Doctor profile · Federal record
Dr. Marie Hollenhorst, MD, PHD
Hematology (Internal Medicine) Physician (CMS: Hematology) · Internal Medicine Physician · Boston, MA
- NPI 1497193999
- Accepts Medicare
- 13 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
75 Francis St
Boston, MA 021156110
(617) 732-5500 - Additional location
-
55 Fruit St
Boston, MA 021142621
(617) 732-5190
Credentials & registration
- NPI registered
- June 2013 — 13 yrs on file
- Profile last updated
- February 11, 2026
- Year of graduation
- 2013 — 13 yrs since
- Specialty taxonomy
- 207RH0000X — NUCC code
- State license (1)
- Massachusetts #262787
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1497193999. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
14
Distinct HCPCS
1
Medicare allowed
$2,628
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99223 |
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 14 | 13 | $188 |
In context: peer comparison
Among 26 peers in this city , average services per provider: 95. This provider delivers 0.1× the peer median.Hospital affiliations
Frequently asked questions
What is Dr. Marie Hollenhorst's medical specialty?
Dr. Marie Hollenhorst practices Hematology (Internal Medicine) Physician in Boston, MA.
Where does Dr. Marie Hollenhorst practice?
Dr. Marie Hollenhorst practices at 75 Francis St, Boston, MA 021156110. Office phone: 6177325500.
What is Dr. Marie Hollenhorst's NPI?
Dr. Marie Hollenhorst's National Provider Identifier (NPI) is 1497193999, issued by NPPES.
Does Dr. Marie Hollenhorst accept Medicare assignment?
Yes. Dr. Marie Hollenhorst accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Marie Hollenhorst 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.