Mark A. Castillo, PA-C
Physician Assistant · Washington, DC
Mark A. Castillo, PA-C is a physician assistant with a practice address in Washington, District of Columbia, and NPI 1548604408, issued on Apr 23, 2013. Check the license with the District of Columbia board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Mark A. Castillo
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- MA056070 PA
Self-reported in NPPES; status is on the state search - Practice location
- 1310 Southern Ave SE, Washington, DC 20032
- Phone
- (202) 741-3296
- Enumerated
- Apr 23, 2013
- Record last updated
- Oct 15, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20191226002050); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 558 in District of Columbia → Look up another NPI →
Also registered at 1310 Southern Ave SE
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Mark A. Castillo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich District of Columbia 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
Bills Medicare through one group practice
- Medstar Medical Group II LLCWashington, DC
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark A. Castillo among 558 physician assistant records in District of Columbia
Mark A. Castillo, PA-C is one of 558 physician assistant records with a practice address in District of Columbia. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2013, is newer than 35% of them.
- NPI issued2013 · 35% of these records are older, 61% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 47% of these records are
- Graduated2012 · median 2019 among the 262 with a school on file
- Record last updated2021 · 39% 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 District of Columbia practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
552 physician assistant records list a practice address in Washington
They are 552 of the 45,857 NPPES records with a practice address in Washington, and 558 physician assistant records in District of Columbia.
All 558 in District of Columbia → Every provider in Washington → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
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- Mariah FaganWashington, DC 200321396543005
- Todd Gray, PABolling Afb, DC 200321962515684
- Darnell Jones, PAWashington, DC 200321477598464
- Brenna LloydWashington, DC 200321255195871
- Nathaniel Madsen, PACWashington, DC 200321285861476
Common questions
What is Mark A. Castillo, PA-C's NPI number?
Mark A. Castillo, PA-C's National Provider Identifier (NPI) is 1548604408, issued on Apr 23, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Mark A. Castillo, PA-C located?
The NPPES record lists a practice address at 1310 Southern Ave SE, Washington, DC, 20032. Phone: (202) 741-3296. Providers update this record themselves, so call before visiting.
How can I verify Mark A. Castillo, PA-C's license?
Search the District of Columbia board that licenses this profession; the NPPES record confirms identity 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.