Dr. Michael D. Horwich, MD, PhD
- Medicare services, 2021
- 110
- Part D claims, 2021
- 128
- Publications
- 2
- Industry payments
- $2,894
- Affiliated sites
- 1
- Practice address
- 133 Littleton Rd, Westford, MA 01886
- Practice phone
- Call (978) 772-2424
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Apderm Nashoba
Westford, Massachusetts
Find Dr. Horwich'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. Michael D. Horwich is a dermatologist in Westford, Massachusetts
Dr. Horwich practices at Apderm Nashoba in Westford, Massachusetts.
Dr. Horwich's NPI, 1538470976, was assigned on June 30, 2010. Dr. Horwich graduated from University of Massachusetts Medical School in 2010. Dr. Horwich holds Massachusetts license 258156.
- NPI
- 1538470976NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7315163474
- NPI enumeration date
- June 30, 2010
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (978) 772-2424
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 42
- Medical school graduation
- 2010
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Michael D. Horwich practices at Apderm Nashoba in Westford, Massachusetts
Dr. Horwich's primary practice is Apderm Nashoba, at 133 Littleton Rd, Westford, MA 01886 in Middlesex County. The practice phone is (978) 772-2424.
- Apderm Nashoba133 Littleton Rd, Westford, MA 01886 · Middlesex CountyPhone(978) 772-2424
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Michael D. Horwich is affiliated with 2 sites of care and 2 medical groups
Dr. Horwich's primary practice is Apderm Nashoba in Westford, Massachusetts. The medical group on file is Pioneer Valley Dermatology. Dmand AI also links Dr. Horwich to 1 more group practice or clinic 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. Michael D. Horwich's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Horwich practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Apderm Nashoba | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Michael D. Horwich is one of 562 dermatologists in Massachusetts
Dermatology is Dr. Horwich's primary specialty in the NPI Registry, under taxonomy code 207N00000X. Dr. Horwich is licensed in Massachusetts.
Specialties and state licenses
- Dermatology, MassachusettsPrimary
Dermatologists near Dr. Horwich
Counts of dermatologists 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. Michael D. Horwich billed Medicare for 110 services in 2021
CMS data shows 110 Medicare services from Dr. Horwich across 5 procedure codes in 2021. Medicare paid $1,417 for them. Every service was in an office.
Dr. Horwich's Medicare services by type, 2020 to 2021
- 2020
- 2021
- Surgery
- 2020: 2,9862021: 7198%
- Office and hospital visits
- 2020: 1,3132021: 3997%
- Drugs given in the office
- 2020: 502021: 0100%
- Tests and treatments
- 2020: 822021: 0100%
- Other services
- 2020: 302021: 0100%
Dr. Horwich compared with the Massachusetts median for dermatologists, 2021
- Dr. Horwich
- Massachusetts median
- Medicare services
- 110vs 1,61093% below
- Part D claims
- 128vs 34763% below
Medians across 559 dermatologists in Massachusetts with Dmand AI profiles that report each measure.
Dr. Horwich'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. Horwich?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Horwich and other dermatologists in Massachusetts.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Michael D. Horwich's patients have a median age of 57
Across all payers, Dmand AI patient panel data puts Dr. Horwich's median patient age at 57, with 50% women.
Dr. Horwich's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 57
Patient panel by sex, all payers
- Women50%
- Men50%
Source: Dmand AI Patient Panel Data
Dr. Michael D. Horwich wrote 128 Medicare Part D claims in 2021
In 2021, Dr. Horwich wrote 128 Medicare Part D claims. They cover 7 drugs, with $4,851 in total drug cost. In 2020, CMS named 916 claims across 20 drugs.
Dr. Horwich's most prescribed drugs by claims, 2021
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, 2020 to 2021
- 2020
- 2021
- Claims for drugs CMS names
- 2020: 9162021: 12886%
Drugs named by CMS: 7 in 2021, 20 in 2020.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
Dr. Michael D. Horwich ranks in the 91st percentile for melanoma (skin cancer) excision in Medicare
Dr. Horwich accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 84 procedures of melanoma (skin cancer) excision by Dr. Horwich, more than 91% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Horwich ranks in Medicare procedure volume
- Removal of skin lesions
- 86th percentile503 procedures
- Skin biopsy
- 90th percentile292 procedures
- Melanoma (skin cancer) excision
- 91st percentile84 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Removal or shaving of skin growth: 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. Michael D. Horwich has 2 publications on record
Dmand AI links 2 papers to Dr. Horwich, published from 2016 to 2017. Dr. Horwich's most frequent co-authors are Justin J. Finch, MD, Omar A. Ibrahimi, MD, PhD and Arni Kjalar Kristjansson, MD.
Dr. Horwich's most frequent co-authors
- Justin J. Finch, MD1 shared paper
- Omar A. Ibrahimi, MD, PhD1 shared paper
- Arni Kjalar Kristjansson, MD1 shared paper
Recent publications by Dr. Horwich
See who Dr. Horwich researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Horwich works with, so you can find a warm path to the right dermatologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Michael D. Horwich received $2,894 in industry payments from 2016 to 2020
CMS Open Payments shows 168 general payments to Dr. Horwich from 13 drug and device companies from 2016 to 2020. Food and beverage make up the largest share, 93% of the total. Janssen Pharmaceuticals, Inc paid the most, $552.
General payments to Dr. Horwich by program year, 2016 to 2020
General payments to Dr. Horwich by kind, 2016 to 2020
- Food and beverage$2,69393%
- Education$2017%
Companies that paid Dr. Horwich the most, 2016 to 2020
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Michael D. Horwich graduated from University of Massachusetts Medical School
Dr. Horwich graduated from University of Massachusetts Medical School in 2010.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Michael D. Horwich'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 Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| 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. Michael D. Horwich
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. Michael D. Horwich's NPI number?
Dr. Michael D. Horwich's NPI number is 1538470976. It was assigned on June 30, 2010, and it is active in the NPI Registry.
What kind of doctor is Dr. Michael D. Horwich?
Dr. Michael D. Horwich is a dermatologist in Westford, Massachusetts. The primary specialty in the NPI Registry is Dermatology Physician (taxonomy code 207N00000X).
Where does Dr. Michael D. Horwich practice?
Dr. Horwich practices at 133 Littleton Rd, Westford, MA 01886. Dr. Horwich's primary practice is Apderm Nashoba in Westford, Massachusetts. Dmand AI also links Dr. Horwich to 1 group practice or clinic and 1 medical group.
What is Dr. Michael D. Horwich's office phone number?
The practice phone on file for Dr. Horwich is (978) 772-2424.
What is Dr. Michael D. Horwich's medical license number?
Dr. Horwich holds Massachusetts license 258156.
What medical group is Dr. Michael D. Horwich part of?
Dr. Horwich is linked to Pioneer Valley Dermatology. Dmand AI links Dr. Horwich to 1 more medical group.
Does Dr. Michael D. Horwich accept Medicare?
Yes. CMS data shows Dr. Horwich billed Medicare for 110 services in 2021, and Dr. Horwich accepts Medicare assignment.
What services does Dr. Michael D. Horwich bill to Medicare?
In 2021, Dr. Horwich's most billed Medicare services were surgery: skin and soft tissue (17003), office visit, established patient (99213) and surgery: skin and soft tissue (17000).
Where did Dr. Michael D. Horwich go to medical school?
Dr. Horwich graduated from University of Massachusetts Medical School in 2010.
What drugs does Dr. Michael D. Horwich prescribe most?
In 2021 Medicare Part D data, Dr. Horwich's most prescribed drugs by claims were Ketoconazole, Betamethasone Diprop Augmented and Clobetasol Propionate.
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Has Dr. Michael D. Horwich received payments from drug or device companies?
CMS Open Payments shows $2,894 in general payments to Dr. Horwich from 13 companies from 2016 to 2020. The largest total came from Janssen Pharmaceuticals, Inc.
How long has Dr. Michael D. Horwich been practicing?
Dr. Horwich graduated from medical school in 2010, 16 years ago.
Does Dr. Michael D. Horwich do research?
Dmand AI links 2 publications to Dr. Horwich, published from 2016 to 2017.
Who does Dr. Michael D. Horwich publish with?
Dr. Horwich's most frequent co-authors are Justin J. Finch, MD (1 shared paper), Omar A. Ibrahimi, MD, PhD (1 shared paper) and Arni Kjalar Kristjansson, MD (1 shared paper).
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