Aaron Bellows, M.D.
NPI 1689964546 · Gastroenterology Physician · Princeton, NJ
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Aaron Bellows, M.D. is a Gastroenterology Physician provider in Princeton, NJ (NPI 1689964546).
Provider details
- NPI number
- 1689964546
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 25MA09442200 (NJ)
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
15 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
686 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 | 228 | $135 |
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 94 | $136 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 82 | $128 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 72 | $174 |
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 49 | $262 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 21 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Pantoprazole Sodium | 284 | 85 |
| Omeprazole | 169 | 56 |
| Famotidine | 156 | 47 |
| Sod Sulf/Pot Chloride/Mag Sulfbrand: Sutab | 80 | 79 |
| Colesevelam Hcl | 39 | 15 |
| Esomeprazole Magnesium | 38 | 13 |
| Lansoprazole | 34 | 12 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,322 across 77 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
- 2011-04-13
- Last updated
- 2014-09-23
Frequently asked questions
- What is Aaron Bellows's NPI number?
- Aaron Bellows's National Provider Identifier (NPI) is 1689964546, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Aaron Bellows's specialty?
- Aaron Bellows is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Aaron Bellows located?
- Aaron Bellows's practice location on file with NPPES is 731 Alexander Rd, Princeton, NJ 08540-6345.
- What is Aaron Bellows's phone number?
- The practice phone number listed in the NPPES registry for Aaron Bellows is (609) 924-1422.
- Does Aaron Bellows accept Medicare?
- Aaron Bellows is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Aaron Bellows's NPI active?
- Yes — Aaron Bellows's NPI (1689964546) is active in the NPPES registry as of the last update on 2014-09-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.