Pierce Claassen, MD
NPI 1699535104 · Internal Medicine Physician · Scottsdale, AZ
Enrolled with Medicare as Order and Referring Only - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Pierce Claassen, MD is a Internal Medicine Physician provider in Scottsdale, AZ (NPI 1699535104).
Provider details
- NPI number
- 1699535104
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- R80860 (AZ)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
2 yrs in NPPES registry
- Profile completeness38% of score
100% 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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2024-03-21
- Last updated
- 2024-05-16
- Certified
- 2024-05-16
Frequently asked questions
- What is Pierce Claassen's NPI number?
- Pierce Claassen's National Provider Identifier (NPI) is 1699535104, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Pierce Claassen's specialty?
- Pierce Claassen is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Pierce Claassen located?
- Pierce Claassen's practice location on file with NPPES is 13400 E Shea Blvd, Scottsdale, AZ 85259-5499.
- What is Pierce Claassen's phone number?
- The practice phone number listed in the NPPES registry for Pierce Claassen is (480) 301-8000.
- Does Pierce Claassen accept Medicare?
- Pierce Claassen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Pierce Claassen's NPI active?
- Yes — Pierce Claassen's NPI (1699535104) is active in the NPPES registry as of the last update on 2024-05-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.