Joanna Maack, M.D.
NPI 1235381831ActiveIndividual· Emergency Medicine· Pasadena, CA
Emergency Medicine (M.D.) in Pasadena, California, trained at Icahn School of Medicine at Mount Sinai (class of 2005). 287 Medicare patients in 2024, $35,869 paid; nearly all of their 168 Part D prescriptions were generic (92%).
Overview
| NPI | 1235381831 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Oct 15, 2008 |
| Last updated in NPPES | Mar 12, 2015 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Emergency Medicine Primary | 207P00000X | A109849 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Emergency Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 287 |
|---|---|
| Services billed | 514 across 68 procedure codes |
| Paid by Medicare | $35,869 |
Part D prescriptions in 2024
| Prescriptions (claims) | 168 · 170 30-day fills |
|---|---|
| Patients | 114 |
| Total drug cost | $3,376 |
| Generic share | 92% of claims |
Education and affiliations
| Medical school | Icahn School of Medicine at Mount Sinai |
|---|---|
| Graduation year | 2005 |
| Medicare specialty | Emergency Medicine |
Medical groups
- Exer Medical CorporationHighland, CA · 340 clinicians
- Hmh Emergency Medical Group, Inc.Pasadena, CA · 60 clinicians
Hospital affiliation
- Huntington HospitalPasadena, CA
Other facilities
- Giving Hands Home Health Care, IncHome health agency · Encino, CA
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 57 emergency medicine physicians in Pasadena · All emergency medicine physicians in California