NPI registry status
Active
2026 NPPES data Medical Physician Assistant NPI 1548850076 PA-C
Verify on CMS → Catherine Diaz, PA-C
Medical Physician Assistant in Flowood, Mississippi.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 40,580 in Medical Physician Assistant, 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
622
Medicare Part D claims · 275 beneficiaries · Medical Physician Assistant avg: 1K
Generic prescribing
95%
generic claims · 5% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
45/100
▼ 38 pts below national avg 83.1 · Below average
Industry payments
$1.8K
80 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
Catherine Diaz, PA-C reported a CMS MIPS final score of 45/100 - below the 83.1 national average - and filed 622 Medicare Part D claims in 2023.
- 45/100
- MIPS score · -38 vs avg
- 622
- Part D claims, 2023
- 95%
- generic prescribing
- $1.8K
- 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.
Catherine Diaz, PA-C's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
45 4th percentile higher than 4% 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 Catherine Diaz, PA-C sits
This provider among medical physician assistant peers
Across the 7,339 medical physician assistant providers who report both Medicare Part D prescribing and a MIPS quality score, Catherine Diaz, PA-C writes more Part D claims than 64% of them and scores higher on MIPS quality than 2% - 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 medical physician assistant peer from a representative sample of 60; the gold marker is Catherine Diaz, PA-C. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
What does the federal data show about Catherine Diaz, PA-C?
Below national averagePrimary specialty
Medical Physician Assistant
Medicare Part D claims
622 42% vs specialty avg
MIPS final score
45/100 38.1 pts vs avg
Specialty distribution in Mississippi
How Medical Physician Assistant compares to other specialties among Mississippi providers
Medicare quality performance, MIPS
Catherine Diaz, PA-C's 2023 MIPS final score plotted against the Medical Physician Assistant national average
- MIPS Final Score
- 45/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Medical Physician Assistant) - 45/100 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).
Catherine Diaz, PA-C appears in the CMS NPPES registry as a Medical Physician Assistant provider holding PA-C credentials at 1006 TREETOPS BLVD STE 101, Flowood, MS, 39232, with a listed phone of (601) 939-0005. NPI 1548850076 was issued on 01/19/2021.
Medicare Part D records for calendar year 2023 show 622 prescription claims written by this provider, covering 275 Medicare beneficiaries and totaling roughly $215K in drug spend, split 5% brand-name and 95% generic by claim count. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 45/100 for the 2023 performance year (Quality 0), compared with the national average of 83.1.
Medical Physician Assistant is a mid-sized specialty nationwide, with 40,580 enrolled providers across 55 states and an average of 1,077 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 | 1548850076 |
|---|---|
| Specialty | Medical Physician Assistant |
| Credentials | PA-C |
| Gender | Female |
| NPI Issued | 01/19/2021 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
45
Final Score
Avg: 83.1
0
Quality
100
Promoting Interoperability
Reporting: Individual
Hospital and facility affiliations
Facilities where Catherine Diaz, PA-C 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.
Mississippi Dermatology Associates, PLLC
Flowood, MS
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 Catherine Diaz, PA-C. Source: openpaymentsdata.cms.gov.
Total received
$1.8K
Largest payer
Janssen Biotech, 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 · Generic-heavy
Catherine Diaz, PA-C - brand share 5.0%
Medical Physician Assistant average
5% brand-name claims vs 95% generic, on 622 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.
622
Total Claims
$215K
Total Drug Cost
275
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 657
- Total Day Supply
- 15,946
- Brand vs Generic
- 5% brand / 95% generic
- Brand Drug Cost
- $193K
- Generic Drug Cost
- $22K
- Antibiotic Claims
- 90
Patient Demographics
- Average Patient Age
- 71.1 years
- Avg HCC Risk Score
- 1.14
- Gender Split
- 61% female / 39% male
- Age Distribution
- <65: 43, 65-74: 125, 75-84: 83, 85+: 24
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Catherine Diaz, PA-C prescribes most
Top Medicare Part D drugs by claim count, 2023
- Triamcinolone Acet…
Triamcinolone Acetonide
116 claims
- Clobetasol Propion…
Clobetasol Propionate
96 claims
- Ketoconazole
Ketoconazole
94 claims
- Doxycycline Hyclate
Doxycycline Hyclate
71 claims
- Clindamycin Phosph… 32
Clindamycin Phosphate
32 claims
- Mupirocin 19
Mupirocin
19 claims
- Betamethasone Dipr… 16
Betamethasone Dipropionate
16 claims
- Valacyclovir 16
Valacyclovir
16 claims
| Drug | Claims |
|---|---|
| Triamcinolone Acetonide | 116 |
| Clobetasol Propionate | 96 |
| Ketoconazole | 94 |
| Doxycycline Hyclate | 71 |
| Clindamycin Phosphate | 32 |
| Mupirocin | 19 |
| Betamethasone Dipropionate | 16 |
| Valacyclovir Valacyclovir Hcl | 16 |
| Fluocinolone Acetonide | 15 |
| Fluorouracil | 15 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Medical Physician Assistant Overview
How Catherine Diaz, PA-C fits within the Medical Physician Assistant landscape nationally.
40,580
Medical Physician Assistant Providers in US
55
States with Medical Physician Assistant
1,077
Avg Claims per Provider
Catherine Diaz, PA-C's 622 claims are below the specialty average of 1,077.
Nearby Medical Physician Assistant Providers in Mississippi
Other clinicians with the same primary specialty enrolled in Mississippi, drawn from the same CMS NPPES roster as Diaz.
Dr. Mary Adams
PA-C
Ocean Springs, MS
Dr. Dean Adkins
PA
Tupelo, MS
Dr. Jenna Ainsworth
PA-C
Flowood, MS
Dr. Cassie Allred
PA-C
Holly Springs, MS
Dr. Heather Anderson
PA-C
Vicksburg, MS
Compare Medical Physician Assistant 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 Mississippi medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Medical Physician Assistant 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 Catherine Diaz, PA-C's specialty? ▼
Catherine Diaz, PA-C specializes in Medical Physician Assistant and practices in Flowood, Mississippi. Credentials: PA-C.
How much does Catherine Diaz, PA-C prescribe under Medicare Part D? ▼
In 2023, Catherine Diaz, PA-C wrote 622 Medicare Part D claims totaling $215K in drug costs for 275 beneficiaries.
What is Catherine Diaz, PA-C's Medicare quality score? ▼
Catherine Diaz, PA-C has a CMS MIPS Final Score of 45/100 (Quality: 0). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Catherine Diaz, PA-C located? ▼
Catherine Diaz, PA-C is located at 1006 TREETOPS BLVD STE 101, Flowood, MS, 39232. Phone: (601) 939-0005.
What is Catherine Diaz, PA-C's NPI number? ▼
Catherine Diaz, PA-C's National Provider Identifier (NPI) is 1548850076, issued on 01/19/2021.
Does Catherine Diaz, PA-C prescribe more brand-name or generic drugs? ▼
Catherine Diaz, PA-C's prescribing is 5% brand-name and 95% generic drugs by claim count, with $193K in brand drug costs.
How many Medical Physician Assistant providers are there in the US? ▼
There are 40,580 Medical Physician Assistant providers across 55 states in the US. The average Medical Physician Assistant provider writes 1,077 Medicare Part D claims per year.
What drugs does Catherine Diaz, PA-C prescribe most often? ▼
Based on 2023 Medicare Part D data, Catherine Diaz, PA-C's most frequently prescribed drugs include Triamcinolone Acetonide, Clobetasol Propionate, Ketoconazole. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Catherine Diaz, PA-C accept Medicare? ▼
Catherine Diaz, PA-C appears in CMS Medicare data with 622 Part D claims and 275 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Catherine Diaz, PA-C's credentials? ▼
Catherine Diaz, PA-C's NPI is 1548850076 with credentials PA-C. 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.