DR. MARK EVANS FLEMING (DO) – Orthopaedic Surgery Physician, NPI 1881638583
Orthopaedic Surgery Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
712 ORTHOPEDIC SURGERY in MD
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Provider Addresses for DR. MARK EVANS FLEMING (DO)
Walter Reed National Military Medical Center, 8901, Rockville Pike, Glenbrook, Maplewood, Bethesda, Montgomery County, Maryland, 20889, United States
NATIONAL NAVAL MEDICAL CENTER
BETHESDA, MD 208895600
Phone: (301) 245-0726
Type: Location
18523 Corwin Rd Ste A
Apple Valley, CA 923072300
Phone: (909) 712-2764
Fax: (909) 752-8719
Type: Location
225 S GRAND AVE APT 1801
LOS ANGELES, CA 900124433
Phone: (301) 956-0583
Type: Mailing
1200 N STATE ST
LOS ANGELES, CA 900891001
Phone: (301) 956-0583
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 10 Open Payments records for all available years, with a total value of $5,519.
Total Amount is formed as General ($5,519) + Research ($0) + Ownership ($0) = $5,519.
Last reported payment date: 2023-10-07 • Largest payer in this snapshot: Synthes GmbH ($5,474).
Total Amount
$5,519
General + Research + Ownership
Payments
10
Total payment records
General Amount
$5,519
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2023-10-07
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Synthes GmbH | $5,474 |
| Stryker Corporation | $45 |
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: 2022-01-06
PECOS data refreshed: 2026-06-15
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 |
|---|---|---|---|---|
| I20220106002693 | I | Orthopedic Surgery | MA | 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 | 72 | 45 | $0 |
| 99222 | Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 14 | 14 | $0 |
| 99203 | New patient office or other outpatient visit, 30-44 minutes | 13 | 13 | $0 |
Insurance plans in this area (ZIP 20889)
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