Nancy Chang, DO
NPI 1710241559 · Family Medicine Physician · Oceanside, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nancy Chang, DO is a Family Medicine Physician provider in Oceanside, CA (NPI 1710241559).
Provider details
- NPI number
- 1710241559
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Female
- Sole proprietor
- No
- License
- DO182981 (OR)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
13 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
838 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) |
|---|---|---|
| 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 | 251 | $16 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 246 | $86 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 100 | $56 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 50 | $76 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 39 | $112 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 79 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 346 | 119 |
| Levothyroxine Sodium | 153 | 49 |
| Losartan Potassium | 149 | 55 |
| Lisinopril | 137 | 52 |
| Amlodipine Besylate | 128 | 47 |
| Hydrochlorothiazide | 109 | 43 |
| Sertraline Hcl |
Practice location
Mailing address
Registry dates
- Enumerated
- 2012-06-26
- Last updated
- 2026-02-11
- Certified
- 2026-02-11
Frequently asked questions
- What is Nancy Chang's NPI number?
- Nancy Chang's National Provider Identifier (NPI) is 1710241559, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nancy Chang's specialty?
- Nancy Chang is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Nancy Chang located?
- Nancy Chang's practice location on file with NPPES is 4318 Mission Ave, Oceanside, CA 92057-6541.
- What is Nancy Chang's phone number?
- The practice phone number listed in the NPPES registry for Nancy Chang is (760) 901-5010.
- Does Nancy Chang accept Medicare?
- Nancy Chang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nancy Chang's NPI active?
- Yes — Nancy Chang's NPI (1710241559) is active in the NPPES registry as of the last update on 2026-02-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.