Zhengjin Cao, M.D.
NPI 1861616039 · Internal Medicine Physician · Dubuque, IA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Zhengjin Cao, M.D. is a Internal Medicine Physician provider in Dubuque, IA (NPI 1861616039).
Provider details
- NPI number
- 1861616039
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 37147 (IA)
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
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
5,152 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) |
|---|---|---|
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 559 | $9 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 541 | $118 |
| Blood Test, Basic Group of Blood Chemicals (calcium, Total)80048 | 435 | $8 |
| Liver Enzyme (sgpt), Level84460 | 346 | $5 |
| 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'SG2211 | 287 | $15 |
| Hemoglobin A1c Level83036 | 280 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 212 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 1,090 | 251 |
| Omeprazole | 803 | 189 |
| Potassium Chloride | 654 | 165 |
| Losartan Potassium | 607 | 154 |
| Furosemide | 594 | 147 |
| Amlodipine Besylate | 557 | 157 |
| Levothyroxine Sodium | 544 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$148 across 9 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
- 2007-04-12
- Last updated
- 2021-04-06
- Certified
- 2021-04-06
Frequently asked questions
- What is Zhengjin Cao's NPI number?
- Zhengjin Cao's National Provider Identifier (NPI) is 1861616039, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Zhengjin Cao's specialty?
- Zhengjin Cao is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Zhengjin Cao located?
- Zhengjin Cao's practice location on file with NPPES is 1515 Delhi St, Dubuque, IA 52001-6320.
- What is Zhengjin Cao's phone number?
- The practice phone number listed in the NPPES registry for Zhengjin Cao is (563) 557-9111.
- Does Zhengjin Cao accept Medicare?
- Zhengjin Cao is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Zhengjin Cao's NPI active?
- Yes — Zhengjin Cao's NPI (1861616039) is active in the NPPES registry as of the last update on 2021-04-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.