Dr. William Demarco, DO
- Medicare services, 2021
- 13
- Part D claims, 2024
- 12
- Hospital affiliations
- 3
- Industry payments
- $137
- Medical groups
- 2
- Practice address
- 725 North Street, Pittsfield, MA 01201
- Practice phone
- Call (413) 447-2000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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Dr. William Demarco is an internist in Pittsfield, Massachusetts
Dr. Demarco practices at Berkshire Medical Center in Pittsfield, Massachusetts, part of Berkshire Health Systems.
Dr. Demarco's NPI, 1124103577, was assigned on October 26, 2006. Dr. Demarco graduated from University of New England College of Osteopathic Medicine in 1984. Dr. Demarco holds Massachusetts license 59492.
- NPI
- 1124103577NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7315920097
- NPI enumeration date
- October 26, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (413) 447-2000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 68
- Medical school graduation
- 1984
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. William Demarco practices at Berkshire Medical Center in Pittsfield, Massachusetts
Dr. Demarco's primary practice is Berkshire Medical Center, at 725 North Street, Pittsfield, MA 01201 in Berkshire County. The practice phone is (413) 447-2000.
- Berkshire Medical Center725 North Street, Pittsfield, MA 01201 · Berkshire CountyPhone(413) 447-2000
Source: Dmand AI Affiliation Data
Dr. William Demarco is affiliated with 3 sites of care and 2 medical groups
Dr. Demarco's primary practice is Berkshire Medical Center in Pittsfield, Massachusetts, part of Berkshire Health Systems. Dr. Demarco is also affiliated with North Adams Regional Hospital. The medical group on file is Berkshire Medical Center. Dmand AI also links Dr. Demarco to 1 more hospital and 1 medical group, each named with a free account. Dr. Demarco's employer is on file too: a hospital.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. William Demarco's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Demarco practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Berkshire Medical Center | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Berkshire Health Systems and 6.2K+ hospitals, with verified contacts in the same login.
Dr. William Demarco is one of 5,528 internists in Massachusetts
Internal medicine is Dr. Demarco's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Demarco is licensed in Massachusetts.
Specialties and state licenses
- Internal medicine, MassachusettsPrimary
Internists near Dr. Demarco
Counts of internists 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. William Demarco billed Medicare for 13 services in 2021
CMS data shows 13 Medicare services from Dr. Demarco across 1 procedure code in 2021. Medicare paid $787 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Demarco's Medicare services by type, 2018 to 2021
- 2018
- 2021
- Office and hospital visits
- 2018: 482021: 1373%
Dr. Demarco compared with the Massachusetts median for internists, 2021
- Dr. Demarco
- Massachusetts median
- Medicare services
- 13vs 43197% below
- Part D claims
- 12vs 40297% below
Medians across 5,369 internists in Massachusetts with Dmand AI profiles that report each measure.
Dr. Demarco's most billed Medicare procedure codes, 2021
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. Demarco?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Demarco and other internists in Massachusetts.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. William Demarco's patients have a median age of 76
Across all payers, Dmand AI patient panel data puts Dr. Demarco's median patient age at 76, with 55% women.
Dr. Demarco's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 76
Patient panel by sex, all payers
- Women55%
- Men45%
Source: Dmand AI Patient Panel Data
Dr. William Demarco wrote 12 Medicare Part D claims in 2024
In 2024, Dr. Demarco wrote 12 Medicare Part D claims. 0% of them were for generic drugs. They cover 1 drug, with $2,501 in total drug cost. In 2023, CMS named 23 claims across 1 drug.
Dr. Demarco'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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 232024: 1248%
Drugs named by CMS: 1 in 2024, 1 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
How Dr. William Demarco takes part in Medicare
Dr. Demarco accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. William Demarco received $137 in industry payments in 2018
CMS Open Payments shows 2 general payments to Dr. Demarco from 2 drug and device companies in 2018. Food and beverage make up the largest share, 100% of the total. Indivior Inc. paid the most, $124.
Companies that paid Dr. Demarco the most, 2018 to 2018
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. William Demarco graduated from University of New England College of Osteopathic Medicine
Dr. Demarco graduated from University of New England College of Osteopathic Medicine in 1984.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. William Demarco'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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy 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 Data |
| 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) |
| 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. William Demarco
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. William Demarco's NPI number?
Dr. William Demarco's NPI number is 1124103577. It was assigned on October 26, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. William Demarco?
Dr. William Demarco is an internist in Pittsfield, Massachusetts. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. William Demarco practice?
Dr. Demarco practices at 725 North Street, Pittsfield, MA 01201. Dr. Demarco's primary practice is Berkshire Medical Center in Pittsfield, Massachusetts, part of Berkshire Health Systems. Dmand AI also links Dr. Demarco to 1 hospital and 1 medical group.
What is Dr. William Demarco's office phone number?
The practice phone on file for Dr. Demarco is (413) 447-2000.
What is Dr. William Demarco's medical license number?
Dr. Demarco holds Massachusetts license 59492.
Which hospitals is Dr. William Demarco affiliated with?
Dr. Demarco practices at Berkshire Medical Center in Pittsfield, Massachusetts. Dr. Demarco is also affiliated with North Adams Regional Hospital. Dmand AI links Dr. Demarco to 1 more hospital.
What medical group is Dr. William Demarco part of?
Dr. Demarco is linked to Berkshire Medical Center. Dmand AI links Dr. Demarco to 1 more medical group.
Does Dr. William Demarco accept Medicare?
Yes. CMS data shows Dr. Demarco billed Medicare for 13 services in 2021, and Dr. Demarco accepts Medicare assignment.
What services does Dr. William Demarco bill to Medicare?
In 2021, Dr. Demarco's most billed Medicare services were medical service (99217).
Where did Dr. William Demarco go to medical school?
Dr. Demarco graduated from University of New England College of Osteopathic Medicine in 1984.
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What drugs does Dr. William Demarco prescribe most?
In 2024 Medicare Part D data, Dr. Demarco's most prescribed drugs by claims were Shingrix.
Has Dr. William Demarco received payments from drug or device companies?
CMS Open Payments shows $137 in general payments to Dr. Demarco from 2 companies from 2018 to 2018. The largest total came from Indivior Inc.
How long has Dr. William Demarco been practicing?
Dr. Demarco graduated from medical school in 1984, 42 years ago.
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