Sy Oang, D.O.
NPI 1972692937 · Internal Medicine Physician · Whittier, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sy Oang, D.O. is a Internal Medicine Physician provider in Whittier, CA (NPI 1972692937).
Provider details
- NPI number
- 1972692937
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- No
- License
- 20A6673 (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
19 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
490 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 | 323 | $138 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 95 | $92 |
| Administration of Influenza Virus VaccineG0008 | 36 | $35 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 20 | $141 |
| Hemoglobin A1c Level83036 | 16 | $10 |
Typical Medicare-allowed amounts for these services range $10–$141 (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 · 133 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 509 | 165 |
| Amlodipine Besylate | 406 | 118 |
| Rosuvastatin Calcium | 403 | 120 |
| Levothyroxine Sodium | 363 | 101 |
| Losartan Potassium | 299 | 88 |
| Simvastatin | 253 | 71 |
| Metoprolol Tartrate |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-10-11
- Last updated
- 2008-03-13
Frequently asked questions
- What is Sy Oang's NPI number?
- Sy Oang's National Provider Identifier (NPI) is 1972692937, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sy Oang's specialty?
- Sy Oang is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Sy Oang located?
- Sy Oang's practice location on file with NPPES is 15725 E Whittier Blvd, Whittier, CA 90603-2347.
- What is Sy Oang's phone number?
- The practice phone number listed in the NPPES registry for Sy Oang is (562) 947-8478.
- Does Sy Oang accept Medicare?
- Sy Oang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Sy Oang's NPI active?
- Yes — Sy Oang's NPI (1972692937) is active in the NPPES registry as of the last update on 2008-03-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.