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DR. RYAN ANTHONY VACA M.D.
NPI 1700222148
Internal Medicine - Hematology & Oncology in Sioux Falls, SD

Active since May 13, 2013PECOS EnrolledAccepts Medicare Assignment
1000 E 23RD ST STE 230, SIOUX FALLS, SD 57105(605) 322-6900(605) 322-6901 Get Directions Write a Review

NPPES record last updated: September 1, 2021. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Dr. Ryan Anthony Vaca M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. RYAN ANTHONY VACA M.D. (NPI 1700222148) is an individual hematology & oncology provider in Sioux Falls, South Dakota, licensed in South Dakota (12727) and active in the NPI registry since May 2013. He is enrolled in Medicare PECOS, is affiliated with Osceola Community Hospital, and is a graduate of Sanford School Of Medicine Of University Of South Dakota (2013).

NPPES Registry Identity

NPI1700222148
Entity TypeIndividualMale
Primary Taxonomy207RH0003X
Provider Legal NameDR. RYAN ANTHONY VACACredential: M.D.
Location Address1000 E 23RD ST STE 230Sioux Falls, SD 57105-2122
Mailing Address1000 E 23rd St Ste 230Sioux Falls, SD 57105-2122 · (605) 322-6900 · Fax (605) 322-6901
Phone(605) 322-6900
Fax(605) 322-6901
Sole ProprietorNo
Medical School CMSSanford School Of Medicine Of University Of South DakotaGraduated 2013
Enumeration DateMay 13, 2013
Last NPPES UpdateSeptember 1, 2021
NPPES CertifiedSeptember 1, 2021
✔ NPI 1700222148 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Hematology & OncologyAllopathic & Osteopathic Physicians
Taxonomy Code207RH0003X
License✔ Licensed in SD · 12727
Definition
An internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine WAS able to obtain a Certificate of Special Qualifications in the field of Hematology and Oncology. The Certificate is NO longer offered.
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
1000 E 23RD ST STE 230, Sioux Falls, SD 57105
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Sunflower Health Plan, Ambetter Health, Ambetter Health of Delaware and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Ryan Anthony Vaca M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID8224266648
PECOS Enrollment IDI20210831002742, I20220216002393
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

4

Medicare enrollment records show Ryan Vaca reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Avera Mckennan
Same address
Hematology & Oncology
1000 E 23RD ST STE 230
Sioux Falls, SD 57105
  • Reassigned Medicare billing, South Dakota enrollment
  • 1,277 clinicians in this Medicare group
NPI 1033185582 (605) 322-6900
Avera Marshall
56 mi
Optometrist
702 10TH ST
Worthington, MN 56187
  • Reassigned Medicare billing, Minnesota enrollment
  • Also billed through NPI 1568401016 (Minnesota)
  • 260 clinicians in this Medicare group
NPI 1417378555 (507) 376-5535
Gundersen Clinic, Ltd.
252 mi
Clinic/Center
110 KING STREET
Fayette, IA 52142
  • Reassigned Medicare billing, Wisconsin enrollment
  • 928 clinicians in this Medicare group
NPI 1053366518 (608) 782-7300
Gundersen Lutheran Medical Center, Inc
274 mi
Clinic/Center
1836 SOUTH AVE
La Crosse, WI 54601
  • Reassigned Medicare billing, Wisconsin enrollment
  • 1,457 clinicians in this Medicare group
NPI 1689918377 (608) 782-7300

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 9

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
295 services117 patients
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
159 services80 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
150 services98 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
131 services97 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
54 services33 patients
New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205
This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.
43 services43 patients

Hospital Affiliations CMS Care Compare 5

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Osceola Community Hospital

Critical Access Hospitals · Sibley, IA
OwnershipVoluntary non-profit - Private
CMS Certification Number161345
Location600 9th Avenue NorthSibley, IA 51249 · Osceola County
Emergency services

Avera Marshall Regional Medical Ctr

Critical Access Hospitals · Marshall, MN
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number241359
Location300 South Bruce StreetMarshall, MN 56258 · Lyon County
Emergency services

Avera St Mary's Hospital

Acute Care Hospitals · Pierre, SD
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number430015
Location801 E SiouxPierre, SD 57501 · Hughes County
Emergency services Birthing friendly

Avera Mckennan Hospital & University Health Center

Acute Care Hospitals · Sioux Falls, SD
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number430016
Location1325 S Cliff AveSioux Falls, SD 57117 · Minnehaha County
Emergency services Birthing friendly

Avera Queen Of Peace

Critical Access Hospitals · Mitchell, SD
OwnershipVoluntary non-profit - Private
CMS Certification Number431340
Location525 N FosterMitchell, SD 57301 · Davison County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 57105 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$167.23 typical visit price
range $55.52 – $167.23
Typical copayment $41.80 (range $13.88 – $41.80)
Most-billed visit code 99205
Established Patient
$97.88 typical visit price
range $18.08 – $137.08
Typical copayment $24.47 (range $4.52 – $34.27)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Referred Medical Equipment & Supplies CMS DME claims

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Capecitabine, oral, 500 mg J8521
Treatment-Treatment - Miscellaneous · category RX029N
1 supplier13 claims1,372 services$0.76 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 5

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

AVERA MCKENNAN
Internal Medicine (Hematology & Oncology)
1000 E 23RD ST STE 230
SIOUX FALLS, SD 57105
Minnehaha County (605) 322-6900
ISABELLE JOFFER CNP
Nurse Practitioner
1000 E 23RD ST STE 230
SIOUX FALLS, SD 57105
Minnehaha County (605) 322-6900
ASHLEY MARTINMAAS PA-C
Physician Assistant
1000 E 23RD ST STE 230
SIOUX FALLS, SD 57105
Minnehaha County (605) 322-6900
DR. HOUMAN NOURKEYHANI M.D.
Internal Medicine (Hematology & Oncology)
1000 E 23RD ST STE 230
SIOUX FALLS, SD 57105
Minnehaha County (605) 322-4996
MRS. ALYSSA BETH ANDERSON NP-C
Nurse Practitioner (Family)
1000 E 23RD ST STE 230
SIOUX FALLS, SD 57105
Minnehaha County (605) 322-6900

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Ryan Vaca's NPI number?

The NPI number for Ryan Vaca is 1700222148. It was assigned to this individual provider in the NPPES registry on May 13, 2013.

Where is Ryan Vaca located?

Ryan Vaca practices at 1000 E 23rd St Ste 230, Sioux Falls, SD 57105. The listed phone number is (605) 322-6900.

What is Ryan Vaca's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.

Is Ryan Vaca enrolled in Medicare?

Yes. Ryan Vaca is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Ryan Vaca's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Ryan Vaca reassigns Medicare benefits to 4 organizations: Avera Mckennan (Sioux Falls, SD), Avera Marshall (Worthington, MN), Gundersen Clinic, Ltd. (Fayette, IA) and Gundersen Lutheran Medical Center, Inc (La Crosse, WI). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Ryan Vaca's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Ryan Vaca accept?

Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from Sunflower Health Plan, Avera Health Plans and Oscar Insurance Company and 2 other insurers list Ryan Vaca as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Ryan Vaca affiliated with any hospitals?

According to CMS data, Ryan Vaca is affiliated with Osceola Community Hospital, Avera Marshall Regional Medical Ctr, Avera St Mary's Hospital, Avera Mckennan Hospital & University Health Center and Avera Queen Of Peace.

When was this NPI record last updated?

The NPPES record for Ryan Vaca was last updated on September 1, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.