Clifford Wong, MD
NPI 1780621706 · Nephrology Physician · Hayward, CA
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Clifford Wong, MD is a Nephrology Physician provider in Hayward, CA (NPI 1780621706).
Provider details
- NPI number
- 1780621706
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A68265 (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
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
2,101 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) |
|---|---|---|
| Dialysis Services, 4 Or More Physician Visits Per Month (20 Years Or Older)90960 | 361 | $401 |
| 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 | 333 | $18 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 316 | $131 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 301 | $87 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 196 | $212 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 29 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Losartan Potassium | 180 | 63 |
| Hydralazine Hcl | 134 | 48 |
| Dapagliflozin Propanediolbrand: Farxiga | 117 | 33 |
| Calcifediolbrand: Rayaldee | 76 | 12 |
| Lisinopril | 74 | 31 |
| Empagliflozinbrand: Jardiance | 74 | 22 |
| Calcitriol |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$975 across 51 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
- 2006-05-31
- Last updated
- 2022-11-28
- Certified
- 2022-11-28
Frequently asked questions
- What is Clifford Wong's NPI number?
- Clifford Wong's National Provider Identifier (NPI) is 1780621706, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Clifford Wong's specialty?
- Clifford Wong is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Clifford Wong located?
- Clifford Wong's practice location on file with NPPES is 27200 Calaroga Ave, Hayward, CA 94545-4339.
- What is Clifford Wong's phone number?
- The practice phone number listed in the NPPES registry for Clifford Wong is (510) 783-2003.
- Does Clifford Wong accept Medicare?
- Clifford Wong is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Clifford Wong's NPI active?
- Yes — Clifford Wong's NPI (1780621706) is active in the NPPES registry as of the last update on 2022-11-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.