OrganizationActive
William Markey Md,sc
NPI 1265667158 · Gastroenterology Physician · Chicago, IL
William Markey Md,sc is a Gastroenterology Physician organization in Chicago, IL (NPI 1265667158).
Provider details
- NPI number
- 1265667158
- Entity type
- Organization
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Willaim Markey, President(312) 944-2188
- License
- 036046023 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(86/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
17 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
3000 N Halsted St Ste 506
Chicago, IL 60657-5194
Phone: (312) 944-2188
Street-level locationGet directions
Mailing address
Po Box 146530
Chicago, IL 60614-6400
Registry dates
- Enumerated
- 2009-05-20
- Last updated
- 2009-05-20
Frequently asked questions
- What is William Markey Md,sc's NPI number?
- William Markey Md,sc's National Provider Identifier (NPI) is 1265667158, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is William Markey Md,sc?
- William Markey Md,sc is classified in the NPPES registry as Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is William Markey Md,sc located?
- William Markey Md,sc's practice location on file with NPPES is 3000 N Halsted St Ste 506, Chicago, IL 60657-5194.
- What is William Markey Md,sc's phone number?
- The practice phone number listed in the NPPES registry for William Markey Md,sc is (312) 944-2188.
- Who is the authorized official for William Markey Md,sc?
- The authorized official listed on William Markey Md,sc's NPPES record is Willaim Markey, President. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is William Markey Md,sc's NPI active?
- Yes — William Markey Md,sc's NPI (1265667158) is active in the NPPES registry as of the last update on 2009-05-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.