Doctor profile · Federal record
Dr. Mary Piechowiak, MD
Internal Medicine Physician (CMS: Hospitalist) · Internal Medicine Physician · Falls Church, VA
- NPI 1033603824
- Accepts Medicare
- 8 yrs in practice
- Licensed in 2 states
- Female
- Group practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
3300 Gallows RD
Falls Church, VA 220423307
(703) 776-4001
fax (703) 776-7113 - Additional location
-
1600 N Rose Ave
Oxnard, CA 930303722
(805) 988-2505 - Mailing address
-
Po Box 37174
Baltimore, MD 212973174
Credentials & registration
- NPI registered
- June 2018 — 8 yrs on file
- Profile last updated
- March 24, 2023
- Year of graduation
- 2018 — 8 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State licenses (2)
- California #A173484 · Virginia #0101277234
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1033603824. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
481
Distinct HCPCS
5
Medicare allowed
$58,495
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99233 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 229 | 104 | $125 | |
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 121 | 56 | $85 | |
99223 |
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 53 | 50 | $182 | |
99239 |
Hospital discharge day management, more than 30 minutes | 51 | 51 | $121 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 27 | 23 | $140 |
In context: peer comparison
Among 63 peers in Falls Church Internal Medicine Physician, average services per provider: 131. This provider delivers 3.7× the peer median.Hospital affiliations
Frequently asked questions
What is Dr. Mary Piechowiak's medical specialty?
Dr. Mary Piechowiak practices Internal Medicine Physician in Falls Church, VA.
Where does Dr. Mary Piechowiak practice?
Dr. Mary Piechowiak practices at 3300 Gallows RD, Falls Church, VA 220423307. Office phone: 7037764001.
What is Dr. Mary Piechowiak's NPI?
Dr. Mary Piechowiak's National Provider Identifier (NPI) is 1033603824, issued by NPPES.
Does Dr. Mary Piechowiak accept Medicare assignment?
Yes. Dr. Mary Piechowiak accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Mary Piechowiak commonly perform?
Top Medicare-reported procedures in 2023: Subsequent hospital care with moderate levelof medical decision making (HCPCS 99233); Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232); Initial hospital care with moderate level of medical decision making (HCPCS 99223). Source: CMS Medicare Physician & Other Practitioners file.