Wai Chung Yong, MD
NPI 1740695790 · Rheumatology Physician · Alhambra, CA
Enrolled with Medicare as Practitioner - Rheumatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Wai Chung Yong, MD is a Rheumatology Physician provider in Alhambra, CA (NPI 1740695790).
Provider details
- NPI number
- 1740695790
- Entity type
- Individual
- Primary specialty
- Rheumatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A175526 (CA)
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
11 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
104 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) |
|---|---|---|
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 37 | $179 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 36 | $139 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 31 | $98 |
Typical Medicare-allowed amounts for these services range $98–$179 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 20 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Hydroxychloroquine Sulfate | 199 | 70 |
| Prednisone | 153 | 64 |
| Methotrexate Sodiumbrand: Methotrexate | 94 | 30 |
| Gabapentin | 47 | 25 |
| Sulfasalazine | 41 | 17 |
| Alendronate Sodium | 33 | 12 |
| Allopurinol | 32 | 12 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$328 across 10 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
- 2014-06-29
- Last updated
- 2022-12-01
- Certified
- 2022-12-01
Frequently asked questions
- What is Wai Chung Yong's NPI number?
- Wai Chung Yong's National Provider Identifier (NPI) is 1740695790, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Wai Chung Yong's specialty?
- Wai Chung Yong is listed in the NPPES registry with a primary specialty of Rheumatology Physician (Allopathic & Osteopathic Physicians).
- Where is Wai Chung Yong located?
- Wai Chung Yong's practice location on file with NPPES is 925 S Garfield Ave, Alhambra, CA 91801-4442.
- What is Wai Chung Yong's phone number?
- The practice phone number listed in the NPPES registry for Wai Chung Yong is (626) 282-0282.
- Does Wai Chung Yong accept Medicare?
- Wai Chung Yong is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Wai Chung Yong's NPI active?
- Yes — Wai Chung Yong's NPI (1740695790) is active in the NPPES registry as of the last update on 2022-12-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.