JOHN FLAKS (D.O.) – Anesthesiology Physician, NPI 1366424939
Anesthesiology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
1,404 ANESTHESIOLOGY in MD
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Provider Addresses for JOHN FLAKS (D.O.)
Creamery Lane, Colonial Heights, Easton, Talbot County, Maryland, 21601, United States
EASTON, MD 216013137
Phone: (410) 819-0710
Fax: (410) 819-0712
Type: Mailing
MedStar Harbor Hospital, 3001, South Hanover Street, Baltimore, Maryland, 21225, United States
BALTIMORE, MD 212251233
Phone: (410) 350-3341
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 1 Open Payments records for all available years, with a total value of $13.
Total Amount is formed as General ($13) + Research ($0) + Ownership ($0) = $13.
Last reported payment date: 2024-11-20 • Largest payer in this snapshot: Madrigal Pharmaceuticals ($13).
Total Amount
$13
General + Research + Ownership
Payments
1
Total payment records
General Amount
$13
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-11-20
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Madrigal Pharmaceuticals | $13 |
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: 2008-12-04
PECOS data refreshed: 2026-06-15
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 |
|---|---|---|---|---|
| I20040624000980 | I | Anesthesiology | MD | TBD |
| I20081204000713 | I | Anesthesiology | DC | 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 |
|---|---|---|---|---|
| 01630 | Anesthesia for other procedure on top of arm bone and shoulder joint | 38 | 38 | $0 |
| 01480 | Anesthesia for other procedure on lower leg, ankle, and foot bones | 29 | 27 | $0 |
| 64447 | Injection of anesthetic agent and/or steroid into thigh nerve (femoral nerve) | 21 | 21 | $0 |
| 64415 | Injection of anesthetic agent and/or steroid into arm nerve bundle (brachial plexus) | 21 | 20 | $0 |
| 01402 | Anesthesia for procedure for total knee joint replacement | 18 | 18 | $0 |
Insurance plans in this area (ZIP 21601)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Certified Registered Nurse Anesthetist (Crna) | MD | |
| Certified Registered Nurse Anesthetist (Crna) | CA | |
| Certified Registered Nurse Anesthetist (Crna) | NY | |
| Certified Registered Nurse Anesthetist (Crna) | MD | |
| Certified Registered Nurse Anesthetist (Crna) | MD | |
| Certified Registered Nurse Anesthetist (Crna) | MD | |
| Certified Registered Nurse Anesthetist (Crna) | DE | |
| Certified Registered Nurse Anesthetist (Crna) | DC | |
| Certified Registered Nurse Anesthetist (Crna) | MD | |
| A N E S T H E S I O L O G Y | MD |
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