Doctor profile · Federal record
Dr. Gunnlaugur Nielsen, MD
Anatomic Pathology Physician (CMS: Pathology) · Boston, MA
- NPI 1174592653
- Accepts Medicare
- 38 yrs in practice
- Male
- No sanctions
Practice & contact
- Primary practice
-
55 Fruit St Wrn 2, Pathology Associates
Boston, MA 021142696
(617) 724-1469
fax (617) 726-9312 - Mailing address
-
Po Box 9142, Mass General Physician Organization
Charlestown, MA 021299142
Credentials & registration
- NPI registered
- March 2006 — 20 yrs on file
- Profile last updated
- July 8, 2007
- Year of graduation
- 1988 — 38 yrs since
- Specialty taxonomy
- 207ZP0101X — NUCC code
- State license (1)
- Massachusetts #78780
- Medicaid
- MA #3124584
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1174592653. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
2,247
Distinct HCPCS
10
Medicare allowed
$82,556
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
88311 |
Preparation of tissue for examination by removing any calcium present | 543 | 491 | $13 | |
88305 |
Pathology examination of tissue using a microscope, intermediate complexity | 411 | 370 | $39 | |
88341 |
Special stained specimen slides to examine tissue, each additional procedure | 298 | 74 | $30 | |
88304 |
Pathology examination of tissue using a microscope, moderately low complexity | 267 | 249 | $12 | |
88307 |
Pathology examination of tissue using a microscope, moderately high complexity | 243 | 188 | $87 | |
88331 |
Pathology examination of specimen during surgery, first tissue block | 195 | 130 | $65 | |
88342 |
Special stained specimen slides to examine tissue, initial procedure | 100 | 88 | $36 | |
88332 |
Pathology examination of specimen during surgery, each additional tissue block | 54 | 30 | $32 | |
88360 |
Microscopic genetic analysis of tumor, manual | 39 | 17 | $44 | |
88321 |
Surgical pathology consultation and report on referred slides prepared elsewhere | 35 | 35 | $89 |
In context: peer comparison
Among 57 peers in Boston Anatomic Pathology Physician, average services per provider: 159. This provider delivers 14× the peer median.Frequently asked questions
What is Dr. Gunnlaugur Nielsen's medical specialty?
Dr. Gunnlaugur Nielsen practices Anatomic Pathology Physician in Boston, MA.
Where does Dr. Gunnlaugur Nielsen practice?
Dr. Gunnlaugur Nielsen practices at 55 Fruit St Wrn 2, Boston, MA 021142696. Office phone: 6177241469.
What is Dr. Gunnlaugur Nielsen's NPI?
Dr. Gunnlaugur Nielsen's National Provider Identifier (NPI) is 1174592653, issued by NPPES.
Does Dr. Gunnlaugur Nielsen accept Medicare assignment?
Yes. Dr. Gunnlaugur Nielsen accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Gunnlaugur Nielsen commonly perform?
Top Medicare-reported procedures in 2023: Preparation of tissue for examination by removing any calcium present (HCPCS 88311); Pathology examination of tissue using a microscope, intermediate complexity (HCPCS 88305); Special stained specimen slides to examine tissue, each additional procedure (HCPCS 88341). Source: CMS Medicare Physician & Other Practitioners file.