Mark Nicholas Flanagan, DO
Emergency Medicine Physician · Honolulu, HI
Mark Nicholas Flanagan, DO is an emergency medicine physician with a practice address in Honolulu, Hawaii, and NPI 1679559132, issued on Dec 16, 2005. Check the license (Hawaii DOS-2253, as entered in NPPES) on the Hawaii Medical Board; the Medicare figures below come from public CMS files.
- Name
- Mark Nicholas Flanagan
- Credential
- DO
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- DOS-2253 HI
Self-reported in NPPES; status is on the state search - Practice location
- 888 S King St, Honolulu, HI 96813
- Phone
- (808) 522-4000
- Enumerated
- Dec 16, 2005
- Record last updated
- Jan 6, 2025
- Fax
- (808) 522-4062
- Medicare enrollment
- Enrolled (PECOS I20230126001269); accepts Medicare assignment
- Medical or professional school
- Nova Southeastern College Of Osteo Medicine, 2003
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 370 in Hawaii → Look up another NPI →
Also registered at 888 S King St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Whitney Reigh Asao, OTD, OTR/LOccupational Therapist1568082766
Verify Mark Nicholas Flanagan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersHawaii Medical Board
Search for license DOS-2253Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
20% more Medicare Part D claims than the average emergency medicine physician in 2024
271 Medicare Part D claims for 183 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 7% of claims. 24 claims were for opioids.
Most prescribed
- Ondansetron Odt32 claims
- Cephalexin31 claims
- Doxycycline Hyclate20 claims
- Oxycodone Hcl20 claims
- Prednisone19 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 86.2 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
One hospital affiliation
- Straub Clinic And HospitalHonolulu, HI · Acute Care Hospitals4 of 5 stars
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Mark Nicholas Flanagan among 370 emergency medicine physician records in Hawaii
Mark Nicholas Flanagan, DO is one of 370 emergency medicine physician records with a practice address in Hawaii. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 97% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 55% of these records are
- Graduated2003 · median 2012 among the 202 with a school on file
- Record last updated2025 · 56% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Hawaii practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
161 emergency medicine physician records list a practice address in Honolulu
They are 161 of the 12,408 NPPES records with a practice address in Honolulu, and 370 emergency medicine physician records in Hawaii.
All 370 in Hawaii → Every provider in Honolulu → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Vijak Ayasanonda, M.D.Honolulu, HI 968131346285582
- Monte Elias, M.D.Honolulu, HI 968131821024985
- Lily Gallagher, M.D.Honolulu, HI 968131538198916
- Ramsey Hasan, MDHonolulu, HI 968131184662256
- Matt Ing, M.D.Honolulu, HI 968131295770881
- Eric Klemmer, M.D.Honolulu, HI 968131346276052
- Dale Oda, M.D.Honolulu, HI 968131831126556
- Catherine Oliver, M.D.Honolulu, HI 968131669400982
Common questions
What is Mark Nicholas Flanagan, DO's NPI number?
Mark Nicholas Flanagan, DO's National Provider Identifier (NPI) is 1679559132, issued on Dec 16, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Mark Nicholas Flanagan, DO located?
The NPPES record lists a practice address at 888 S King St, Honolulu, HI, 96813. Phone: (808) 522-4000. Providers update this record themselves, so call before visiting.
How can I verify Mark Nicholas Flanagan, DO's license?
NPPES lists Hawaii license number DOS-2253, as entered by the provider. Search the Hawaii Medical Board at https://cca.hawaii.gov/pvl/boards/medical/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mark Nicholas Flanagan, DO prescribe under Medicare Part D?
In 2024, Mark Nicholas Flanagan, DO had 271 Medicare Part D claims for 183 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Mark Nicholas Flanagan, DO's MIPS final score?
The 2023 MIPS final score is 86.2 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.