MARK A OYER MD
NPI 1679968812
Orthopaedic Surgery in Rockford, IL

Q: What is Mark Oyer's NPI number?

The NPI number for Mark Oyer is 1679968812. It was assigned to this individual provider in the NPPES registry on April 4, 2015.

Q: What is Mark Oyer's specialty?

The primary specialty registered for this NPI is Orthopaedic Surgery with taxonomy code 207X00000X.

Q: When was this NPI record last updated?

The NPPES record for Mark Oyer was last updated on August 3, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.

Active since April 04, 2015PECOS EnrolledAccepts Medicare Assignment

70.99/100

CMS Quality Rating

5875 E RIVERSIDE BLVD, ROCKFORD, IL 61114(815) 398-9491(815) 381-7498 Get Directions Write a Review

NPPES record last updated: August 3, 2023. Verified against the NPPES registry weekly; last sync: November 08, 2026.

Record update history: Dec 21, 2021, Jul 26, 2021, Mar 19, 2021 and 3 more (6 updates tracked since 2016).

On this page

About Mark A Oyer Md NPPES

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

MARK A OYER MD (NPI 1679968812) is an individual orthopaedic surgery provider in Rockford, Illinois, licensed in Illinois (036-154989) and active in the NPI registry since April 2015. He is enrolled in Medicare PECOS, is affiliated with Katherine Shaw Bethea Hospital, and is a graduate of Other (2015).

NPPES Registry Identity

NPI1679968812

Entity TypeIndividualMale

Primary Taxonomy207X00000X

Provider Legal NameMARK A OYERCredential: MD

Location Address5875 E RIVERSIDE BLVDRockford, IL 61114-4937

Mailing AddressPo Box 735263Chicago, IL 60673-5263

Phone(815) 398-9491

Fax(815) 381-7498

Sole ProprietorNo

Medical School CMSOtherGraduated 2015

Enumeration DateApril 4, 2015

Last NPPES UpdateAugust 3, 20236 updates tracked since enumeration

NPPES CertifiedAugust 3, 2023

✔ NPI 1679968812 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOrthopaedic SurgeryAllopathic & Osteopathic Physicians

Taxonomy Code207X00000X

Licenses✔ Licensed in IL · 036-154989✔ Licensed in WI · 73696

Definition

An orthopaedic surgeon is trained in the preservation, investigation and restoration of the form and function of the extremities, spine and associated structures by medical, surgical and physical means. An orthopaedic surgeon is involved with the care of patients whose musculoskeletal problems include congenital deformities, trauma, infections, tumors, metabolic disturbances of the musculoskeletal system, deformities, injuries and degenerative diseases of the spine, hands, feet, knee, hip, shoulder and elbow in children and adults. An orthopaedic surgeon is also concerned with primary and secondary muscular problems and the effects of central or peripheral nervous system lesions of the musculoskeletal system.

5875 E RIVERSIDE BLVD, Rockford, IL 61114

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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Dean Health Plan, Quartz.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

Mark A Oyer Md 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 ID7416252267

PECOS Enrollment IDI20210628002113

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

Medicare enrollment records show Mark Oyer reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Orthomidwest, PLLC

3.5 mi

Orthopaedic Surgery

324 ROXBURY RD
Rockford, IL 61107

Reassigned Medicare billing, Illinois and Wisconsin enrollments
562 clinicians in this Medicare group

NPI 1730136474 (815) 398-9491

Midwest Orthopaedics At Rush, LLC

75 mi

Orthopaedic Surgery

1611 W HARRISON ST, # 400
Chicago, IL 60612

Reassigned Medicare billing, Illinois enrollment
7 clinicians in this Medicare group

NPI 1811942451 (312) 432-2300

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 20

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.

Injection, triamcinolone acetonide, not otherwise specified, 10 mg J3301

Triamcinolone acetonide is a medication used to reduce inflammation in the body. It's given as a 10 mg injection for conditions like allergies, arthritis, or skin problems. The injection helps to decrease swelling, redness, and itching.

824 services146 patients

X-ray of knee, 1-2 views 73560

An X-ray of the knee with 1-2 views is a quick, painless test that produces images of the knee bones. It helps identify fractures, infections, or changes in the knee joint. During the procedure, you'll be asked to stay still while the X-ray machine captures the images.

590 services345 patients

X-ray of hip, 2-3 views 73502

An X-ray of the hip with 2-3 views is a non-invasive imaging test. It uses a small amount of radiation to produce pictures of the hip joint. These images help in diagnosing conditions like fractures, arthritis, or other abnormalities. The process is quick and painless.

419 services257 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

314 services261 patients

X-ray of knee, 4 or more views 73564

An X-ray of the knee, 4 or more views, is a non-invasive imaging test. It involves capturing multiple images of your knee from different angles. This helps in diagnosing conditions such as fractures, arthritis, or infections. The procedure is quick and painless.

265 services256 patients

Aspiration and/or injection of fluid from large joint 20610

This procedure involves using a needle to remove (aspiration) or introduce (injection) fluid into a large joint like the knee or hip. It can help diagnose conditions, relieve discomfort, or deliver medication directly to the joint.

239 services194 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

168 services168 patients

X-ray for bone length assessment 77073

An X-ray for bone length assessment is a simple, non-invasive imaging test. It helps to evaluate the length of your bones and identify any discrepancies or abnormalities. This procedure is quick, painless, and provides valuable information for your healthcare provider.

133 services127 patients

Replacement of knee joint, both sides of knee 27447

A bilateral knee joint replacement is a procedure where the damaged parts of both your knee joints are replaced with artificial parts. It aims to relieve pain and improve mobility. The process involves a surgical operation under anesthesia.

130 services126 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.

106 services103 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

96 services96 patients

Computer-assisted surgery for muscle and bone procedure 20985

Computer-assisted surgery for muscle and bone procedures involves using a computer to aid in planning and performing surgery. This technology helps increase precision, reduce invasiveness, and improve outcomes. It's commonly used in orthopedic surgeries like joint replacements.

93 services89 patients

Replacement of thigh bone and hip joint with prosthesis 27130

This procedure, known as hip arthroplasty, involves replacing your damaged thigh bone and hip joint with artificial parts, called a prosthesis. It helps relieve pain, improve mobility, and enhance your quality of life.

80 services74 patients

Computer-assisted, fluoroscopic image-guided musculoskeletal surgical navigational orthopedic operation 0054T

This is a high-tech procedure where a computer aids in navigating surgical instruments, using real-time images. It enhances precision during orthopedic operations, helping to protect surrounding tissues and improve outcomes. It's like GPS for surgery!

67 services65 patients

Hyaluronan or derivative, gel-one, for intra-articular injection, per dose J7326

Hyaluronan or Gel-One is a substance injected directly into your joint space. It's aimed to supplement your body's natural joint fluid, helping to lubricate and cushion the joint, reducing pain and improving mobility. It's often used for arthritis relief.

47 services36 patients

X-ray of both hips, minimum of 5 views 73523

An X-ray of both hips with a minimum of 5 views is a non-invasive imaging test. It uses a small amount of radiation to produce images of the hip joints from different angles. This aids in diagnosing conditions such as fractures, arthritis, or other hip abnormalities.

36 services35 patients

Mri scan of leg joint without contrast 73721

An MRI scan of your leg joint is a non-invasive procedure that uses magnetic fields and radio waves to create detailed images of the structures within your leg. This helps doctors diagnose or monitor conditions without using contrast dye.

34 services31 patients

X-ray of pelvis, 1-2 views 72170

An X-ray of the pelvis, 1-2 views, is a quick and painless imaging test. It uses a small amount of radiation to produce images of the lower part of your torso. These images help to detect any abnormalities or injuries in your hip bones and surrounding structures.

27 services24 patients

Removal of knee cartilage using an endoscope 29881

This procedure, known as arthroscopic knee surgery, involves using a small camera (endoscope) to view the inside of your knee. Small instruments are used to remove damaged cartilage. This can help alleviate pain and improve knee function.

14 services14 patients

Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more 99212

This is a routine check-up for patients who have previously seen the doctor. During this 10-19 minute visit, the doctor will review your health status, discuss any concerns, and manage ongoing treatments or medications. It's a chance to ensure your health is on track.

11 services11 patients

Hospital Affiliations CMS Care Compare 5

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

Katherine Shaw Bethea Hospital

Acute Care Hospitals · Dixon, IL

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number140012

Location403 E 1st StDixon, IL 61021 · Lee County

Emergency services Birthing friendly

Cgh Medical Center

Acute Care Hospitals · Sterling, IL

2/5 CMS rating

OwnershipGovernment - Local

CMS Certification Number140043

Location100 East Lefevre RoadSterling, IL 61081 · Whiteside County

Emergency services Birthing friendly

Fhn Memorial Hospital

Acute Care Hospitals · Freeport, IL

3/5 CMS rating

OwnershipVoluntary non-profit - Other

CMS Certification Number140160

Location1045 West Stephenson StreetFreeport, IL 61032 · Stephenson County

Emergency services Birthing friendly

Saint Anthony Medical Center

Acute Care Hospitals · Rockford, IL

2/5 CMS rating

OwnershipVoluntary non-profit - Church

CMS Certification Number140233

Location5666 East State StreetRockford, IL 61108 · Winnebago County

Emergency services Birthing friendly

Osf Saint Paul Medical Center

Critical Access Hospitals · Mendota, IL

OwnershipVoluntary non-profit - Church

CMS Certification Number141310

Location1401 E 12th StreetMendota, IL 61342 · La Salle County

Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 61114 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

$85.71 typical visit price

range $54.80 – $168.44

Typical copayment $21.42 (range $13.70 – $42.11)

Most-billed visit code 99203

Established Patient

$68.64 typical visit price

range $17.16 – $136.56

Typical copayment $17.16 (range $4.29 – $34.14)

Most-billed visit code 99213

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.

70.99/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored as part of a group practice

Quality

Promoting Interoperability

Improvement Activities

Cost

63.98

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.

Walker, folding, wheeled, adjustable or fixed height E0143

DME-Other DME · category DE000N

4 suppliers21 claims21 services$54.41 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 20

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

DR. LIZA A DAFCHAHI SHIRANI MD

Anesthesiology