Mark Lasorda, DO
Internal Medicine Physician · West Chester, PA
Mark Lasorda, DO is an internal medicine physician with a practice address in West Chester, Pennsylvania, and NPI 1871913954, issued on Apr 16, 2014. Check the license (Pennsylvania OS019447, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Mark Lasorda
- Credential
- DO
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- OS019447 PA
Self-reported in NPPES; status is on the state search - Practice location
- 210 Willowbrook LN, West Chester, PA 19382
- Phone
- (610) 696-8900
- Enumerated
- Apr 16, 2014
- Record last updated
- Aug 27, 2018 (not updated in 8 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,300 in Pennsylvania → Look up another NPI →
Also registered at 210 Willowbrook LN
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Rama Mandapati, MDInternal Medicine Physician1710178074
Verify Mark Lasorda in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license OS019447Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
87% fewer Medicare Part D claims than the average internal medicine physician in 2024
397 Medicare Part D claims for 50 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Levothyroxine Sodium27 claims
- Rosuvastatin Calcium24 claims
- Losartan Potassium22 claims
- Atorvastatin Calcium16 claims
- Clonazepam16 claims
- Amlodipine Besylate13 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $26.83
1 payment: food and beverage; the largest payer was iRhythm Technologies, Inc. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Mark Lasorda among 7,300 internal medicine physician records in Pennsylvania
Mark Lasorda, DO is one of 7,300 internal medicine physician records with a practice address in Pennsylvania. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2014, is newer than 60% of them.
- NPI issued2014 · 60% of these records are older, 38% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileNo · 58% of these records are
- Record last updated2018 · 56% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
57 internal medicine physician records list a practice address in West Chester
They are 57 of the 2,831 NPPES records with a practice address in West Chester, and 7,300 internal medicine physician records in Pennsylvania.
All 7,300 in Pennsylvania → Every provider in West Chester → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Anne Bowen, M.D.West Chester, PA 193821619967635
- Thomas Burgoon, M.D.West Chester, PA 193821184941452
- Ronald Fronduti, MDWest Chester, PA 193821568494847
- Sonia Ignatius, MDWest Chester, PA 193821710269683
- Lisa Johnson, M.D.West Chester, PA 193821740279843
- Shabih Khan, MDWest Chester, PA 193821578571063
- Rama Mandapati, MDWest Chester, PA 193821710178074
- David Nalin, M.D.West Chester, PA 193821083967863
Common questions
What is Mark Lasorda, DO's NPI number?
Mark Lasorda, DO's National Provider Identifier (NPI) is 1871913954, issued on Apr 16, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Mark Lasorda, DO located?
The NPPES record lists a practice address at 210 Willowbrook LN, West Chester, PA, 19382. Phone: (610) 696-8900. Providers update this record themselves, so call before visiting.
How can I verify Mark Lasorda, DO's license?
NPPES lists Pennsylvania license number OS019447, as entered by the provider. Search the Pennsylvania Department of State (PALS) at https://www.pals.pa.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mark Lasorda, DO prescribe under Medicare Part D?
In 2024, Mark Lasorda, DO had 397 Medicare Part D claims for 50 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.