Merrill Carolin, MD
NPI 1912014994 · Neurology Physician · San Antonio, TX
Enrolled with Medicare as Order and Referring Only - Neurology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Merrill Carolin, MD is a Neurology Physician provider in San Antonio, TX (NPI 1912014994).
Provider details
- NPI number
- 1912014994
- Entity type
- Individual
- Primary specialty
- Neurology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- H3396 (TX)
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
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
Registry dates
- Enumerated
- 2006-08-24
- Last updated
- 2007-07-13
Frequently asked questions
- What is Merrill Carolin's NPI number?
- Merrill Carolin's National Provider Identifier (NPI) is 1912014994, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Merrill Carolin's specialty?
- Merrill Carolin is listed in the NPPES registry with a primary specialty of Neurology Physician (Allopathic & Osteopathic Physicians).
- Where is Merrill Carolin located?
- Merrill Carolin's practice location on file with NPPES is 4647 Medical Dr, San Antonio, TX 78229-4403.
- What is Merrill Carolin's phone number?
- The practice phone number listed in the NPPES registry for Merrill Carolin is (210) 257-1400.
- Does Merrill Carolin accept Medicare?
- Merrill Carolin is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Merrill Carolin's NPI active?
- Yes — Merrill Carolin's NPI (1912014994) is active in the NPPES registry as of the last update on 2007-07-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.