Joan Sy, D.O.
NPI 1881710440 · Family Medicine Physician · Laguna Hills, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Joan Sy, D.O. is a Family Medicine Physician provider in Laguna Hills, CA (NPI 1881710440).
Provider details
- NPI number
- 1881710440
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Female
- Sole proprietor
- No
- License
- 20A6587 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,050 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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 High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 445 | $194 |
| Osteopathic Manipulative Treatment, 9-10 Body Regions98929 | 289 | $90 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 128 | $138 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 55 | $99 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 50 | $140 |
| Colorectal Cancer Screening; Fecal Occult Blood Test, Immunoassay, 1-3 SimultaneousG0328 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 29 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Rosuvastatin Calcium | 123 | 37 |
| Levothyroxine Sodium | 73 | 19 |
| Pravastatin Sodium | 45 | 13 |
| Dapagliflozin Propanediolbrand: Farxiga | 45 | — |
| Ezetimibe | 40 | 12 |
| Losartan Potassium | 35 | 11 |
| Liothyronine Sodium | 34 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$380 across 14 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-03-22
- Last updated
- 2022-10-10
- Certified
- 2022-10-10
Frequently asked questions
- What is Joan Sy's NPI number?
- Joan Sy's National Provider Identifier (NPI) is 1881710440, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joan Sy's specialty?
- Joan Sy is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Joan Sy located?
- Joan Sy's practice location on file with NPPES is 24953 Paseo De Valencia, Laguna Hills, CA 92653-4342.
- What is Joan Sy's phone number?
- The practice phone number listed in the NPPES registry for Joan Sy is (949) 460-9200.
- Does Joan Sy accept Medicare?
- Joan Sy is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Joan Sy's NPI active?
- Yes — Joan Sy's NPI (1881710440) is active in the NPPES registry as of the last update on 2022-10-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.