Mark S. Loewen, M.D.
Surgery Physician · Hyannis, MA
Mark S. Loewen, M.D. is a surgery physician with a practice address in Hyannis, Massachusetts, and NPI 1295747319, issued on Aug 13, 2006. Check the license (Massachusetts 231062, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Mark S. Loewen
- Credential
- M.D.
- Primary taxonomy
- Surgery Physician 208600000X
- License number
- 231062 MA
Self-reported in NPPES; status is on the state search - Practice location
- 40 Lewis Bay RD, Hyannis, MA 02601
- Phone
- (508) 775-0800
- Enumerated
- Aug 13, 2006
- Record last updated
- Sep 23, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (508) 771-8565
- Medicaid ID
- 2133750 MA
- Medicare enrollment
- Enrolled (PECOS I20070720000572); accepts Medicare assignment
- Medical or professional school
- Rush Medical College Of Rush University, 2001
- Entity
- Type 1 · individual
8 nearest surgery physician records → All 1,003 in Massachusetts → Look up another NPI →
Also registered at 40 Lewis Bay RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Richard Lewis, MDSurgery Physician1770527186
- Jill Oxley, M.D.Surgery Physician1316984420
Verify Mark S. Loewen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 231062Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
8% more Medicare Part D claims than the average surgery physician in 2024
159 Medicare Part D claims for 110 beneficiaries, against an average of 147 among the 20,115 providers of this specialty who prescribed in Part D. 73 claims were for opioids.
Most prescribed
- Oxycodone Hcl31 claims
- Hydrocodone-Acetaminophen24 claims
- Tramadol Hcl17 claims
- Amoxicillin-Clavulanate Potass12 claims
- Metronidazole11 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 79.8 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $113.98
3 payments; by number, the most common kind was food and beverage; the largest payer was Boston Scientific Corporation. The 17,103 providers of this specialty with any payment received $3,513.80 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.
Bills Medicare through one group practice
- Medical Affiliates OF Cape Cod IncHyannis, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark S. Loewen among 1,003 surgery physician records in Massachusetts
Mark S. Loewen, M.D. is one of 1,003 surgery physician records with a practice address in Massachusetts. 66% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 13% of them.
- NPI issued2006 · 13% of these records are older, 58% newer
- In a Medicare fileYes · 66% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated2001 · median 2003 among the 503 with a school on file
- Record last updated2008 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208600000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Surgery Physician providers in Massachusetts
There are 1,003 surgery physician records in Massachusetts.
All 1,003 in Massachusetts → Every provider in Hyannis → Surgery Physician nationwide →
The 8 surgery physician records with the nearest ZIP codes
- Kathryn Dalton, D.O.Hyannis, MA 026011366646648
- Carlos Fonts, MDHyannis, MA 026011043286958
- Daniel Gorin, MDHyannis, MA 026011457328304
- Matthew Kalliath, D.O.Hyannis, MA 026011346623824
- Richard Lewis, MDHyannis, MA 026011770527186
- Lawrence Novak, M.D.Hyannis, MA 026011356398721
- Jill Oxley, M.D.Hyannis, MA 026011316984420
- Jose Reyes, M.D.Hyannis, MA 026011841455664
Common questions
What is Mark S. Loewen, M.D.'s NPI number?
Mark S. Loewen, M.D.'s National Provider Identifier (NPI) is 1295747319, issued on Aug 13, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark S. Loewen, M.D. located?
The NPPES record lists a practice address at 40 Lewis Bay RD, Hyannis, MA, 02601. Phone: (508) 775-0800. Providers update this record themselves, so call before visiting.
How can I verify Mark S. Loewen, M.D.'s license?
NPPES lists Massachusetts license number 231062, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mark S. Loewen, M.D. prescribe under Medicare Part D?
In 2024, Mark S. Loewen, M.D. had 159 Medicare Part D claims for 110 beneficiaries; the average among surgery physician prescribers was 147. Part D covers Medicare prescriptions only.
What is Mark S. Loewen, M.D.'s MIPS final score?
The 2023 MIPS final score is 79.8 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.