Maxwell J. Castor, PA-C
- Medicare patients, 2024
- 39
- Part D claims, 2024
- 98
- Hospital affiliations
- 1
- Industry payments
- $34
- Medical groups
- 9
- Practice address
- 201 Defense Hwy, Annapolis, MD 21401
- Practice phone
- Call (888) 985-2727
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Relievus
Multi-specialty group site · Annapolis, Maryland
Find Maxwell Castor'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.
Maxwell J. Castor is a physician assistant in Annapolis, Maryland
Maxwell Castor practices at Relievus in Annapolis, Maryland.
Maxwell Castor's NPI, 1700190501, was assigned on August 4, 2010. Maxwell Castor holds New Jersey license 25MP00239000.
- NPI
- 1700190501NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8325930365
- NPI enumeration date
- August 4, 2010
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (888) 985-2727
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 42
- Medical school graduation
- 2010
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Maxwell J. Castor practices at Relievus in Annapolis, Maryland
Maxwell Castor's primary practice is Relievus, at 201 Defense Hwy, Annapolis, MD 21401. The practice phone is (888) 985-2727.
- Relievus201 Defense Hwy, Annapolis, MD 21401Phone(888) 985-2727
Source: Dmand AI Affiliation Data
Maxwell J. Castor is affiliated with 3 sites of care and 9 medical groups
Maxwell Castor's primary practice is Relievus in Annapolis, Maryland. Maxwell Castor is also affiliated with Ocean University Medical Center. The medical group on file is Relievus. Dmand AI also links Maxwell Castor to 8 more medical groups and 1 group practice or clinic, each named with a free account.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Maxwell J. Castor's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Maxwell Castor practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Relievus | Available with a free account |
| +2 more sites and 8 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Maxwell J. Castor is one of 2,452 physician assistants in Maryland
Physician assistant is Maxwell Castor's primary specialty in the NPI Registry, under taxonomy code 363A00000X. Maxwell Castor is licensed in New Jersey.
Specialties and state licenses
- Physician assistant, New JerseyPrimary
Physician assistants near Maxwell Castor
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
Maxwell J. Castor treated 39 Medicare patients in 2024, average age 75
CMS counts 39 Medicare patients who saw Maxwell Castor in 2024. The largest group is 65 to 74, with 19 patients. 75% of them have high blood pressure, and 75% have high cholesterol. Their average risk score is 1.05, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Maxwell Castor's median patient age at 65, with 63% women.
Maxwell Castor's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Maxwell Castor's Medicare patients by sex, 2024
- Women2256%
- Men1744%
Chronic conditions among Maxwell Castor's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis62%
- Ischemic heart disease44%
- Cancer28%
Share of Medicare patients with each condition. A patient can have several.
Maxwell Castor'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
- Women63%
- Men34%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Maxwell J. Castor wrote 98 Medicare Part D claims in 2024
In 2024, Maxwell Castor wrote 98 Medicare Part D claims for 63 patients. 97% of them were for generic drugs.
Maxwell Castor's Part D claims by kind of drug, 2024
- Generic95 claims97%
- Brand-name and other3 claims3%
Drug classes CMS tracks in Maxwell Castor's Part D claims, 2024
- Antibiotics41%40 of 98 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Maxwell J. Castor takes part in Medicare
Maxwell Castor 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)
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Maxwell J. Castor received $34 in industry payments in 2025
CMS Open Payments shows 1 general payment to Maxwell Castor from 1 drug or device company in 2025. Speaker and faculty fees make up the largest share, 100% of the total. Becton, Dickinson and Company paid the most, $34.
Companies that paid Maxwell Castor the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Maxwell J. Castor'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 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) |
| Part D prescribing | Medicare Part D Prescribers - 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) |
| Industry payments | Open Payments (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 Maxwell J. Castor
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Maxwell J. Castor's NPI number?
Maxwell J. Castor's NPI number is 1700190501. It was assigned on August 4, 2010, and it is active in the NPI Registry.
What does Maxwell J. Castor specialize in?
Maxwell J. Castor is a physician assistant in Annapolis, Maryland. The primary specialty in the NPI Registry is Physician Assistant (taxonomy code 363A00000X).
Where does Maxwell J. Castor practice?
Maxwell Castor practices at 201 Defense Hwy, Annapolis, MD 21401. Maxwell Castor's primary practice is Relievus in Annapolis, Maryland. Dmand AI also links Maxwell Castor to 8 medical groups and 1 group practice or clinic.
What is Maxwell J. Castor's office phone number?
The practice phone on file for Maxwell Castor is (888) 985-2727.
What is Maxwell J. Castor's medical license number?
Maxwell Castor holds New Jersey license 25MP00239000.
Which hospitals is Maxwell J. Castor affiliated with?
Maxwell Castor is affiliated with Ocean University Medical Center.
What medical group is Maxwell J. Castor part of?
Maxwell Castor is linked to Relievus. Dmand AI links Maxwell Castor to 8 more medical groups.
Does Maxwell J. Castor accept Medicare?
Yes. CMS lists Maxwell Castor as accepting Medicare assignment.
How many Medicare patients does Maxwell J. Castor see?
CMS counts 39 Medicare patients who saw Maxwell Castor in 2024, with an average age of 75.
Has Maxwell J. Castor received payments from drug or device companies?
CMS Open Payments shows $34 in general payments to Maxwell Castor from 1 company from 2025 to 2025. The largest total came from Becton, Dickinson and Company.
How long has Maxwell J. Castor been practicing?
Maxwell Castor graduated from medical school in 2010, 16 years ago.
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