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SERENITY MEDICAL WEIGHT LOSS CLINIC LLC
NPI 1003608225
Internal Medicine in Nashua, NH

Active since May 22, 2025
154 BROAD ST STE 1510, NASHUA, NH 03063(617) 272-7057(949) 864-3519 Get Directions Write a Review

NPPES record last updated: September 26, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Serenity Medical Weight Loss Clinic Llc NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

SERENITY MEDICAL WEIGHT LOSS CLINIC LLC (NPI 1003608225), doing business as Serenity Primary Care And Medical Weight Loss Clinic, is a healthcare organization registered as an internal medicine in Nashua, New Hampshire and active in the NPI registry since May 2025. The organization lists Xiaoxi Ouyang, Owner, as its authorized official.

NPPES Registry Identity

NPI1003608225
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameSERENITY MEDICAL WEIGHT LOSS CLINIC LLC
Location Address154 BROAD ST STE 1510Nashua, NH 03063-3207
Mailing Address154 Broad St Ste 1510Nashua, NH 03063-3207 · (617) 272-7057 · Fax (949) 864-3519
Phone(617) 272-7057
Fax(949) 864-3519
Organization SubpartNo
Authorized OfficialXiaoxi OuyangOwner · (617) 272-7057
Enumeration DateMay 22, 2025
Last NPPES UpdateSeptember 26, 2025
NPPES CertifiedSeptember 26, 2025
✔ NPI 1003608225 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
154 BROAD ST STE 1510, Nashua, NH 03063
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Other Names 1

Doing Business AsSerenity Primary Care And Medical Weight Loss Clinic

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include WellSense Health Plan.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Serenity Medical Weight Loss Clinic Llc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Serenity Medical Weight Loss Clinic LLC, which bills Medicare for the services this clinician delivers.

Clinician (1)

Xiaoxi Ouyang, MD
Internal Medicine
NPI 1649479064
154 BROAD ST STE 1510
Nashua, NH 03063
(617) 272-7057
✔ PECOS✔ Accepts MedicareSame address

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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 Serenity Medical Weight Loss Clinic LLC's NPI number?

The NPI number for Serenity Medical Weight Loss Clinic LLC is 1003608225. It was assigned to this organization in the NPPES registry on May 22, 2025. The provider is doing business as Serenity Primary Care and Medical Weight Loss Clinic.

Where is Serenity Medical Weight Loss Clinic LLC located?

Serenity Medical Weight Loss Clinic LLC is located at 154 Broad St Ste 1510, Nashua, NH 03063. The listed phone number is (617) 272-7057.

What is Serenity Medical Weight Loss Clinic LLC's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Serenity Medical Weight Loss Clinic LLC enrolled in Medicare?

Yes. Serenity Medical Weight Loss Clinic LLC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Serenity Medical Weight Loss Clinic LLC?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Internal Medicine) reassigns their Medicare billing to Serenity Medical Weight Loss Clinic LLC. 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. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

What insurance does Serenity Medical Weight Loss Clinic LLC accept?

Health plans from WellSense Health Plan list Serenity Medical Weight Loss Clinic LLC 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 Serenity Medical Weight Loss Clinic LLC was last updated on September 26, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 months 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.