Sonia Okuyama Sasaki, MD
Hematology & Oncology Physician · Denver, CO
Sonia Okuyama Sasaki, MD is a hematology & oncology physician with a practice address in Denver, Colorado, and NPI 1053520049, issued on May 22, 2007. Check the license (Colorado 49898, as entered in NPPES) on the Colorado Medical Board; the Medicare figures below come from public CMS files.
- Name
- Sonia Okuyama Sasaki
- Credential
- MD
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- 49898 CO
Self-reported in NPPES; status is on the state search - Practice location
- 700 Delaware St, Denver, CO 80204
- Phone
- (303) 602-6062
- Enumerated
- May 22, 2007
- Record last updated
- Mar 6, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20110914000577); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 212 in Colorado → Look up another NPI →
Also registered at 700 Delaware St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Raynette AdkinsPharmacist1346239936
- Lindsey AndreoliAdult Health Nurse Practitioner1821498023
- Julie Arnoldy, RNPsychiatric/Mental Health Registered Nurse1881019685
- Mariann Bernard, NPFamily Nurse Practitioner1508193194
- Martha Bok, PHARMDPharmacist1174512768
- Rueben Dallas, R.N.Registered Nurse1780080382
Verify Sonia Okuyama Sasaki in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical Board
Search for license 49898Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
70% fewer Medicare Part D claims than the average hematology & oncology physician in 2024
265 Medicare Part D claims for 61 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 35% of claims.
Most prescribed
- Revlimid24 claims
- Anastrozole19 claims
- Ondansetron Hcl19 claims
- Prochlorperazine Maleate19 claims
- Hydroxyurea15 claims
- Lynparza15 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): 91.1 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).
Industry payments in 2024: $118.99
1 payment: food and beverage; the largest payer was Janssen Biotech, Inc. The 8,560 providers of this specialty with any payment received $7,481.41 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.
Bills Medicare through one group practice
- Denver Health And Hospital AuthorityDenver, CO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Sonia Okuyama Sasaki among 212 hematology & oncology physician records in Colorado
Sonia Okuyama Sasaki, MD is one of 212 hematology & oncology physician records with a practice address in Colorado. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 49% of them.
- NPI issued2007 · 49% of these records are older, 34% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated2004 · median 2004 among the 150 with a school on file
- Record last updated2021 · 59% 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 Colorado 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 Colorado
There are 212 hematology & oncology physician records in Colorado.
All 212 in Colorado → Every provider in Denver → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Gray Jodon, MDDenver, CO 802041437503224
- Michael McLaughlin, MDDenver, CO 802041679534648
- Ana Oton, MDDenver, CO 802041821132168
- Peter Raich, MDDenver, CO 802041922117530
- Sandhya Sharma, MDDenver, CO 802041245671700
- Ankita Tandon, DODenver, CO 802041669977211
- Christiane Thienelt, MDDenver, CO 802041023128873
- Lala Cornelius, MDDenver, CO 802051538107149
Common questions
What is Sonia Okuyama Sasaki, MD's NPI number?
Sonia Okuyama Sasaki, MD's National Provider Identifier (NPI) is 1053520049, issued on May 22, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Sonia Okuyama Sasaki, MD located?
The NPPES record lists a practice address at 700 Delaware St, Denver, CO, 80204. Phone: (303) 602-6062. Providers update this record themselves, so call before visiting.
How can I verify Sonia Okuyama Sasaki, MD's license?
NPPES lists Colorado license number 49898, as entered by the provider. Search the Colorado Medical Board at https://dpo.colorado.gov/Medical. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Sonia Okuyama Sasaki, MD prescribe under Medicare Part D?
In 2024, Sonia Okuyama Sasaki, MD had 265 Medicare Part D claims for 61 beneficiaries; the average among hematology & oncology physician prescribers was 877. Part D covers Medicare prescriptions only.
What is Sonia Okuyama Sasaki, MD's MIPS final score?
The 2023 MIPS final score is 91.1 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.