Anni Xu
NPI 1336553841 · Emergency Medicine Physician · Williamsport, PA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Anni Xu is a Emergency Medicine Physician provider in Williamsport, PA (NPI 1336553841).
Provider details
- NPI number
- 1336553841
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Sex
- Female
- Sole proprietor
- No
- License
- MD465161 (PA)
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
12 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
405 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) |
|---|---|---|
| Emergency Department Visit With High Level of Medical Decision Making99285 | 177 | $172 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 161 | $118 |
| Emergency Department Visit With Low Level of Medical Decision Making99283 | 30 | $69 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 25 | $8 |
| Critical Care, First 30-74 Minutes99291 | 12 | $208 |
Typical Medicare-allowed amounts for these services range $8–$208 (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 · 15 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Cefdinir | 74 | 74 |
| Azithromycin | 52 | 49 |
| Ondansetronbrand: Ondansetron Odt | 48 | 48 |
| Prednisone | 39 | 36 |
| Cyclobenzaprine Hcl | 35 | 35 |
| Tramadol Hcl | 35 | 35 |
| Methylprednisolone | 31 | 30 |
| Oxycodone Hcl |
Practice location
Mailing address
Registry dates
- Enumerated
- 2014-06-12
- Last updated
- 2025-12-05
Frequently asked questions
- What is Anni Xu's NPI number?
- Anni Xu's National Provider Identifier (NPI) is 1336553841, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Anni Xu's specialty?
- Anni Xu is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Anni Xu located?
- Anni Xu's practice location on file with NPPES is 700 High St, Williamsport, PA 17701-3100.
- What is Anni Xu's phone number?
- The practice phone number listed in the NPPES registry for Anni Xu is (570) 321-2125.
- Does Anni Xu accept Medicare?
- Anni Xu is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Anni Xu's NPI active?
- Yes — Anni Xu's NPI (1336553841) is active in the NPPES registry as of the last update on 2025-12-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.