Marc Sadowsky, M.D.
NPI 1558358689 · Psychiatry Physician · Lawrence, MA
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marc Sadowsky, M.D. is a Psychiatry Physician provider in Lawrence, MA (NPI 1558358689).
Provider details
- NPI number
- 1558358689
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 8176 (NH)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
1,263 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 590 | $71 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 273 | $121 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 171 | $179 |
| Assessment of Emotional Or Behavioral Problems96127 | 166 | $5 |
| Annual Depression Screening, 5 to 15 MinutesG0444 | 48 | $19 |
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 67 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Trazodone Hcl | 557 | 91 |
| Quetiapine Fumarate | 477 | 68 |
| Lorazepam | 454 | 69 |
| Clonazepam | 417 | 50 |
| Lamotrigine | 378 | 55 |
| Bupropion Hclbrand: Bupropion Xl | 352 | 56 |
| Alprazolam | 308 |
Practice location
Mailing address
Additional practice locations (2)
- 168 Kinsley StNashua, NH 03060-3634Phone: (978) 687-2321
- 70 Butler StSalem, NH 03079-3925Phone: (978) 687-2321
Registry dates
- Enumerated
- 2005-10-04
- Last updated
- 2020-03-04
- Certified
- 2020-03-04
Frequently asked questions
- What is Marc Sadowsky's NPI number?
- Marc Sadowsky's National Provider Identifier (NPI) is 1558358689, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marc Sadowsky's specialty?
- Marc Sadowsky is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Marc Sadowsky located?
- Marc Sadowsky's practice location on file with NPPES is 354 Merrimack St, Lawrence, MA 01843-1754.
- What is Marc Sadowsky's phone number?
- The practice phone number listed in the NPPES registry for Marc Sadowsky is (978) 687-2321.
- Does Marc Sadowsky accept Medicare?
- Marc Sadowsky is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marc Sadowsky's NPI active?
- Yes — Marc Sadowsky's NPI (1558358689) is active in the NPPES registry as of the last update on 2020-03-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.