Doctor profile · Federal record
Dr. John Flaks, D.O.
Anesthesiology Physician (CMS: Anesthesiology) · Baltimore, MD
- NPI 1366424939
- Accepts Medicare
- 26 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
3001 S Hanover St
Baltimore, MD 212251233
(410) 350-3341 - Mailing address
-
29 Creamery Ln
Easton, MD 216013137
Credentials & registration
- NPI registered
- November 2005 — 21 yrs on file
- Profile last updated
- October 17, 2008
- Year of graduation
- 2000 — 26 yrs since
- Specialty taxonomy
- 207L00000X — NUCC code
- State license (1)
- Maryland #H0059599
- Medicaid
- MD #404715000
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1366424939. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
172
Distinct HCPCS
9
Medicare allowed
$18,818
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
01630 |
Anesthesia for other procedure on top of arm bone and shoulder joint | 38 | 38 | $134 | |
01480 |
Anesthesia for other procedure on lower leg, ankle, and foot bones | 29 | 27 | $102 | |
64415 |
Injection of anesthetic agent and/or steroid into arm nerve bundle (brachial plexus) | 21 | 20 | $70 | |
64447 |
Injection of anesthetic agent and/or steroid into thigh nerve (femoral nerve) | 21 | 21 | $48 | |
01402 |
Anesthesia for procedure for total knee joint replacement | 18 | 18 | $195 | |
01400 |
Anesthesia for other procedure or exam of knee joint using an endoscope | 12 | 12 | $128 | |
01214 |
Anesthesia for total hip replacement | 11 | 11 | $188 | |
64445 |
Injection of anesthetic agent and/or steroid into lower back and leg nerve (sciatic nerve) | 11 | 11 | $77 | |
64999 |
Other procedure on nervous system | 11 | 11 | $28 |
In context: peer comparison
Among 149 peers in Baltimore Anesthesiology Physician, average services per provider: 29. This provider delivers 5.9× the peer median.Open Payments
Industry payments received
All-time total
$13
Transactions
1
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Madrigal Pharmaceuticals | 1 | $13.25 |
By nature of payment
Frequently asked questions
What is Dr. John Flaks's medical specialty?
Dr. John Flaks practices Anesthesiology Physician in Baltimore, MD.
Where does Dr. John Flaks practice?
Dr. John Flaks practices at 3001 S Hanover St, Baltimore, MD 212251233. Office phone: 4103503341.
What is Dr. John Flaks's NPI?
Dr. John Flaks's National Provider Identifier (NPI) is 1366424939, issued by NPPES.
Does Dr. John Flaks accept Medicare assignment?
Yes. Dr. John Flaks accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. John Flaks commonly perform?
Top Medicare-reported procedures in 2023: Anesthesia for other procedure on top of arm bone and shoulder joint (HCPCS 01630); Anesthesia for other procedure on lower leg, ankle, and foot bones (HCPCS 01480); Injection of anesthetic agent and/or steroid into arm nerve bundle (brachial plexus) (HCPCS 64415). Source: CMS Medicare Physician & Other Practitioners file.