Charles Lynch, MD
NPI 1972684348 · Nephrology Physician · San Francisco, CA
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Charles Lynch, MD is a Nephrology Physician provider in San Francisco, CA (NPI 1972684348).
Provider details
- NPI number
- 1972684348
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- A43429 (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
1,645 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 | 678 | $139 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 294 | $162 |
| Critical Care, First 30-74 Minutes99291 | 187 | $245 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 184 | $204 |
| Dialysis Services, 4 Or More Physician Visits Per Month (20 Years Or Older)90960 | 158 | $426 |
| Manual Urinalysis Test With Examination Using Microscope, Non-Automated81000 | 43 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 45 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 126 | 37 |
| Losartan Potassium | 117 | 43 |
| Metformin Hcl | 61 | 18 |
| Atorvastatin Calcium | 61 | 21 |
| Lisinopril | 56 | 21 |
| Furosemide | 53 | 23 |
| Febuxostat | 52 | 14 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$32 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
- 2006-10-18
- Last updated
- 2022-07-29
- Certified
- 2022-07-29
Frequently asked questions
- What is Charles Lynch's NPI number?
- Charles Lynch's National Provider Identifier (NPI) is 1972684348, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Charles Lynch's specialty?
- Charles Lynch is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Charles Lynch located?
- Charles Lynch's practice location on file with NPPES is 2100 Webster St, San Francisco, CA 94115-2375.
- What is Charles Lynch's phone number?
- The practice phone number listed in the NPPES registry for Charles Lynch is (415) 923-3456.
- Does Charles Lynch accept Medicare?
- Charles Lynch is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Charles Lynch's NPI active?
- Yes — Charles Lynch's NPI (1972684348) is active in the NPPES registry as of the last update on 2022-07-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.