Mark Edward Pearson, M.D.

Primary specialty

Rheumatology PhysicianTaxonomy code 207RR0500X

License

28413 Issued in WI

Practice address

20800 Swenson Dr Ste 175
Waukesha, WI 53186-4000

Phone

(262) 785-0777

Fax

(262) 785-0610

NPI assigned

Aug 4, 2005

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

Other identifiers 2

Medicare fee-for-service enrollment

Enrolled in WI

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

Rheumatology

Education

Medical College of Wisconsin, 1982

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

West Suburban Ctr for ArthritisGroup PAC ID 3274678230, 6 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Waukesha Memorial Hospital Hospital, Waukesha, WI, CCN 520008

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: mpearson20732@direct.phci.org

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.

• West Suburban Ctr for Arthritis

  • Rheumatology Physician
  • Waukesha, WI
  • NPI 1407857188

  Specialist

  Medicare reassignment Care Compare group NPD
• West Suburban Ctr for Arthritis

  • Non-Pharmacy Dispensing Site
  • Waukesha, WI
  • NPI 1932819505
  NPD (past)

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

• Prohealth Waukesha Memorial Hospital, Inc.

  • General Acute Care Hospital
  • Waukesha, WI
  • NPI 1629056890
  Care Compare affiliation

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

{
    "created_epoch": "1123113600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1769990400000",
    "number": "1407857048",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "20800 SWENSON DR STE 175",
            "city": "WAUKESHA",
            "state": "WI",
            "postal_code": "531864000",
            "telephone_number": "262-785-0777",
            "fax_number": "262-785-0610"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "20800 SWENSON DR STE 175",
            "city": "WAUKESHA",
            "state": "WI",
            "postal_code": "531864000",
            "telephone_number": "262-785-0777",
            "fax_number": "262-785-0610"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "PEARSON",
        "first_name": "MARK",
        "middle_name": "EDWARD",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2005-08-04",
        "last_updated": "2026-02-02",
        "certification_date": "2026-02-02",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RR0500X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Rheumatology",
            "state": "WI",
            "license": "28413",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "30809700",
            "state": "WI"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "RAILROAD MEDICARE",
            "identifier": "110036756",
            "state": "WI"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Caryn A Pawlak, MS, RD, CD
• Paws for Counseling
• Patricia Kathleen Pearcy
• Pearl'S Life House Inc.
• Pearls Life House Ops LLC
• Bailey Kay Pease
• Pediatric Healthcare, SC
• Linda Pellmann, M.A., LMFT
• Zoe Penczykowski
• Raelee Penzi

• Rheumatology Physician in Waukesha, WI
• Providers in Waukesha, WI by specialty
• Rheumatology Physician in Wisconsin

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Feb 2, 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.