Mark T Callesen MD PC
Mark T Callesen MD PC is a healthcare organization registered as Psychiatric Residential Treatment Facility in Mesa, AZ, holding Type 2 (organization) NPI 1588727259 since 2006. The authorized official on file is Mark Callesen, President.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1588727259 |
|---|---|
| Entity type | Organization (Type 2) |
| Legal business name | Mark T Callesen MD PC |
| Practice address | 1201 S ALMA SCHOOL RD, SUITE 11750, Mesa, AZ, 85210 |
| Phone | 4804644606 |
| Fax | 4804640613 |
| Enumeration date | 2006-12-17 |
| Last updated in NPPES | 2020-08-22 |
Authorized official
| Name | Mark Callesen |
|---|---|
| Title | President |
| Phone | 4804644606 |
Taxonomy & classification
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 323P00000X | Psychiatric Residential Treatment Facility | Primary | 23058 | AZ |
Copy-ready billing details
Provider: Mark T Callesen MD PC NPI: 1588727259 Taxonomy: 323P00000X (Psychiatric Residential Treatment Facility) Address: 1201 S ALMA SCHOOL RD, SUITE 11750, Mesa, AZ, 85210
Providers at this address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1457345472 | Thomas Hall | Individual | Clinical Social Worker | Mesa, AZ |
| 1568451359 | Michael Kornreich | Individual | Diagnostic Radiology Physician | Mesa, AZ |
| 1912996638 | Penny Bowen | Individual | Diagnostic Radiology Physician | Mesa, AZ |
| 1477511103 | Stephen Anthony | Individual | Clinical Psychologist | Mesa, AZ |
| 1447277264 | Stateserv Homecare LLC | Organization | Durable Medical Equipment & Medical Supplies | Mesa, AZ |
| 1396833141 | Curtis Anderson | Individual | Clinical Psychologist | Mesa, AZ |
| 1588821763 | Holly Lawder | Individual | Diagnostic Radiology Physician | Mesa, AZ |
| 1932980885 | James Hartwell | Individual | Psychiatric/Mental Health Nurse Practitioner | Mesa, AZ |
Verify this record
Cross-check NPI 1588727259 against the authoritative CMS record: view Mark T Callesen MD PC on the official NPPES registry .
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes — even if the provider moves or changes specialty. Read the full guide or validate an NPI number.
Frequently asked questions
What type of organization is Mark T Callesen MD PC?
What is a Type 2 NPI?
Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2020-08-22.