William Weiss, MD, PC
NPI 1881686368 · Nephrology Physician · Phoenix, AZ
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Weiss, MD, PC is a Nephrology Physician provider in Phoenix, AZ (NPI 1881686368).
Provider details
- NPI number
- 1881686368
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD, PC
- Sex
- Male
- Sole proprietor
- No
- License
- 31284 (AZ)
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
2,702 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) |
|---|---|---|
| Management Using the Results of Remote Vital Sign Monitoring Per Calendar Month, Each Additional 20 Minutes99458 | 709 | $37 |
| Chronic Care Management Services for Two Or More Chronic Conditions, Additional 20 Minutes of Clinical Staff Time Directed By Health Care Professional, Per Calendar Month99439 | 527 | $46 |
| Management Using the Results of Remote Vital Sign Monitoring Per Calendar Month, First 20 Minutes99457 | 400 | $47 |
| Remote Monitoring of Physiologic Parameters, Initial Supply of Devices With Daily Recordings Or Programmed Alerts Transmission, Each 30 Days99454 | 385 | $45 |
| Chronic Care Management Services, First 20 Minutes of Clinical Staff Time Directed By Health Care Professional, Per Calendar Month99490 | 293 | $60 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 33 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Furosemide | 250 | 81 |
| Amlodipine Besylate | 237 | 73 |
| Losartan Potassium | 223 | 74 |
| Calcitriol | 169 | 48 |
| Patiromer Calcium Sorbitexbrand: Veltassa | 113 | 26 |
| Allopurinol | 104 | 29 |
| Lisinopril | 102 | 31 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,411 across 47 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
- 2005-08-19
- Last updated
- 2020-08-21
- Certified
- 2020-08-21
Frequently asked questions
- What is William Weiss's NPI number?
- William Weiss's National Provider Identifier (NPI) is 1881686368, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Weiss's specialty?
- William Weiss is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is William Weiss located?
- William Weiss's practice location on file with NPPES is 9321 W Thomas Rd, Phoenix, AZ 85037-3399.
- What is William Weiss's phone number?
- The practice phone number listed in the NPPES registry for William Weiss is (623) 537-5100.
- Does William Weiss accept Medicare?
- William Weiss is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Weiss's NPI active?
- Yes — William Weiss's NPI (1881686368) is active in the NPPES registry as of the last update on 2020-08-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.