Crystal Unzueta, MD
NPI 1538574470 · Family Medicine Physician · Stanford, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Crystal Unzueta, MD is a Family Medicine Physician provider in Stanford, CA (NPI 1538574470).
Provider details
- NPI number
- 1538574470
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- A142631 (CA)
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
215 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 | 70 | $90 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 65 | $100 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 49 | $65 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 19 | $89 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 12 | $58 |
Typical Medicare-allowed amounts for these services range $58–$100 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, 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.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 81 | 31 |
| Gabapentin | 48 | 17 |
| Amlodipine Besylate | 41 | 16 |
| Levothyroxine Sodium | 41 | 12 |
| Lisinopril | 30 | 12 |
| Omeprazole | 30 | 11 |
| Losartan Potassium |
Practice location
Mailing address
Registry dates
- Enumerated
- 2014-06-30
- Last updated
- 2024-04-17
- Certified
- 2024-04-17
Frequently asked questions
- What is Crystal Unzueta's NPI number?
- Crystal Unzueta's National Provider Identifier (NPI) is 1538574470, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Crystal Unzueta's specialty?
- Crystal Unzueta is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Crystal Unzueta located?
- Crystal Unzueta's practice location on file with NPPES is 300 Pasteur Dr, Stanford, CA 94305-2200.
- What is Crystal Unzueta's phone number?
- The practice phone number listed in the NPPES registry for Crystal Unzueta is (650) 723-4000.
- Does Crystal Unzueta accept Medicare?
- Crystal Unzueta is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Crystal Unzueta's NPI active?
- Yes — Crystal Unzueta's NPI (1538574470) is active in the NPPES registry as of the last update on 2024-04-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.