Mark Linwood Simmons, M.D.
Internal Medicine Physician · Lancaster, PA
Mark Linwood Simmons, M.D. is an internal medicine physician with a practice address in Lancaster, Pennsylvania, and NPI 1619959285, issued on Nov 18, 2005. Check the license (Pennsylvania MD064373L, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Mark Linwood Simmons
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- MD064373L PA
Self-reported in NPPES; status is on the state search - Practice location
- 2110 Harrisburg Pike, Lancaster, PA 17601
- Phone
- (717) 544-3191
- Enumerated
- Nov 18, 2005
- Record last updated
- Sep 6, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (717) 544-3637
- Medicaid ID
- 1018709640001 PA
- Medicare enrollment
- Enrolled (PECOS I20070306000154); accepts Medicare assignment
- Medical or professional school
- Pennsylvania State University College Of Medicine, 1995
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,300 in Pennsylvania → Look up another NPI →
Also registered at 2110 Harrisburg Pike
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sylvia Allwardt, MDInternal Medicine Physician1609819580
- Maria Calderon, MDInternal Medicine Physician1326152760
- Paul Conslato, M.D.Internal Medicine Physician1366431934
- Kathryn Couch, CRNPFamily Nurse Practitioner1437558962
- Thomas Grana, D.O.Internal Medicine Physician1437247954
- Viviana Hardy, M.D.Endocrinology, Diabetes & Metabolism Physician1093703803
Verify Mark Linwood Simmons in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license MD064373LCheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
37% more Medicare Part D claims than the average internal medicine physician in 2024
4,364 Medicare Part D claims for 503 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 60 claims were for opioids.
Most prescribed
- Atorvastatin Calcium254 claims
- Lisinopril220 claims
- Levothyroxine Sodium203 claims
- Amlodipine Besylate161 claims
- Omeprazole152 claims
- Losartan Potassium151 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.
Bills Medicare through one group practice
- Lancaster General Medical GroupLancaster, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark Linwood Simmons among 7,300 internal medicine physician records in Pennsylvania
Mark Linwood Simmons, M.D. 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 91% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated1995 · median 2008 among the 4,208 with a school on file
- Record last updated2007 · 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).
91 internal medicine physician records list a practice address in Lancaster
They are 91 of the 5,378 NPPES records with a practice address in Lancaster, and 7,300 internal medicine physician records in Pennsylvania.
All 7,300 in Pennsylvania → Every provider in Lancaster → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Sylvia Allwardt, MDLancaster, PA 176011609819580
- Jennie Barbieri, MDLancaster, PA 176011285836015
- Jarol Boan, M.D.Lancaster, PA 176011427007541
- Maria Calderon, MDLancaster, PA 176011326152760
- Paul Conslato, M.D.Lancaster, PA 176011366431934
- Elizabeth Ehrlich Chapman, DOLancaster, PA 176011528450483
- Marion George, MDLancaster, PA 176011205816295
- Thomas Grana, D.O.Lancaster, PA 176011437247954
Common questions
What is Mark Linwood Simmons, M.D.'s NPI number?
Mark Linwood Simmons, M.D.'s National Provider Identifier (NPI) is 1619959285, issued on Nov 18, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Mark Linwood Simmons, M.D. located?
The NPPES record lists a practice address at 2110 Harrisburg Pike, Lancaster, PA, 17601. Phone: (717) 544-3191. Providers update this record themselves, so call before visiting.
How can I verify Mark Linwood Simmons, M.D.'s license?
NPPES lists Pennsylvania license number MD064373L, 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 Linwood Simmons, M.D. prescribe under Medicare Part D?
In 2024, Mark Linwood Simmons, M.D. had 4,364 Medicare Part D claims for 503 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.