Annie Chern, M.D.
NPI 1104051507 · Family Medicine Physician · San Jose, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Annie Chern, M.D. is a Family Medicine Physician provider in San Jose, CA (NPI 1104051507).
Provider details
- NPI number
- 1104051507
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- A107270 (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
17 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
265 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 | 75 | $155 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 47 | $88 |
| Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes99231 | 31 | $55 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 28 | $193 |
| Hospital Discharge Day Management, 30 Minutes Or Less99238 | 26 | $93 |
| 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'S |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 17 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 110 | 42 |
| Amlodipine Besylate | 55 | 23 |
| Metformin Hcl | 36 | — |
| Losartan Potassium | 34 | 14 |
| Levothyroxine Sodium | 21 | — |
| Semaglutidebrand: Ozempic | 20 | — |
| Lisinopril |
Practice location
Mailing address
Registry dates
- Enumerated
- 2009-05-29
- Last updated
- 2012-02-03
Frequently asked questions
- What is Annie Chern's NPI number?
- Annie Chern's National Provider Identifier (NPI) is 1104051507, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Annie Chern's specialty?
- Annie Chern is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Annie Chern located?
- Annie Chern's practice location on file with NPPES is 455 Oconnor Dr, San Jose, CA 95128-1633.
- What is Annie Chern's phone number?
- The practice phone number listed in the NPPES registry for Annie Chern is (408) 995-5453.
- Does Annie Chern accept Medicare?
- Annie Chern is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Annie Chern's NPI active?
- Yes — Annie Chern's NPI (1104051507) is active in the NPPES registry as of the last update on 2012-02-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.