Tiarnan Keenan
NPI 1801618186 · Retina Specialist (Ophthalmology) Physician · Bethesda, MD
Enrolled with Medicare as Order and Referring Only - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Tiarnan Keenan is a Retina Specialist (Ophthalmology) Physician provider in Bethesda, MD (NPI 1801618186).
Provider details
- NPI number
- 1801618186
- Entity type
- Individual
- Primary specialty
- Retina Specialist (Ophthalmology) PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- No
- License
- MD22678 (ME)
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
1 yr 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
- 2024-10-29
- Last updated
- 2024-10-29
- Certified
- 2024-10-22
Frequently asked questions
- What is Tiarnan Keenan's NPI number?
- Tiarnan Keenan's National Provider Identifier (NPI) is 1801618186, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Tiarnan Keenan's specialty?
- Tiarnan Keenan is listed in the NPPES registry with a primary specialty of Retina Specialist (Ophthalmology) Physician (Allopathic & Osteopathic Physicians).
- Where is Tiarnan Keenan located?
- Tiarnan Keenan's practice location on file with NPPES is 9000 Rockville Pike, Bethesda, MD 20892.
- What is Tiarnan Keenan's phone number?
- The practice phone number listed in the NPPES registry for Tiarnan Keenan is (301) 451-6330.
- Does Tiarnan Keenan accept Medicare?
- Tiarnan Keenan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Tiarnan Keenan's NPI active?
- Yes — Tiarnan Keenan's NPI (1801618186) is active in the NPPES registry as of the last update on 2024-10-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.