Tien I Su, M.D.
NPI 1750581930 · Rheumatology Physician · Whittier, CA
Enrolled with Medicare as Practitioner - Rheumatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Tien I Su, M.D. is a Rheumatology Physician provider in Whittier, CA (NPI 1750581930).
Provider details
- NPI number
- 1750581930
- Entity type
- Individual
- Primary specialty
- Rheumatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- A98890 (CA)
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 tenure25% of score
18 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,581 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 419 | $138 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 273 | $17 |
| Administration of Non-Hormonal Anti-Neoplastic Chemotherapy Under Skin Or Into Muscle96401 | 249 | $82 |
| Chronic Care Management Services, First 20 Minutes of Clinical Staff Time Directed By Health Care Professional, Per Calendar Month99490 | 245 | $67 |
| Chronic Care Management Services for Two Or More Chronic Conditions, Additional 20 Minutes of Clinical Staff Time Directed By Health Care Professional, Per Calendar Month99439 | 113 | $52 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 26 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Alendronate Sodium | 91 | 50 |
| Gabapentin | 87 | 46 |
| Diclofenac Sodium | 78 | 34 |
| Methotrexate Sodiumbrand: Methotrexate | 72 | 37 |
| Hydroxychloroquine Sulfate | 62 | 31 |
| Folic Acid | 50 | 14 |
| Duloxetine Hcl | 41 | 19 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$8,529 across 25 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
Registry dates
- Enumerated
- 2007-07-25
- Last updated
- 2016-01-05
Frequently asked questions
- What is Tien I Su's NPI number?
- Tien I Su's National Provider Identifier (NPI) is 1750581930, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Tien I Su's specialty?
- Tien I Su is listed in the NPPES registry with a primary specialty of Rheumatology Physician (Allopathic & Osteopathic Physicians).
- Where is Tien I Su located?
- Tien I Su's practice location on file with NPPES is 12456 Washington Blvd, Whittier, CA 90602-1005.
- What is Tien I Su's phone number?
- The practice phone number listed in the NPPES registry for Tien I Su is (562) 758-6600.
- Does Tien I Su accept Medicare?
- Tien I Su is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Tien I Su's NPI active?
- Yes — Tien I Su's NPI (1750581930) is active in the NPPES registry as of the last update on 2016-01-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.