Martin Castillo, PA-C
Physician Assistant · Austin, TX
Martin Castillo, PA-C is a physician assistant with a practice address in Austin, Texas, and NPI 1720729403, issued on Apr 5, 2022. Check the license with the Texas board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Martin Castillo
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- Practice location
- 13617 Caldwell Dr Ste 100, Austin, TX 78750
- Phone
- (512) 846-7110
- Enumerated
- Apr 5, 2022
- Record last updated
- Nov 18, 2022
- Medicare enrollment
- Enrolled (PECOS I20230202003351); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 10,999 in Texas → Look up another NPI →
Also registered at 13617 Caldwell Dr Ste 100
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ramesh Singa, M.D.Pain Medicine (Anesthesiology) Physician1184981805
Verify Martin Castillo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Texas board licenses this professionCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
82% more Medicare Part D claims than the average physician assistant in 2024
1,510 Medicare Part D claims for 432 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. Brand-name drugs were 7% of claims. 282 claims were for opioids.
Most prescribed
- Gabapentin272 claims
- Tramadol Hcl193 claims
- Pregabalin118 claims
- Methocarbamol102 claims
- Tizanidine Hcl100 claims
- Cyclobenzaprine Hcl84 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: $2,765.95
92 payments; by number, the most common kind was food and beverage; the largest payer was Abbott Laboratories. 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
- Republic Spine And Pain, PAGeorgetown, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Martin Castillo among 10,999 physician assistant records in Texas
Martin Castillo, PA-C is one of 10,999 physician assistant records with a practice address in Texas. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2022, is newer than 74% of them.
- NPI issued2022 · 74% of these records are older, 18% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 55% of these records are
- Graduated2022 · median 2017 among the 6,096 with a school on file
- Record last updated2022 · 40% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (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 10,999 in Texas → Every provider in Austin → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
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- Allyson ClendennenAustin, TX 787501003743816
- Nicole Delgado, PAAustin, TX 787501053044818
- Michelle Hall, PA-CAustin, TX 787501639321227
- Jessica Holley, PA-CAustin, TX 787501588901896
Common questions
What is Martin Castillo, PA-C's NPI number?
Martin Castillo, PA-C's National Provider Identifier (NPI) is 1720729403, issued on Apr 5, 2022. An NPI identifies a provider in billing; it is not a license.
Where is Martin Castillo, PA-C located?
The NPPES record lists a practice address at 13617 Caldwell Dr Ste 100, Austin, TX, 78750. Phone: (512) 846-7110. Providers update this record themselves, so call before visiting.
How can I verify Martin Castillo, PA-C's license?
Search the Texas board that licenses this profession; the NPPES record confirms identity only.
How much does Martin Castillo, PA-C prescribe under Medicare Part D?
In 2024, Martin Castillo, PA-C had 1,510 Medicare Part D claims for 432 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.