Base of the Bays Dermatology PC
NPI 1538263231 · Pediatric Dermatology Physician · Williamsburg, MI
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Base of the Bays Dermatology PC is a Pediatric Dermatology Physician organization in Williamsburg, MI (NPI 1538263231).
Provider details
- NPI number
- 1538263231
- Entity type
- Organization
- Primary specialty
- Pediatric Dermatology PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Mark Saunders, President(231) 938-3112
- License
- MS051504 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
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
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
Other names (DBA / former)
- Doing business as
- M.D. Saunders, M.D., P.C.
Registry dates
- Enumerated
- 2006-09-12
- Last updated
- 2025-09-11
Frequently asked questions
- What is Base of the Bays Dermatology PC's NPI number?
- Base of the Bays Dermatology PC's National Provider Identifier (NPI) is 1538263231, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Base of the Bays Dermatology PC?
- Base of the Bays Dermatology PC is classified in the NPPES registry as Pediatric Dermatology Physician (Allopathic & Osteopathic Physicians).
- Where is Base of the Bays Dermatology PC located?
- Base of the Bays Dermatology PC's practice location on file with NPPES is 3950 Shore Rd, Williamsburg, MI 49690.
- What is Base of the Bays Dermatology PC's phone number?
- The practice phone number listed in the NPPES registry for Base of the Bays Dermatology PC is (231) 938-7004.
- Does Base of the Bays Dermatology PC accept Medicare?
- Base of the Bays Dermatology PC is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Base of the Bays Dermatology PC?
- The authorized official listed on Base of the Bays Dermatology PC's NPPES record is Mark Saunders, President. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Base of the Bays Dermatology PC's NPI active?
- Yes — Base of the Bays Dermatology PC's NPI (1538263231) is active in the NPPES registry as of the last update on 2025-09-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.