Mark T. Grattan, MD, LLC
NPI 1043413040 · Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · Honolulu, HI
Mark T. Grattan, MD, LLC is a Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician organization in Honolulu, HI (NPI 1043413040).
Provider details
- NPI number
- 1043413040
- Entity type
- Organization
- Primary specialty
- Thoracic Surgery (Cardiothoracic Vascular Surgery) PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Mark Grattan, Sole Proprietor(808) 522-3068
- License
- MD 7469 (HI)
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
- 2007-06-07
- Last updated
- 2007-12-11
Frequently asked questions
- What is Mark T. Grattan, MD, LLC's NPI number?
- Mark T. Grattan, MD, LLC's National Provider Identifier (NPI) is 1043413040, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Mark T. Grattan, MD, LLC?
- Mark T. Grattan, MD, LLC is classified in the NPPES registry as Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician (Allopathic & Osteopathic Physicians).
- Where is Mark T. Grattan, MD, LLC located?
- Mark T. Grattan, MD, LLC's practice location on file with NPPES is 888 S King St, Honolulu, HI 96813-3009.
- What is Mark T. Grattan, MD, LLC's phone number?
- The practice phone number listed in the NPPES registry for Mark T. Grattan, MD, LLC is (808) 522-3068.
- Who is the authorized official for Mark T. Grattan, MD, LLC?
- The authorized official listed on Mark T. Grattan, MD, LLC's NPPES record is Mark Grattan, Sole Proprietor. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Mark T. Grattan, MD, LLC's NPI active?
- Yes — Mark T. Grattan, MD, LLC's NPI (1043413040) is active in the NPPES registry as of the last update on 2007-12-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.