Ari Grinspan, M.D.
NPI 1144489105 · Gastroenterology Physician · New York, NY
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ari Grinspan, M.D. is a Gastroenterology Physician provider in New York, NY (NPI 1144489105).
Provider details
- NPI number
- 1144489105
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 261448 (NY)
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
18 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
648 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 High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 96 | $157 |
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 86 | $92 |
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 64 | $266 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 59 | $129 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 46 | $144 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 12 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Omeprazole | 130 | 37 |
| Pantoprazole Sodium | 78 | 21 |
| Famotidine | 39 | 12 |
| Linaclotidebrand: Linzess | 24 | — |
| Amitriptyline Hcl | 23 | — |
| Ondansetronbrand: Ondansetron Odt | 19 | — |
| Prucalopride Succinatebrand: Motegrity | 18 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$862 across 5 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
- 2008-06-05
- Last updated
- 2019-02-22
Frequently asked questions
- What is Ari Grinspan's NPI number?
- Ari Grinspan's National Provider Identifier (NPI) is 1144489105, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ari Grinspan's specialty?
- Ari Grinspan is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Ari Grinspan located?
- Ari Grinspan's practice location on file with NPPES is 17 E 102nd St, New York, NY 10029-5204.
- What is Ari Grinspan's phone number?
- The practice phone number listed in the NPPES registry for Ari Grinspan is (212) 241-8100.
- Does Ari Grinspan accept Medicare?
- Ari Grinspan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ari Grinspan's NPI active?
- Yes — Ari Grinspan's NPI (1144489105) is active in the NPPES registry as of the last update on 2019-02-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.