Mark Hsiao, M.D.
NPI 1114008984 · Orthopaedic Surgery of the Spine Physician · Alhambra, CA
Enrolled with Medicare as Practitioner - Orthopedic Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Hsiao, M.D. is a Orthopaedic Surgery of the Spine Physician provider in Alhambra, CA (NPI 1114008984).
Provider details
- NPI number
- 1114008984
- Entity type
- Individual
- Primary specialty
- Orthopaedic Surgery of the Spine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- MD61024463 (WA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
292 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. 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 .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Electrical Stimulation (unattended), to One Or More Areas for Indication(s) Other Than Wound Care, As Part of a Therapy Plan of CareG0283 | 88 | $9 |
| Therapy Procedure Using Exercise to Develop Strength, Endurance, Range of Motion, and Flexibility, Each 15 Minutes97110 | 86 | $28 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 48 | $98 |
| Therapy Procedure Using Manual Technique, Each 15 Minutes97140 | 44 | $22 |
| X-Ray of Lower and Sacral Spine, 2-3 Views72100 | 15 | $45 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 6 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Celecoxib | 447 | 219 |
| Gabapentin | 385 | 196 |
| Meloxicam | 173 | 102 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 37 | 31 |
| Ondansetron Hcl | 29 | 26 |
| Tramadol Hcl | 20 | 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 , 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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$749 across 12 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 325 9th AveSeattle, WA 98104-2420Phone: (206) 520-5000
Registry dates
- Enumerated
- 2006-10-18
- Last updated
- 2024-05-07
- Certified
- 2022-02-10
Frequently asked questions
- What is Mark Hsiao's NPI number?
- Mark Hsiao's National Provider Identifier (NPI) is 1114008984, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Hsiao's specialty?
- Mark Hsiao is listed in the NPPES registry with a primary specialty of Orthopaedic Surgery of the Spine Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Hsiao located?
- Mark Hsiao's practice location on file with NPPES is 707 S Garfield Ave Fl 2, Alhambra, CA 91801-5859.
- What is Mark Hsiao's phone number?
- The practice phone number listed in the NPPES registry for Mark Hsiao is (626) 282-1600.
- Does Mark Hsiao accept Medicare?
- Mark Hsiao is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Hsiao's NPI active?
- Yes — Mark Hsiao's NPI (1114008984) is active in the NPPES registry as of the last update on 2024-05-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.