MHS PRIMARY CARE
NPI 1104043017
Family Medicine in Old Saybrook, CT
About Mhs Primary Care NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MHS PRIMARY CARE (NPI 1104043017) is a healthcare organization registered as a family medicine in Old Saybrook, Connecticut and active in the NPI registry since April 2007. The organization holds a CLIA Microscopy certificate valid through November 18, 2027 and lists Susan Serkey, Practice Administrator, as its authorized official.
NPPES Registry Identity
Specialties & Licenses 4
Other Identifiers 5
Group Practice 1
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Mhs Primary Care is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
147Medicare enrollment records show 147 clinicians reassign Medicare billing to Mhs Primary Care, which bills Medicare for the services they deliver. Of these, 4 practice at this address and 36 within 10 miles. Listed here are the 20 practicing nearest to this location.
Clinicians by Medicare Specialty 15
Nearest to this location (20)
See all 147Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
CLIA Laboratory Certificates CMS CLIA
Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.
Certificate for Provider-Performed Microscopy Procedures (PPMP) 07D0879309
Mhs Primary Care, Inc · Old Saybrook, CTFrequently 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 Mhs Primary Care's NPI number?
The NPI number for Mhs Primary Care is 1104043017. It was assigned to this organization in the NPPES registry on April 20, 2007.
Where is Mhs Primary Care located?
Mhs Primary Care is located at 154 Main St, Old Saybrook, CT 06475. The listed phone number is (860) 395-1212.
What is Mhs Primary Care's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is Mhs Primary Care enrolled in Medicare?
Yes. Mhs Primary Care is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Mhs Primary Care?
According to the CMS Revalidation Reassignment List (October 2026 release), 147 clinicians in 15 Medicare specialties reassign their Medicare billing to Mhs Primary Care. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. The largest specialties are Nurse Practitioner (47), Family Practice (44) and General Surgery (10). Of these, 4 practice at this address and 36 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Does Mhs Primary Care hold a CLIA laboratory certificate?
Yes. A Certificate for Provider-Performed Microscopy Procedures (PPMP) (number 07D0879309) is associated with this NPI, valid through November 18, 2027. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.
When was this NPI record last updated?
The NPPES record for Mhs Primary Care was last updated on January 20, 2017. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.
# Mhs Primary Care · NPI 1104043017
Family Medicine organization in Old Saybrook, Connecticut. Organization record, active in the CMS NPPES registry since April 20, 2007.
## Identity
- **NPI:** 1104043017 (Entity type: Organization)
- **Enumerated:** April 20, 2007
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **Organization subpart:** No
- **Authorized official:** Susan Serkey, PRACTICE ADMINISTRATOR
## Practice location
- **Address:** 154 MAIN ST, Old Saybrook, CT 06475-2373
- **Phone:** (860) 395-1212 · **Fax:** (860) 358-8654
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 147 clinicians in 15 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Nurse Practitioner (47), Family Practice (44), General Surgery (10); 4 practice at this address and 36 within 10 miles; [full list](https://npiprofile.com/npi/1104043017/clinicians) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** January 20, 2017
- **Other identifiers:** Medicare PIN C02139 (CT); Medicaid 04173259 (CT); Medicare PIN C02187 (CT); and 2 more
- **CLIA laboratory certificates:** 1 on file
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Source: [NPI Profile](https://npiprofile.com/npi/1104043017) · Data from the CMS NPPES public registry.