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Products & Services
About Grayhack John MD
Grayhack John MD is a company operating in Healthcare provider, employing 1-5 people, reporting $0M-$1M in annual revenue, classified under Offices of Physicians (except Mental Health Specialists) and based in Chicago, Illinois, United States.
Its primary NAICS classification is 621111 (Offices of Physicians (except Mental Health Specialists)). Grayhack John MD is one of 175,537 Healthcare & Life Science companies listed in Illinois.
Business Contact Information
- Phone
- +1 (312) 6958146
- Address
- 675 N Saint Clair St, Chicago, Illinois, 60611, United States
Industry & Classification
- Industry
- Healthcare & Life Science
- Sector
- Healthcare provider
NAICS Codes
- 62Health Care and Social Assistance
- 6211Offices of Physicians
- 621111Offices of Physicians (except Mental Health Specialists)
SIC Codes
- 80Health Services
- 801Offices And Clinics Of Doctors Of Medicine
- 8011Offices of Physicians, Mental Health Specialists
Company Details
- Employees
- 4 (1-5)
- Annual Revenue
- $404,000 ($0M-$1M)
Grayhack John MD: frequently asked questions
What does Grayhack John MD do?
Grayhack John MD is a company operating in Healthcare provider, employing 1-5 people, reporting $0M-$1M in annual revenue, classified under Offices of Physicians (except Mental Health Specialists) and based in Chicago, Illinois, United States.
Where is Grayhack John MD located?
Grayhack John MD is headquartered at 675 N Saint Clair St, Chicago, Illinois, 60611, United States.
How many employees does Grayhack John MD have?
Grayhack John MD has about 4 employees (the 1-5 range).
What is Grayhack John MD's annual revenue?
Grayhack John MD's annual revenue is estimated at $404,000 (the $0M-$1M range).
What industry is Grayhack John MD in?
Grayhack John MD is in the Healthcare & Life Science / Healthcare provider industry, and its primary NAICS code is 621111 (Offices of Physicians (except Mental Health Specialists)).
How can I contact Grayhack John MD?
Its phone number is +1 (312) 6958146.
What companies are similar to Grayhack John MD?
Other large healthcare & Life Science companies in Illinois include CommonSpirit Health, McDonald's Corp, Advocate Aurora Health and Northwestern Medicine.
Largest healthcare & life science companies in Illinois
Largest companies in Illinois
Largest healthcare & life science companies
Manufacturing sales in Illinois, 2026
In Illinois, Factur's 2026 study counted 74 manufacturing quotes worth $11.8M and 14 purchase orders over 12 months: 19% of quotes became orders, against 21% nationally. See the Illinois data.
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