Joseph Xu, MD
NPI 1194389809 · Internal Medicine Physician · Elk Grove, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Joseph Xu, MD is a Internal Medicine Physician provider in Elk Grove, CA (NPI 1194389809).
Provider details
- NPI number
- 1194389809
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 309778-01 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
7 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
67 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 38 | $126 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 18 | $183 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 11 | $96 |
Typical Medicare-allowed amounts for these services range $96–$183 (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 · 18 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 50 | 29 |
| Amlodipine Besylate | 38 | 19 |
| Losartan Potassium | 32 | 20 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 28 | 13 |
| Omeprazole | 26 | 12 |
| Lisinopril | 21 | 13 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2019-04-29
- Last updated
- 2024-01-12
- Certified
- 2024-01-12
Frequently asked questions
- What is Joseph Xu's NPI number?
- Joseph Xu's National Provider Identifier (NPI) is 1194389809, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joseph Xu's specialty?
- Joseph Xu is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Joseph Xu located?
- Joseph Xu's practice location on file with NPPES is 8170 Laguna Blvd Ste 101, Elk Grove, CA 95758-7902.
- What is Joseph Xu's phone number?
- The practice phone number listed in the NPPES registry for Joseph Xu is (916) 478-6565.
- Does Joseph Xu accept Medicare?
- Joseph Xu is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Joseph Xu's NPI active?
- Yes — Joseph Xu's NPI (1194389809) is active in the NPPES registry as of the last update on 2024-01-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.