Mark A. Castillo, PA-C
- Medicare patients, 2024
- 15
- Hospital affiliations
- 2
- Medical groups
- 3
- State license
- 1
- Year NPI issued
- 2013
- Practice address
- 900 23rd St NW, Washington, DC 20037
- Practice phone
- Call (202) 716-4605
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Mark Castillo's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Mark A. Castillo is a physician assistant in Washington, District of Columbia
Mark Castillo practices at The George Washington University Hospital in Washington, District of Columbia, part of Universal Health Services.
Mark Castillo's NPI, 1548604408, was assigned on April 23, 2013. Mark Castillo holds Pennsylvania license MA056070.
- NPI
- 1548604408NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0143469106
- NPI enumeration date
- April 23, 2013
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (202) 716-4605
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 40
- Medical school graduation
- 2012
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Mark A. Castillo practices at The George Washington University Hospital in Washington, District of Columbia
Mark Castillo's primary practice is The George Washington University Hospital, at 900 23rd St NW, Washington, DC 20037 in The District County. The practice phone is (202) 716-4605.
- The George Washington University Hospital900 23rd St NW, Washington, DC 20037 · The District CountyPhone(202) 716-4605
Source: Dmand AI Affiliation Data
Mark A. Castillo is affiliated with 5 sites of care and 3 medical groups
Mark Castillo's primary practice is The George Washington University Hospital in Washington, District of Columbia, part of Universal Health Services. Mark Castillo is also affiliated with MedStar Georgetown University Hospital. The medical group on file is MedStar Medical Group. Dmand AI also links Mark Castillo to 3 more group practices and clinics and 2 medical groups, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Mark A. Castillo's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Mark Castillo practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| The George Washington University Hospital | Available with a free account |
| +4 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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Mark A. Castillo is one of 380 physician assistants in District of Columbia
Physician assistant is Mark Castillo's primary specialty in the NPI Registry, under taxonomy code 363A00000X. Mark Castillo is licensed in Pennsylvania.
Specialties and state licenses
- Physician assistant, PennsylvaniaPrimary
Physician assistants near Mark Castillo
Counts of physician assistants with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Mark A. Castillo treated 15 Medicare patients in 2024, average age 72
CMS counts 15 Medicare patients who saw Mark Castillo in 2024. 75% of them have arthritis, and 75% have high blood pressure. Their average risk score is 2.78, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Mark Castillo's median patient age at 65, with 100% women.
Chronic conditions among Mark Castillo's Medicare patients, 2024
- Arthritis75%
- High blood pressure75%
- High cholesterol75%
- Mood disorders75%
- Depression73%
Share of Medicare patients with each condition. A patient can have several.
Mark Castillo's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 65
Patient panel by sex, all payers
- Women100%
- Men0%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
How Mark A. Castillo takes part in Medicare
Mark Castillo accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
Sources for Mark A. Castillo's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Mark A. Castillo
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Mark A. Castillo's NPI number?
Mark A. Castillo's NPI number is 1548604408. It was assigned on April 23, 2013, and it is active in the NPI Registry.
What does Mark A. Castillo specialize in?
Mark A. Castillo is a physician assistant in Washington, District of Columbia. The primary specialty in the NPI Registry is Physician Assistant (taxonomy code 363A00000X).
Where does Mark A. Castillo practice?
Mark Castillo practices at 900 23rd St NW, Washington, DC 20037. Mark Castillo's primary practice is The George Washington University Hospital in Washington, District of Columbia, part of Universal Health Services. Dmand AI also links Mark Castillo to 3 group practices and clinics and 2 medical groups.
What is Mark A. Castillo's office phone number?
The practice phone on file for Mark Castillo is (202) 716-4605.
What is Mark A. Castillo's medical license number?
Mark Castillo holds Pennsylvania license MA056070.
Which hospitals is Mark A. Castillo affiliated with?
Mark Castillo practices at The George Washington University Hospital in Washington, District of Columbia. Mark Castillo is also affiliated with MedStar Georgetown University Hospital.
What medical group is Mark A. Castillo part of?
Mark Castillo is linked to MedStar Medical Group. Dmand AI links Mark Castillo to 2 more medical groups.
Does Mark A. Castillo accept Medicare?
Yes. CMS lists Mark Castillo as accepting Medicare assignment.
How many Medicare patients does Mark A. Castillo see?
CMS counts 15 Medicare patients who saw Mark Castillo in 2024, with an average age of 72.
How long has Mark A. Castillo been practicing?
Mark Castillo graduated from medical school in 2012, 14 years ago.
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