John Wang, M.D.
NPI 1720048291 · Internal Medicine Physician · Fountain Valley, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Wang, M.D. is a Internal Medicine Physician provider in Fountain Valley, CA (NPI 1720048291).
Provider details
- NPI number
- 1720048291
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A73379 (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
20 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
596 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 | 168 | $116 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 144 | $6 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 107 | $135 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 90 | $87 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 23 | $16 |
| Administration of Influenza Virus VaccineG0008 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 122 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 401 | 141 |
| Amlodipine Besylate | 217 | 93 |
| Losartan Potassium | 211 | 83 |
| Rosuvastatin Calcium | 171 | 64 |
| Metformin Hcl | 161 | 61 |
| Levothyroxine Sodium | 148 | 60 |
| Meloxicam |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-03-27
- Last updated
- 2021-12-28
- Certified
- 2021-12-28
Frequently asked questions
- What is John Wang's NPI number?
- John Wang's National Provider Identifier (NPI) is 1720048291, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Wang's specialty?
- John Wang is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John Wang located?
- John Wang's practice location on file with NPPES is 18035 Brookhurst St., Ste. 2100, Fountain Valley, CA 92708.
- What is John Wang's phone number?
- The practice phone number listed in the NPPES registry for John Wang is (657) 241-9090.
- Does John Wang accept Medicare?
- John Wang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Wang's NPI active?
- Yes — John Wang's NPI (1720048291) is active in the NPPES registry as of the last update on 2021-12-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.