DR. MARK DOUGLAS GARWOOD (M.D.) – Sleep Medicine (Psychiatry & Neurology) Physician, NPI 1144231077
Sleep Medicine (Psychiatry & Neurology) Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
153 SLEEP MEDICINE in MI
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Provider Addresses for DR. MARK DOUGLAS GARWOOD (M.D.)
South State Street, Ann Arbor, Washtenaw County, Michigan, 48108-1774, United States
ANN ARBOR, MI 481081633
Phone: (734) 647-5299
Type: Mailing
Mott Children's Hospital and Von Voigtlander Women's Hospital, 1500, East Medical Center Drive, Ann Arbor, Washtenaw County, Michigan, 48109, United States
ANN ARBOR, MI 481095000
Phone: (734) 936-4000
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: 2006-11-09
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 |
|---|---|---|---|---|
| I20061109000444 | I | Sleep Medicine | MI | 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 |
|---|---|---|---|---|
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 63 | 62 | $0 |
| 99204 | New patient office or other outpatient visit, 45-59 minutes | 47 | 47 | $0 |
| 95811 | Sleep study in sleep lab with continuous airway pressure (6 years or older) | 41 | 41 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 36 | 36 | $0 |
| 95810 | Sleep study in sleep lab (6 years or older) | 32 | 32 | $0 |
Insurance plans in this area (ZIP 48108)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| G A S T R O E N T E R O L O G Y | FL | |
| Physical Medicine And Rehabilitation | MI | |
| A N E S T H E S I O L O G Y | MI | |
| Internal Medicine, Pediatric Medicine | IL | |
| - | MI | |
| Physician Assistant | MI |
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