Doctor profile · Federal record
Dr. Timothy Niessen, MD, MPH
Internal Medicine Physician (CMS: Internal Medicine) · Baltimore, MD
- NPI 1730322900
- MIPS 74.4 / 100 · 2023
- 17 yrs in practice
- Male
- Solo practice
- No sanctions
Practice & contact
- Primary practice
-
600 N Wolfe St, Nelson 215
Baltimore, MD 212870001
(443) 287-4362
fax (410) 502-0923
Credentials & registration
- NPI registered
- April 2009 — 17 yrs on file
- Profile last updated
- March 11, 2013
- Year of graduation
- 2009 — 17 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- Maryland #D0074245
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1730322900. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
18
Distinct HCPCS
1
Medicare allowed
$3,164
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99223 |
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 18 | 18 | $176 |
In context: peer comparison
Among 363 peers in Baltimore Internal Medicine Physician, average services per provider: 105. This provider delivers 0.2× the peer median.Hospital affiliations
Frequently asked questions
What is Dr. Timothy Niessen's medical specialty?
Dr. Timothy Niessen practices Internal Medicine Physician in Baltimore, MD.
Where does Dr. Timothy Niessen practice?
Dr. Timothy Niessen practices at 600 N Wolfe St, Baltimore, MD 212870001. Office phone: 4432874362.
What is Dr. Timothy Niessen's NPI?
Dr. Timothy Niessen's National Provider Identifier (NPI) is 1730322900, issued by NPPES.
Does Dr. Timothy Niessen accept Medicare assignment?
Dr. Timothy Niessen does not accept Medicare assignment for all services. Patients may be billed amounts beyond Medicare-allowed charges.
What procedures does Dr. Timothy Niessen commonly perform?
Top Medicare-reported procedures in 2023: Initial hospital care with moderate level of medical decision making (HCPCS 99223). Source: CMS Medicare Physician & Other Practitioners file.