John Marcelis, MD

Primary specialty

Geriatric Medicine (Internal Medicine) PhysicianTaxonomy code 207RG0300X

License

MD045170E Issued in PA

Practice address

10000 Anns Choice Way
Warminster, PA 18974-3527

Phone

(215) 443-3850

Fax

(215) 443-3963

NPI assigned

Jul 7, 2006

Last updated

Feb 26, 2026By the provider in NPPES

Sex

Male

Sole proprietor

No

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 3

Addresses

Other identifiers 4

Medicare fee-for-service enrollment

Enrolled in PA, TX2 enrollments

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 2

Specialty

Internal Medicine

Education

Temple University School of Medicine, 1987

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Erickson Health Medical Group of Pennsylvania PCGroup PAC ID 3870544083, 20 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Ann's Choice Visiting Nurse Services Home health agency, Warminster, PA, CCN 398072
• Ann's Choice Nursing home, Warminster, PA, CCN 396107

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

All facility ownership & control disclosures 1

Facilities whose Medicare enrollment lists this provider’s PECOS associate ID as an owner or managing party.

Owned or controlled facilities with NPI records 1

Facilities whose Medicare enrollment lists this provider as an owner, officer, director or managing party.

• Ann's Choice, Inc.

  dba Ann's Choice

  • Skilled Nursing Facility
  • Warminster, PA
  • NPI 1114096773

  Adp of the SNF, Operational/Managerial Control

  CMS ownership

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

• Erickson Health Medical Group of Pennsylvania PC

  • Internal Medicine Physician
  • Warminster, PA
  • NPI 1114947991
  Medicare reassignment Care Compare group NPD
• Erickson Health Medical Group of Texas PA

  • Internal Medicine Physician
  • Houston, TX
  • NPI 1285654079
  Medicare reassignment NPD
• Erickson Health Medical Group of Pennsylvania PC

  • Internal Medicine Physician
  • Glen Mills, PA
  • NPI 1235149477
  NPD
• Erickson Health Medical Group of Pennsylvania, PC

  • Durable Medical Equipment & Medical Supplies
  • Warminster, PA
  • NPI 1730335175
  NPD
• Erickson Health Medical Group of Texas, PA

  • Durable Medical Equipment & Medical Supplies
  • Houston, TX
  • NPI 1861706558
  NPD

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

• Ann's Choice, Inc.

  dba Ann's Choice

  • Skilled Nursing Facility
  • Warminster, PA
  • NPI 1114096773

  Nursing home

  Care Compare affiliation
• Ann's Choice, Inc.

  dba Ann's Choice Visiting Nurse Service

  • Home Health Agency
  • Warminster, PA
  • NPI 1952489254
  Care Compare affiliation

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1152230400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1772064000000",
    "number": "1285667105",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "5730 EXECUTIVE DR STE 230",
            "city": "CATONSVILLE",
            "state": "MD",
            "postal_code": "212281762",
            "telephone_number": "215-443-3850",
            "fax_number": "215-443-3963"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "10000 ANNS CHOICE WAY",
            "city": "WARMINSTER",
            "state": "PA",
            "postal_code": "189743527",
            "telephone_number": "215-443-3850",
            "fax_number": "215-443-3963"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "14703 Eagle Vista Dr",
            "address_purpose": "LOCATION",
            "city": "Houston",
            "state": "TX",
            "postal_code": "770775394",
            "country_code": "US",
            "telephone_number": "281-249-7100",
            "fax_number": "281-249-7365",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "3000 Essex Rd",
            "address_purpose": "LOCATION",
            "city": "Tinton Falls",
            "state": "NJ",
            "postal_code": "077532400",
            "country_code": "US",
            "telephone_number": "732-643-2070",
            "fax_number": "732-643-2015",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "MARCELIS",
        "first_name": "JOHN",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-07-07",
        "last_updated": "2026-02-26",
        "certification_date": "2026-02-26",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "PA",
            "license": "MD045170E",
            "primary": false
        },
        {
            "code": "207RG0300X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Geriatric Medicine",
            "state": "NJ",
            "license": "NJDCATEMP-025750",
            "primary": false
        },
        {
            "code": "207RG0300X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Geriatric Medicine",
            "state": "PA",
            "license": "MD045170E",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "EVERCARE",
            "identifier": "0409465",
            "state": null
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "KEYSTONE MCO",
            "identifier": "0417057000",
            "state": "PA"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "HIGHMARK BLE SHIELD",
            "identifier": "SE1562914",
            "state": "PA"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "HIGHMARK BCBS",
            "identifier": "594706",
            "state": null
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Christina Magyar
• Ashley Mahady
• Main Street Pharmacy, L.L.C. (CVS Pharmacy #48564)
• Lisandra Maisonet, RDH
• Majestic Oaks Nursing & Rehabilitation LLC (Majestic Oaks Rehabilitation And Nursing Center)
• Usha Sudhir Marfatia, MD
• Kalie Marino, M.S.W.
• Mark Schnitzel, O.D.
• Alicia Marie Marshall, OTR/L
• Masonic Villages of the Grand Lodge of Pennsylvania (Masonic Village at Warminster)

• Geriatric Medicine (Internal Medicine) Physician in Warminster, PA
• Providers in Warminster, PA by specialty
• Geriatric Medicine (Internal Medicine) Physician in Pennsylvania

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Feb 26, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; facility enrollments, owners and changes of ownership; Provider of Services certification data; 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.

Verify at the official NPI Registry.