Gail Herzig, MD
NPI 1689608440 · Gastroenterology Physician · Acton, MA
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gail Herzig, MD is a Gastroenterology Physician provider in Acton, MA (NPI 1689608440).
Provider details
- NPI number
- 1689608440
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 80319 (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
19 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
467 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 | 80 | $98 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 60 | $139 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 60 | $82 |
| Colorectal Cancer Screening; Colonoscopy on Individual at High RiskG0105 | 59 | $181 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 53 | $141 |
| Biopsy of Large Bowel Using a Flexible Endoscope |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 11 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Ondansetron Hcl | 110 | 106 |
| Omeprazole | 96 | 38 |
| Sod Sulf/Pot Chloride/Mag Sulfbrand: Sutab | 46 | 45 |
| Pantoprazole Sodium | 43 | 14 |
| Lansoprazole | 28 | — |
| Famotidine | 27 | 12 |
| Mesalamine | 22 | — |
| Budesonide |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$961 across 32 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
- 2006-07-10
- Last updated
- 2010-11-18
Frequently asked questions
- What is Gail Herzig's NPI number?
- Gail Herzig's National Provider Identifier (NPI) is 1689608440, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gail Herzig's specialty?
- Gail Herzig is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Gail Herzig located?
- Gail Herzig's practice location on file with NPPES is 45b Discovery Way, Acton, MA 01720-4482.
- What is Gail Herzig's phone number?
- The practice phone number listed in the NPPES registry for Gail Herzig is (978) 429-2010.
- Does Gail Herzig accept Medicare?
- Gail Herzig is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gail Herzig's NPI active?
- Yes — Gail Herzig's NPI (1689608440) is active in the NPPES registry as of the last update on 2010-11-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.