NPPES file of Aug 9, 2026

Nephrology Physician in Pennsylvania

651 NPPES records list nephrology physician with a practice address in Pennsylvania, 5 per 100,000 residents, the 6th highest rate of 51. Philadelphia and Pittsburgh have the most; each record links to the provider's NPI and the Pennsylvania license search. Page 14 of 14.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 207RN0300X · method

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Philadelphia has the most, 175

  1. Philadelphia175
  2. Pittsburgh71
  3. Allentown41
  4. Danville21
  5. Lancaster18

Nephrology Physician records in Pennsylvania

  1. Gregory Zollner, M.D.Langhorne, PA 190471023042355

Source: CMS NPPES, primary taxonomy 207RN0300X: records by practice city and the list of records, file of Aug 9, 2026.

Pennsylvania ranks 6 of 51 per resident

  1. Maryland5.5
  2. New York5.4
  3. Delaware5.0
  4. Pennsylvania5.0
  5. Louisiana4.8
  6. New Jersey4.7
  7. 50 states and D.C.4.0

Source: CMS NPPES, primary taxonomy 207RN0300X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

84.2% of these records appear in a Medicare file, against 85.8% nationally

A Medicare file here is Part D prescribing (2024), a MIPS score (2023), an Open Payments record (2024) or Medicare group billing (CMS Doctors and Clinicians). A record outside them may still see patients: these files cover Medicare only.

  1. Pennsylvania84.2%
  2. United States85.8%

Nephrology Physician records in Pennsylvania, measured

  • In a Medicare file548 of 651 · 84.2% here, 85.8% nationally
  • In the CMS Doctors and Clinicians file468 · 71.9% here, 76.0% nationally
  • Not updated in five years or more371 · 57.0% here, 54.9% nationally
  • Median graduation year2001 · the 468 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 207RN0300X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

651 NPPES records list nephrology physician (207RN0300X) as their primary taxonomy with a practice address in Pennsylvania: 5 per 100,000 residents against 4 nationally (50 states and D.C.). Philadelphia has 175 of them (27%).

A record is a registration a provider made and keeps up to date: it shows neither that the provider is licensed nor that they still practice there. The state's own license search is the check.

States with a similar number

  1. Illinois572
  2. Ohio499
  3. Florida840
  4. New Jersey433

States with a similar rate per 100,000

  1. Delaware5.0
  2. Louisiana4.8
  3. Puerto Rico4.7
  4. New York5.4

The largest states

  1. California1,468
  2. Texas1,159
  3. New York1,049
  4. Florida840
  5. Illinois572

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy; 2023 Census population estimates. A registry record is not a license.

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.