Erik Holzwanger, M.D.
NPI 1457747776 · Gastroenterology Physician · Boston, MA
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Erik Holzwanger, M.D. is a Gastroenterology Physician provider in Boston, MA (NPI 1457747776).
Provider details
- NPI number
- 1457747776
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 277398 (MA)
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
11 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
732 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 109 | $124 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 55 | $60 |
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 52 | $207 |
| Exam of Common Bile And/Or Pancreatic Duct Using a Flexible Endoscope43273 | 48 | $123 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 46 | $136 |
| Review By Radiologist of Image From Tube Placement Into Bile Duct Using an Endoscope |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 10 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-G | 86 | 69 |
| Omeprazole | 49 | 17 |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-C | 34 | 33 |
| Nortriptyline Hcl | 27 | — |
| Sucralfate | 22 | — |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Peg-3350 and Electrolytes | 21 | 20 |
| Ciprofloxacin Hcl | 15 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$20,708 across 28 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 (2)
- 736 Cambridge StBrighton, MA 02135Phone: (617) 562-5432
- 55 Lake Ave NWorcester, MA 01655-0002Phone: (508) 334-1000
Registry dates
- Enumerated
- 2015-04-14
- Last updated
- 2026-01-05
- Certified
- 2026-01-05
Frequently asked questions
- What is Erik Holzwanger's NPI number?
- Erik Holzwanger's National Provider Identifier (NPI) is 1457747776, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Erik Holzwanger's specialty?
- Erik Holzwanger is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Erik Holzwanger located?
- Erik Holzwanger's practice location on file with NPPES is 800 Washington St, Boston, MA 02111-1552.
- What is Erik Holzwanger's phone number?
- The practice phone number listed in the NPPES registry for Erik Holzwanger is (617) 636-5000.
- Does Erik Holzwanger accept Medicare?
- Erik Holzwanger is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Erik Holzwanger's NPI active?
- Yes — Erik Holzwanger's NPI (1457747776) is active in the NPPES registry as of the last update on 2026-01-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.