Merril Stock, MD
NPI 1659649903 · Specialist · Potomac, MD
Enrolled with Medicare as Order and Referring Only - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Merril Stock, MD is a Specialist provider in Potomac, MD (NPI 1659649903).
Provider details
- NPI number
- 1659649903
- Entity type
- Individual
- Primary specialty
- SpecialistOther Service Providers
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 0101240605 (VA)
Specialties & taxonomies
Other Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
14 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
- 2011-12-01
- Last updated
- 2011-12-01
Frequently asked questions
- What is Merril Stock's NPI number?
- Merril Stock's National Provider Identifier (NPI) is 1659649903, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Merril Stock's specialty?
- Merril Stock is listed in the NPPES registry with a primary specialty of Specialist (Other Service Providers).
- Where is Merril Stock located?
- Merril Stock's practice location on file with NPPES is 11018 Rock Run Dr, Potomac, MD 20854-1752.
- What is Merril Stock's phone number?
- The practice phone number listed in the NPPES registry for Merril Stock is (301) 943-8049.
- Does Merril Stock accept Medicare?
- Merril Stock is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Merril Stock's NPI active?
- Yes — Merril Stock's NPI (1659649903) is active in the NPPES registry as of the last update on 2011-12-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.