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Orthopedic Surgery

Carl N. Graf Iii, MD

Works at hospitals in McHenry, IL · Hoffman Estates, IL · Illinois

Summary

Dr. Carl N. Graf Iii, MD is an orthopedic surgeon at 415 E Congress Pkwy, Suite E, Crystal Lake, IL 60014. Phone: (847) 519-9700. Accepts Medicare assignment. In 2024, Carl N. Graf Iii had 200 Original Medicare patients and 1,112 services. NPI 1700981107. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026; CMS Medicare Physician & Other Practitioners, data year 2024.

  • Specialty: Orthopedic surgeon (Medicare lists Orthopedic Surgery)
  • Address: 415 E Congress Pkwy, Suite E, Crystal Lake, IL 60014 · Directions (1 more location)
  • Phone: (847) 519‑9700
  • Medicare: Accepts Medicare assignment
  • Hospitals: Northwestern Medicine McHenry, St Alexius Medical Center
  • Group practice: Illinois Spine Institute, S.C.
  • Medical school: Loyola University Of Chicago, Stritch School Of Medicine · graduated 2000 (26 years since medical school)
  • Gender (as listed): Male

From official Medicare data

This page shows what Medicare's official clinician data says about Carl N. Graf Iii, joined by NPI number (data updated October 2, 2026). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

Quick answers

Does Carl N. Graf Iii accept Medicare assignment?
Yes. Medicare's clinician data says Carl N. Graf Iii accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
How many Medicare patients does Carl N. Graf Iii see?
In 2024, CMS data shows 200 Original Medicare patients and 1,112 services for Carl N. Graf Iii. This counts Original Medicare only and measures volume, not quality.
What is Carl N. Graf Iii's NPI number?
1700981107. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Medicare activity in 2024

Official CMS public-use data for Carl N. Graf Iii, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.

Original Medicare patients200
Services billed to Medicare1,112
Different services or procedures23
Participating Medicare providerYes
Average age of these patients73

Most frequent services

  1. Therapy procedure using exercise to develop strength, endurance, range of motion, and flexibility, each 15 minutes (97110)432 services
  2. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)225 services
  3. New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)123 services
  4. Therapy procedure using manual technique, each 15 minutes (97140)111 services
  5. X-ray of lower and sacral spine, minimum of 4 views (72110)43 services

Chronic conditions among these patients

Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).

  • High cholesterol75%
  • Arthritis75%
  • High blood pressure74%
  • Anxiety30%
  • Ischemic heart disease27%
  • Depression23%

Hospitals where Carl N. Graf Iii works

Medicare's Facility Affiliation Data lists Carl N. Graf Iii at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

Practice locations

Addresses where Carl N. Graf Iii is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Carl N. Graf Iii as a member of this group (CMS data updated October 2, 2026).

  • Illinois Spine Institute, S.C.3 clinicians in the group

Specialties

Find other Orthopedic Surgery doctors in Illinois →

Other orthopedic surgeons in Illinois

Clinicians with the same Medicare primary specialty in Illinois — not a recommendation.

All orthopedic surgeons in Illinois →

Other clinicians in Illinois Spine Institute, S.C.

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

Clinician information

CredentialMD
Medical schoolLoyola University Of Chicago, Stritch School Of Medicine
Graduation year2000 (26 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1700981107
CorrectionsReport an error or suggest an update →

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

  1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
  2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
  3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
  4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
  5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  6. Medicare Care Compare — official Medicare tool to look up clinicians