MITCHELL KOSSAK LMHC
NPI 1598971160
Counselor - Mental Health in Watertown, MA
About Mitchell Kossak Lmhc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MITCHELL KOSSAK LMHC (NPI 1598971160) is an individual mental health provider in Watertown, Massachusetts, licensed in Massachusetts (573) and active in the NPI registry since May 2007. He has opted out of Medicare through September 22, 2027.
NPPES Registry Identity
Specialties & Licenses
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.
Medicare Enrollment Status
Opted out of Medicare
Mitchell Kossak Lmhc has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from September 22, 2025 through September 22, 2027.
Other Providers at the Same Location NPPES 12
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
WATERTOWN, MA 02472
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Mitchell Kossak's NPI number?
The NPI number for Mitchell Kossak is 1598971160. It was assigned to this individual provider in the NPPES registry on May 14, 2007.
Where is Mitchell Kossak located?
Mitchell Kossak practices at 22 Mount Auburn St, Watertown, MA 02472. The listed phone number is (617) 926-3221.
What is Mitchell Kossak's specialty?
The primary specialty registered for this NPI is Counselor, specializing in Mental Health, with taxonomy code 101YM0800X.
Is Mitchell Kossak enrolled in Medicare?
No. Mitchell Kossak has opted out of Medicare through September 22, 2027. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out.
What insurance does Mitchell Kossak accept?
Health plans from Harvard Pilgrim Health Care list Mitchell Kossak as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Mitchell Kossak was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Mitchell Kossak, LMHC · NPI 1598971160
Mental Health provider in Watertown, Massachusetts. Individual provider, active in the CMS NPPES registry since May 14, 2007.
## Identity
- **NPI:** 1598971160 (Entity type: Individual)
- **Enumerated:** May 14, 2007
- **Primary specialty:** Counselor - Mental Health · taxonomy 101YM0800X
- **State license:** 573 (Massachusetts)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 22 MOUNT AUBURN ST, Watertown, MA 02472-3992
- **Phone:** (617) 926-3221
## Medicare
- **Medicare:** Opted out of Medicare (opt-out affidavit on file, in effect through September 22, 2027); services are provided under private contract
## Record status
- **NPPES last updated:** July 8, 2007
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Source: [NPI Profile](https://npiprofile.com/npi/1598971160) · Data from the CMS NPPES public registry.