NPIMap

Individual provider Active NPI

Megan McGuinness Masten, MD

  • Obstetrics & Gynecology Physician
  • Portland, ME
National Provider Identifier
1730642463
Registry record updated Jul 30, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Obstetrics & Gynecology PhysicianTaxonomy code 207V00000X
License
MD29683 Issued in ME
Practice address
887 Congress St Ste 200
Portland, ME 04102-3166
Phone
(207) 771-5549
Fax
(207) 771-7834
NPI assigned
Apr 10, 2019
Last updated
Jul 30, 2025By the provider in NPPES
Sex
Female
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Jul 30, 2025

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

Specialties & licenses 3

Specialty (taxonomy)CodeLicenseStatePrimary
Obstetrics & Gynecology Physician 207V00000X MD29683 ME Primary
Obstetrics & Gynecology Physician 207V00000X DR.0070498 CO
Complex Family Planning Physician 207VC0300X MD29683 ME

Addresses

Primary practice location

887 Congress St Ste 200
Portland, ME 04102-3166

Mailing address

887 Congress St Ste 200
Portland, ME 04102-3166
Phone (207) 771-5549

Other practice location 1

1635 Aurora Ct
Aurora, CO 80045-2541
Phone (720) 848-0000

Other practice location 2

22 Bramhall St
Portland, ME 04102-3134
Phone (207) 662-5400

Other practice location 3

777 Bannock St
Denver, CO 80204-4597
Phone (303) 436-4949

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in CO, ME2 enrollments
Eligible to order & refer
  • Part B services
  • Medical equipment
  • Home health
  • Power mobility devices
  • Hospice
Green means eligible to order or refer.

Enrollment records 2

Enrollment IDStateProvider typePAC IDDetails
I20230815002441 CO Practitioner - Obstetrics/Gynecology 2365776341 Reassigns benefits to 1 organization
I20250807000555 ME Practitioner - Obstetrics/Gynecology 2365776341 Reassigns benefits to 1 organization

Care Compare profile

Medicare Care Compare
Specialty
Obstetrics/Gynecology
Education
Other, 2019
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
MainehealthGroup PAC ID 7517860588, 2,616 clinicians

Practice addresses (Care Compare)

22 Bramhall St
Portland, ME 04102-3134
Phone (207) 885-9905

887 Congress St
Suite 200
Portland, ME 04102-3166
Phone (207) 771-5549

Hospital & facility affiliations

National Provider Directory

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

State licenses

LicenseStateTypeSpecialty
DR.0070498COMDObstetrics & Gynecology Physician
MD29683MEMDObstetrics & Gynecology Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Mainehealth CurrentSince Sep 29, 2025 Accepting new patients
Denver Health and Hospital Authority CurrentSince Jul 19, 2023 Accepting new patients
Mainehealth CurrentSince Sep 29, 2025 Accepting new patients
Denver Health and Hospital Authority CurrentSince Jul 19, 2023 Accepting new patients
Mainehealth Current Accepting new patients
University Physicians Incorporated Obstetrics & Gynecology Current Accepting new patients
Mainehealth Past Accepting new patients
Mainehealth Obstetrics & Gynecology Past Accepting new patients
Mainehealth Past Accepting new patients

Locations

12605 E 16th Ave
Aurora, CO 80045
Phone (720) 848-0006

12631 E 17th Ave
Rm 4007
Aurora, CO 80045
Phone (303) 724-2052

13123 E 16th Ave
Aurora, CO 80045
Phone (720) 777-3846

1635 Aurora Ct
Aurora, CO 80045
Phone (720) 848-1060

777 Bannock St
Denver, CO 80204

Dept 1061
Denver, CO 80256

22 Bramhall St
Portland, ME 04102
Phone (207) 662-2179

887 Congress St
Ste 200
Portland, ME 04102
Phone (207) 771-5549

Organizations & group practices 9

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.

Hospital & facility affiliations 36

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

View all 36

NPI Registry JSON

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

{
    "created_epoch": "1554854400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1753833600000",
    "number": "1730642463",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "887 CONGRESS ST STE 200",
            "city": "PORTLAND",
            "state": "ME",
            "postal_code": "041023166",
            "telephone_number": "207-771-5549",
            "fax_number": "207-771-7834"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "887 CONGRESS ST STE 200",
            "city": "PORTLAND",
            "state": "ME",
            "postal_code": "041023166",
            "telephone_number": "207-771-5549",
            "fax_number": "207-771-7834"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "1635 Aurora Ct",
            "address_purpose": "LOCATION",
            "city": "Aurora",
            "state": "CO",
            "postal_code": "800452541",
            "country_code": "US",
            "telephone_number": "720-848-0000",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "22 Bramhall St",
            "address_purpose": "LOCATION",
            "city": "Portland",
            "state": "ME",
            "postal_code": "041023134",
            "country_code": "US",
            "telephone_number": "207-662-5400",
            "fax_number": "207-662-6219",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "777 Bannock St",
            "address_purpose": "LOCATION",
            "city": "Denver",
            "state": "CO",
            "postal_code": "802044597",
            "country_code": "US",
            "telephone_number": "303-436-4949",
            "fax_number": "303-602-9150",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "MASTEN",
        "first_name": "MEGAN",
        "middle_name": "MCGUINNESS",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2019-04-10",
        "last_updated": "2025-07-30",
        "certification_date": "2025-07-30",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207V00000X",
            "taxonomy_group": "",
            "desc": "Obstetrics & Gynecology",
            "state": "ME",
            "license": "MD29683",
            "primary": true
        },
        {
            "code": "207V00000X",
            "taxonomy_group": "",
            "desc": "Obstetrics & Gynecology",
            "state": "CO",
            "license": "DR.0070498",
            "primary": false
        },
        {
            "code": "207VC0300X",
            "taxonomy_group": "",
            "desc": "Obstetrics & Gynecology, Complex Family Planning",
            "state": "ME",
            "license": "MD29683",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Portland, ME

Sources for this page

Verify at the official NPI Registry.