Marielle Sophia Gross, M.D.

Primary specialty

Obstetrics & Gynecology PhysicianTaxonomy code 207V00000X

License

MD470686 Issued in PA

Practice address

12 St Paul Dr
Chambersburg, PA 17201-1035

Phone

(717) 217-6882

Fax

(717) 255-0157

NPI assigned

May 20, 2014

Last updated

Mar 18, 2026By the provider in NPPES

Sex

Female

Sole proprietor

Yes

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

Specialties & licenses 3

Addresses

Medicare fee-for-service enrollment

Enrolled in PA

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 1

Specialty

Obstetrics/Gynecology

Education

University of Florida College of Medicine, 2014

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Wellspan Medical GroupGroup PAC ID 1951213115, 2,438 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Wellspan Chambersburg Hospital Hospital, Chambersburg, PA, CCN 390151

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: mgross426294@wellspan.direct-ci.com

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.

• Wellspan Medical Group

  dba WellSpan Digestive Health

  • Gastroenterology Physician
  • York, PA
  • NPI 1669770004
  Medicare reassignment Care Compare group NPD
• University of Pittsburgh Physicians

  • Gastroenterology Physician
  • Pittsburgh, PA
  • NPI 1619935004
  Medicare reassignment NPD
• University of Pittsburgh Physicians

  • Obstetrics & Gynecology Physician
  • Pittsburgh, PA
  • NPI 1134187834
  NPD
• University of Pittsburgh Physicians

  • Diagnostic Radiology Physician
  • Pittsburgh, PA
  • NPI 1285692699
  NPD
• Wellspan Medical Group

  dba Wellspan Pulmonary and Sleep Medicine

  • Pulmonary Disease Physician
  • York, PA
  • NPI 1073756672
  NPD
• Wellspan Medical Group

  dba WellSpan Pediatric Surgical Specialist

  • Pediatric Surgery Physician
  • York, PA
  • NPI 1104799428
  NPD
• The Chambersburg Hospital

  dba WellSpan Chambersburg Hospital

  • General Acute Care Hospital
  • Chambersburg, PA
  • NPI 1902804552
  NPD (past)

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

• The Chambersburg Hospital

  dba WellSpan Chambersburg Hospital

  • Clinic/Center
  • Chambersburg, PA
  • NPI 1215060157

  Hospital

  Care Compare affiliation
• The Chambersburg Hospital

  dba WellSpan Chambersburg Hospital

  • Clinic/Center
  • Chambersburg, PA
  • NPI 1669523320

  Hospital

  Care Compare affiliation
• The Chambersburg Hospital

  dba WellSpan Chambersburg Hospital

  • General Acute Care Hospital
  • Chambersburg, PA
  • NPI 1902804552
  Care Compare affiliation
• The Chambersburg Hospital

  dba WellSpan Chambersburg Hospital

  • Clinic/Center
  • Chambersburg, PA
  • NPI 1952452617

  Hospital

  Care Compare affiliation

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

{
    "created_epoch": "1400544000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1773792000000",
    "number": "1023420486",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "601 MEMORY LN",
            "city": "YORK",
            "state": "PA",
            "postal_code": "174022231",
            "telephone_number": "717-851-1405",
            "fax_number": "717-851-6969"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "12 ST PAUL DR",
            "city": "CHAMBERSBURG",
            "state": "PA",
            "postal_code": "172011035",
            "telephone_number": "717-217-6882",
            "fax_number": "717-255-0157"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "120 N 7th St Ste 200",
            "address_purpose": "LOCATION",
            "city": "Chambersburg",
            "state": "PA",
            "postal_code": "172011795",
            "country_code": "US",
            "telephone_number": "717-217-6882",
            "fax_number": "717-255-0157",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "600 N Wolfe St",
            "address_purpose": "LOCATION",
            "city": "Baltimore",
            "state": "MD",
            "postal_code": "212870005",
            "country_code": "US",
            "telephone_number": "813-541-6103",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "GROSS",
        "first_name": "MARIELLE",
        "middle_name": "SOPHIA",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "YES",
        "sex": "F",
        "enumeration_date": "2014-05-20",
        "last_updated": "2026-03-18",
        "certification_date": "2026-03-18",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207V00000X",
            "taxonomy_group": "",
            "desc": "Obstetrics & Gynecology",
            "state": "PA",
            "license": "MD470686",
            "primary": true
        },
        {
            "code": "207V00000X",
            "taxonomy_group": "",
            "desc": "Obstetrics & Gynecology",
            "state": "PA",
            "license": "FG7823378",
            "primary": false
        },
        {
            "code": "207V00000X",
            "taxonomy_group": "",
            "desc": "Obstetrics & Gynecology",
            "state": "MD",
            "license": "4404",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Genia C Greenland, CRNP
• Ashton Gress, M.S. CCC-SLP
• Anna Grigoryeva, MD
• Amy Christine Grimes, LSW
• Alicia Grinnion, LCSW
• Michael Franklin Grossberg, MD
• Cheryl Ann Grove, RDH, PHDHP
• James E Grove, OD
• Melissa Grove, LPC
• Heather Gruber

• Obstetrics & Gynecology Physician in Chambersburg, PA
• Providers in Chambersburg, PA by specialty
• Obstetrics & Gynecology Physician in Pennsylvania

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Mar 18, 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.

Verify at the official NPI Registry.