Ayman Nasir, M.D
Hospitalist · Internal Medicine (CMS) · Chicago, IL
At a glance
5145 N California Ave, Chicago, IL 60625-3661
NPPES record updated Feb 9, 2026. Public records can lag behind changes at a practice.
Before you call: a quick checklist
- Are you accepting new patients?
- Do you accept my specific insurance plan?
- Do you provide the service I need at this address?
- Do I need a referral, and what is the earliest appointment?
Insurance participation and appointment availability are not established by these public records.
Medicare & insurance
Insurance participation is not established by these public records. Ask the practice and your insurer about your specific plan and this location.
How to check your coverage
Use your plan’s provider directory or the member-services number on your insurance card. Confirm the clinician, practice address, service, and whether a referral is required. A missing opt-out record does not establish Medicare acceptance.
Check the official Medicare directory ↗Practice location
5145 N California AveChicago, IL 60625-3661
Additional reported practice locations
1401 Jefferson HwyNew Orleans, LA 701212426
Phone: 5048429216
Fax: 5048423193 701 10Th St Se # 701
Cedar Rapids, IA 524031251
Phone: 3198617803 3001 Hospital Drive 5Th Floor
Prince George's Hospital Center, Department Of Medicine
Cheverly, MD 20785
Phone: 3016183776
Fax: 3016182986
Education & affiliations
- Medical / professional school
- Not reported in this file
- Graduation year
- 2016
- CMS specialties
- Hospitalist · Internal Medicine
Practice groups
- Cogent Healthcare Of Iowa Pc
- Endeavor Health Medical Group
- Prime Healthcare Illinois Medical Group Llc
- Rockford Hospitalist Group Llc
Reported hospital affiliations
- Amita Health Resurrection Medical Center Chicago, IL
- Mercy Medical Center - Cedar Rapids Cedar Rapids, IA
- Northshore University Healthsystem - Evanston Hospital Evanston, IL
- Presence Saints Mary And Elizabeth Medical Center Chicago, IL
Graduation year does not establish years in practice. A reported affiliation does not establish employment, current admitting privileges, or insurance participation.
Source: CMS National Downloadable File · Published Oct 15, 2026.
Source: CMS Facility Affiliation Data · Published Oct 15, 2026.
Procedures in the public data
Reported activity can help you ask more informed questions about a practice’s services.
No displayed procedure-category record in this release. This does not mean the clinician performs no procedures.
CMS uses a one-year claims window with a reporting lag. Counts cover the Medicare activity included by CMS, not all patients. “1–10” is a published range. Volume is not a quality or outcomes score. Coverage and methodology
Source: CMS Utilization Data · Published Oct 15, 2026.
Find providers with a similar service mix
Compare 2024 published Medicare activity in the same reported specialty, here or in another city.
Industry-reported general payments
No matching general-payment summary in the imported release. This is not a verified zero and does not rule out other payment types or years.
Source: CMS 2025 payments grouped by covered recipient and nature of payments · Published Jun 30, 2026.
Professional details: NPI, taxonomy & registry record
Registry details
- Primary taxonomy
- Hospitalist · Internal Medicine (CMS)
- Taxonomy code
- 208M00000X
- Enumeration date
- May 1, 2017
- Record updated
- Feb 9, 2026
More registry details
- Provider type
- Individual · Type 1
- Reported credentials
- M.D
Reported taxonomies and licenses
207R00000X
License reported: MD-48687 IA
207R00000X
License reported: 036175087 IL
208M00000X · Primary
License reported: 036175087 IL
License numbers and credentials are reported to NPPES; HCPList does not independently verify them.
Practice location
5145 N California AveChicago, IL 60625-3661
- Phone
- (847) 570-1027
- Fax
- (773) 989-1734
Mailing address
2650 RIDGE AVE STE 1223EVANSTON, IL 602011700
Information may be outdated or incomplete. Confirm details directly with the practice. HCPList is an independent directory and is not affiliated with CMS.
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