Dr. Giles F. Whalen, MD
- Medicare services, 2024
- 39
- Medicare patients, 2024
- 56
- Part D claims, 2024
- 17
- MIPS score, 2024
- 100
- Industry payments
- $40
- Practice address
- 55 North Ave, Mendon, MA 01756
- Practice phone
- Call (508) 334-1000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Umass Memorial Medical Center
Mendon, Massachusetts
Find Dr. Whalen's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Giles F. Whalen is a general surgeon in Mendon, Massachusetts
Dr. Whalen practices at Umass Memorial Medical Center in Mendon, Massachusetts.
Dr. Whalen's NPI, 1538141957, was assigned on November 20, 2005. Dr. Whalen graduated from Duke University School of Medicine in 1980. Dr. Whalen holds Massachusetts license 57085.
- NPI
- 1538141957NPI Registry (opens in a new tab)
- NPI enumeration date
- November 20, 2005
- NPI status
- Active
- Practice phone
- (508) 334-1000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 72
- Medical school graduation
- 1980
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Giles F. Whalen practices at Umass Memorial Medical Center in Mendon, Massachusetts
Dr. Whalen's primary practice is Umass Memorial Medical Center, at 55 North Ave, Mendon, MA 01756 in Worcester County. The practice phone is (508) 334-1000.
- Umass Memorial Medical Center55 North Ave, Mendon, MA 01756 · Worcester CountyPhone(508) 334-1000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Giles F. Whalen is affiliated with 2 sites of care and 1 medical group
Dr. Whalen's primary practice is Umass Memorial Medical Center in Mendon, Massachusetts. The medical group on file is UMass Memorial Medical Group. Dmand AI also links Dr. Whalen to 1 more group practice or clinic, 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. Giles F. Whalen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Whalen practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Umass Memorial Medical Center | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Giles F. Whalen is one of 732 general surgeons in Massachusetts
Surgery is Dr. Whalen's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Whalen is licensed in Massachusetts.
Specialties and state licenses
- Surgery, MassachusettsPrimary
General surgeons near Dr. Whalen
Counts of general surgeons 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. Giles F. Whalen billed Medicare for 39 services in 2024
CMS data shows 39 Medicare services from Dr. Whalen across 3 procedure codes in 2024, all of them office visits, for 56 Medicare patients. Medicare paid $2,453 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Whalen's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1212024: 3968%
- Surgery
- 2023: 122024: 0100%
Dr. Whalen compared with the Massachusetts median for general surgeons, 2024
- Dr. Whalen
- Massachusetts median
- Medicare services
- 39vs 20081% below
- Medicare patients
- 56vs 15263% below
Medians across 688 general surgeons in Massachusetts with Dmand AI profiles that report each measure.
Dr. Whalen'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.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Giles F. Whalen treated 56 Medicare patients in 2024, average age 72
CMS counts 56 Medicare patients who saw Dr. Whalen in 2024. The largest group is 65 to 74, with 25 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 30% are also on Medicaid. Their average risk score is 1.79, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Whalen's median patient age at 77, with 20% women.
Dr. Whalen's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Whalen's Medicare patients by sex, 2024
- Women2748%
- Men2952%
Chronic conditions among Dr. Whalen's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Anxiety39%
- Diabetes39%
- Cancer34%
- Chronic kidney disease34%
- Arthritis32%
- Ischemic heart disease30%
Share of Medicare patients with each condition. A patient can have several.
Dr. Whalen's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 77
Patient panel by sex, all payers
- Women20%
- Men80%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Giles F. Whalen wrote 17 Medicare Part D claims in 2024
In 2024, Dr. Whalen wrote 17 Medicare Part D claims. 71% of them were for generic drugs.
Dr. Whalen's Part D claims by kind of drug, 2024
- Generic12 claims71%
- Brand-name and other5 claims29%
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Giles F. Whalen scored 100 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 100 out of 100 for Dr. Whalen for performance year 2024, reported through an alternative payment model (APM).
Dr. Whalen's MIPS scores, performance year 2024
- 100of 100Final score
- 83of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Source: Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Giles F. Whalen received $40 in industry payments in 2021
CMS Open Payments shows 1 general payment to Dr. Whalen from 1 drug or device company in 2021. Food and beverage make up the largest share, 100% of the total. Genentech, Inc. paid the most, $40.
Companies that paid Dr. Whalen the most, 2021 to 2021
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Giles F. Whalen graduated from Duke University School of Medicine
Dr. Whalen graduated from Duke University School of Medicine in 1980.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Giles F. Whalen'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 (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Clinician Public Reporting: Overall MIPS Performance (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. Giles F. Whalen
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. Giles F. Whalen's NPI number?
Dr. Giles F. Whalen's NPI number is 1538141957. It was assigned on November 20, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Giles F. Whalen?
Dr. Giles F. Whalen is a general surgeon in Mendon, Massachusetts. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. Giles F. Whalen practice?
Dr. Whalen practices at 55 North Ave, Mendon, MA 01756. Dr. Whalen's primary practice is Umass Memorial Medical Center in Mendon, Massachusetts. Dmand AI also links Dr. Whalen to 1 group practice or clinic.
What is Dr. Giles F. Whalen's office phone number?
The practice phone on file for Dr. Whalen is (508) 334-1000.
What is Dr. Giles F. Whalen's medical license number?
Dr. Whalen holds Massachusetts license 57085.
What medical group is Dr. Giles F. Whalen part of?
Dr. Whalen is linked to UMass Memorial Medical Group.
Does Dr. Giles F. Whalen accept Medicare?
Yes. CMS data shows Dr. Whalen billed Medicare for 39 services in 2024.
What is Dr. Giles F. Whalen's MIPS score?
Dr. Whalen's MIPS final score for performance year 2024 is 100 out of 100, reported through an alternative payment model (APM).
How many Medicare patients does Dr. Giles F. Whalen see?
CMS counts 56 Medicare patients who saw Dr. Whalen in 2024, with an average age of 72.
What services does Dr. Giles F. Whalen bill to Medicare?
In 2024, Dr. Whalen's most billed Medicare services were office visit, new patient (99203), office visit, new patient (99204) and office visit, established patient (99213).
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Where did Dr. Giles F. Whalen go to medical school?
Dr. Whalen graduated from Duke University School of Medicine in 1980.
Has Dr. Giles F. Whalen received payments from drug or device companies?
CMS Open Payments shows $40 in general payments to Dr. Whalen from 1 company from 2021 to 2021. The largest total came from Genentech, Inc.
How long has Dr. Giles F. Whalen been practicing?
Dr. Whalen graduated from medical school in 1980, 46 years ago.
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