Willy Singh, D.O.
NPI 1265587075 · Nephrology Physician · Whittier, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Willy Singh, D.O. is a Nephrology Physician provider in Whittier, CA (NPI 1265587075).
Provider details
- NPI number
- 1265587075
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- No
- License
- 5399 (AZ)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
1,200 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 711 | $77 |
| Critical Care, First 30-74 Minutes99291 | 131 | $206 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 116 | $170 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 83 | $116 |
| Dialysis Services, 2-3 Physician Visits Per Month (20 Years Or Older)90961 | 54 | $290 |
| Dialysis Services, 4 Or More Physician Visits Per Month (20 Years Or Older)90960 | 39 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 26 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Hydralazine Hcl | 91 | 19 |
| Furosemide | 72 | 28 |
| Amlodipine Besylate | 71 | 20 |
| Parenteral Amino Acid 20% No.1brand: Prosol | 70 | — |
| Nifedipinebrand: Nifedipine Er | 59 | 18 |
| Dapagliflozin Propanediolbrand: Farxiga | 50 | 14 |
| Lisinopril | 46 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$179 across 5 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
- 2007-01-24
- Last updated
- 2016-04-26
Frequently asked questions
- What is Willy Singh's NPI number?
- Willy Singh's National Provider Identifier (NPI) is 1265587075, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Willy Singh's specialty?
- Willy Singh is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Willy Singh located?
- Willy Singh's practice location on file with NPPES is 12401 Washington Blvd, Whittier, CA 90602-1006.
- What is Willy Singh's phone number?
- The practice phone number listed in the NPPES registry for Willy Singh is (562) 698-0811.
- Does Willy Singh accept Medicare?
- Willy Singh is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Willy Singh's NPI active?
- Yes — Willy Singh's NPI (1265587075) is active in the NPPES registry as of the last update on 2016-04-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.