Madhu Sudan, MD
NPI 1679674923 · Nephrology Physician · Covina, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Madhu Sudan, MD is a Nephrology Physician provider in Covina, CA (NPI 1679674923).
Provider details
- NPI number
- 1679674923
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A-31769 (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
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
246 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 High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 224 | $188 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 22 | $16 |
Typical Medicare-allowed amounts for these services range $16–$188 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Losartan Potassium | 51 | 12 |
| Atorvastatin Calcium | 24 | — |
| Levothyroxine Sodium | 15 | — |
| Terazosin Hcl | 15 | — |
| Calcitriol | 13 | — |
| Sevelamer Carbonate | 13 | — |
| Atenolol | 12 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$24 across 1 record (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
- 2006-09-26
- Last updated
- 2020-09-28
- Certified
- 2020-09-28
Frequently asked questions
- What is Madhu Sudan's NPI number?
- Madhu Sudan's National Provider Identifier (NPI) is 1679674923, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Madhu Sudan's specialty?
- Madhu Sudan is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Madhu Sudan located?
- Madhu Sudan's practice location on file with NPPES is 500 W Badillo St, Covina, CA 91722-3762.
- What is Madhu Sudan's phone number?
- The practice phone number listed in the NPPES registry for Madhu Sudan is (626) 915-6683.
- Does Madhu Sudan accept Medicare?
- Madhu Sudan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Madhu Sudan's NPI active?
- Yes — Madhu Sudan's NPI (1679674923) is active in the NPPES registry as of the last update on 2020-09-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.