Sarah Johanna Carstens, M.D.

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

43273 Issued in AZ

Practice address

8913 N 19TH Ave
Phoenix, AZ 85021-4206

Phone

(602) 858-4361

Fax

(480) 906-2176

NPI assigned

Jun 19, 2007

Last updated

Aug 20, 2026By the provider in NPPES

Sex

Female

Sole proprietor

Yes

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

Specialties & licenses 2

Addresses

Medicare fee-for-service enrollment

Enrolled in AZ

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

Internal Medicine

Education

University of Arizona College of Medicine, 2007

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Circle the CityGroup PAC ID 3971824442, 63 clinicians

Practice addresses (Care Compare)

Merit-based Incentive Payment System (MIPS)

Final score

88.53 of 100Reported as group

Quality

78.73

Promoting interoperability

98

Improvement activities

40

Cost

62.46

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: sarah.carstens.1@11818.direct.athenahealth.com

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.

• Circle the City

  • Family Medicine Physician
  • Phoenix, AZ
  • NPI 1346588316

  Internal Medicine

  Medicare reassignment Care Compare group NPD
• Banner - University Hospital Based Physicians LLC

  • General Acute Care Hospital
  • Phoenix, AZ
  • NPI 1750751566
  Medicare reassignment NPD
• Banner Cancer Center Specialists LLC

  • Oncology Clinic/Center
  • Phoenix, AZ
  • NPI 1518253152
  Medicare reassignment NPD
• Banner Hospital Based Physicians Arizona LLC

  • Multi-Specialty Clinic/Center
  • San Tan Valley, AZ
  • NPI 1275889891
  Medicare reassignment NPD
• Archwell Health Professional Services of Arizona, LLC

  • Internal Medicine Physician
  • Mesa, AZ
  • NPI 1558026880
  NPD
• Banner - University Hospital Based Physicians LLC

  • Multi-Specialty Clinic/Center
  • Phoenix, AZ
  • NPI 1538879481
  NPD
• Banner Cancer Center Specialists LLC

  • Oncology Clinic/Center
  • Payson, AZ
  • NPI 1588158448
  NPD
• Banner Hospital Based Physicians Arizona LLC

  • Multi-Specialty Clinic/Center
  • Gilbert, AZ
  • NPI 1124374822
  NPD
• Banner Hospital Based Physicians Arizona LLC

  • Critical Care Medicine (Internal Medicine) Physician
  • Phoenix, AZ
  • NPI 1780445171
  NPD
• Circle the City

  dba Circle the City Pharmacy

  • Community/Retail Pharmacy
  • Phoenix, AZ
  • NPI 1144093972
  NPD
• Circle the City

  • Federally Qualified Health Center (FQHC)
  • Phoenix, AZ
  • NPI 1679954184
  NPD
• Circle the City

  dba Circle the City Family Health Center, Downtown Campus

  • Federally Qualified Health Center (FQHC)
  • Phoenix, AZ
  • NPI 1548775570
  NPD (past)

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

{
    "created_epoch": "1182211200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1787184000000",
    "number": "1952506867",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "102 WOODMONT BLVD STE 600",
            "city": "NASHVILLE",
            "state": "TN",
            "postal_code": "372055250",
            "telephone_number": "888-987-1151"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "8913 N 19TH AVE",
            "city": "PHOENIX",
            "state": "AZ",
            "postal_code": "850214206",
            "telephone_number": "602-858-4361",
            "fax_number": "480-906-2176"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "1111 E McDowell Rd",
            "address_purpose": "LOCATION",
            "city": "Phoenix",
            "state": "AZ",
            "postal_code": "850062612",
            "country_code": "US",
            "telephone_number": "602-000-0000",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "CARSTENS",
        "first_name": "SARAH",
        "middle_name": "JOHANNA",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "YES",
        "sex": "F",
        "enumeration_date": "2007-06-19",
        "last_updated": "2026-08-20",
        "certification_date": "2026-08-20",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "AZ",
            "license": "43273",
            "primary": true
        },
        {
            "code": "208M00000X",
            "taxonomy_group": "",
            "desc": "Hospitalist",
            "state": "AZ",
            "license": "43273",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Elizabeth A. Carson, DO
• Ian Alan Carson, OTR/L
• Kristopher Carson, RPH
• Tawni Candace Carson, PRSS, BHT
• Victoria Laine Carson, MS CCC/SLP
• Amanda Carswell, LPC, NCC
• Kimberly Nichole Carswell, RN
• Cart T. Haden Medical Center
• Zulaica Cartagena Leon, MSN
• Jesse A Cartagena

• Internal Medicine Physician in Phoenix, AZ
• Providers in Phoenix, AZ by specialty
• Internal Medicine Physician in Arizona

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 20, 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.