Mark Walker, M.D.
NPI 1538196662 · Internal Medicine Physician · Gallipolis, OH
Mark Walker, M.D. is a Internal Medicine Physician provider in Gallipolis, OH (NPI 1538196662).
Provider details
- NPI number
- 1538196662
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 35-04-7305 (OH)
Specialties & taxonomies
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
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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-06-26
- Last updated
- 2011-03-05
Frequently asked questions
- What is Mark Walker's NPI number?
- Mark Walker's National Provider Identifier (NPI) is 1538196662, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Walker's specialty?
- Mark Walker is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Walker located?
- Mark Walker's practice location on file with NPPES is 90 Jackson Pike, Gallipolis, OH 45631-1560.
- What is Mark Walker's phone number?
- The practice phone number listed in the NPPES registry for Mark Walker is (740) 446-5131.
- Is Mark Walker's NPI active?
- Yes — Mark Walker's NPI (1538196662) is active in the NPPES registry as of the last update on 2011-03-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.