Dr. Mark D. Pennington, MD
- Medicare services, 2024
- 2,510
- Medicare patients, 2024
- 359
- Part D claims, 2024
- 1,085
- Industry payments
- $560
- Affiliated sites
- 1
- Practice address
- 1111 Cromwell Avenue - Suite 100, Rocky Hill, CT 06067
- Practice phone
- Call (860) 667-1815
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Rocky Hill Surgery Center
Surgery Center - Medicare-Certified · Rocky Hill, Connecticut
Find Dr. Pennington's professional email, personal email and mobile number
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Dr. Mark D. Pennington is a procedural dermatology physician in Rocky Hill, Connecticut
Dr. Pennington practices at Rocky Hill Surgery Center in Rocky Hill, Connecticut.
Dr. Pennington's NPI, 1720080476, was assigned on August 12, 2005. Dr. Pennington graduated from Rutgers New Jersey Medical School in 1994. Dr. Pennington holds Connecticut license 043011.
- NPI
- 1720080476NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1052353364
- NPI enumeration date
- August 12, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (860) 667-1815
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 58
- Medical school graduation
- 1994
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Mark D. Pennington practices at Rocky Hill Surgery Center in Rocky Hill, Connecticut
Dr. Pennington's primary practice is Rocky Hill Surgery Center, at 1111 Cromwell Avenue - Suite 100, Rocky Hill, CT 06067. The practice phone is (860) 667-1815.
- Rocky Hill Surgery Center1111 Cromwell Avenue - Suite 100, Rocky Hill, CT 06067Phone(860) 667-1815
Source: Dmand AI Affiliation Data
Dr. Mark D. Pennington is affiliated with 1 site of care and 1 medical group
Dr. Pennington's primary practice is Rocky Hill Surgery Center in Rocky Hill, Connecticut. The medical group on file is Starling Physicians.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Mark D. Pennington's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Pennington practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Rocky Hill Surgery Center | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Mark D. Pennington is one of 8 procedural dermatology physicians in Connecticut
Procedural dermatology is Dr. Pennington's primary specialty in the NPI Registry, under taxonomy code 207NS0135X. Dr. Pennington is licensed in Connecticut.
Specialties and state licenses
- Procedural dermatology, ConnecticutPrimary
Procedural dermatology physicians near Dr. Pennington
Counts of procedural dermatology physicians 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. Mark D. Pennington billed Medicare for 2,510 services in 2024
CMS data shows 2,510 Medicare services from Dr. Pennington across 11 procedure codes in 2024, for 359 Medicare patients. Medicare paid $133,047 for them. Every service was in an office.
Dr. Pennington's Medicare services by type, 2024
- Surgery1,526
- Office and hospital visits956
- Drugs given in the office14
- Tests and treatments14
Dr. Pennington'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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Source: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data
Dr. Mark D. Pennington treated 359 Medicare patients in 2024, average age 77
CMS counts 359 Medicare patients who saw Dr. Pennington in 2024. The largest group is 75 to 84, with 157 patients. 75% of them have high cholesterol, and 71% have high blood pressure. 11% are also on Medicaid. Their average risk score is 1.11, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Pennington's median patient age at 69, with 49% women.
Dr. Pennington's Medicare patients by age, 2024
Dr. Pennington's Medicare patients by sex, 2024
- Women16446%
- Men19554%
Chronic conditions among Dr. Pennington's Medicare patients, 2024
- High cholesterol75%
- High blood pressure71%
- Arthritis42%
- Ischemic heart disease23%
- Cancer22%
- Atrial fibrillation20%
- Diabetes20%
- Anxiety18%
Share of Medicare patients with each condition. A patient can have several.
Dr. Pennington's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 69
Patient panel by sex, all payers
- Women49%
- Men50%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Mark D. Pennington wrote 1,085 Medicare Part D claims in 2024
In 2024, Dr. Pennington wrote 1,085 Medicare Part D claims for 476 patients. 89% of them were for generic drugs. CMS names the drug for 963 of them, across 18 drugs with 11 or more claims each, at $200,243 in total drug cost.
Dr. Pennington's Part D claims by kind of drug, 2024
- Generic967 claims89%
- Brand-name118 claims11%
Dr. Pennington'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. Pennington's Part D claims, 2024
- Antibiotics2%24 of 1,085 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
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. Mark D. Pennington ranks in the 91st percentile for removal of skin lesions in Medicare
Dr. Pennington accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 784 procedures of removal of skin lesions by Dr. Pennington, more than 91% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Pennington ranks in Medicare procedure volume
- Removal of skin lesions
- 91st percentile784 procedures
- Skin biopsy
- 91st percentile308 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Mark D. Pennington received $560 in industry payments from 2024 to 2025
CMS Open Payments shows 24 general payments to Dr. Pennington from 10 drug and device companies from 2024 to 2025. Food and beverage make up the largest share, 100% of the total. Bristol-Myers Squibb Company paid the most, $187.
General payments to Dr. Pennington by program year, 2024 to 2025
Companies that paid Dr. Pennington the most, 2024 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Mark D. Pennington graduated from Rutgers New Jersey Medical School
Dr. Pennington graduated from Rutgers New Jersey Medical School in 1994.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Mark D. Pennington'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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| 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. Mark D. Pennington
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. Mark D. Pennington's NPI number?
Dr. Mark D. Pennington's NPI number is 1720080476. It was assigned on August 12, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Mark D. Pennington?
Dr. Mark D. Pennington is a procedural dermatology physician in Rocky Hill, Connecticut. The primary specialty in the NPI Registry is Procedural Dermatology Physician (taxonomy code 207NS0135X).
Where does Dr. Mark D. Pennington practice?
Dr. Pennington practices at 1111 Cromwell Avenue - Suite 100, Rocky Hill, CT 06067. Dr. Pennington's primary practice is Rocky Hill Surgery Center in Rocky Hill, Connecticut.
What is Dr. Mark D. Pennington's office phone number?
The practice phone on file for Dr. Pennington is (860) 667-1815.
What is Dr. Mark D. Pennington's medical license number?
Dr. Pennington holds Connecticut license 043011.
What medical group is Dr. Mark D. Pennington part of?
Dr. Pennington is linked to Starling Physicians.
Does Dr. Mark D. Pennington accept Medicare?
Yes. CMS data shows Dr. Pennington billed Medicare for 2,510 services in 2024, and Dr. Pennington accepts Medicare assignment.
How many Medicare patients does Dr. Mark D. Pennington see?
CMS counts 359 Medicare patients who saw Dr. Pennington in 2024, with an average age of 77.
What services does Dr. Mark D. Pennington bill to Medicare?
In 2024, Dr. Pennington's most billed Medicare services were office visit, established patient (99213), surgery: skin and soft tissue (17003) and surgery: skin and soft tissue (17110).
Where did Dr. Mark D. Pennington go to medical school?
Dr. Pennington graduated from Rutgers New Jersey Medical School in 1994.
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What drugs does Dr. Mark D. Pennington prescribe most?
In 2024 Medicare Part D data, Dr. Pennington's most prescribed drugs by claims were Ketoconazole, Triamcinolone Acetonide and Metronidazole.
Has Dr. Mark D. Pennington received payments from drug or device companies?
CMS Open Payments shows $560 in general payments to Dr. Pennington from 10 companies from 2024 to 2025. The largest total came from Bristol-Myers Squibb Company.
How long has Dr. Mark D. Pennington been practicing?
Dr. Pennington graduated from medical school in 1994, 32 years ago.
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