Kathryn Christen Siems, PA
Physician Assistant · Austin, TX
Kathryn Christen Siems, PA is a physician assistant with a practice address in Austin, Texas, and NPI 1356781579, issued on Jul 2, 2013. Check the license (Texas PA05678, as entered in NPPES) with the Texas board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Kathryn Christen Siems
- Credential
- PA
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- PA05678 TX
Self-reported in NPPES; status is on the state search - Practice location
- 1807 W Slaughter LN, Austin, TX 78748
- Phone
- (512) 282-8967
- Enumerated
- Jul 2, 2013
- Record last updated
- Sep 24, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (512) 406-7351
- Medicare enrollment
- Enrolled (PECOS I20211130000935); accepts Medicare assignment
- Medical or professional school
- Baylor College Of Medicine, 2007
- Entity
- Type 1 · individual
Also registered at 1807 W Slaughter LN
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Christen Gumbs, PT, DPTPhysical Therapist1275926941
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Verify Kathryn Christen Siems in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Texas board licenses this profession
Search for license PA05678Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
40% fewer Medicare Part D claims than the average physician assistant in 2024
494 Medicare Part D claims for 216 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. Brand-name drugs were 3% of claims.
Most prescribed
- Ketoconazole108 claims
- Betamethasone Diprop Augmented94 claims
- Triamcinolone Acetonide79 claims
- Metronidazole21 claims
- Finasteride19 claims
- Clobetasol Propionate18 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $19.37
1 payment: food and beverage; the largest payer was Abbvie Inc. The 64,719 providers of this specialty with any payment received $841.65 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Austin Regional Clinic PAAustin, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
607 physician assistant records list a practice address in Austin
They are 607 of the 26,585 NPPES records with a practice address in Austin, and 10,999 physician assistant records in Texas.
All 607 in Austin → All 10,999 in Texas → Every provider in Austin →
Other physician assistant records in Texas
- Neha Aamir, PAPearland, TX1932821808
- Shaghayegh Ababaf, PA-CLewisville, TX1912372145
- Linda Abad, PA-CHouston, TX1063928240
- Hansaa AbbasiDallas, TX1013575679
- Alicia Abbey, MPAS, PA-CSan Antonio, TX1710468145
- Dallah Abdallahi, PADallas, TX1093294811
- Haya AbdellatifGalveston, TX1518409903
- Hillary Abdennassar, PA-CDallas, TX1245991793
- Hodan Abdi, PA-CDallas, TX1558750075
- Lama Abdillahi, PAGalveston, TX1396668604
Common questions
What is Kathryn Christen Siems, PA's NPI number?
Kathryn Christen Siems, PA's National Provider Identifier (NPI) is 1356781579, issued on Jul 2, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Kathryn Christen Siems, PA located?
The NPPES record lists a practice address at 1807 W Slaughter LN, Austin, TX, 78748. Phone: (512) 282-8967. Providers update this record themselves, so call before visiting.
How can I verify Kathryn Christen Siems, PA's license?
NPPES lists Texas license number PA05678, as entered by the provider. Search the Texas board that licenses this profession; the NPPES record confirms identity only.
How much does Kathryn Christen Siems, PA prescribe under Medicare Part D?
In 2024, Kathryn Christen Siems, PA had 494 Medicare Part D claims for 216 beneficiaries; the average among physician assistant prescribers was 830. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.