Dr. Gail M. Herzig, MD
- Medicare services, 2024
- 467
- Medicare patients, 2024
- 331
- Part D claims, 2024
- 537
- Hospital affiliations
- 1
- Industry payments
- $3,364
- Practice address
- 45 Discovery Way, Acton, MA 01720
- Practice phone
- Call (978) 429-2010
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Middlesex Gastroenterology, P.C.
Acton, Massachusetts
Find Dr. Herzig's professional email, personal email and mobile number
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Dr. Gail M. Herzig is a gastroenterologist in Acton, Massachusetts
Dr. Herzig practices at Middlesex Gastroenterology, P.C. in Acton, Massachusetts.
Dr. Herzig's NPI, 1689608440, was assigned on July 10, 2006. Dr. Herzig graduated from Albany Medical College of Union University in 1988. Dr. Herzig holds Massachusetts license 80319.
- NPI
- 1689608440NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5092724492
- NPI enumeration date
- July 10, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (978) 429-2010
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 64
- Medical school graduation
- 1988
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gail M. Herzig practices at Middlesex Gastroenterology, P.C. in Acton, Massachusetts
Dr. Herzig's primary practice is Middlesex Gastroenterology, P.C., at 45 Discovery Way, Acton, MA 01720 in Middlesex County. The practice phone is (978) 429-2010.
- Middlesex Gastroenterology, P.C.45 Discovery Way, Acton, MA 01720 · Middlesex CountyPhone(978) 429-2010
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Gail M. Herzig is affiliated with 4 sites of care and 2 medical groups
Dr. Herzig's primary practice is Middlesex Gastroenterology, P.C. in Acton, Massachusetts. Dr. Herzig is also affiliated with Emerson Hospital. The medical group on file is Gastro Health, Acton. Dmand AI also links Dr. Herzig to 2 more group practices and clinics and 1 medical group, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Gail M. Herzig's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Herzig practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Middlesex Gastroenterology, P.C. | Available with a free account |
| +3 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gail M. Herzig is one of 597 gastroenterologists in Massachusetts
Gastroenterology is Dr. Herzig's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Herzig is licensed in Massachusetts.
Specialties and state licenses
- Gastroenterology, MassachusettsPrimary
Gastroenterologists near Dr. Herzig
Counts of gastroenterologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Gail M. Herzig billed Medicare for 467 services in 2024
CMS data shows 467 Medicare services from Dr. Herzig across 11 procedure codes in 2024, for 331 Medicare patients. Medicare paid $55,175 for them.
Dr. Herzig's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1482024: 26881%
- Surgery
- 2023: 1872024: 14025%
- Other services
- 2023: 412024: 5944%
- Tests and treatments
- 2023: 202024: 0100%
Where Dr. Herzig's Medicare services took place, 2024
- In an office15834%
- In a facility30966%
Dr. Herzig compared with the Massachusetts median for gastroenterologists, 2024
- Dr. Herzig
- Massachusetts median
- Medicare services
- 467vs 51910% below
- Medicare patients
- 331vs 343Close to median
- Part D claims
- 424vs 30041% above
Medians across 583 gastroenterologists in Massachusetts with Dmand AI profiles that report each measure.
Dr. Herzig's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Herzig?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Herzig and other gastroenterologists in Massachusetts.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gail M. Herzig treated 331 Medicare patients in 2024, average age 74
CMS counts 331 Medicare patients who saw Dr. Herzig in 2024. The largest group is 65 to 74, with 167 patients. 69% of them have high cholesterol, and 60% have high blood pressure. 5% are also on Medicaid. Their average risk score is 0.98, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Herzig's median patient age at 68, with 78% women.
Dr. Herzig's Medicare patients by age, 2024
Dr. Herzig's Medicare patients by sex, 2024
- Women25376%
- Men7824%
Chronic conditions among Dr. Herzig's Medicare patients, 2024
- High cholesterol69%
- High blood pressure60%
- Arthritis45%
- Anxiety31%
- Mood disorders27%
- Osteoporosis25%
- Depression24%
- Ischemic heart disease21%
Share of Medicare patients with each condition. A patient can have several.
Dr. Herzig's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 68
Patient panel by sex, all payers
- Women78%
- Men21%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Gail M. Herzig wrote 537 Medicare Part D claims in 2024
In 2024, Dr. Herzig wrote 537 Medicare Part D claims for 235 patients. 81% of them were for generic drugs. CMS names the drug for 424 of them, across 11 drugs with 11 or more claims each, at $139,383 in total drug cost. In 2023, CMS named 603 claims across 14 drugs.
Dr. Herzig's Part D claims by kind of drug, 2024
- Generic437 claims81%
- Brand-name100 claims19%
Dr. Herzig's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Herzig's Part D claims, 2024
- Antibiotics3%16 of 537 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 6032024: 42430%
Drugs named by CMS: 11 in 2024, 14 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Gail M. Herzig ranks in the 75th percentile for colonoscopy in Medicare
Dr. Herzig accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Herzig as offering telehealth. CMS counts 82 procedures of colonoscopy by Dr. Herzig, more than 75% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Where Dr. Herzig ranks in Medicare procedure volume
- Colonoscopy
- 75th percentile82 procedures
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 69th percentile68 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Gail M. Herzig received $3,364 in industry payments from 2016 to 2025
CMS Open Payments shows 144 general payments to Dr. Herzig from 18 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Abbvie Inc. paid the most, $1,384.
General payments to Dr. Herzig by program year, 2016 to 2025
Companies that paid Dr. Herzig the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Gail M. Herzig graduated from Albany Medical College of Union University
Dr. Herzig graduated from Albany Medical College of Union University in 1988.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Gail M. Herzig's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Gail M. Herzig
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Gail M. Herzig's NPI number?
Dr. Gail M. Herzig's NPI number is 1689608440. It was assigned on July 10, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Gail M. Herzig?
Dr. Gail M. Herzig is a gastroenterologist in Acton, Massachusetts. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. Gail M. Herzig practice?
Dr. Herzig practices at 45 Discovery Way, Acton, MA 01720. Dr. Herzig's primary practice is Middlesex Gastroenterology, P.C. in Acton, Massachusetts. Dmand AI also links Dr. Herzig to 2 group practices and clinics and 1 medical group.
What is Dr. Gail M. Herzig's office phone number?
The practice phone on file for Dr. Herzig is (978) 429-2010.
What is Dr. Gail M. Herzig's medical license number?
Dr. Herzig holds Massachusetts license 80319.
Which hospitals is Dr. Gail M. Herzig affiliated with?
Dr. Herzig is affiliated with Emerson Hospital.
What medical group is Dr. Gail M. Herzig part of?
Dr. Herzig is linked to Gastro Health, Acton. Dmand AI links Dr. Herzig to 1 more medical group.
Does Dr. Gail M. Herzig accept Medicare?
Yes. CMS data shows Dr. Herzig billed Medicare for 467 services in 2024, and Dr. Herzig accepts Medicare assignment.
Does Dr. Gail M. Herzig offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Herzig as offering telehealth services.
How many Medicare patients does Dr. Gail M. Herzig see?
CMS counts 331 Medicare patients who saw Dr. Herzig in 2024, with an average age of 74.
Show 5 more questionsShow fewer questions
What services does Dr. Gail M. Herzig bill to Medicare?
In 2024, Dr. Herzig's most billed Medicare services were office visit, established patient (99213), office visit, established patient (99214) and hospital inpatient care (99232).
Where did Dr. Gail M. Herzig go to medical school?
Dr. Herzig graduated from Albany Medical College of Union University in 1988.
What drugs does Dr. Gail M. Herzig prescribe most?
In 2024 Medicare Part D data, Dr. Herzig's most prescribed drugs by claims were Ondansetron HCl, Omeprazole and Sutab.
Has Dr. Gail M. Herzig received payments from drug or device companies?
CMS Open Payments shows $3,364 in general payments to Dr. Herzig from 18 companies from 2016 to 2025. The largest total came from Abbvie Inc.
How long has Dr. Gail M. Herzig been practicing?
Dr. Herzig graduated from medical school in 1988, 38 years ago.
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