Leah Phan, D.O.
NPI 1104288562 · Family Medicine Physician · Fountain Valley, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Leah Phan, D.O. is a Family Medicine Physician provider in Fountain Valley, CA (NPI 1104288562).
Provider details
- NPI number
- 1104288562
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Female
- Sole proprietor
- No
- License
- 20A15916 (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
10 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
145 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 | 44 | $103 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 38 | $6 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 29 | $93 |
| 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 | 23 | $17 |
| Administration of Influenza Virus VaccineG0008 | 11 | $35 |
Typical Medicare-allowed amounts for these services range $6–$103 (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 · 42 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 206 | 74 |
| Losartan Potassium | 127 | 46 |
| Levothyroxine Sodium | 121 | 35 |
| Amlodipine Besylate | 95 | 35 |
| Metformin Hcl | 68 | 24 |
| Simvastatin | 62 | 19 |
| Hydrochlorothiazide | 62 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2016-03-24
- Last updated
- 2026-02-26
- Certified
- 2026-02-26
Frequently asked questions
- What is Leah Phan's NPI number?
- Leah Phan's National Provider Identifier (NPI) is 1104288562, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Leah Phan's specialty?
- Leah Phan is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Leah Phan located?
- Leah Phan's practice location on file with NPPES is 16333 Harbor Blvd., Fountain Valley, CA 92708.
- What is Leah Phan's phone number?
- The practice phone number listed in the NPPES registry for Leah Phan is (714) 549-1300.
- Does Leah Phan accept Medicare?
- Leah Phan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Leah Phan's NPI active?
- Yes — Leah Phan's NPI (1104288562) is active in the NPPES registry as of the last update on 2026-02-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.