DR. MARK JAY MCGILLEM (M.D.) – Internal Medicine Physician, NPI 1700877339
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Provider Addresses for DR. MARK JAY MCGILLEM (M.D.)
810, Park Place, Mishawaka, Saint Joseph County, Indiana, 46545, United States
MISHAWAKA, IN 465453520
Phone:
Type: Mailing
Mishawaka Medical Center, 5215, Holy Cross Parkway, Mishawaka, Saint Joseph County, Indiana, 46545, United States
MISHAWAKA, IN 465451469
Phone: (574) 335-2521
Fax: (574) 335-2262
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
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Medicare Enrollment & Revalidation
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Educational use only—not medical, billing, or legal advice.
No Medicare enrollment or revalidation data available for this provider in our database.
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Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
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Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 99222 | Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 427 | 408 | $0 |
| 99223 | Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 117 | 116 | $0 |
| 99221 | Initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 minutes | 11 | 11 | $0 |
Insurance plans in this area (ZIP 46545)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Internal Medicine | IL | |
| - | IN | |
| - | IL | |
| Physician Assistant | IL | |
| Physician Assistant | IN | |
| Internal Medicine | IL | |
| Hospitalist, Family Practice, Family Practice | VA | |
| Internal Medicine | IN | |
| Internal Medicine | OH | |
| Internal Medicine | IN |
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