Theresa Hsiao, DO
NPI 1578943544 · Emergency Medicine Physician · Philadelphia, PA
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Theresa Hsiao, DO is a Emergency Medicine Physician provider in Philadelphia, PA (NPI 1578943544).
Provider details
- NPI number
- 1578943544
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Female
- Sole proprietor
- No
- License
- OT016588 (PA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
11 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 4 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 29 | 29 |
| Ondansetron Hcl | 22 | 22 |
| Cephalexin | 18 | 18 |
| Ibuprofen | 11 | 11 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2015-06-04
- Last updated
- 2021-12-08
Frequently asked questions
- What is Theresa Hsiao's NPI number?
- Theresa Hsiao's National Provider Identifier (NPI) is 1578943544, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Theresa Hsiao's specialty?
- Theresa Hsiao is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Theresa Hsiao located?
- Theresa Hsiao's practice location on file with NPPES is 5501 Old York Rd, Philadelphia, PA 19141-3018.
- What is Theresa Hsiao's phone number?
- The practice phone number listed in the NPPES registry for Theresa Hsiao is (215) 456-3834.
- Does Theresa Hsiao accept Medicare?
- Theresa Hsiao is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Theresa Hsiao's NPI active?
- Yes — Theresa Hsiao's NPI (1578943544) is active in the NPPES registry as of the last update on 2021-12-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.