John Yung, M.D.
NPI 1871830828 · Internal Medicine Physician · Pasadena, CA
Enrolled with Medicare as Practitioner - Hospitalist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Yung, M.D. is a Internal Medicine Physician provider in Pasadena, CA (NPI 1871830828).
Provider details
- NPI number
- 1871830828
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- A123734 (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
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
12 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) |
|---|---|---|
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 12 | $134 |
Typical Medicare-allowed amounts for these services range $134–$134 (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 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Cefpodoxime Proxetil | 49 | 49 |
| Furosemide | 32 | 23 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 29 | 29 |
| Pantoprazole Sodium | 19 | 12 |
| Omeprazole | 15 | 12 |
| Bisoprolol Fumarate | 14 | — |
| Azithromycin | 13 | 13 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2013-01-10
- Last updated
- 2021-12-10
- Certified
- 2021-12-07
Frequently asked questions
- What is John Yung's NPI number?
- John Yung's National Provider Identifier (NPI) is 1871830828, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Yung's specialty?
- John Yung is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John Yung located?
- John Yung's practice location on file with NPPES is 100 W California Blvd, Pasadena, CA 91105-3010.
- What is John Yung's phone number?
- The practice phone number listed in the NPPES registry for John Yung is (626) 397-5711.
- Does John Yung accept Medicare?
- John Yung is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Yung's NPI active?
- Yes — John Yung's NPI (1871830828) is active in the NPPES registry as of the last update on 2021-12-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.