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 40,694 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
723
Medicare Part D claims · 325 beneficiaries · Medical Physician Assistant avg: 1K
Generic prescribing
94%
generic claims · 6% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
45/100
▼ 39 pts below national avg 83.5 · Below average
Industry payments
$1.8K
80 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Catherine Diaz, PA-C reported a CMS MIPS final score of 45/100 - below the 83.5 national average - and filed 723 Medicare Part D claims in 2024.
- 45/100
- MIPS score · -38 vs avg
- 723
- Part D claims, 2024
- 94%
- 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.
Federal trust snapshot
What official records show about Catherine Diaz, PA-C
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 1548850076), first enumerated 01/19/2021.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 723 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 45/100 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
$1.8K in reported industry payments (80 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- 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 1548850076 · Medical Physician Assistant
NPI-10 · ENUM-RECENT · TAX-MID · MIPS-LOW · RX-LIGHT · BOOK-THIN · PHOTO-FINISH
- NPI-10 1548850076
- ENUM-RECENT 2021
- TAX-MID 41K Medical Physician
- MIPS-LOW 45/100
- RX-LIGHT 723
- BOOK-THIN 85 in Mississippi
- PHOTO-FINISH Michaela Duggan, PA · ±0.0
MIPS final-score neighbourhood
Same-specialty nationwide peers by CMS final score, not geographic proximity
- Diaz · this prov…
Diaz · this provider
45 MIPS pts
- Ashley Price, PA…
Ashley Price, PA-C
45 MIPS pts
- Michaela Duggan,…
Michaela Duggan, PA
45 MIPS pts
- April Hansen, PA…
April Hansen, PA-C
45 MIPS pts
- Maria Christina …
Maria Christina Lyons, PA-C
45 MIPS pts
What this shows Nearest measured MIPS peers for this NUCC specialty (2023 performance year).
Catherine Diaz, PA-C'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.
45 ≥ 4th percentile 4% 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 Catherine Diaz, PA-C sits
This provider among medical physician assistant peers
Across the 7,147 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 68% 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.
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
723 37% vs specialty avg
MIPS final score
45/100 38.5 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 83.5 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 | 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
Measured-score avg: 83.5
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 6.0%
Medical Physician Assistant average
6% brand-name claims vs 94% generic, on 723 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.
723
Total Claims
$451K
Total Drug Cost
325
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 796
- Total Day Supply
- 19,771
- Brand vs Generic
- 6% brand / 94% generic
- Brand Drug Cost
- $429K
- Generic Drug Cost
- $22K
- Antibiotic Claims
- 66
Patient Demographics
- Average Patient Age
- 71.4 years
- Avg HCC Risk Score
- 1.08
- Gender Split
- 60% female / 40% male
- Age Distribution
- <65: 40, 65-74: 159, 75-84: 102, 85+: 24
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Catherine Diaz, PA-C prescribes most
Top Medicare Part D drugs by claim count, 2024
- Triamcinolone Acet…
Triamcinolone Acetonide
140 claims
- Clobetasol Propion…
Clobetasol Propionate
130 claims
- Ketoconazole
Ketoconazole
78 claims
- Doxycycline Hyclate
Doxycycline Hyclate
56 claims
- Fluocinolone Aceto… 36
Fluocinolone Acetonide
36 claims
- Clindamycin Phosph… 33
Clindamycin Phosphate
33 claims
- Fluorouracil 27
Fluorouracil
27 claims
- Tacrolimus 23
Tacrolimus
23 claims
| Drug | Claims |
|---|---|
| Triamcinolone Acetonide | 140 |
| Clobetasol Propionate | 130 |
| Ketoconazole | 78 |
| Doxycycline Hyclate | 56 |
| Fluocinolone Acetonide | 36 |
| Clindamycin Phosphate | 33 |
| Fluorouracil | 27 |
| Tacrolimus | 23 |
| Mupirocin | 19 |
| Prednisone | 18 |
* 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.
40,694
Medical Physician Assistant Providers in US
55
States with Medical Physician Assistant
1,139
Avg Claims per Provider
Catherine Diaz, PA-C's 723 claims are below the specialty average of 1,139.
Nationwide Medical Physician Assistant peers with similar MIPS or enrollment year
Two federal-record peer sets for Diaz, both outside Mississippi so the neighborhoods are not geographic containment.
Similar MIPS final score
Nearest same-specialty clinicians by CMS MIPS final score (45 here).
Same NPPES enumeration year (2021)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
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.
One of 85 Medical Physician Assistant providers enrolled in Mississippi, 5 are shown here.
Mary Adams
PA-C
Ocean Springs, MS
Dean Adkins
PA
Tupelo, MS
Jenna Ainsworth
PA-C
Flowood, MS
Cassie Allred
PA-C
Holly Springs, MS
Heather Anderson
PA-C
Vicksburg, MS
Compare Medical Physician Assistant nationally: see state-by-state distribution →
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 2024, Catherine Diaz, PA-C wrote 723 Medicare Part D claims totaling $451K in drug costs for 325 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 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 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 6% brand-name and 94% generic drugs by claim count, with $429K in brand drug costs.
How many Medical Physician Assistant providers are there in the US? ▼
There are 40,694 Medical Physician Assistant providers across 55 states in the US. The average Medical Physician Assistant provider writes 1,139 Medicare Part D claims per year.
What drugs does Catherine Diaz, PA-C prescribe most often? ▼
Based on 2024 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 723 Part D claims and 325 Medicare beneficiaries in 2024. 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 (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.