Stephen Wong, M.D.
NPI 1104977008 · Allergy Physician · Hacienda Heights, CA
Enrolled with Medicare as Practitioner - Allergy/Immunology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Stephen Wong, M.D. is a Allergy Physician provider in Hacienda Heights, CA (NPI 1104977008).
Provider details
- NPI number
- 1104977008
- Entity type
- Individual
- Primary specialty
- Allergy PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- G51644 (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
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
5,446 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) |
|---|---|---|
| Test for Allergy Using Allergenic Extract95004 | 1,838 | $4 |
| Professional Service for Preparation and Provision of 1 Or More Antigens95165 | 1,195 | $17 |
| Test for Allergy Using Skin Patch95044 | 1,152 | $6 |
| Professional Service for Multiple Injections of Allergen95117 | 546 | $14 |
| Test for Allergy Using Allergenic Extract Injected Into Skin95024 | 207 | $9 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 142 | $98 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 34 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Fluticasone Propionate | 268 | 105 |
| Famotidine | 147 | 52 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 143 | 81 |
| Montelukast Sodium | 132 | 45 |
| Azelastine Hcl | 107 | 43 |
| Triamcinolone Acetonide | 61 | 41 |
| Beclomethasone Dipropionatebrand: Qvar Redihaler | 60 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$9,182 across 26 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 (2)
- 330 S Garfield Ave Ste 116Alhambra, CA 91801-3893Phone: (626) 284-3400
- 207 S Santa Anita St Ste 335San Gabriel, CA 91776-1160Phone: (760) 941-4444Fax: (760) 941-8902
Registry dates
- Enumerated
- 2007-01-16
- Last updated
- 2026-05-29
- Certified
- 2026-05-29
Frequently asked questions
- What is Stephen Wong's NPI number?
- Stephen Wong's National Provider Identifier (NPI) is 1104977008, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Stephen Wong's specialty?
- Stephen Wong is listed in the NPPES registry with a primary specialty of Allergy Physician (Allopathic & Osteopathic Physicians).
- Where is Stephen Wong located?
- Stephen Wong's practice location on file with NPPES is 1850 S Azusa Ave, Hacienda Heights, CA 91745-6813.
- What is Stephen Wong's phone number?
- The practice phone number listed in the NPPES registry for Stephen Wong is (626) 810-5450.
- Does Stephen Wong accept Medicare?
- Stephen Wong is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Stephen Wong's NPI active?
- Yes — Stephen Wong's NPI (1104977008) is active in the NPPES registry as of the last update on 2026-05-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.