NPPES file of Aug 9, 2026

Gregory A. Pollack, M.D.

Hematology & Oncology Physician · Wailuku, HI

Gregory A. Pollack, M.D. is a hematology & oncology physician with a practice address in Wailuku, Hawaii, and NPI 1346428158, issued on Feb 4, 2008. Check the license (Hawaii MD-20238, as entered in NPPES) on the Hawaii Medical Board; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1346428158
Name
Gregory A. Pollack
Credential
M.D.
Primary taxonomy
Hematology & Oncology Physician 207RH0003X
License numbers
MD-20238 HI
2009-00799 NC
200900799 NC
Self-reported in NPPES; status is on the state search
Practice location
80 Mahalani St, Wailuku, HI 96793
Phone
(808) 243-6000
Enumerated
Feb 4, 2008
Record last updated
May 10, 2021 (not updated in 5 years: call before relying on the address or phone)
Medicaid ID
5912869 NC
Medicare enrollment
Enrolled (PECOS I20190709003146); accepts Medicare assignment
Medical or professional school
University Of Florida College Of Medicine, 2002
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest hematology & oncology physician records → All 49 in Hawaii → Look up another NPI →

Also registered at 80 Mahalani St

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Stephen Bangle, MDInternal Medicine Physician1043304595
  2. Andrew Barlow, MDObstetrics & Gynecology Physician1427460013
  3. Mehtap Berkmen, MDEndocrinology, Diabetes & Metabolism Physician1467481150
  4. Barbara Bezdicek, MDObstetrics & Gynecology Physician1003951906
  5. Cassandra Bick JohnsonRegistered Dietitian1033516687
  6. Rebecca Bicker, MDObstetrics & Gynecology Physician1679626253

Verify Gregory A. Pollack in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersHawaii Medical Board
    Search for license MD-20238    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Hawaii license search

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38% more Medicare Part D claims than the average hematology & oncology physician in 2024

1,208 Medicare Part D claims for 192 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 24% of claims. 45 claims were for opioids.

  1. Gregory Pollack1,208
  2. Specialty average877

Most prescribed

  1. Prednisone87 claims
  2. Abiraterone Acetate79 claims
  3. Letrozole74 claims
  4. Imatinib Mesylate67 claims
  5. Hydroxyurea65 claims
  6. Dexamethasone63 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.

Bills Medicare through one group practice

  1. Hawaii Permanente Medical Group IncWailuku, HI

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Gregory A. Pollack among 49 hematology & oncology physician records in Hawaii

Gregory A. Pollack, M.D. is one of 49 hematology & oncology physician records with a practice address in Hawaii. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 69% of them.

  • NPI issued2008 · 69% of these records are older, 27% newer
  • In a Medicare fileYes · 84% of these records are
  • In the CMS Doctors and Clinicians fileYes · 69% of these records are
  • Graduated2002 · median 2000 among the 34 with a school on file
  • Record last updated2021 · 53% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0003X and a Hawaii practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Hematology & Oncology Physician providers in Hawaii

There are 49 hematology & oncology physician records in Hawaii.

All 49 in Hawaii → Every provider in Wailuku → Hematology & Oncology Physician nationwide →

The 8 hematology & oncology physician records with the nearest ZIP codes

  1. William Adler, M.D.Wailuku, HI 967931710918610
  2. Devena Alston-Johnson, MDWailuku, HI 967931891732616
  3. Ramin Altaha, MDWailuku, HI 967931083649982
  4. Thomas Deleon, M.D.Wailuku, HI 967931245526623
  5. Larry Ebbert, MDWailuku, HI 967931518058163
  6. Judy Schmidt, M.D.Wailuku, HI 967931679578827
  7. Dhiraj Yadav, M.D.Wailuku, HI 967931104267608
  8. Kenneth Herbst, M.D.Waianae, HI 967921497783351

Common questions

What is Gregory A. Pollack, M.D.'s NPI number?

Gregory A. Pollack, M.D.'s National Provider Identifier (NPI) is 1346428158, issued on Feb 4, 2008. An NPI identifies a provider in billing; it is not a license.

Where is Gregory A. Pollack, M.D. located?

The NPPES record lists a practice address at 80 Mahalani St, Wailuku, HI, 96793. Phone: (808) 243-6000. Providers update this record themselves, so call before visiting.

How can I verify Gregory A. Pollack, M.D.'s license?

NPPES lists Hawaii license number MD-20238, 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 Gregory A. Pollack, M.D. prescribe under Medicare Part D?

In 2024, Gregory A. Pollack, M.D. had 1,208 Medicare Part D claims for 192 beneficiaries; the average among hematology & oncology physician prescribers was 877. 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.