Chang Oh, M.D.
NPI 1477613941 · Family Medicine Physician · Temecula, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Chang Oh, M.D. is a Family Medicine Physician provider in Temecula, CA (NPI 1477613941).
Provider details
- NPI number
- 1477613941
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- A37083 (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
6,987 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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 1,661 | $98 |
| Application of Ultrasound, Each 15 Minutes97035 | 1,590 | $11 |
| Therapy Procedure Using Massage, Each 15 Minutes97124 | 1,589 | $33 |
| Therapy Procedure Using Exercise to Develop Strength, Endurance, Range of Motion, and Flexibility, Each 15 Minutes97110 | 1,588 | $24 |
| Infusion Into a Vein for Hydration, Each Additional Hour96361 | 345 | $14 |
| Infusion Into a Vein for Hydration, 31-60 Minutes96360 | 113 | $37 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 51 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Icosapent Ethylbrand: Vascepa | 81 | 25 |
| Amlodipine Besylate | 71 | 21 |
| Celecoxib | 63 | 16 |
| Losartan Potassium | 49 | 16 |
| Gabapentin | 49 | 14 |
| Rosuvastatin Calcium | 47 | 14 |
| Tamsulosin Hcl | 46 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$143 across 1 record (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
- 2006-12-12
- Last updated
- 2007-07-08
Frequently asked questions
- What is Chang Oh's NPI number?
- Chang Oh's National Provider Identifier (NPI) is 1477613941, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Chang Oh's specialty?
- Chang Oh is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Chang Oh located?
- Chang Oh's practice location on file with NPPES is 28991 Old Town Front St, Temecula, CA 92590-5803.
- What is Chang Oh's phone number?
- The practice phone number listed in the NPPES registry for Chang Oh is (951) 693-5001.
- Does Chang Oh accept Medicare?
- Chang Oh is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Chang Oh's NPI active?
- Yes — Chang Oh's NPI (1477613941) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.