Tina Xu, D.O.
NPI 1659807444 · Family Medicine Physician · Issaquah, WA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Tina Xu, D.O. is a Family Medicine Physician provider in Issaquah, WA (NPI 1659807444).
Provider details
- NPI number
- 1659807444
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Female
- Sole proprietor
- No
- License
- OP61502180 (WA)
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
9 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
120 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) |
|---|---|---|
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 52 | $17 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 25 | $104 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 23 | $191 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 20 | $145 |
Typical Medicare-allowed amounts for these services range $17–$191 (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 · 11 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 55 | 25 |
| Amlodipine Besylate | 28 | — |
| Losartan Potassium | 23 | — |
| Lisinopril | 22 | 11 |
| Gabapentin | 20 | — |
| Levothyroxine Sodium | 20 | 13 |
| Rosuvastatin Calcium |
Practice location
Mailing address
Registry dates
- Enumerated
- 2017-05-11
- Last updated
- 2025-11-19
- Certified
- 2025-11-19
Frequently asked questions
- What is Tina Xu's NPI number?
- Tina Xu's National Provider Identifier (NPI) is 1659807444, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Tina Xu's specialty?
- Tina Xu is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Tina Xu located?
- Tina Xu's practice location on file with NPPES is 751 Ne Blakely Dr Ste 5010, Issaquah, WA 98029-6201.
- What is Tina Xu's phone number?
- The practice phone number listed in the NPPES registry for Tina Xu is (425) 394-0700.
- Does Tina Xu accept Medicare?
- Tina Xu is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Tina Xu's NPI active?
- Yes — Tina Xu's NPI (1659807444) is active in the NPPES registry as of the last update on 2025-11-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.