Walter Klein, M.D.
NPI 1821099078 · Gastroenterology Physician · Harrington Park, NJ
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Walter Klein, M.D. is a Gastroenterology Physician provider in Harrington Park, NJ (NPI 1821099078).
Provider details
- NPI number
- 1821099078
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 25MA05761800 (NJ)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 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
1,691 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 393 | $145 |
| 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 | 366 | $18 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 136 | $107 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 116 | $206 |
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 100 | $154 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 65 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Pantoprazole Sodium | 337 | 119 |
| Sodium, Potassium,mag Sulfatesbrand: Sod Sulf-Potass Sulf-Mag Sulf | 221 | 218 |
| Atorvastatin Calcium | 176 | 54 |
| Rosuvastatin Calcium | 147 | 42 |
| Metformin Hcl | 128 | 43 |
| Amlodipine Besylate | 102 | 31 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$762 across 46 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
- 2005-08-09
- Last updated
- 2024-12-03
- Certified
- 2024-12-03
Frequently asked questions
- What is Walter Klein's NPI number?
- Walter Klein's National Provider Identifier (NPI) is 1821099078, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Walter Klein's specialty?
- Walter Klein is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Walter Klein located?
- Walter Klein's practice location on file with NPPES is 24 Elm St, Harrington Park, NJ 07640-1902.
- What is Walter Klein's phone number?
- The practice phone number listed in the NPPES registry for Walter Klein is (201) 784-0123.
- Does Walter Klein accept Medicare?
- Walter Klein is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Walter Klein's NPI active?
- Yes — Walter Klein's NPI (1821099078) is active in the NPPES registry as of the last update on 2024-12-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.