WILLIAM BAYER MD NPI 1528162898

NPI Information

  • NPI: 1528162898
  • Provider Name: WILLIAM BAYER, MD
  • Classification: Internal Medicine - 207RE0101X
  • Specialization: Endocrinology, Diabetes & Metabolism
  • Entity Type: Individual
  • PECOS Registration: Yes
  • Address: 501 THORNHILL DR
    CAROL STREAM, IL
    ZIP 60188
  • Phone: (630) 668-3210

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NPI Details

William Bayer, MD is an endocrinology and diabetes and metabolism internal medicine in Carol Stream, IL with 40 years of experience. The provider is an internist who concentrates on disorders of the internal (endocrine) glands such as the thyroid and adrenal glands. This specialist also deals with disorders such as diabetes, metabolic and nutritional disorders, obesity, pituitary diseases and menstrual and sexual problems. William Bayer, MD NPI is 1528162898. The provider is registered as an individual entity type.

The NPPES NPI record indicates the provider is a male.

Education
Medical School: LOYOLA UNIVERSITY OF CHICAGO, STRITCH SCHOOL OF MEDICINE
Graduation Year:1986

The provider's business location address is:

501 THORNHILL DR
CAROL STREAM, IL
ZIP 60188-793
Phone: (630) 668-3210
Fax: (630) 668-3505

The NPI 1528162898 is registered in the Medicare Provider, Enrollment, Chain and Ownership System (PECOS). The provider is legally eligible to order and refer Part B (Clinical Laboratory and Imaging), Durable Medical Equipment, Part A Home Health Agency (HHA), Power Mobility Devices.

The following top HCPCS codes were publicly reported for this provider under the Medicare program for the year 2016. The reported codes are based on the top codes for each available Medicare specialty, excluding evaluation and management codes.

  • Injection, denosumab, 1 mg (HCPCS:J0897)
  • Established patient office or other outpatient visit, 30-39 minutes (HCPCS:99214)
  • Insertion of needle into vein for collection of blood sample (HCPCS:36415)
  • Hemoglobin a1c level (HCPCS:83036)
  • Injection of drug or substance under skin or into muscle (HCPCS:96372)
  • Continuous monitoring of blood sugar level in tissue fluid using sensor under skin with interpretation and report (HCPCS:95251)
  • New patient office or other outpatient visit, 45-59 minutes (HCPCS:99204)
  • Follow-up hospital inpatient care per day, typically 25 minutes (HCPCS:99232)
  • New patient office or other outpatient visit, 30-44 minutes (HCPCS:99203)
  • Initial hospital inpatient care per day, typically 50 minutes (HCPCS:99222)
  • Established patient office or other outpatient visit, 40-54 minutes (HCPCS:99215)

The enumeration date for this NPI number is 9/8/2006 and was last updated on 3/25/2015.

Taxonomy Codes

The NPI record includes the healthcare provider taxonomy classification, state license number and state of licensure. The following information regarding the scope of practice of this provider is available:

No. Taxonomy Code Taxonomy Clasification Taxonomy Specialization License Number License State Primary
1207RE0101XInternal MedicineEndocrinology, Diabetes & Metabolism036077734ILLINOISYes

Other Identifiers

The following information regarding additional identifiers associated to this NPI record includes the other identifier number, identifier type, identifier state and issuer.

No. Other Provider Identifier Other Provider Identifier Type Other Provider Identifier State Other Provider Identifier Issuer
1L16030MEDICARE ID-TYPE UNSPECIFIEDILLINOIS
2E82083MEDICARE UPIN
3206147OTHERILLINOISMEDICARE GROUP PTAN
4036108659OTHERILLINOISMEDICAID
5F400144099OTHERILLINOISMEDICARE INDIVIDUAL PTAN
6036077734MEDICAIDILLINOIS

What is NPI?

NPI stands for National Provider Identifier. The NPI is a 10-digit identification number that is completely unique. The NPI number by itself does not contain any identifiable information such as a provider’s speciality or location. The NPI is assigned to individuals or organizacions for their lifespan and it is independent of key provider information type updates like a change of practices, location or speciality.

This page was last updated on: 11/21/2025

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