Ray Zhao, D.O.
NPI 1558595967 · Emergency Medicine Physician · San Dimas, CA
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ray Zhao, D.O. is a Emergency Medicine Physician provider in San Dimas, CA (NPI 1558595967).
Provider details
- NPI number
- 1558595967
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 20A10792 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
17 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
137 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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 102 | $99 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 21 | $9 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Tracing93005 | 14 | $7 |
Typical Medicare-allowed amounts for these services range $7–$99 (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 · 10 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 78 | 77 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 58 | 52 |
| Cephalexin | 42 | 42 |
| Ciprofloxacin Hcl | 38 | 38 |
| Azithromycin | 31 | 31 |
| Cefpodoxime Proxetil | 20 | 20 |
| Prednisone | 17 | 17 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2009-05-13
- Last updated
- 2021-12-02
- Certified
- 2021-12-02
Frequently asked questions
- What is Ray Zhao's NPI number?
- Ray Zhao's National Provider Identifier (NPI) is 1558595967, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ray Zhao's specialty?
- Ray Zhao is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Ray Zhao located?
- Ray Zhao's practice location on file with NPPES is 1350 W Covina Blvd, San Dimas, CA 91773-3245.
- What is Ray Zhao's phone number?
- The practice phone number listed in the NPPES registry for Ray Zhao is (626) 872-3457.
- Does Ray Zhao accept Medicare?
- Ray Zhao is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ray Zhao's NPI active?
- Yes — Ray Zhao's NPI (1558595967) is active in the NPPES registry as of the last update on 2021-12-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.