Thomas Sidney Kosasa, MD
Obstetrics Physician · Honolulu, HI
Thomas Sidney Kosasa, MD is an obstetrics physician with a practice address in Honolulu, Hawaii, and NPI 1396777637, issued on Jul 7, 2006. Check the license (Hawaii MD2581, as entered in NPPES) on the Hawaii Medical Board; the Medicare figures below come from public CMS files.
- Name
- Thomas Sidney Kosasa
- Credential
- MD
- Primary taxonomy
- Obstetrics Physician 207VX0000X
- License number
- MD2581 HI
Self-reported in NPPES; status is on the state search - Practice location
- 1319 Punahou Street, Honolulu, HI 96826
- Phone
- (808) 949-2304
- Enumerated
- Jul 7, 2006
- Record last updated
- Oct 25, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (808) 951-7004
- Medicare enrollment
- Enrolled (PECOS I20051205000697); accepts Medicare assignment
- Entity
- Type 1 · individual
5 nearest obstetrics physician records → All 6 in Hawaii → Look up another NPI →
Also registered at 1319 Punahou Street
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Megan Blair, DOPediatrics Physician1598351611
- Alison Bright, RD, LDRegistered Dietitian1033876933
- David Easa, MDNeonatal-Perinatal Medicine Physician1568687267
- Steven Emura, M.D.Specialist1649356601
- Priya Gyani, MDPediatric Hospice and Palliative Medicine Physician1285954842
- Candyce Kaaiai, LCSWClinical Social Worker1154768703
Verify Thomas Sidney Kosasa in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersHawaii Medical Board
Search for license MD2581Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
83% more Medicare Part D claims than the average obstetrics physician in 2024
398 Medicare Part D claims for 103 beneficiaries, against an average of 218 among the 863 providers of this specialty who prescribed in Part D.
Most prescribed
- Raloxifene Hcl186 claims
- Risedronate Sodium65 claims
- Alendronate Sodium46 claims
- Estradiol-Norethindrone Acetat19 claims
- Acyclovir11 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.
Industry payments in 2024: $21.41
3 payments; by number, the most common kind was food and beverage; the largest payer was Organon Llc. The 679 providers of this specialty with any payment received $826.19 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Obstetrics Physician providers in Hawaii
There are 6 obstetrics physician records in Hawaii.
All 6 in Hawaii → Every provider in Honolulu → Obstetrics Physician nationwide →
The 5 obstetrics physician records with the nearest ZIP codes
- Cheryl Cusick, CNM, APRN, IBCLCHonolulu, HI 968261508326018
- La-Tisha Frazier, MDHonolulu, HI 968261417006081
- Lynnae Sauvage, MDHonolulu, HI 968261437133345
- Redentor Rojales, M.D.Honolulu, HI 968191417969627
- Heidi Purcell, MDWaimea, HI 967961275888513
Common questions
What is Thomas Sidney Kosasa, MD's NPI number?
Thomas Sidney Kosasa, MD's National Provider Identifier (NPI) is 1396777637, issued on Jul 7, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Thomas Sidney Kosasa, MD located?
The NPPES record lists a practice address at 1319 Punahou Street, Honolulu, HI, 96826. Phone: (808) 949-2304. Providers update this record themselves, so call before visiting.
How can I verify Thomas Sidney Kosasa, MD's license?
NPPES lists Hawaii license number MD2581, 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 Thomas Sidney Kosasa, MD prescribe under Medicare Part D?
In 2024, Thomas Sidney Kosasa, MD had 398 Medicare Part D claims for 103 beneficiaries; the average among obstetrics physician prescribers was 218. Part D covers Medicare prescriptions only.
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.