Mark Nallaratnam, MD
NPI 1427216811 · Cardiovascular Disease Physician · Boston, MA
Mark Nallaratnam, MD is a Cardiovascular Disease Physician provider in Boston, MA (NPI 1427216811).
Provider details
- NPI number
- 1427216811
- Entity type
- Individual
- Primary specialty
- Cardiovascular Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 233791 (MA)
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
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
- 2008-06-02
- Last updated
- 2008-06-02
Frequently asked questions
- What is Mark Nallaratnam's NPI number?
- Mark Nallaratnam's National Provider Identifier (NPI) is 1427216811, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Nallaratnam's specialty?
- Mark Nallaratnam is listed in the NPPES registry with a primary specialty of Cardiovascular Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Nallaratnam located?
- Mark Nallaratnam's practice location on file with NPPES is 88 E Newton St, Boston, MA 02118-2308.
- What is Mark Nallaratnam's phone number?
- The practice phone number listed in the NPPES registry for Mark Nallaratnam is (617) 638-5795.
- Is Mark Nallaratnam's NPI active?
- Yes — Mark Nallaratnam's NPI (1427216811) is active in the NPPES registry as of the last update on 2008-06-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.