What is John Mader's NPI number?

John Mader's National Provider Identifier (NPI) is 1982535019, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is John Mader's specialty?

John Mader is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).

Where is John Mader located?

John Mader's practice location on file with NPPES is 169 Ashley Ave, Charleston, SC 29425-8905.

What is John Mader's phone number?

The practice phone number listed in the NPPES registry for John Mader is (843) 876-1344.

Is John Mader's NPI active?

Yes — John Mader's NPI (1982535019) is active in the NPPES registry as of the last update on 2026-05-27.

IndividualActive

John Mader, MD

NPI 1982535019 · Family Medicine Physician · Charleston, SC

John Mader, MD is a Family Medicine Physician provider in Charleston, SC (NPI 1982535019).

Provider details

NPI number: 1982535019
Entity type: Individual
Primary specialty: Family Medicine PhysicianAllopathic & Osteopathic Physicians
Credential: MD
Sex: Male
Sole proprietor: Yes
License: LL96962 (SC)

Specialties & taxonomies

Family Medicine PhysicianPrimary207Q00000XLicense LL96962 (SC)
Allopathic & Osteopathic Physicians

Profile Score

Established profile(52/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure38% of score
Under 1 yr in 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

169 Ashley Ave

Charleston, SC 29425-8905

Phone: (843) 876-1344

Street-level locationGet directions

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Mailing address