Thomas Cao, MD
NPI 1194797266 · Hematology & Oncology Physician · Elgin, IL
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Thomas Cao, MD is a Hematology & Oncology Physician provider in Elgin, IL (NPI 1194797266).
Provider details
- NPI number
- 1194797266
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 036098274 (IL)
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
20 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
895 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 | 415 | $131 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 207 | $184 |
| Insertion of Needle Into Vein (3 Years Or Older)36410 | 190 | $18 |
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 | 38 | $58 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 33 | $93 |
| 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'S |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 40 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 157 | 55 |
| Metoprolol Succinate | 76 | 21 |
| Pantoprazole Sodium | 68 | 31 |
| Cephalexin | 64 | 36 |
| Losartan Potassium | 59 | 24 |
| Lisinopril | 57 | 17 |
| Amlodipine Besylate | 56 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$715 across 28 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
- 2006-02-03
- Last updated
- 2019-03-25
Frequently asked questions
- What is Thomas Cao's NPI number?
- Thomas Cao's National Provider Identifier (NPI) is 1194797266, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Thomas Cao's specialty?
- Thomas Cao is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Thomas Cao located?
- Thomas Cao's practice location on file with NPPES is 1435 North Randall Road, Elgin, IL 60123.
- What is Thomas Cao's phone number?
- The practice phone number listed in the NPPES registry for Thomas Cao is (847) 717-6860.
- Does Thomas Cao accept Medicare?
- Thomas Cao is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Thomas Cao's NPI active?
- Yes — Thomas Cao's NPI (1194797266) is active in the NPPES registry as of the last update on 2019-03-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.