NPIMap

Individual provider Active NPI

Mei Lai So, MD

  • Internal Medicine Physician
  • Tucson, AZ
National Provider Identifier
1669935441
Registry record updated Jun 19, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Internal Medicine PhysicianTaxonomy code 207R00000X
License
65443 Issued in AZ
Practice address
6236 E Pima St Ste 100
Tucson, AZ 85712-3164
Phone
(520) 327-6874
Fax
(520) 327-0028
NPI assigned
Apr 9, 2019
Sex
Female
Sole proprietor
Yes

NPPES NPI Registry

Updated by the provider on Jun 19, 2026

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Internal Medicine Physician 207R00000X 65443 AZ Primary

Addresses

Primary practice location

6236 E Pima St Ste 100
Tucson, AZ 85712-3164

Mailing address

4801 E Broadway Blvd Ste 251
Tucson, AZ 85711-2700
Phone (520) 327-0460

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in AZ
Eligible to order & refer
  • Part B services
  • Medical equipment
  • Home health
  • Power mobility devices
  • Hospice
Green means eligible to order or refer.

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20220830003924 AZ Practitioner - Internal Medicine 0345575957 Reassigns benefits to 2 organizations

Care Compare profile

Medicare Care Compare
Specialty
Internal Medicine
Education
University of Arizona College of Medicine, 2019
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Telehealth
Offers telehealth services
Group practices
Banner-University Medical GroupGroup PAC ID 7719899871, 1,066 clinicians
Arizona Community Physicians PCGroup PAC ID 4587560552, 162 clinicians

Practice addresses (Care Compare)

1625 N Campbell Ave
Tucson, AZ 85719-4330
Phone (520) 694-0111

6236 E Pima St
Tucson, AZ 85712-3154
Phone (520) 327-6874

Hospital & facility affiliations

Merit-based Incentive Payment System (MIPS)

Final score
93.34 of 100Reported as apm
Quality
74.56
Promoting interoperability
99
Improvement activities
40

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Doctor of Medicine

State licenses

LicenseStateTypeSpecialty
65443AZMDInternal Medicine Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Banner-University Medical Group Family Medicine Current Accepting new patients
Banner-University Medical Group CurrentSince Aug 9, 2022 Accepting new patients
Arizona Community Physicians PC Family Medicine CurrentSince Oct 20, 2025 Accepting new patients
Banner-University Medical Group CurrentSince Aug 9, 2022 Accepting new patients
Arizona Community Physician PC CurrentSince Oct 20, 2025 Accepting new patients
Banner - University Medical Center Tucson Campus LLC Past Accepting new patients
Banner - University Medical Center South Campus LLC Past Accepting new patients

Locations

6236 E Pima St
Ste 100
Tucson, AZ 85712
Phone (520) 327-6874

2055 W Hospital Dr
Tucson, AZ 85704
Phone (520) 547-5725

5055 E Broadway Blvd
Ste A100
Tucson, AZ 85711
Phone (520) 327-0460

535 N Wilmot Rd
Ste 101
Tucson, AZ 85711
Phone (520) 694-9988

1501 N Campbell Ave
Ste 6336
Tucson, AZ 85724
Phone (520) 626-4555

6236 E Pima St
Tucson, AZ 85712
Phone (520) 327-6874

1625 N Campbell Ave
Tucson, AZ 85719

2800 E Ajo Way
Tucson, AZ 85713
Phone (520) 294-4471

Interoperability endpoints

  • Direct secure messaging: mso21914@azacp.direct-ci.com

Organizations & group practices 7

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.

Hospital & facility affiliations 6

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

NPI Registry JSON

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

{
    "created_epoch": "1554768000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1781827200000",
    "number": "1669935441",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "4801 E BROADWAY BLVD STE 251",
            "city": "TUCSON",
            "state": "AZ",
            "postal_code": "857112700",
            "telephone_number": "520-327-0460",
            "fax_number": "520-795-0225"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "6236 E PIMA ST STE 100",
            "city": "TUCSON",
            "state": "AZ",
            "postal_code": "857123164",
            "telephone_number": "520-327-6874",
            "fax_number": "520-327-0028"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "SO",
        "first_name": "MEI",
        "middle_name": "LAI",
        "credential": "MD",
        "sole_proprietor": "YES",
        "sex": "F",
        "enumeration_date": "2019-04-09",
        "last_updated": "2026-06-19",
        "certification_date": "2026-06-19",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "AZ",
            "license": "65443",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Tucson, AZ

Sources for this page

Verify at the official NPI Registry.