Dr. Margaret Litwin Sommerville, MD
- Medicare services, 2024
- 538
- Medicare patients, 2024
- 97
- Part D claims, 2024
- 81
- Affiliated sites
- 1
- State license
- 1
- Practice address
- 5530 Wisconsin Ave, Chevy Chase, MD 20815
- Practice phone
- Call (301) 657-9876
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Summit Orthopedics
Chevy Chase, Maryland
Find Dr. Sommerville's professional email, personal email and mobile number
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Dr. Margaret Litwin Sommerville is a dermatologist in Chevy Chase, Maryland
Dr. Sommerville practices at Summit Orthopedics in Chevy Chase, Maryland.
Dr. Sommerville's NPI, 1861671505, was assigned on October 30, 2007. Dr. Sommerville graduated from George Washington University School of Medicine in 1991. Dr. Sommerville holds Maryland license D0061245.
- NPI
- 1861671505NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2769459163
- NPI enumeration date
- October 30, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (301) 657-9876
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 61
- Medical school graduation
- 1991
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Margaret Litwin Sommerville practices at Summit Orthopedics in Chevy Chase, Maryland
Dr. Sommerville's primary practice is Summit Orthopedics, at 5530 Wisconsin Ave, Chevy Chase, MD 20815 in Montgomery County. The practice phone is (301) 657-9876.
- Summit Orthopedics5530 Wisconsin Ave, Chevy Chase, MD 20815 · Montgomery CountyPhone(301) 657-9876
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Margaret Litwin Sommerville is affiliated with 2 sites of care
Dr. Sommerville's primary practice is Summit Orthopedics in Chevy Chase, Maryland. Dmand AI also links Dr. Sommerville to 1 physician office, 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. Margaret Litwin Sommerville's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Sommerville practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Summit Orthopedics | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Margaret Litwin Sommerville is one of 270 dermatologists in Maryland
Dermatology is Dr. Sommerville's primary specialty in the NPI Registry, under taxonomy code 207N00000X. Dr. Sommerville is licensed in Maryland.
Specialties and state licenses
- Dermatology, MarylandPrimary
Dermatologists near Dr. Sommerville
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. Margaret Litwin Sommerville billed Medicare for 538 services in 2024
CMS data shows 538 Medicare services from Dr. Sommerville across 7 procedure codes in 2024, for 97 Medicare patients. Medicare paid $25,435 for them. Every service was in an office.
Dr. Sommerville's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Surgery
- 2023: 5072024: 40720%
- Office and hospital visits
- 2023: 1302024: 1311%
Dr. Sommerville compared with the Maryland median for dermatologists, 2024
- Dr. Sommerville
- Maryland median
- Medicare services
- 538vs 1,74869% below
- Medicare patients
- 97vs 48880% below
- Part D claims
- 50vs 35586% below
Medians across 249 dermatologists in Maryland with Dmand AI profiles that report each measure.
Dr. Sommerville'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. Margaret Litwin Sommerville treated 97 Medicare patients in 2024, average age 75
CMS counts 97 Medicare patients who saw Dr. Sommerville in 2024. The largest group is 65 to 74, with 57 patients. 68% of them have high cholesterol, and 52% have high blood pressure. Their average risk score is 0.66, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Sommerville's median patient age at 55, with 61% women.
Dr. Sommerville's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Sommerville's Medicare patients by sex, 2024
- Women7274%
- Men2526%
Chronic conditions among Dr. Sommerville's Medicare patients, 2024
- High cholesterol68%
- High blood pressure52%
- Arthritis39%
- Osteoporosis24%
- Anxiety16%
- Ischemic heart disease15%
- Depression12%
- Mood disorders12%
Share of Medicare patients with each condition. A patient can have several.
Dr. Sommerville's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 55
Patient panel by sex, all payers
- Women61%
- Men39%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Margaret Litwin Sommerville wrote 81 Medicare Part D claims in 2024
In 2024, Dr. Sommerville wrote 81 Medicare Part D claims for 38 patients. 98% of them were for generic drugs. CMS names the drug for 50 of them, across 3 drugs with 11 or more claims each, at $791 in total drug cost. In 2023, CMS named 27 claims across 2 drugs.
Dr. Sommerville's Part D claims by kind of drug, 2024
- Generic79 claims98%
- Brand-name and other2 claims2%
Dr. Sommerville'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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 272024: 5085%
Drugs named by CMS: 3 in 2024, 2 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. Margaret Litwin Sommerville ranks in the 82nd percentile for removal of skin lesions in Medicare
Dr. Sommerville accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 301 procedures of removal of skin lesions by Dr. Sommerville, more than 82% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Sommerville ranks in Medicare procedure volume
- Removal of skin lesions
- 82nd percentile301 procedures
- Skin biopsy
- 66th percentile35 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. Margaret Litwin Sommerville graduated from George Washington University School of Medicine
Dr. Sommerville graduated from George Washington University School of Medicine in 1991.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Margaret Litwin Sommerville'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) |
| 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. Margaret Litwin Sommerville
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. Margaret Litwin Sommerville's NPI number?
Dr. Margaret Litwin Sommerville's NPI number is 1861671505. It was assigned on October 30, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Margaret Litwin Sommerville?
Dr. Margaret Litwin Sommerville is a dermatologist in Chevy Chase, Maryland. The primary specialty in the NPI Registry is Dermatology Physician (taxonomy code 207N00000X).
Where does Dr. Margaret Litwin Sommerville practice?
Dr. Sommerville practices at 5530 Wisconsin Ave, Chevy Chase, MD 20815. Dr. Sommerville's primary practice is Summit Orthopedics in Chevy Chase, Maryland. Dmand AI also links Dr. Sommerville to 1 physician office.
What is Dr. Margaret Litwin Sommerville's office phone number?
The practice phone on file for Dr. Sommerville is (301) 657-9876.
What is Dr. Margaret Litwin Sommerville's medical license number?
Dr. Sommerville holds Maryland license D0061245.
Does Dr. Margaret Litwin Sommerville accept Medicare?
Yes. CMS data shows Dr. Sommerville billed Medicare for 538 services in 2024, and Dr. Sommerville accepts Medicare assignment.
How many Medicare patients does Dr. Margaret Litwin Sommerville see?
CMS counts 97 Medicare patients who saw Dr. Sommerville in 2024, with an average age of 75.
What services does Dr. Margaret Litwin Sommerville bill to Medicare?
In 2024, Dr. Sommerville'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. Margaret Litwin Sommerville go to medical school?
Dr. Sommerville graduated from George Washington University School of Medicine in 1991.
What drugs does Dr. Margaret Litwin Sommerville prescribe most?
In 2024 Medicare Part D data, Dr. Sommerville's most prescribed drugs by claims were Hydrocortisone, Ketoconazole and Triamcinolone Acetonide.
How long has Dr. Margaret Litwin Sommerville been practicing?
Dr. Sommerville graduated from medical school in 1991, 35 years ago.
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