Derek Susumu Moriyama
Hospice and Palliative Medicine (Internal Medicine) Physician · Tustin, CA
Derek Susumu Moriyama is a hospice and palliative medicine (internal medicine) physician with a practice address in Tustin, California, and NPI 1851747901, issued on May 8, 2016. Check the license (California A168883, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Derek Susumu Moriyama
- Primary taxonomy
- Hospice and Palliative Medicine (Internal Medicine) Physician 207RH0002X
- License number
- A168883 CA
Self-reported in NPPES; status is on the state search - Practice location
- 15000 Kensington Park Dr Ste 170, Tustin, CA 92782
- Phone
- (714) 477-8300
- Enumerated
- May 8, 2016
- Record last updated
- May 29, 2026
- Fax
- (714) 477-8301
- Medicare enrollment
- Enrolled (PECOS I20200827001458); accepts Medicare assignment
- Medical or professional school
- University Of California, Irvine, California College Of Medicine, 2016
- Entity
- Type 1 · individual
8 nearest hospice and palliative medicine (internal medicine) physician records → All 260 in California → Look up another NPI →
Verify Derek Susumu Moriyama in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A168883Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
24% fewer Medicare Part D claims than the average hospice and palliative medicine (internal medicine) physician in 2024
562 Medicare Part D claims for 115 beneficiaries, against an average of 741 among the 1,607 providers of this specialty who prescribed in Part D.
Most prescribed
- Levothyroxine Sodium97 claims
- Tamsulosin Hcl44 claims
- Amlodipine Besylate32 claims
- Finasteride25 claims
- Metoprolol Succinate24 claims
- Atorvastatin Calcium23 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
- Hmts IncTustin, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Derek Susumu Moriyama among 260 hospice and palliative medicine (internal medicine) physician records in California
Derek Susumu Moriyama is one of 260 hospice and palliative medicine (internal medicine) physician records with a practice address in California. 87% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 74% of them.
- NPI issued2016 · 74% of these records are older, 23% newer
- In a Medicare fileYes · 87% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated2016 · median 2010 among the 193 with a school on file
- Record last updated2026 · 38% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0002X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hospice and Palliative Medicine (Internal Medicine) Physician providers in California
There are 260 hospice and palliative medicine (internal medicine) physician records in California.
All 260 in California → Every provider in Tustin → Hospice and Palliative Medicine (Internal Medicine) Physician nationwide →
The 8 hospice and palliative medicine (internal medicine) physician records with the nearest ZIP codes
- Randall Morton, PARALEGALFountain Valley, CA 927081699439943
- Samantha Chen, M.D.Orange, CA 928681346669207
- Sunita Puri, M.D.Orange, CA 928681174849186
- Lucas Puttock, DOOrange, CA 928681194119008
- Melvyn Sterling, M.D.Orange, CA 928681245394196
- Cory Taylor, MDOrange, CA 928681033538525
- Nadin Faidi, MDMission Viejo, CA 926911831542158
- Brooke Nichols, M.D.Mission Viejo, CA 926911932406907
Common questions
What is Derek Susumu Moriyama's NPI number?
Derek Susumu Moriyama's National Provider Identifier (NPI) is 1851747901, issued on May 8, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Derek Susumu Moriyama located?
The NPPES record lists a practice address at 15000 Kensington Park Dr Ste 170, Tustin, CA, 92782. Phone: (714) 477-8300. Providers update this record themselves, so call before visiting.
How can I verify Derek Susumu Moriyama's license?
NPPES lists California license number A168883, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Derek Susumu Moriyama prescribe under Medicare Part D?
In 2024, Derek Susumu Moriyama had 562 Medicare Part D claims for 115 beneficiaries; the average among hospice and palliative medicine (internal medicine) physician prescribers was 741. 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.