet Xr, Humalog Kwikpen U-100. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Krystal Greeson accept Medicare? ▼
Krystal Greeson appears in CMS Medicare data with 494 Part D claims and 43 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Krystal Greeson's credentials? ▼
Krystal Greeson's NPI is 1164876645. 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.