Dr. Holly K. Michaelson, MD
- Medicare services, 2024
- 554
- Medicare patients, 2024
- 389
- Part D claims, 2024
- 215
- Hospital affiliations
- 1
- Industry payments
- $101
- Practice address
- 22 Atwood Dr, Northampton, MA 01060
- Practice phone
- Call (413) 582-2898
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Mass General Brigham Medical Group Western Massachusetts Inc
Northampton, Massachusetts
Find Dr. Michaelson's professional email, personal email and mobile number
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Dr. Holly K. Michaelson is a general surgeon in Northampton, Massachusetts
Dr. Michaelson practices at Mass General Brigham Medical Group Western Massachusetts Inc in Northampton, Massachusetts.
Dr. Michaelson's NPI, 1477513679, was assigned on March 23, 2006. Dr. Michaelson graduated from Temple University School of Medicine in 1997. Dr. Michaelson holds Massachusetts license 221242.
- NPI
- 1477513679NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2365414521
- NPI enumeration date
- March 23, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (413) 582-2898
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 55
- Medical school graduation
- 1997
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Holly K. Michaelson practices at Mass General Brigham Medical Group Western Massachusetts Inc in Northampton, Massachusetts
Dr. Michaelson's primary practice is Mass General Brigham Medical Group Western Massachusetts Inc, at 22 Atwood Dr, Northampton, MA 01060 in Hampshire County. The practice phone is (413) 582-2898.
- Mass General Brigham Medical Group Western Massachusetts Inc22 Atwood Dr, Northampton, MA 01060 · Hampshire CountyPhone(413) 582-2898
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Holly K. Michaelson is affiliated with 4 sites of care and 1 medical group
Dr. Michaelson's primary practice is Mass General Brigham Medical Group Western Massachusetts Inc in Northampton, Massachusetts. Dr. Michaelson is also affiliated with Cooley Dickinson Hospital. The medical group on file is Mass General Brigham Medical Group Western Massachusetts. Dmand AI also links Dr. Michaelson to 1 more group practice or clinic and 1 home health agency, 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. Holly K. Michaelson's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Michaelson practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Mass General Brigham Medical Group Western Massachusetts Inc | Available with a free account |
| +3 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Holly K. Michaelson is one of 732 general surgeons in Massachusetts
Surgery is Dr. Michaelson's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Michaelson is licensed in Massachusetts.
Specialties and state licenses
- Surgery, MassachusettsPrimary
General surgeons near Dr. Michaelson
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. Holly K. Michaelson billed Medicare for 554 services in 2024
CMS data shows 554 Medicare services from Dr. Michaelson across 14 procedure codes in 2024, for 389 Medicare patients. Medicare paid $69,785 for them.
Dr. Michaelson's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 3872024: 44816%
- Surgery
- 2023: 642024: 10666%
- Imaging
- 2023: 112024: 0100%
Where Dr. Michaelson's Medicare services took place, 2024
- In an office24144%
- In a facility31356%
Dr. Michaelson compared with the Massachusetts median for general surgeons, 2024
- Dr. Michaelson
- Massachusetts median
- Medicare services
- 554vs 2002.8 times
- Medicare patients
- 389vs 1522.6 times
- Part D claims
- 177vs 228.0 times
Medians across 688 general surgeons in Massachusetts with Dmand AI profiles that report each measure.
Dr. Michaelson'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. Holly K. Michaelson treated 389 Medicare patients in 2024, average age 74
CMS counts 389 Medicare patients who saw Dr. Michaelson in 2024. The largest group is 65 to 74, with 180 patients. 65% of them have high blood pressure, and 57% have high cholesterol. 19% are also on Medicaid. Their average risk score is 1.15, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Michaelson's median patient age at 73, with 66% women.
Dr. Michaelson's Medicare patients by age, 2024
Dr. Michaelson's Medicare patients by sex, 2024
- Women24763%
- Men14237%
Chronic conditions among Dr. Michaelson's Medicare patients, 2024
- High blood pressure65%
- High cholesterol57%
- Arthritis41%
- Cancer40%
- Mood disorders27%
- Anxiety26%
- Depression21%
- Chronic kidney disease20%
Share of Medicare patients with each condition. A patient can have several.
Dr. Michaelson's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 73
Patient panel by sex, all payers
- Women66%
- Men33%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Holly K. Michaelson wrote 215 Medicare Part D claims in 2024
In 2024, Dr. Michaelson wrote 215 Medicare Part D claims for 149 patients. 99% of them were for generic drugs. CMS names the drug for 177 of them, across 4 drugs with 11 or more claims each, at $831 in total drug cost. In 2023, CMS named 117 claims across 3 drugs.
Dr. Michaelson's Part D claims by kind of drug, 2024
- Generic212 claims99%
- Brand-name and other3 claims1%
Dr. Michaelson'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. Michaelson's Part D claims, 2024
- Opioids65%139 of 215 claims
- Antibiotics18%38 of 215 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: 1172024: 17751%
Drugs named by CMS: 4 in 2024, 3 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. Holly K. Michaelson ranks in the 99th percentile for hernia repair - groin (open) in Medicare
Dr. Michaelson accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Michaelson as offering telehealth. CMS counts 39 procedures of hernia repair - groin (open) by Dr. Michaelson, more than 99% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Where Dr. Michaelson ranks in Medicare procedure volume
- Hernia repair - groin (open)
- 99th percentile39 procedures
- Removal of tissue
- 72nd percentile27 procedures
- Mastectomy
- 77th percentile19 procedures
- Colonoscopy
- 42nd percentile12 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Melanoma (skin cancer) excision: 1 to 10 procedures (CMS shows small counts as a range)
Removal of skin lesions: 1 to 10 procedures (CMS shows small counts as a range)
Skin biopsy: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Holly K. Michaelson received $101 in industry payments from 2018 to 2024
CMS Open Payments shows 5 general payments to Dr. Michaelson from 5 drug and device companies from 2018 to 2024. Food and beverage make up the largest share, 100% of the total. Ethicon Inc. paid the most, $21.
General payments to Dr. Michaelson by program year, 2018 to 2024
Companies that paid Dr. Michaelson the most, 2018 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Holly K. Michaelson graduated from Temple University School of Medicine
Dr. Michaelson graduated from Temple University School of Medicine in 1997.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Holly K. Michaelson'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. Holly K. Michaelson
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. Holly K. Michaelson's NPI number?
Dr. Holly K. Michaelson's NPI number is 1477513679. It was assigned on March 23, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Holly K. Michaelson?
Dr. Holly K. Michaelson is a general surgeon in Northampton, Massachusetts. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. Holly K. Michaelson practice?
Dr. Michaelson practices at 22 Atwood Dr, Northampton, MA 01060. Dr. Michaelson's primary practice is Mass General Brigham Medical Group Western Massachusetts Inc in Northampton, Massachusetts. Dmand AI also links Dr. Michaelson to 1 group practice or clinic and 1 home health agency.
What is Dr. Holly K. Michaelson's office phone number?
The practice phone on file for Dr. Michaelson is (413) 582-2898.
What is Dr. Holly K. Michaelson's medical license number?
Dr. Michaelson holds Massachusetts license 221242.
Which hospitals is Dr. Holly K. Michaelson affiliated with?
Dr. Michaelson is affiliated with Cooley Dickinson Hospital.
What medical group is Dr. Holly K. Michaelson part of?
Dr. Michaelson is linked to Mass General Brigham Medical Group Western Massachusetts.
Does Dr. Holly K. Michaelson accept Medicare?
Yes. CMS data shows Dr. Michaelson billed Medicare for 554 services in 2024, and Dr. Michaelson accepts Medicare assignment.
Does Dr. Holly K. Michaelson offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Michaelson as offering telehealth services.
How many Medicare patients does Dr. Holly K. Michaelson see?
CMS counts 389 Medicare patients who saw Dr. Michaelson in 2024, with an average age of 74.
Show 5 more questionsShow fewer questions
What services does Dr. Holly K. Michaelson bill to Medicare?
In 2024, Dr. Michaelson's most billed Medicare services were office visit, new patient (99204), office visit, established patient (99214) and office visit, established patient (99213).
Where did Dr. Holly K. Michaelson go to medical school?
Dr. Michaelson graduated from Temple University School of Medicine in 1997.
What drugs does Dr. Holly K. Michaelson prescribe most?
In 2024 Medicare Part D data, Dr. Michaelson's most prescribed drugs by claims were Oxycodone HCl, Erythromycin and Gavilyte-G.
Has Dr. Holly K. Michaelson received payments from drug or device companies?
CMS Open Payments shows $101 in general payments to Dr. Michaelson from 5 companies from 2018 to 2024. The largest total came from Ethicon Inc.
How long has Dr. Holly K. Michaelson been practicing?
Dr. Michaelson graduated from medical school in 1997, 29 years ago.
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