NPI registry status
Active
2026 NPPES data Physician Assistant NPI 1912225384 PA-C
Verify on CMS → Katherine Chang, PA-C
Physician Assistant in Corpus Christi, Texas.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 150,974 in 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
759
Medicare Part D claims · 145 beneficiaries · Physician Assistant avg: 790
Generic prescribing
67%
generic claims · 33% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$1.0K
39 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
Katherine Chang, PA-C filed 759 Medicare Part D claims in 2023 as a Physician Assistant in Corpus Christi, Texas, prescribing 67% generic.
- 759
- Part D claims, 2023
- 67%
- generic prescribing
- $1.0K
- 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.
Katherine Chang, PA-C's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
759 Top 29% higher than 71% of 1,370,886 prescribers
Each bar is a band; taller bars hold more prescribers. 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 Medicare Part D Prescriber Public Use File · 2023
What does the federal data show about Katherine Chang, PA-C?
Quality data not reportedPrimary specialty
Physician Assistant
Medicare Part D claims
759 4% vs specialty avg
Specialty distribution in Texas
How Physician Assistant compares to other specialties among Texas providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Physician Assistant. Verify directly:
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).
Katherine Chang, PA-C appears in the CMS NPPES registry as a Physician Assistant provider holding PA-C credentials at 6021 PARKWAY DR, Corpus Christi, TX, 78414, with a listed phone of (361) 985-0323. NPI 1912225384 was issued on 05/11/2010.
Medicare Part D records for calendar year 2023 show 759 prescription claims written by this provider, covering 145 Medicare beneficiaries and totaling roughly $152K in drug spend, split 33% brand-name and 67% generic by claim count.
Physician Assistant is a high-volume specialty nationwide, with 150,974 enrolled providers across 56 states and an average of 790 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 | 1912225384 |
|---|---|
| Specialty | Physician Assistant |
| Credentials | PA-C |
| Gender | Female |
| NPI Issued | 05/11/2010 |
Hospital and facility affiliations
Facilities where Katherine Chang, 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.
Allergy Partners OF Texas Inc
Frisco, TX
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 Katherine Chang, PA-C. Source: openpaymentsdata.cms.gov.
Total received
$1.0K
Largest payer
AstraZeneca Pharmaceuticals LP
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 - Texas TMB 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 ~77K Texas medical licensees in 2023 - they are NOT specific to Katherine Chang, PA-C. To verify Katherine Chang, PA-C's current license status, search the TMB public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
344
Total board actions, Texas 2023
Across 334 cases
4.47
Actions per 1,000 licensees
Texas statewide rate
probation
Most common action type
94 cases
TMB 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 Texas disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Above average
Katherine Chang, PA-C - brand share 33.0%
Physician Assistant average
33% brand-name claims vs 67% generic, on 759 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.
759
Total Claims
$152K
Total Drug Cost
145
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,110
- Total Day Supply
- 30,584
- Brand vs Generic
- 33% brand / 67% generic
- Brand Drug Cost
- $122K
- Generic Drug Cost
- $29K
- Antibiotic Claims
- 29
Patient Demographics
- Average Patient Age
- 69.4 years
- Avg HCC Risk Score
- 1.24
- Gender Split
- 74% female / 26% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Katherine Chang, PA-C prescribes most
Top Medicare Part D drugs by claim count, 2023
- Fluticasone Propio…
Fluticasone Propionate
87 claims
- Symbicort
Symbicort
71 claims
- Famotidine
Famotidine
68 claims
- Azelastine Hcl
Azelastine Hcl
64 claims
- Montelukast Sodium
Montelukast Sodium
53 claims
- Levocetirizine Dih…
Levocetirizine Dihydrochloride
48 claims
- Epinephrine
Epinephrine
47 claims
- Breztri Aerosphere
Breztri Aerosphere
35 claims
| Drug | Claims |
|---|---|
| Fluticasone Propionate | 87 |
| Symbicort Budesonide/Formoterol Fumarate | 71 |
| Famotidine | 68 |
| Azelastine Hcl | 64 |
| Montelukast Sodium | 53 |
| Levocetirizine Dihydrochloride | 48 |
| Epinephrine | 47 |
| Breztri Aerosphere Budesonide/Glycopyr/Formoterol | 35 |
| Albuterol Sulfate Hfa Albuterol Sulfate | 32 |
| Breo Ellipta Fluticasone/Vilanterol | 21 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Physician Assistant Overview
How Katherine Chang, PA-C fits within the Physician Assistant landscape nationally.
150,974
Physician Assistant Providers in US
56
States with Physician Assistant
790
Avg Claims per Provider
Katherine Chang, PA-C's 759 claims are below the specialty average of 790.
Nearby Physician Assistant Providers in Texas
Other clinicians with the same primary specialty enrolled in Texas, drawn from the same CMS NPPES roster as Chang.
Dr. Neha Aamir
PA
Pearland, TX
Dr. Shaghayegh Ababaf
PA-C
Lewisville, TX
Dr. Linda Abad
PA-C
Houston, TX
Hansaa Abbasi
Dallas, TX
Dr. Alicia Abbey
MPAS, PA-C
San Antonio, TX
Compare 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 Texas medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby 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.
Healthcare Guides
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Medical Specialties Explained
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Understanding Medicare Claims Data
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How insurance networks affect your costs
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Frequently Asked Questions
What is Katherine Chang, PA-C's specialty? ▼
Katherine Chang, PA-C specializes in Physician Assistant and practices in Corpus Christi, Texas. Credentials: PA-C.
How much does Katherine Chang, PA-C prescribe under Medicare Part D? ▼
In 2023, Katherine Chang, PA-C wrote 759 Medicare Part D claims totaling $152K in drug costs for 145 beneficiaries.
Where is Katherine Chang, PA-C located? ▼
Katherine Chang, PA-C is located at 6021 PARKWAY DR, Corpus Christi, TX, 78414. Phone: (361) 985-0323.
What is Katherine Chang, PA-C's NPI number? ▼
Katherine Chang, PA-C's National Provider Identifier (NPI) is 1912225384, issued on 05/11/2010.
Does Katherine Chang, PA-C prescribe more brand-name or generic drugs? ▼
Katherine Chang, PA-C's prescribing is 33% brand-name and 67% generic drugs by claim count, with $122K in brand drug costs.
How many Physician Assistant providers are there in the US? ▼
There are 150,974 Physician Assistant providers across 56 states in the US. The average Physician Assistant provider writes 790 Medicare Part D claims per year.
What drugs does Katherine Chang, PA-C prescribe most often? ▼
Based on 2023 Medicare Part D data, Katherine Chang, PA-C's most frequently prescribed drugs include Fluticasone Propionate, Symbicort, Famotidine. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Katherine Chang, PA-C accept Medicare? ▼
Katherine Chang, PA-C appears in CMS Medicare data with 759 Part D claims and 145 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Katherine Chang, PA-C's credentials? ▼
Katherine Chang, PA-C's NPI is 1912225384 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.
- 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.