DR. MARC M SADOWSKY (M.D.) – Psychiatry Physician, NPI 1558358689
Psychiatry Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
1,743 PSYCHIATRY in MA
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Provider Addresses for DR. MARC M SADOWSKY (M.D.)
Riverwalk Building 1, 354, Merrimack Street, Lawrence, Essex County, Massachusetts, 01842, United States
LAWRENCE, MA 018431754
Phone: (978) 687-2321
Fax: (978) 685-7265
Type: Mailing
168 Kinsley St
Nashua, NH 030603634
Phone: (978) 687-2321
Type: Location
70 Butler St
Salem, NH 030793925
Phone: (978) 687-2321
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
No Open Payments data available for this provider.
This can happen when there are no reportable CMS Open Payments records.
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2005-10-26
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking 2 Medicare enrollment records; no due dates published yet.
Enrollment records
2
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20050418000656 | I | Psychiatry | MA | TBD |
| I20051026001027 | I | Psychiatry | NH | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 99443 | Telephone medical discussion with physician, 21-30 minutes | 583 | 278 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 377 | 242 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 147 | 112 | $0 |
| 99212 | Established patient office or other outpatient visit, 10-19 minutes | 99 | 82 | $0 |
| 99442 | Telephone medical discussion with physician, 11-20 minutes | 22 | 20 | $0 |
Insurance plans in this area (ZIP 01843)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| PSYCHIATRY | MA | 90833 | Psychotherapy, 30 minutes with patient and/or family member | 17 | 11 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| Certified Nurse Midwife (Cnm) | ME | |
| Family Practice, Addiction Medicine | MA | |
| - | MA | |
| Nurse Practitioner | MA | |
| - | MA | |
| Physician Assistant | NC | |
| Family Practice | MA | |
| O B S T E T R I C S/ G Y N E C O L O G Y | MA | |
| Nurse Practitioner | MA | |
| Family Practice | MA |
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