Mark Schlauderaff, M.D.
NPI 1487651667 · Internal Medicine Physician · Shelton, WA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Schlauderaff, M.D. is a Internal Medicine Physician provider in Shelton, WA (NPI 1487651667).
Provider details
- NPI number
- 1487651667
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- MD00019248 (WA)
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
20 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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 21 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 66 | 41 |
| Amlodipine Besylate | 38 | 19 |
| Tamsulosin Hcl | 37 | 17 |
| Losartan Potassium | 32 | 22 |
| Lisinopril | 31 | 20 |
| Levothyroxine Sodium | 30 | 22 |
| Gabapentin |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-07-05
- Last updated
- 2017-04-03
Frequently asked questions
- What is Mark Schlauderaff's NPI number?
- Mark Schlauderaff's National Provider Identifier (NPI) is 1487651667, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Schlauderaff's specialty?
- Mark Schlauderaff is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Schlauderaff located?
- Mark Schlauderaff's practice location on file with NPPES is 237 Professional Way, Shelton, WA 98584-4404.
- What is Mark Schlauderaff's phone number?
- The practice phone number listed in the NPPES registry for Mark Schlauderaff is (360) 426-2500.
- Does Mark Schlauderaff accept Medicare?
- Mark Schlauderaff is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Schlauderaff's NPI active?
- Yes — Mark Schlauderaff's NPI (1487651667) is active in the NPPES registry as of the last update on 2017-04-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.