Catherine Callahan , PA
Physician Assistant • Austin, TX
2400 Hancock Dr
Austin, TX 787562513
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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Catherine Callahan is listed in NPPES under Physician Assistant.
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NPI assigned on January 2, 2017; this date does not establish years in practice.
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Published CMS data list 21 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Progesterone (Progesterone, Micronized) — 21 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See the full table · Guide: How to read Medicare Part D prescriber data
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Fewer Part D prescriptions than 85% of clinicians listed under Physician Assistant in Austin, TX (2024, 281 clinicians with data). Median for this group: 126. Middle half: 44 to 481.
Fewer Part D prescriptions than 90% of clinicians listed under Physician Assistant in Texas (2024, 4,882 clinicians with data). Median for this group: 261. Middle half: 73 to 938.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part D prescriptions went from 15 in 2018 to 21 in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2018–2024.
Practice Location & Contact Primary Location
2400 Hancock Dr
Austin, TX 787562513
What Public CMS Data Show
Physician Assistant: NPPES taxonomy is a reported classification, not proof of board certification.
30-day fills
47 standardized 30-day fills in 2024
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$874 in 2024
The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024.
Open Payments general payments, program year 2025
All general payments: $81.08 across 4 records.
By nature of payment
- Food and Beverage: $81.08 across 4 records.
Reporting-company totals
- Sumitomo Pharma America, Inc.: $33.53 across 2 records.
- ABBVIE INC.: $27.70 across 1 record.
- MILLICENT US INC: $19.85 across 1 record.
A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.
Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2025 (published June 30, 2026).
NPI first issued
2017
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Medicare assignment not listed
CMS data do not show whether this clinician accepts Medicare assignment. This does not mean they do not accept Medicare. Ask the office.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, “Does your provider accept Medicare as full payment?”
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Compared with the same specialty in Austin and Texas
Billing and prescribing volume is not a quality rating.
Medicare Part D prescriptions
Fewer Part D prescriptions than 85% of clinicians listed under Physician Assistant in Austin, TX (2024, 281 clinicians with data). Median for this group: 126. Middle half: 44 to 481.
Fewer Part D prescriptions than 90% of clinicians listed under Physician Assistant in Texas (2024, 4,882 clinicians with data). Median for this group: 261. Middle half: 73 to 938.
Part D drug cost
A lower Part D drug cost than 60% of clinicians listed under Physician Assistant in Austin, TX (2024, 281 clinicians with data). Median for this group: $2,243. Middle half: $383 to $31,479.
A lower Part D drug cost than 70% of clinicians listed under Physician Assistant in Texas (2024, 4,882 clinicians with data). Median for this group: $7,999. Middle half: $749 to $103,240.
607 active clinicians are listed under Physician Assistant with a practice address in Austin, TX (11,008 in Texas).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Austin
15.7% of these 607 clinicians have the CMS telehealth indicator.
47.6% of these 607 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part D prescriptions
Medicare Part D prescriptions went from 15 in 2018 to 21 in 2024.
- 2018: 15
- 2019: 27
- 2023: 13
- 2024: 21
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30-day fills
30-day fills went from 15 in 2018 to 47 in 2024.
- 2018: 15
- 2019: 39
- 2023: 29
- 2024: 47
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Part D drug cost
Part D drug cost decreased 67% from $2,626 in 2018 to $874 in 2024.
- 2018: $2,626
- 2019: $6,178
- 2023: $914
- 2024: $874
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $525.34 in 2021 to $81.08 in 2025.
- 2021: $525.34
- 2022: $1,088.68
- 2023: $1,391.19
- 2024: $773.16
- 2025: $81.08
Sources: CMS Medicare Part D Prescribers (2024), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2025 (payments made January 1 – December 31, 2025): fewer than 11 records totaling $81.08.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| ABBVIE INC. |
Food and Beverage
In-kind items and services
|
BOTOX | General | $27.70 |
| MILLICENT US INC |
Food and Beverage
In-kind items and services
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INTRAROSA | General | $19.85 |
| Sumitomo Pharma America, Inc. |
Food and Beverage
In-kind items and services
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GEMTESA | General | $18.28 |
| Sumitomo Pharma America, Inc. |
Food and Beverage
In-kind items and services
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GEMTESA | General | $15.25 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Progesterone | Progesterone, Micronized | 21 | 1,410 | $873.94 | — |
Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
NUCC Taxonomy Code: 363A00000X
A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.
Career & Practice History
NPI enumerated January 02, 2017.
No changes to the name, practice address, taxonomy or NPI status in this record have been observed in the monthly NPPES data files from January 2017 to August 2026.
NPI Administrative Meta
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Mailing Address
2400 Hancock Dr
Austin, TX 787562513
Phone: 3052980848