Allan Chan, MD
NPI 1699235259 · Family Medicine Physician · Orange, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Allan Chan, MD is a Family Medicine Physician provider in Orange, CA (NPI 1699235259).
Provider details
- NPI number
- 1699235259
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A182035 (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
7 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
379 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 | 138 | $139 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 71 | $99 |
| Amplifed Dna Or Rna Probe Detection of Severe Acute Respiratory Syndrome Coronavirus 2 (covid-19) Antigen87635 | 38 | $50 |
| Detection Test By Immunoassay With Direct Visual Observation for Influenza Virus87804 | 34 | $16 |
| Urinalysis, Manual Test81002 | 29 | $3 |
| X-Ray of Chest, 2 Views71046 | 23 |
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 |
|---|---|---|
| Fluticasone Propionate | 98 | 82 |
| Sulfamethoxazole/Trimethoprimbrand: Sulfamethoxazole-Trimethoprim | 62 | 61 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 52 | 51 |
| Azithromycin | 49 | 48 |
| Nirmatrelvir/Ritonavirbrand: Paxlovid | 25 | 25 |
| Triamcinolone Acetonide | 24 | 24 |
| Albuterol Sulfate |
Practice location
Mailing address
Registry dates
- Enumerated
- 2019-03-20
- Last updated
- 2023-03-14
- Certified
- 2023-03-14
Frequently asked questions
- What is Allan Chan's NPI number?
- Allan Chan's National Provider Identifier (NPI) is 1699235259, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Allan Chan's specialty?
- Allan Chan is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Allan Chan located?
- Allan Chan's practice location on file with NPPES is 2501 E Chapman Ave Ste 101, Orange, CA 92869-3204.
- What is Allan Chan's phone number?
- The practice phone number listed in the NPPES registry for Allan Chan is (714) 628-3300.
- Does Allan Chan accept Medicare?
- Allan Chan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Allan Chan's NPI active?
- Yes — Allan Chan's NPI (1699235259) is active in the NPPES registry as of the last update on 2023-03-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.