Quick answers
- Does Sarah P. Young Xu accept Medicare assignment?
- Yes. Medicare's clinician data says Sarah P. Young Xu accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Sarah P. Young Xu see?
- In 2024, CMS data shows 78 Original Medicare patients and 128 services for Sarah P. Young Xu. This counts Original Medicare only and measures volume, not quality.
- What is Sarah P. Young Xu's NPI number?
- 1700835824. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Sarah P. Young Xu, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 78 |
|---|---|
| Services billed to Medicare | 128 |
| Different services or procedures | 17 |
| Participating Medicare provider | Yes |
| Average age of these patients | 72 |
Most frequent services
- Detection test by immunoassay technique for severe acute respiratory syndrome coronavirus and influenza (87428)20 services
- Pneumococcal conjugate vaccine, 20 valent (pcv20), for intramuscular use (90677)17 services
- Administration of pneumococcal vaccine (G0009)17 services
- Routine electrocardiogram (ecg) using at least 12 leads with tracing (93005)16 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure71%
- High cholesterol46%
- Arthritis32%
- Diabetes23%
- Chronic kidney disease21%
- Depression18%
Hospitals where Sarah P. Young Xu works
Medicare's Facility Affiliation Data lists Sarah P. Young Xu at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Cottage HospitalWoodsville, NH · Critical Access Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 301301
- Littleton Regional HealthcareLittleton, NH · Critical Access Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 301302
- Mary Hitchcock Memorial HospitalLebanon, NH · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 300003
- Weeks Medical CenterLancaster, NH · Critical Access Hospital · Emergency services: listed by Medicare · CCN 301303
Practice locations
Addresses where Sarah P. Young Xu is enrolled with Medicare (CMS data updated October 2, 2026).
- 25 Mt Eustis RdLittleton, NH 03561 (603) 444‑2464
Group practices
Medicare enrollment lists Sarah P. Young Xu as a member of this group (CMS data updated October 2, 2026).
- Ammonoosuc Community Health Services, Inc.25 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Littleton
Clinicians with the same Medicare primary specialty in Littleton, NH — not a recommendation.
Other clinicians in Ammonoosuc Community Health Services, Inc.
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Harvard Medical School |
| Graduation year | 1998 (28 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1700835824 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians