Mack Su
Dermatology • Boston, MA
75 Francis St
Boston, MA 021156110
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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NPI assigned on April 12, 2021; this date does not establish years in practice.
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Published CMS data list 121 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Ketoconazole — 51 prescription fills, including refills.
- Triamcinolone Acetonide — 29 prescription fills, including refills.
- Clobetasol Propionate — 16 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 5 records in the table · Guide: How to read Medicare Part D prescriber data
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Fewer Part D prescriptions than 65% of clinicians listed under Dermatology in Boston, MA (2024, 180 clinicians with data). Median for this group: 224. Middle half: 89 to 573.
Fewer Part D prescriptions than 75% of clinicians listed under Dermatology in Massachusetts (2024, 458 clinicians with data). Median for this group: 433. Middle half: 155 to 825.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part D prescriptions went from 47 in 2022 to 121 in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2022–2024.
Practice Location & Contact Primary Location
75 Francis St
Boston, MA 021156110
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
NPPES lists 2 distinct additional practice-address records in Boston, MA. See the list
Source: CMS NPPES NPI Registry, practice location records; release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
2021
What Public CMS Data Show
Dermatology: NPPES taxonomy is a reported classification, not proof of board certification.
30-day fills
142 standardized 30-day fills in 2024
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$4,665 in 2024
The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024.
Industry payments (Open Payments)
No Open Payments records are listed for this clinician for 2019–2025.
Years since graduation
5 years (graduated 2021)
CMS Doctors and Clinicians data list 2021 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished school.
What this does not show: Years since graduation
It is not the number of years in practice, and more years does not mean better care.
Source: CMS Doctors and Clinicians National Downloadable File.
NPI first issued
2021
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
May accept Medicare assignment
CMS data show this clinician may accept Medicare assignment. Clinicians who do not always accept assignment can decide case by case.
Ask the office before your visit. If a clinician does not accept assignment for a service, they can charge up to 15% more than the Medicare-approved amount, and you may be asked to pay the full amount at the visit.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, “Does your provider accept Medicare as full payment?”
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
Mack Su has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Mack Su as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Boston and Massachusetts
Billing and prescribing volume is not a quality rating.
Medicare Part D prescriptions
Fewer Part D prescriptions than 65% of clinicians listed under Dermatology in Boston, MA (2024, 180 clinicians with data). Median for this group: 224. Middle half: 89 to 573.
Fewer Part D prescriptions than 75% of clinicians listed under Dermatology in Massachusetts (2024, 458 clinicians with data). Median for this group: 433. Middle half: 155 to 825.
Part D drug cost
A lower Part D drug cost than 70% of clinicians listed under Dermatology in Boston, MA (2024, 180 clinicians with data). Median for this group: $72,714. Middle half: $3,461 to $279,125.
A lower Part D drug cost than 75% of clinicians listed under Dermatology in Massachusetts (2024, 458 clinicians with data). Median for this group: $90,594. Middle half: $5,876 to $363,288.
266 active clinicians are listed under Dermatology with a practice address in Boston, MA (627 in Massachusetts).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Boston
18.4% of these 266 clinicians have the CMS telehealth indicator.
63.9% of these 266 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 157% from 47 in 2022 to 121 in 2024.
- 2022: 47
- 2023: 119
- 2024: 121
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30-day fills
30-day fills increased 151% from 57 in 2022 to 142 in 2024.
- 2022: 57
- 2023: 164
- 2024: 142
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Part D drug cost
Part D drug cost went from $981 in 2022 to $4,665 in 2024.
- 2022: $981
- 2023: $3,667
- 2024: $4,665
Sources: CMS Medicare Part D Prescribers (2024), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · Report an error.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Ketoconazole | Ketoconazole | 51 | 2,273 | $752.18 | 22 |
| Triamcinolone Acetonide | Triamcinolone Acetonide | 29 | 914 | $566.81 | 19 |
| Clobetasol Propionate | Clobetasol Propionate | 16 | 445 | $1,228.53 | 11 |
| Tacrolimus | Tacrolimus | 13 | 390 | $1,817.46 | — |
| Imiquimod | Imiquimod | 12 | 408 | $299.52 | — |
Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2026-06-30NUCC Taxonomy Code: 207N00000X
A dermatologist is trained to diagnose and treat pediatric and adult patients with benign and malignant disorders of the skin, mouth, external genitalia, hair and nails, as well as a number of sexually transmitted diseases. The dermatologist has had additional training and experience in the diagnosis and treatment of skin cancers, melanomas, moles and other tumors of the skin, the management of contact dermatitis and other allergic and nonallergic skin disorders, and in the recognition of the skin manifestations of systemic (including internal malignancy) and infectious diseases. Dermatologists have special training in dermatopathology and in the surgical techniques used in dermatology. They also have expertise in the management of cosmetic disorders of the skin such as hair loss and scars and the skin changes associated with aging.
NUCC Taxonomy Code: 207ND0900X
A dermatopathologist has the expertise to diagnose and monitor diseases of the skin including infectious, immunologic, degenerative and neoplastic diseases. This entails the examination and interpretation of specially prepared tissue sections, cellular scrapings and smears of skin lesions by means of routine and special (electron and fluorescent) microscopes.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - DERMATOLOGY
I20260528003380
MA
8820498967
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Secondary Practice Locations
55 Fruit St
Boston, MA 021142621
Phone: 6176430800
50 Staniford St
Boston, MA 021142517
Phone: 6177262914
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Student in an Organized Health Care Education/Training Program
Internal Medicine
Doctor of Medicine (M.D.)
Internal Medicine
Student in an Organized Health Care Education/Training Program
Internal Medicine
Student in an Organized Health Care Education/Training Program
Doctor of Medicine (M.D.)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Dermatology (license number reported to NPPES: MA 1022550)
Dermatology (license number reported to NPPES: MA 1022550)
NPI status registered as active in NPPES database
Registered at 75 FRANCIS ST, BOSTON, MA 021156110 (Tel: 6177325775)
Registered at 75 FRANCIS ST, BOSTON, MA 021156110
Recorded as MACK SU
Student in an Organized Health Care Education/Training Program
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Dermatology Specialists in Boston
- Dr. Vaneeta Sheth, MD
- Dr. Sotonye Imadojemu, MD, MBE
- Dr. Courtney Rubin, MD, MBE
- Dr. Alison Avram, MD
- Dr. Rachel Meltzer, MD
- Dr. Claire Alexanian, MD
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Mailing Address
75 Francis St
Boston, MA 021156110