Matthew Grigg

Primary specialty

Physical TherapistTaxonomy code 225100000X

License

PT43809 Issued in FL

Practice address

22750 Newcut Rd Ste D-1a
Clarksburg, MD 20871-5333

Phone

(301) 250-2146

NPI assigned

Sep 13, 2024

Sex

Male

Sole proprietor

No

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

Specialties & licenses 1

Addresses

Medicare fee-for-service enrollment

Enrolled in DC, FL2 enrollments

Enrollment records 2

Medicare enrollment (NPD)

Enrolled

State licenses

Practice roles (4 of 5)

Locations

Networks

• Optimum HealthCare HMO Network

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.

• Ati Holdings, LLC

  • Physical Therapy Clinic/Center
  • Rising Sun, MD
  • NPI 1396781050

  DC, Physical Therapist

  Medicare reassignment Care Compare group NPD
• Fitness Quest - Venice LLC

  • Physical Therapy Clinic/Center
  • Lakewood Ranch, FL
  • NPI 1033129895

  FL, Physical Therapist

  Medicare reassignment Care Compare group NPD
• Ati Holdings, LLC

  • Durable Medical Equipment & Medical Supplies
  • King of Prussia, PA
  • NPI 1750194460

  Physical Therapist

  Care Compare group NPD
• Fitness Quest - Venice LLC

  • Durable Medical Equipment & Medical Supplies
  • Longboat Key, FL
  • NPI 1427936889
  Care Compare group NPD
• Ati Holdings, LLC

  • Durable Medical Equipment & Medical Supplies
  • Bel Air, MD
  • NPI 1205028271
  Care Compare group
• Ati Holdings, LLC

  • Durable Medical Equipment & Medical Supplies
  • Pasadena, MD
  • NPI 1952054595
  Care Compare group
• Ati Holdings LLC

  • Durable Medical Equipment & Medical Supplies
  • Dover, DE
  • NPI 1942788179
  Care Compare group
• Ati Holdings, LLC

  • Durable Medical Equipment & Medical Supplies
  • Thorndale, PA
  • NPI 1174140073
  Care Compare group
• Ati Holdings, LLC

  • Durable Medical Equipment & Medical Supplies
  • West Grove, PA
  • NPI 1174715072
  Care Compare group
• Ati Holdings, LLC

  • Durable Medical Equipment & Medical Supplies
  • Wilmington, DE
  • NPI 1194918045
  Care Compare group
• Ati Holdings, LLC

  • Durable Medical Equipment & Medical Supplies
  • Milford, DE
  • NPI 1609015700
  Care Compare group
• Ati Holdings, LLC

  • Durable Medical Equipment & Medical Supplies
  • Newark, DE
  • NPI 1790977767
  Care Compare group

Specialty

Physical Therapist in Private Practice

Education

Other, 2024

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Ati Holdings, LLC 440 clinicians

Fitness Quest - Venice LLC 44 clinicians

Practice addresses (Care Compare)

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

{
    "created_epoch": "1726185600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1778457600000",
    "number": "1952137192",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "790 REMINGTON BLVD",
            "city": "BOLINGBROOK",
            "state": "IL",
            "postal_code": "604404909",
            "telephone_number": "866-370-8206"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "22750 NEWCUT RD STE D-1A",
            "city": "CLARKSBURG",
            "state": "MD",
            "postal_code": "208715333",
            "telephone_number": "301-250-2146"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "GRIGG",
        "first_name": "MATTHEW",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2024-09-13",
        "last_updated": "2026-05-11",
        "certification_date": "2026-05-11",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "225100000X",
            "taxonomy_group": "",
            "desc": "Physical Therapist",
            "state": "FL",
            "license": "PT43809",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

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• Happy Smiles Dental LLC

• All providers in Clarksburg, MD
• Physical Therapist in Maryland

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on May 11, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments.
• 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.