Justin Horwitz, D.O.
NPI 1528201670 · Gastroenterology Physician · Chandler, AZ
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Justin Horwitz, D.O. is a Gastroenterology Physician provider in Chandler, AZ (NPI 1528201670).
Provider details
- NPI number
- 1528201670
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 02005343A (IN)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
17 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
346 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) |
|---|---|---|
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 88 | $118 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 87 | $95 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 60 | $125 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 43 | $89 |
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 35 | $228 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 16 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Famotidine | 160 | 60 |
| Pantoprazole Sodium | 154 | 78 |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-G | 83 | 79 |
| Omeprazole | 80 | 40 |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Peg-3350 and Electrolytes | 41 | 39 |
| Linaclotidebrand: Linzess | 38 | 19 |
| Diphenoxylate Hcl/Atropinebrand: Diphenoxylate-Atropine |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$143 across 1 record (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
- 2009-04-18
- Last updated
- 2021-11-13
- Certified
- 2020-09-24
Frequently asked questions
- What is Justin Horwitz's NPI number?
- Justin Horwitz's National Provider Identifier (NPI) is 1528201670, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Justin Horwitz's specialty?
- Justin Horwitz is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Justin Horwitz located?
- Justin Horwitz's practice location on file with NPPES is 1125 S Alma School Rd Ste 210, Chandler, AZ 85286-2811.
- What is Justin Horwitz's phone number?
- The practice phone number listed in the NPPES registry for Justin Horwitz is (480) 256-4900.
- Does Justin Horwitz accept Medicare?
- Justin Horwitz is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Justin Horwitz's NPI active?
- Yes — Justin Horwitz's NPI (1528201670) is active in the NPPES registry as of the last update on 2021-11-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.