John Grayhack, MD
Orthopaedic Surgery Physician · Chicago, IL
John Grayhack, MD is an orthopaedic surgery physician with a practice address in Chicago, Illinois, and NPI 1043205966, issued on Sep 16, 2005. Check the license (Illinois 036072869, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- John Grayhack
- Credential
- MD
- Primary taxonomy
- Orthopaedic Surgery Physician 207X00000X
- License number
- 036072869 IL
Self-reported in NPPES; status is on the state search - Practice location
- 225 E Chicago Ave # 69, Chicago, IL 60611
- Phone
- (312) 227-6190
- Enumerated
- Sep 16, 2005
- Record last updated
- Feb 15, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (312) 227-9404
- Medicaid IDs
- 036072869 IL
82419800 WI - Entity
- Type 1 · individual
8 nearest orthopaedic surgery physician records → All 995 in Illinois → Look up another NPI →
Also registered at 225 E Chicago Ave # 69
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Elizabeth Castro, PA-CPhysician Assistant1780210195
- Craig Finlayson, MDOrthopaedic Surgery Physician1861663270
- Erik King, MDOrthopaedic Surgery Physician1245226893
- Cynthia Labella, MDSports Medicine (Internal Medicine) Physician1033104955
- Kristine Santos Martin, APNPediatric Nurse Practitioner1639463870
- John Sarwark, MDOrthopaedic Surgery Physician1780670331
Verify John Grayhack in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
Search for license 036072869Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $307.40
5 payments; by number, the most common kind was travel and lodging; the largest payer was OrthoPediatrics Corp. The 15,003 providers of this specialty with any payment received $23,022.89 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.
John Grayhack among 995 orthopaedic surgery physician records in Illinois
John Grayhack, MD is one of 995 orthopaedic surgery physician records with a practice address in Illinois. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 86% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileNo · 56% of these records are
- Record last updated2013 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207X00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Orthopaedic Surgery Physician providers in Illinois
There are 995 orthopaedic surgery physician records in Illinois.
All 995 in Illinois → Every provider in Chicago → Orthopaedic Surgery Physician nationwide →
The 8 orthopaedic surgery physician records with the nearest ZIP codes
- Proctor Anderson, M.D.Chicago, IL 606111144292681
- Stephen Gryzlo, MDChicago, IL 606111588690911
- John Hefferon, M.D.Chicago, IL 606111982677480
- Anish Kadakia, MDChicago, IL 606111467495994
- Armen Kelikian, MDChicago, IL 606111790737757
- Erik King, MDChicago, IL 606111245226893
- Laura Lemke, M.D.Chicago, IL 606111396716080
- Guido Marra, MDChicago, IL 606111023082328
Common questions
What is John Grayhack, MD's NPI number?
John Grayhack, MD's National Provider Identifier (NPI) is 1043205966, issued on Sep 16, 2005. An NPI identifies a provider in billing; it is not a license.
Where is John Grayhack, MD located?
The NPPES record lists a practice address at 225 E Chicago Ave # 69, Chicago, IL, 60611. Phone: (312) 227-6190. Providers update this record themselves, so call before visiting.
How can I verify John Grayhack, MD's license?
NPPES lists Illinois license number 036072869, as entered by the provider. Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
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.