Mark Andrew Willoughby, M.D.

Primary specialty

Dermatology PhysicianTaxonomy code 207N00000X

License

A69750 Issued in CA

Practice address

319 F St
Ste 102
Chula Vista, CA 91910-2666

Phone

(619) 476-1200

Fax

(619) 420-7849

NPI assigned

Jun 9, 2005

Last updated

Jul 13, 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 1

Addresses

Other identifiers 1

Medicare fee-for-service enrollment

Enrolled in CA

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

Dermatology

Education

Ohio State University College of Medicine, 1997

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Dermatology and Laser Center of San DiegoGroup PAC ID 5395748669, 9 clinicians

Practice addresses (Care Compare)

Merit-based Incentive Payment System (MIPS)

Final score

100 of 100Reported as individual

Quality

100

Improvement activities

40

Procedures performed for Medicare patients

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Networks

• BSC 65 PLUS INDIVIDUAL MAPD

Interoperability endpoints

• Direct secure messaging: mwilloughby81747@scrippshlth.medalliesdirect.net

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.

• Dermatology & Laser Center of San Diego

  • Dermatology Physician
  • Chula Vista, CA
  • NPI 1457396178
  Medicare reassignment Care Compare group NPD
• Scripps Health

  dba Scripps Hospital Medical Services

  • General Acute Care Hospital
  • San Diego, CA
  • NPI 1487928891
  NPD
• Sharp Chula Vista Medical Center

  dba Birch Patrick Convalescent Center

  • Skilled Nursing Facility
  • Chula Vista, CA
  • NPI 1538142369
  NPD (past)

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

{
    "created_epoch": "1118275200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783900800000",
    "number": "1215931993",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "319 F ST",
            "address_2": "STE 102",
            "city": "CHULA VISTA",
            "state": "CA",
            "postal_code": "919102666",
            "telephone_number": "619-476-1200",
            "fax_number": "619-420-7849"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "319 F ST",
            "address_2": "STE 102",
            "city": "CHULA VISTA",
            "state": "CA",
            "postal_code": "919102666",
            "telephone_number": "619-476-1200",
            "fax_number": "619-420-7849"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "WILLOUGHBY",
        "first_name": "MARK",
        "middle_name": "ANDREW",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2005-06-09",
        "last_updated": "2026-07-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207N00000X",
            "taxonomy_group": "",
            "desc": "Dermatology",
            "state": "CA",
            "license": "A69750",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "00A697500",
            "state": "CA"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Terry Gabriel Williams, PHARMD
• Yvonne Renee Williams, RN, MSN, FNP-C
• Felicia Williamson
• Maddison Willis
• Cole Bradford Willoughby, M.D.
• Ashley April Wills
• Kylee Wilmarth
• Joseph Wilson Smith, RN
• Aaron Wilson
• Ashlee S Wilson, LPCC

• Dermatology Physician in Chula Vista, CA
• Providers in Chula Vista, CA by specialty
• Dermatology Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 13, 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.