Sithu Lin, M.D.
NPI 1023417649 · Nephrology Physician · Fountain Valley, CA
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sithu Lin, M.D. is a Nephrology Physician provider in Fountain Valley, CA (NPI 1023417649).
Provider details
- NPI number
- 1023417649
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A-143411 (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
11 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
83 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 50 Minutes99233 | 55 | $121 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 17 | $176 |
| 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 | 11 | $17 |
Typical Medicare-allowed amounts for these services range $17–$176 (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 · 18 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Furosemide | 113 | 47 |
| Amlodipine Besylate | 78 | 31 |
| Calcitriol | 63 | 33 |
| Losartan Potassium | 52 | 23 |
| Allopurinol | 47 | 29 |
| Bumetanide | 30 | 12 |
| Empagliflozinbrand: Jardiance | 24 | 17 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$627 across 13 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
- 2014-08-19
- Last updated
- 2023-07-11
- Certified
- 2023-07-11
Frequently asked questions
- What is Sithu Lin's NPI number?
- Sithu Lin's National Provider Identifier (NPI) is 1023417649, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sithu Lin's specialty?
- Sithu Lin is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Sithu Lin located?
- Sithu Lin's practice location on file with NPPES is 11100 Warner Ave Ste 218, Fountain Valley, CA 92708-7511.
- What is Sithu Lin's phone number?
- The practice phone number listed in the NPPES registry for Sithu Lin is (714) 641-9696.
- Does Sithu Lin accept Medicare?
- Sithu Lin is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Sithu Lin's NPI active?
- Yes — Sithu Lin's NPI (1023417649) is active in the NPPES registry as of the last update on 2023-07-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.