NPPES file of Aug 9, 2026

Walter Klein, M.D.

Gastroenterology Physician · Harrington Park, NJ

Walter Klein, M.D. is a gastroenterology physician with a practice address in Harrington Park, New Jersey, and NPI 1821099078, issued on Aug 9, 2005. Check the license (New Jersey 25MA05761800, as entered in NPPES) on the New Jersey State Board of Medical Examiners; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1821099078
Name
Walter Klein
Credential
M.D.
Primary taxonomy
Gastroenterology Physician 207RG0100X
License number
25MA05761800 NJ
Self-reported in NPPES; status is on the state search
Practice location
24 Elm St, Harrington Park, NJ 07640
Phone
(201) 784-0123
Enumerated
Aug 9, 2005
Record last updated
Dec 3, 2024
Fax
(201) 784-0065
Medicaid ID
5200709 NJ
Medicare enrollment
Enrolled (PECOS I20040406000192); accepts Medicare assignment
Medical or professional school
Js Weill Medical College, Cornell University, 1987
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest gastroenterology physician records → All 735 in New Jersey → Look up another NPI →

Also registered at 24 Elm St

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

  1. Joanna Blanco, M.D.Internal Medicine Physician1588018816
  2. Donna BrunnquellNurse Practitioner1962667071
  3. Stephen Brunnquell, M.D.Internal Medicine Physician1740281310
  4. Hwa Choi, N.P.Adult Health Nurse Practitioner1083817225
  5. Seulkih D'Andrea, MDFamily Medicine Physician1023437092
  6. Tina FadilInternal Medicine Physician1932101516

Verify Walter Klein in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersNew Jersey State Board of Medical Examiners
    Search for license 25MA05761800    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 New Jersey license search

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3.8 times the Medicare Part D claims of the average gastroenterology physician in 2024

3,117 Medicare Part D claims for 577 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 15 claims were for opioids.

  1. Walter Klein3,117
  2. Specialty average811

Most prescribed

  1. Pantoprazole Sodium337 claims
  2. Sod Sulf-Potass Sulf-Mag Sulf221 claims
  3. Atorvastatin Calcium176 claims
  4. Rosuvastatin Calcium147 claims
  5. Metformin Hcl128 claims
  6. Amlodipine Besylate102 claims

Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.

Industry payments in 2024: $762.21

46 payments; by number, the most common kind was food and beverage; the largest payer was Pfizer Inc. The 13,350 providers of this specialty with any payment received $5,015.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Walter Klein$762.21
  2. Specialty average$5,015.95

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Bills Medicare through one group practice

  1. Medical Associates OF Englewood PCHarrington Park, NJ

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Walter Klein among 735 gastroenterology physician records in New Jersey

Walter Klein, M.D. is one of 735 gastroenterology physician records with a practice address in New Jersey. 89% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.

  • NPI issued2005 · 0% of these records are older, 88% newer
  • In a Medicare fileYes · 89% of these records are
  • In the CMS Doctors and Clinicians fileYes · 77% of these records are
  • Graduated1987 · median 2000 among the 564 with a school on file
  • Record last updated2024 · 54% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a New Jersey practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

2 gastroenterology physician records list a practice address in Harrington Park

They are 2 of the 57 NPPES records with a practice address in Harrington Park, and 735 gastroenterology physician records in New Jersey.

All 735 in New Jersey → Every provider in Harrington Park → Gastroenterology Physician nationwide →

The 8 gastroenterology physician records with the nearest ZIP codes

  1. Neera Sinha, M.D.Harrington Park, NJ 076401750745766
  2. David Stewart, M.D.Hillsdale, NJ 076421417916131
  3. Melanie Jordan Burgos, MDEnglewood Cliffs, NJ 076321538695531
  4. Richard Chessler, M.D.Englewood Cliffs, NJ 076321881632404
  5. Marc Fiorillo, M.D.Englewood Cliffs, NJ 076321477712636
  6. Simon Kahn, M.D.Englewood Cliffs, NJ 076321386679694
  7. Michael Meininger, M.D.Englewood Cliffs, NJ 076321174567010
  8. Bruce Rosen, DOEnglewood Cliffs, NJ 076321922158591

Common questions

What is Walter Klein, M.D.'s NPI number?

Walter Klein, M.D.'s National Provider Identifier (NPI) is 1821099078, issued on Aug 9, 2005. An NPI identifies a provider in billing; it is not a license.

Where is Walter Klein, M.D. located?

The NPPES record lists a practice address at 24 Elm St, Harrington Park, NJ, 07640. Phone: (201) 784-0123. Providers update this record themselves, so call before visiting.

How can I verify Walter Klein, M.D.'s license?

NPPES lists New Jersey license number 25MA05761800, as entered by the provider. Search the New Jersey State Board of Medical Examiners at https://newjersey.mylicense.com/verification/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does Walter Klein, M.D. prescribe under Medicare Part D?

In 2024, Walter Klein, M.D. had 3,117 Medicare Part D claims for 577 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. 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.