DR. MARK ALAN WASHINGTON (M.D.) – Hospitalist Physician, NPI 1396079406
Hospitalist Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
878 HOSPITALIST in IN
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Provider Addresses for DR. MARK ALAN WASHINGTON (M.D.)
7731, Delaware Court, Chapel Manor, Merrillville, Ross Township, Lake County, Indiana, 46410, United States
MERRILLVILLE, IN 464105636
Phone: (219) 682-6065
Type: Mailing
Northlake Campus Methodist Hospitals, 600, Grant Street, Horace Mann, Gary, Lake County, Indiana, 46402, United States
GARY, IN 464026001
Phone: (121) 988-6400
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: 2023-09-19
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking 2 Medicare enrollment records; no due dates published yet.
Enrollment records
2
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 |
|---|---|---|---|---|
| I20130909000318 | I | Internal Medicine | IN | TBD |
| I20230919002549 | I | Hospitalist | OH | 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 |
|---|---|---|---|---|
| 99232 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 143 | 99 | $0 |
| 99239 | Hospital discharge day management, more than 30 minutes | 136 | 130 | $0 |
| 99223 | Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 120 | 112 | $0 |
| 99233 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 103 | 75 | $0 |
| 99222 | Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 32 | 32 | $0 |
Insurance plans in this area (ZIP 46410)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Nurse Practitioner | IL | |
| Physician Assistant | OH | |
| Nurse Practitioner | CA | |
| Nurse Practitioner | IN | |
| Internal Medicine | IN | |
| P S Y C H I A T R Y | IN | |
| Internal Medicine | IN | |
| Internal Medicine | OH | |
| Nurse Practitioner | VA | |
| Internal Medicine | IN |
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