DR. MICHAEL ACHILLES MARKOS (M.D.) – Critical Care Medicine (Internal Medicine) Physician, NPI 1861658007
Critical Care Medicine (Internal Medicine) Physician
Main info
Doctor Profile
Contacts
Profile Insights
NPPES metrics only — not quality of care.
848 PULMONARY DISEASE in IL
Loading map...
Provider Addresses for DR. MICHAEL ACHILLES MARKOS (M.D.)
Mercy Hospital & Medical Center, 2525, South Michigan Avenue, Near South Side, Chicago, Cook County, Illinois, 60616, United States
CHICAGO, IL 606162315
Phone: (312) 567-5564
Fax: (312) 328-7819
Type: Location
3249 OAK PARK AVE OFC
BERWYN, IL 604020715
Phone: (708) 783-2232
Fax: (708) 783-2078
Type: Mailing
3249 OAK PARK AVE
BERWYN, IL 604023429
Phone: (708) 783-2232
Fax: (708) 783-2078
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
Loading prescription activity...
Open Payments (CMS)
CMS reports 1 Open Payments records for all available years, with a total value of $21.
Total Amount is formed as General ($21) + Research ($0) + Ownership ($0) = $21.
Last reported payment date: 2024-04-17 • Largest payer in this snapshot: Mylan Specialty L.P. ($21).
Total Amount
$21
General + Research + Ownership
Payments
1
Total payment records
General Amount
$21
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-04-17
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Mylan Specialty L.P. | $21 |
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2009-07-24
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20090724000496 | I | Pulmonary Disease | IL | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 99291 | Critical care, first 30-74 minutes | 239 | 90 | $0 |
| 99232 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 119 | 86 | $0 |
| 99222 | Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 13 | 13 | $0 |
Insurance plans in this area (ZIP 60616)
Loading plans...
Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| PULMONARY DISEASE | IL | 93010 | Routine electrocardiogram (EKG) using at least 12 leads with interpretation and report | 26 | 17 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| - | IL | |
| - | IL | |
| N E U R O L O G Y | IL | |
| Family Practice | IL | |
| Internal Medicine, Pediatric Medicine | IL | |
| Hospitalist, Family Practice | TX | |
| - | IL | |
| - | IL | |
| - | IL | |
| - | IL |
Reviews
All reviews are moderated before publication. Reviews reflect users' opinions; we do not verify the accuracy of individual reviews.
No reviews yet. Be the first to share your experience — your opinion helps families compare providers.