Harold Loewenstine, M.D.
NPI 1184628679 · Gastroenterology Physician · Montgomery, OH
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Harold Loewenstine, M.D. is a Gastroenterology Physician provider in Montgomery, OH (NPI 1184628679).
Provider details
- NPI number
- 1184628679
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 35-057583 (OH)
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
21 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
989 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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 220 | $85 |
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 169 | $128 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 114 | $118 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 97 | $81 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 93 | $105 |
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 29 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Pantoprazole Sodium | 583 | 158 |
| Sodium Chloride/Nahco3/Kcl/Pegbrand: Peg 3350-Electrolyte | 333 | 322 |
| Ondansetron Hcl | 225 | 218 |
| Omeprazole | 139 | 38 |
| Sodium, Potassium,mag Sulfatesbrand: Sod Sulf-Potass Sulf-Mag Sulf | 135 | 134 |
| Famotidine | 102 | 37 |
| Dicyclomine Hcl | 71 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$357 across 19 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
Additional practice locations (1)
- 4746 Montgomery RdSuite 202Cincinnati, OH 45212-2622Phone: (513) 721-5300Fax: (513) 721-5166
Registry dates
- Enumerated
- 2005-06-13
- Last updated
- 2023-08-31
- Certified
- 2023-08-31
Frequently asked questions
- What is Harold Loewenstine's NPI number?
- Harold Loewenstine's National Provider Identifier (NPI) is 1184628679, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Harold Loewenstine's specialty?
- Harold Loewenstine is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Harold Loewenstine located?
- Harold Loewenstine's practice location on file with NPPES is 10600 Montgomery Rd Ste 300, Montgomery, OH 45242-4464.
- What is Harold Loewenstine's phone number?
- The practice phone number listed in the NPPES registry for Harold Loewenstine is (513) 853-9250.
- Does Harold Loewenstine accept Medicare?
- Harold Loewenstine is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Harold Loewenstine's NPI active?
- Yes — Harold Loewenstine's NPI (1184628679) is active in the NPPES registry as of the last update on 2023-08-31.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.