Doctor profile · Federal record
Dr. Rex Smith, MD PHD
Immunopathology Physician (CMS: Pathology) · Anatomic Pathology & Clinical Pathology Physician · Boston, MA
- NPI 1801870910
- Accepts Medicare
- 34 yrs in practice
- Male
- No sanctions
Practice & contact
- Primary practice
-
55 Fruit Street, Wrn 2 Pathology Associates
Boston, MA 021142696
(617) 726-1835
fax (617) 726-2365 - Mailing address
-
Po Box 9142, Mass General Physician Organization
Charlestown, MA 021299142
Credentials & registration
- NPI registered
- December 2005 — 21 yrs on file
- Profile last updated
- September 11, 2025
- Year of graduation
- 1992 — 34 yrs since
- Specialty taxonomy
- 207ZI0100X — NUCC code
- State license (1)
- Massachusetts #150072
- Medicaid
- MA #3156630
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1801870910. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
1,215
Distinct HCPCS
10
Medicare allowed
$40,040
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
88350 |
Antibody evaluation, each additional single antibody stain procedure | 300 | 35 | $30 | |
88313 |
Special stained specimen slides to examine tissue including interpretation and report | 185 | 71 | $12 | |
88305 |
Pathology examination of tissue using a microscope, intermediate complexity | 153 | 128 | $39 | |
88346 |
Antibody evaluation, initial single antibody stain procedure | 149 | 120 | $38 | |
88341 |
Special stained specimen slides to examine tissue, each additional procedure | 72 | 18 | $26 | |
88307 |
Pathology examination of tissue using a microscope, moderately high complexity | 66 | 48 | $87 | |
88312 |
Special stained specimen slides to identify organisms including interpretation and report | 57 | 17 | $28 | |
88304 |
Pathology examination of tissue using a microscope, moderately low complexity | 52 | 47 | $12 | |
88311 |
Preparation of tissue for examination by removing any calcium present | 48 | 43 | $13 | |
84181 |
Protein measurement | 47 | 44 | $19 |
In context: peer comparison
Among 1 peers in Boston Immunopathology Physician, average services per provider: 93. This provider delivers 13× the peer median.Hospital affiliations
Frequently asked questions
What is Dr. Rex Smith's medical specialty?
Dr. Rex Smith practices Immunopathology Physician in Boston, MA.
Where does Dr. Rex Smith practice?
Dr. Rex Smith practices at 55 Fruit Street, Boston, MA 021142696. Office phone: 6177261835.
What is Dr. Rex Smith's NPI?
Dr. Rex Smith's National Provider Identifier (NPI) is 1801870910, issued by NPPES.
Does Dr. Rex Smith accept Medicare assignment?
Yes. Dr. Rex Smith accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Rex Smith commonly perform?
Top Medicare-reported procedures in 2023: Antibody evaluation, each additional single antibody stain procedure (HCPCS 88350); Special stained specimen slides to examine tissue including interpretation and report (HCPCS 88313); Pathology examination of tissue using a microscope, intermediate complexity (HCPCS 88305). Source: CMS Medicare Physician & Other Practitioners file.