Michael Cao
NPI 1649638628 · Emergency Medicine Physician · Chino, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Michael Cao is a Emergency Medicine Physician provider in Chino, CA (NPI 1649638628).
Provider details
- NPI number
- 1649638628
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- No
- License
- 20A15412 (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
10 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
11 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 | 11 | $85 |
Typical Medicare-allowed amounts for these services range $85–$85 (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 · 18 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 52 | 51 |
| Azithromycin | 49 | 48 |
| Cephalexin | 44 | 44 |
| Prednisone | 43 | 42 |
| Triamcinolone Acetonide | 33 | 32 |
| Tramadol Hcl | 30 | 30 |
| Cefadroxil | 28 | 28 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2016-02-04
- Last updated
- 2021-12-01
Frequently asked questions
- What is Michael Cao's NPI number?
- Michael Cao's National Provider Identifier (NPI) is 1649638628, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Cao's specialty?
- Michael Cao is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Michael Cao located?
- Michael Cao's practice location on file with NPPES is 5451 Walnut Ave, Chino, CA 91710-2609.
- What is Michael Cao's phone number?
- The practice phone number listed in the NPPES registry for Michael Cao is (909) 464-8600.
- Does Michael Cao accept Medicare?
- Michael Cao is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Michael Cao's NPI active?
- Yes — Michael Cao's NPI (1649638628) is active in the NPPES registry as of the last update on 2021-12-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.