Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Dr. Mark Pennington, MD

Individual provider Dermatology Physician · NPI 1720080476

Dr. Mark Pennington, MD practises Dermatology in New Britain, Connecticut. Graduated from Rutgers New Jersey Medical School in 1994, 32 years ago. Practices with Starling Physicians, PLLC, a 278-clinician group and accepts Medicare assignment. Licensed in Connecticut.

Years since qualifying
32
Trained at
Rutgers New Jersey Medical School
Licensed in
CT
In the registry since
2005
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

1 Lake St Grove Hill Medical Ctr
New Britain, CT 06052-1396
Phone: (860) 348-4242
Fax: (860) 348-4646
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Procedural Dermatology Physician (primary) Taxonomy 207NS0135X · Licence 043011 (CT)
Dermatology Physician Taxonomy 207N00000X · Licence 043011 (CT)

Record details

NPI number1720080476
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 12, 2005
Last updated in NPPESSeptember 11, 2025

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyDERMATOLOGY
Medical schoolRUTGERS NEW JERSEY MEDICAL SCHOOL
Graduated 1994 (32 years in practice)
Group practice Starling Physicians, Pllc — 278 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Removal of skin lesions 634 times · 89th percentile
Skin biopsy 262 times · 89th percentile

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients359
Services billed 2,695 a service is one billed item, such as a visit, a test or a procedure
Average patient age77

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $334 16 payments · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Colleagues at Starling Physicians, PLLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 278 clinicians in the practice; 12 are shown here.

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