What is Gene Chung's NPI number?

Gene Chung's National Provider Identifier (NPI) is 1467659771, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Gene Chung's specialty?

Gene Chung is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).

Where is Gene Chung located?

Gene Chung's practice location on file with NPPES is 300 Pasteur Dr, Stanford, CA 94305-2200.

What is Gene Chung's phone number?

The practice phone number listed in the NPPES registry for Gene Chung is (650) 723-4000.

Does Gene Chung accept Medicare?

Gene Chung is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.

Is Gene Chung's NPI active?

Yes — Gene Chung's NPI (1467659771) is active in the NPPES registry as of the last update on 2024-04-18.

IndividualActiveAccepts Medicare

Gene Chung, MD

NPI 1467659771 · Internal Medicine Physician · Stanford, CA

Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)

Gene Chung, MD is a Internal Medicine Physician provider in Stanford, CA (NPI 1467659771).

Provider details

NPI number: 1467659771
Entity type: Individual
Primary specialty: Internal Medicine PhysicianAllopathic & Osteopathic Physicians
Credential: MD
Sex: Male
Sole proprietor: No
License: C171960 (CA)

Specialties & taxonomies

Internal Medicine PhysicianPrimary207R00000XLicense C171960 (CA)
Allopathic & Osteopathic Physicians
Internal Medicine Physician207R00000XLicense 125053543 (IL)
Allopathic & Osteopathic Physicians

Profile Score

Detailed profile(76/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure28% of score
18 yrs in NPPES registry
Profile completeness28% of score
100% of core fields populated
Practice footprint17% of score
2 documented practice locations
Medicare service volume (vs. specialty peers)28% of score
780 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)
Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232	409	$88
Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222	125	$145
Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233	115	$132
Hospital Discharge Day Management, More Than 30 Minutes99239	56	$129
Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223	39	$194
Hospital Discharge Day Management, 30 Minutes Or Less99238	36

What this provider prescribes (Medicare Part D)

Top drugs by Medicare Part D claim volume, 2024 · 1 distinct drug on file.

Drug	Part D claims (2024)
Omeprazole	16

Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.

Practice location

300 Pasteur Dr

Stanford, CA 94305-2200

Phone: (650) 723-4000

Approximate (ZIP-level) locationGet directions

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Mailing address