Thomas Holohan, M.D.
NPI 1235311663 · Internal Medicine Physician · Rockville, MD
Thomas Holohan, M.D. is a Internal Medicine Physician provider in Rockville, MD (NPI 1235311663).
Provider details
- NPI number
- 1235311663
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- D0022282 (MD)
Specialties & taxonomies
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
18 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
- 2007-11-27
- Last updated
- 2007-11-27
Frequently asked questions
- What is Thomas Holohan's NPI number?
- Thomas Holohan's National Provider Identifier (NPI) is 1235311663, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Thomas Holohan's specialty?
- Thomas Holohan is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Thomas Holohan located?
- Thomas Holohan's practice location on file with NPPES is 15015 Rosecroft Rd, Rockville, MD 20853-1860.
- What is Thomas Holohan's phone number?
- The practice phone number listed in the NPPES registry for Thomas Holohan is (301) 929-3353.
- Is Thomas Holohan's NPI active?
- Yes — Thomas Holohan's NPI (1235311663) is active in the NPPES registry as of the last update on 2007-11-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.