Ryan Anthony Vaca, M.D.
Hematology & Oncology Physician · Sioux Falls, SD
Ryan Anthony Vaca, M.D. is a hematology & oncology physician with a practice address in Sioux Falls, South Dakota, and NPI 1700222148, issued on May 13, 2013. Check the license (South Dakota 12727, as entered in NPPES) on the South Dakota Board of Medical and Osteopathic Examiners; the Medicare figures below come from public CMS files.
- Name
- Ryan Anthony Vaca
- Credential
- M.D.
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- 12727 SD
Self-reported in NPPES; status is on the state search - Practice location
- 1000 E 23RD St Ste 230, Sioux Falls, SD 57105
- Phone
- (605) 322-6900
- Enumerated
- May 13, 2013
- Record last updated
- Sep 1, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (605) 322-6901
- Medicare enrollment
- Enrolled (PECOS I20210831002742); accepts Medicare assignment
- Medical or professional school
- Sanford School Of Medicine Of University Of South Dakota, 2013
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 31 in South Dakota → Look up another NPI →
Also registered at 1000 E 23RD St Ste 230
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Alyssa Anderson, NP-CFamily Nurse Practitioner1952659906
- Isabelle Joffer, CNPNurse Practitioner1073379483
- Ashley Martinmaas, PA-CPhysician Assistant1134578289
- Houman Nourkeyhani, M.D.Hematology & Oncology Physician1184935652
Verify Ryan Anthony Vaca in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersSouth Dakota Board of Medical and Osteopathic Examiners
Search for license 12727Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
16% more Medicare Part D claims than the average hematology & oncology physician in 2024
1,018 Medicare Part D claims for 166 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 25% of claims. 23 claims were for opioids.
Most prescribed
- Prednisone124 claims
- Eliquis76 claims
- Levothyroxine Sodium64 claims
- Gabapentin49 claims
- Abiraterone Acetate45 claims
- Ondansetron Odt40 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: $22.33
1 payment: food and beverage; the largest payer was Daiichi Sankyo 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 2 group practices
- Avera MarshallMarshall, MN
- Avera MckennanSioux Falls, SD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ryan Anthony Vaca among 31 hematology & oncology physician records in South Dakota
Ryan Anthony Vaca, M.D. is one of 31 hematology & oncology physician records with a practice address in South Dakota. 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 2013, is newer than 77% of them.
- NPI issued2013 · 77% of these records are older, 19% newer
- In a Medicare fileYes · 87% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated2013 · median 2007 among the 21 with a school on file
- Record last updated2021 · 71% 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 South Dakota 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 South Dakota
There are 31 hematology & oncology physician records in South Dakota.
All 31 in South Dakota → Every provider in Sioux Falls → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Roberto Ferro Valdes, M.D.Sioux Falls, SD 571051861780108
- Mark Huber, M.D.Sioux Falls, SD 571051750357299
- Waqas Jehangir, MD, MBBSSioux Falls, SD 571051659752541
- Kelly McCaul, M.D.Sioux Falls, SD 571051295701522
- Michael McHale, MDSioux Falls, SD 571051124017256
- Heidi McKean, MDSioux Falls, SD 571051992714281
- Houman Nourkeyhani, M.D.Sioux Falls, SD 571051184935652
- Vinod Parameswaran, M.D.Sioux Falls, SD 571051013983352
Common questions
What is Ryan Anthony Vaca, M.D.'s NPI number?
Ryan Anthony Vaca, M.D.'s National Provider Identifier (NPI) is 1700222148, issued on May 13, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Ryan Anthony Vaca, M.D. located?
The NPPES record lists a practice address at 1000 E 23RD St Ste 230, Sioux Falls, SD, 57105. Phone: (605) 322-6900. Providers update this record themselves, so call before visiting.
How can I verify Ryan Anthony Vaca, M.D.'s license?
NPPES lists South Dakota license number 12727, as entered by the provider. Search the South Dakota Board of Medical and Osteopathic Examiners at https://www.sdbmoe.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Ryan Anthony Vaca, M.D. prescribe under Medicare Part D?
In 2024, Ryan Anthony Vaca, M.D. had 1,018 Medicare Part D claims for 166 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.
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.