NPPES file of Aug 9, 2026

Douglas E. Johnson, M.D.

Nephrology Physician · Allentown, PA

Douglas E. Johnson, M.D. is a nephrology physician with a practice address in Allentown, Pennsylvania, and NPI 1033100623, issued on Nov 2, 2005. Check the license (Pennsylvania MD023199E, as entered in NPPES) on the Pennsylvania Department of State (PALS); the federal record below is the public data PlainDoctor holds for this provider.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1033100623
Name
Douglas E. Johnson
Credential
M.D.
Primary taxonomy
Nephrology Physician 207RN0300X
License number
MD023199E PA
Self-reported in NPPES; status is on the state search
Practice location
1230 S Cedar Crest Blvd, Allentown, PA 18103
Phone
(610) 432-4529
Enumerated
Nov 2, 2005
Record last updated
Feb 20, 2008 (not updated in 18 years: call before relying on the address or phone)
Fax
(610) 432-2206
Medicaid ID
0687874 PA
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest nephrology physician records → All 651 in Pennsylvania → Look up another NPI →

Also registered at 1230 S Cedar Crest Blvd

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. John Altobelli, MDPlastic and Reconstructive Surgery Physician1396724100
  2. Jon Brndjar, D.O.Internal Medicine Physician1477523934
  3. Joseph CandioInternal Medicine Physician1104873967
  4. Raj Chowdary, M.D.Specialist1346276078
  5. Diane Deangelo, CRNPAdult Health Nurse Practitioner1760422703
  6. Lorraine Dillon, PASurgical Physician Assistant1376651794

Verify Douglas E. Johnson in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
    Search for license MD023199E    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Pennsylvania license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Douglas E. Johnson among 651 nephrology physician records in Pennsylvania

Douglas E. Johnson, M.D. is one of 651 nephrology physician records with a practice address in Pennsylvania. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2005, is newer than 0% of them.

  • NPI issued2005 · 0% of these records are older, 85% newer
  • In a Medicare fileNo · 84% of these records are
  • In the CMS Doctors and Clinicians fileNo · 72% of these records are
  • Record last updated2008 · 57% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RN0300X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Nephrology Physician providers in Pennsylvania

There are 651 nephrology physician records in Pennsylvania. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 651 in Pennsylvania → Every provider in Allentown → Nephrology Physician nationwide →

The 8 nephrology physician records with the nearest ZIP codes

  1. Tayyab Ali, MDAllentown, PA 181031710986559
  2. Ravindra Bollu, M.D.Allentown, PA 181031194716845
  3. Eric Fels, D.O.Allentown, PA 181031821089590
  4. Joseph Guzzo, M.D.Allentown, PA 181031154312833
  5. Drew Harrison, MDAllentown, PA 181031023094364
  6. Shawn Hazlett, DOAllentown, PA 181031316925209
  7. Nelson Kopyt, DOAllentown, PA 181031104802891
  8. Osun Kwon, MDAllentown, PA 181031528016243

Common questions

What is Douglas E. Johnson, M.D.'s NPI number?

Douglas E. Johnson, M.D.'s National Provider Identifier (NPI) is 1033100623, issued on Nov 2, 2005. An NPI identifies a provider in billing; it is not a license.

Where is Douglas E. Johnson, M.D. located?

The NPPES record lists a practice address at 1230 S Cedar Crest Blvd, Allentown, PA, 18103. Phone: (610) 432-4529. Providers update this record themselves, so call before visiting.

How can I verify Douglas E. Johnson, M.D.'s license?

NPPES lists Pennsylvania license number MD023199E, as entered by the provider. Search the Pennsylvania Department of State (PALS) at https://www.pals.pa.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.

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

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.