Marc M. Sadowsky, M.D.
Psychiatry Physician · Lawrence, MA
Marc M. Sadowsky, M.D. is a psychiatry physician with a practice address in Lawrence, Massachusetts, and NPI 1558358689, issued on Oct 4, 2005. Check the license (Massachusetts 75226, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Marc M. Sadowsky
- Credential
- M.D.
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License numbers
- 75226 MA
8176 NH
Self-reported in NPPES; status is on the state search - Practice location
- 354 Merrimack St, Lawrence, MA 01843
- Phone
- (978) 687-2321
- Enumerated
- Oct 4, 2005
- Record last updated
- Mar 4, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (978) 685-7265
- Medicaid ID
- 30003553 NH
- Medicare enrollment
- Enrolled (PECOS I20051026001027); accepts Medicare assignment
- Medical or professional school
- Tufts University School Of Medicine, 1985
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 2,736 in Massachusetts → Look up another NPI →
Also registered at 354 Merrimack St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Marc M. Sadowsky in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 75226Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
7.8 times the Medicare Part D claims of the average psychiatry physician in 2024
7,814 Medicare Part D claims for 428 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 2% of claims.
Most prescribed
- Trazodone Hcl557 claims
- Quetiapine Fumarate477 claims
- Lorazepam454 claims
- Clonazepam417 claims
- Lamotrigine378 claims
- Bupropion Xl352 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.
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Lgh Medical Group, Inc.Nashua, NH
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Marc M. Sadowsky among 2,736 psychiatry physician records in Massachusetts
Marc M. Sadowsky, M.D. is one of 2,736 psychiatry physician records with a practice address in Massachusetts. 65% 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, 90% newer
- In a Medicare fileYes · 65% of these records are
- In the CMS Doctors and Clinicians fileYes · 45% of these records are
- Graduated1985 · median 2005 among the 1,219 with a school on file
- Record last updated2020 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Psychiatry Physician providers in Massachusetts
There are 2,736 psychiatry physician records in Massachusetts.
All 2,736 in Massachusetts → Every provider in Lawrence → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Antony Gonzales, DOLawrence, MA 018431689250771
- Pierre Mayer, M.D.Lawrence, MA 018431215976212
- Theodore Shopov, M.D.Lawrence, MA 018431710016373
- Maria Arcia, M.D.Methuen, MA 018441912172040
- Jason Jones, MDMethuen, MA 018441629065123
- Jennifer Boisture, MD, JDNorth Andover, MA 018451588742985
- Richard Heller, M.D.North Andover, MA 018451356401723
- Maureen Magauran, M.D.North Andover, MA 018451811955776
Common questions
What is Marc M. Sadowsky, M.D.'s NPI number?
Marc M. Sadowsky, M.D.'s National Provider Identifier (NPI) is 1558358689, issued on Oct 4, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Marc M. Sadowsky, M.D. located?
The NPPES record lists a practice address at 354 Merrimack St, Lawrence, MA, 01843. Phone: (978) 687-2321. Providers update this record themselves, so call before visiting.
How can I verify Marc M. Sadowsky, M.D.'s license?
NPPES lists Massachusetts license number 75226, 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 Marc M. Sadowsky, M.D. prescribe under Medicare Part D?
In 2024, Marc M. Sadowsky, M.D. had 7,814 Medicare Part D claims for 428 beneficiaries; the average among psychiatry physician prescribers was 1,000. Part D covers Medicare prescriptions only.
What is Marc M. Sadowsky, M.D.'s MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
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.