Tony Chien, D.O.
NPI 1477617025 · Orthopaedic Surgery Physician · Saint Louis, MO
Enrolled with Medicare as Practitioner - Orthopedic Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Tony Chien, D.O. is a Orthopaedic Surgery Physician provider in Saint Louis, MO (NPI 1477617025).
Provider details
- NPI number
- 1477617025
- Entity type
- Individual
- Primary specialty
- Orthopaedic Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- No
- License
- 10081 (ND)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
2,748 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 1,273 | $114 |
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 606 | $96 |
| Aspiration And/Or Injection of Fluid From Large Joint20610 | 398 | $58 |
| Injection of Trigger Points, 3 Or More Muscles20553 | 201 | $53 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 80 | $148 |
| Injection Into Tendon at Attachment to Bone Or Muscle20551 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 23 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 1,793 | 227 |
| Diclofenac Sodium | 935 | 99 |
| Tizanidine Hcl | 887 | 94 |
| Celecoxib | 846 | 113 |
| Tramadol Hcl | 493 | 98 |
| Gabapentin | 362 | 47 |
| Oxycodone Hcl | 292 | 41 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-12-20
- Last updated
- 2023-12-21
- Certified
- 2023-12-21
Frequently asked questions
- What is Tony Chien's NPI number?
- Tony Chien's National Provider Identifier (NPI) is 1477617025, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Tony Chien's specialty?
- Tony Chien is listed in the NPPES registry with a primary specialty of Orthopaedic Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Tony Chien located?
- Tony Chien's practice location on file with NPPES is 2821 N Ballas Rd Ste C20, Saint Louis, MO 63131-2300.
- What is Tony Chien's phone number?
- The practice phone number listed in the NPPES registry for Tony Chien is (636) 778-9341.
- Does Tony Chien accept Medicare?
- Tony Chien is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Tony Chien's NPI active?
- Yes — Tony Chien's NPI (1477617025) is active in the NPPES registry as of the last update on 2023-12-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.