Mark Chan, MD
NPI 1689779530 · Specialist · Clackamas, OR
Enrolled with Medicare as Practitioner - Allergy/Immunology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Chan, MD is a Specialist provider in Clackamas, OR (NPI 1689779530).
Provider details
- NPI number
- 1689779530
- Entity type
- Individual
- Primary specialty
- SpecialistOther Service Providers
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
Specialties & taxonomies
Other Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
83% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 10 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Azelastine Hcl | 87 | 42 |
| Montelukast Sodium | 79 | 30 |
| Ipratropium Bromide | 63 | 35 |
| Budesonide/Formoterol Fumaratebrand: Breyna | 46 | 15 |
| Tiotropium Bromidebrand: Spiriva Respimat | 43 | 21 |
| Ciclesonidebrand: Alvesco | 42 | 26 |
| Fluticasone Propion/Salmeterolbrand: Wixela Inhub | 35 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-09-14
- Last updated
- 2007-07-08
Frequently asked questions
- What is Mark Chan's NPI number?
- Mark Chan's National Provider Identifier (NPI) is 1689779530, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Chan's specialty?
- Mark Chan is listed in the NPPES registry with a primary specialty of Specialist (Other Service Providers).
- Where is Mark Chan located?
- Mark Chan's practice location on file with NPPES is 10180 Se Sunnyside Rd, Clackamas, OR 97015-8970.
- What is Mark Chan's phone number?
- The practice phone number listed in the NPPES registry for Mark Chan is (503) 571-2724.
- Does Mark Chan accept Medicare?
- Mark Chan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Chan's NPI active?
- Yes — Mark Chan's NPI (1689779530) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.