MARK E MASS (MD) – Urgent Care Clinic/Center, NPI 1841276847
Urgent Care Clinic/Center
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
2,845 EMERGENCY MEDICINE in IL
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Provider Addresses for MARK E MASS (MD)
475, McCormick Drive, Lapeer, Lapeer County, Michigan, 48446, United States
LAKE FOREST, IL 600453349
Phone: (847) 814-9376
Fax: (847) 234-7940
Type: Mailing
1025, West Everett Road, West Lake Forest Business District, Lake Forest, Lake County, Illinois, 60045, United States
SUITE 101
LAKE FOREST, IL 600452697
Phone: (847) 234-7950
Fax: (847) 234-7940
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
No Open Payments data available for this provider.
This can happen when there are no reportable CMS Open Payments records.
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: 2011-01-14
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 |
|---|---|---|---|---|
| I20110114001063 | I | Emergency Medicine | 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 |
|---|---|---|---|---|
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 302 | 228 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 142 | 110 | $0 |
| 87428 | Detection test by immunoassay technique for severe acute respiratory syndrome coronavirus and influenza | 116 | 111 | $0 |
| J0696 | Injection, ceftriaxone sodium, per 250 mg | 96 | 16 | $0 |
| 99203 | New patient office or other outpatient visit, 30-44 minutes | 88 | 88 | $0 |
Insurance plans in this area (ZIP 60045)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Emergency Medicine | IL | |
| Emergency Medicine | IL | |
| Emergency Medicine | IL |
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