Active NPI
Sydney Lynn Marinelli, PA-C
- Physician Assistant
- Prince Frederick, MD
National Provider Identifier
1285583427
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Physician Assistant
- Practice address
- 110 Hospital Rd Ste 201
Prince Frederick, MD 20678-4045 - Phone
- (410) 535-1343
- NPI assigned
- Jan 22, 2026
- Sex
- Female
- Sole proprietor
- No
NPPES NPI Registry
Registry information is reported by the provider to CMS and is not verified. About this source
Specialties & licenses 1
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Physician Assistant | 363A00000X | Primary |
Addresses
Primary practice location
110 Hospital Rd Ste 201
Prince Frederick, MD 20678-4045
Mailing address
44476 Whitestone PL
Tall Timbers, MD 20690-2031
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Enrolled in MD
- Eligible to order & refer
- Part B services: Yes
- Medical equipment: Yes
- Home health: Yes
- Power mobility devices: Yes
- Hospice: No
Enrollment records 1
| Enrollment ID | State | Provider type | PAC ID | Details |
|---|---|---|---|---|
| I20260317001608 | MD | Practitioner - Physician Assistant | 3476036534 | Reassigns benefits to 1 organization |
Care Compare profile
Medicare Care Compare- Specialty
- Physician Assistant
- Education
- Other, 2025
- Medicare assignment
- Accepts the Medicare-approved amount as payment in full
- Group practices
- Centers for Advanced Orthopaedics LLC
Practice addresses (Care Compare)
110 Hospital Rd
Suite 201
Prince Frederick, MD 20678-4045
Phone (410) 535-1343
86 Thomas Johnson CT
Frederick, MD 21702-4348
Phone (301) 694-8311
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
Practice roles
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| Centers for Advanced Orthopaedics, LLC | Current | Accepting new patients | |
| Centers for Advanced Orthopaedics, LLC | Current | Accepting new patients |
Locations
110 Hospital Rd
Ste 201
Prnc Frederck, MD 20678
Phone (410) 353-1343
Organizations & group practices 3
Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships and National Provider Directory roles.
-
- Orthopaedic Surgery Physician
- Gainesville, VA
- NPI 1063393833
-
- Orthopaedic Surgery Physician
- Leesburg, VA
- NPI 1982160362
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1769040000000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1769040000000",
"number": "1285583427",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "44476 WHITESTONE PL",
"city": "TALL TIMBERS",
"state": "MD",
"postal_code": "206902031"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "110 HOSPITAL RD STE 201",
"city": "PRINCE FREDERICK",
"state": "MD",
"postal_code": "206784045",
"telephone_number": "410-535-1343"
}
],
"practiceLocations": [],
"basic": {
"last_name": "MARINELLI",
"first_name": "SYDNEY",
"middle_name": "LYNN",
"credential": "PA-C",
"sole_proprietor": "NO",
"sex": "F",
"enumeration_date": "2026-01-22",
"last_updated": "2026-01-22",
"certification_date": "2026-01-22",
"status": "A"
},
"taxonomies": [
{
"code": "363A00000X",
"taxonomy_group": "",
"desc": "Physician Assistant",
"state": null,
"license": null,
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}
Other providers in Prince Frederick, MD
- Aparajita K Mahata, MD F.A.C.O.G.
- Carolina Maman-Applewhite, MD
- Christiana Deane Mankey, RBT
- Manoj Mathur MD PA
- Kanwal Mansur, MS, CNS, LDN, MBBS
- Victoria M Marino, CRNA
- Cameron Leann Marks, CAC-ADP
- Barbra Jennifer Martin-Klinikowski, BA,CAC-AD
- Brittany Karynne Russell Martin, MS OTR/L
- Maryland Eye Surgery Center, L.L.C.
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jan 22, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
- Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
- Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.