Anthony Chan, M.D.
NPI 1285070235 · Surgery Physician · Castro Valley, CA
Enrolled with Medicare as Practitioner - General Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Anthony Chan, M.D. is a Surgery Physician provider in Castro Valley, CA (NPI 1285070235).
Provider details
- NPI number
- 1285070235
- Entity type
- Individual
- Primary specialty
- Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
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
83% of core fields populated
- Practice footprint17% of score
4 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
172 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 | 44 | $145 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 44 | $88 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 33 | $110 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 20 | $198 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 17 | $132 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More |
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) | Beneficiaries |
|---|---|---|
| Oxycodone Hcl | 11 | 11 |
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
Mailing address
Additional practice locations (3)
- 20400 Lake Chabot Rd Ste 102Castro Valley, CA 94546Phone: (510) 247-9227Fax: (510) 247-9241
- 350 30th St Ste 411Oakland, CA 94609-3425Phone: (510) 204-8168Fax: (510) 506-7725
- 13851 E 14th St Ste 308San Leandro, CA 94578-2630Phone: (510) 483-2555Fax: (510) 483-1856
Registry dates
- Enumerated
- 2013-05-17
- Last updated
- 2022-03-09
- Certified
- 2022-03-09
Frequently asked questions
- What is Anthony Chan's NPI number?
- Anthony Chan's National Provider Identifier (NPI) is 1285070235, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Anthony Chan's specialty?
- Anthony Chan is listed in the NPPES registry with a primary specialty of Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Anthony Chan located?
- Anthony Chan's practice location on file with NPPES is 20101 Lake Chabot Rd, Castro Valley, CA 94546-5305.
- What is Anthony Chan's phone number?
- The practice phone number listed in the NPPES registry for Anthony Chan is (510) 204-8168.
- Does Anthony Chan accept Medicare?
- Anthony Chan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Anthony Chan's NPI active?
- Yes — Anthony Chan's NPI (1285070235) is active in the NPPES registry as of the last update on 2022-03-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.