1. Home
  2. Directory
  3. South Dakota
  4. Sioux Falls
  5. Internal Medicine
  6. NPI Profile

MARK J OPPENHEIMER MD
NPI 1689640187
Internal Medicine - Endocrinology, Diabetes & Metabolism in Sioux Falls, SD

Active since February 24, 2006PECOS Enrolled
3926 S WESTERN AVE, SIOUX FALLS, SD 57105(605) 275-6525(605) 275-6970 Get Directions Write a Review

NPPES record last updated: February 21, 2013. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Mark J Oppenheimer Md NPPES

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

MARK J OPPENHEIMER MD (NPI 1689640187) is an individual endocrinology, diabetes & metabolism provider in Sioux Falls, South Dakota, licensed in South Dakota (2757) and active in the NPI registry since February 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1689640187
Entity TypeIndividualMale
Primary Taxonomy207RE0101X
Provider Legal NameMARK J OPPENHEIMERCredential: MD
Location Address3926 S WESTERN AVESioux Falls, SD 57105-6513
Mailing AddressPo Box 5126Sioux Falls, SD 57117-5126 · (605) 335-1952 · Fax (605) 373-9971
Phone(605) 275-6525
Fax(605) 275-6970
Sole ProprietorNo
Enumeration DateFebruary 24, 2006
Last NPPES UpdateFebruary 21, 2013
✔ NPI 1689640187 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Endocrinology, Diabetes & MetabolismAllopathic & Osteopathic Physicians
Taxonomy Code207RE0101X
License✔ Licensed in SD · 2757
Definition
An internist who concentrates on disorders of the internal (endocrine) glands such as the thyroid and adrenal glands. This specialist also deals with disorders such as diabetes, metabolic and nutritional disorders, obesity, pituitary diseases and menstrual and sexual problems.
3926 S WESTERN AVE, Sioux Falls, SD 57105
Open in Google Maps ↗

Other Identifiers 9

Medicare UPINA95322SD
Medicaid052785800MN
Medicaid2943845IA
Other495R1OPMN · Bcbs
OtherP00194713Railroad Medicare
Medicare PINS100164SD
Medicaid10025206600NE
Medicaid6002053SD
Other4994889SD · Sd Bcbs

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Mark J Oppenheimer Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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.

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
$126.78 typical visit price
range $55.52 – $167.23
Typical copayment $31.69 (range $13.88 – $41.80)
Most-billed visit code 99204
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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

Reported Quality Measures

Diabetes: Eye Exam
Percentage of patients 18-75 years of age with diabetes who had a retinal or dilated eye exam by an eye care professional during the measurement period or a negative retinal exam (no evidence of retinopathy) in the 12 months prior to the measurement period
86%135 patients4/55-star benchmark: 100%
Pneumococcal Vaccination Status for Older Adults
Percentage of patients 65 years of age and older who have ever received a pneumococcal vaccine
100%269 patients5/55-star benchmark: 100%
Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

Referred Medical Equipment & Supplies CMS DME claims 3

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

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253
DME-Other DME · category DE017N
28 suppliers58 claims216 services$6.03 avg. paid by Medicare
Lancets, per box of 100 A4259
DME-Medical/Surgical Supplies · category DA000N
4 suppliers11 claims20 services$1.07 avg. paid by Medicare
Insulin for administration through dme (i.e., insulin pump) per 50 units J1817
Treatment-Injections and Infusions (nononcologic) · category RI000N
5 suppliers11 claims940 services$7.06 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

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

MIDWESTERN ENDOCRINOLOGY LTD
Internal Medicine (Endocrinology, Diabetes & Metabolism)
3926 S WESTERN AVE
SIOUX FALLS, SD 57105
Minnehaha County (605) 275-6525

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 Mark Oppenheimer's NPI number?

The NPI number for Mark Oppenheimer is 1689640187. It was assigned to this individual provider in the NPPES registry on February 24, 2006.

Where is Mark Oppenheimer located?

Mark Oppenheimer practices at 3926 S Western Ave, Sioux Falls, SD 57105. The listed phone number is (605) 275-6525.

What is Mark Oppenheimer's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.

Is Mark Oppenheimer enrolled in Medicare?

Yes. Mark Oppenheimer is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Mark Oppenheimer was last updated on February 21, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.