Sarah Young-Xu, M.D.
NPI 1700835824 · Family Medicine Physician · Littleton, NH
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sarah Young-Xu, M.D. is a Family Medicine Physician provider in Littleton, NH (NPI 1700835824).
Provider details
- NPI number
- 1700835824
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- NH11258 (NH)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
53 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Detection Test By Immunoassay Technique for Severe Acute Respiratory Syndrome Coronavirus and Influenza87428 | 20 | $67 |
| Administration of Pneumococcal VaccineG0009 | 17 | $32 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Tracing93005 | 16 | $6 |
Typical Medicare-allowed amounts for these services range $6–$67 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 67 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 142 | 36 |
| Amlodipine Besylate | 134 | 35 |
| Losartan Potassium | 120 | 29 |
| Omeprazole | 117 | 35 |
| Levothyroxine Sodium | 114 | 26 |
| Gabapentin | 86 | 24 |
| Hydrochlorothiazide | 80 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-05-08
- Last updated
- 2010-03-03
Frequently asked questions
- What is Sarah Young-Xu's NPI number?
- Sarah Young-Xu's National Provider Identifier (NPI) is 1700835824, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sarah Young-Xu's specialty?
- Sarah Young-Xu is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Sarah Young-Xu located?
- Sarah Young-Xu's practice location on file with NPPES is 25 Mt. Eustis Road, Littleton, NH 03561-3712.
- What is Sarah Young-Xu's phone number?
- The practice phone number listed in the NPPES registry for Sarah Young-Xu is (603) 444-2464.
- Does Sarah Young-Xu accept Medicare?
- Sarah Young-Xu is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Sarah Young-Xu's NPI active?
- Yes — Sarah Young-Xu's NPI (1700835824) is active in the NPPES registry as of the last update on 2010-03-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.