Doctor profile · Federal record

Dr. Dimitrios Spentzos, M.D

Medical Oncology Physician (CMS: Medical Oncology) · Boston, MA

  • NPI 1174556120
  • Accepts Medicare
  • 36 yrs in practice
  • Male
  • Solo practice
  • No sanctions

Practice & contact

Operates at 2 locations .

NPPES Updated May 11, 2026
Primary practice
55 Fruit St
Boston, MA 021142621
(617) 724-3144
fax (617) 634-1894
Additional location
330 Brookline Ave, Shapiro Clinical Center 9
Boston, MA 022155400
(617) 667-1910
fax (617) 667-8030
Mailing address
23 Warwick RD
Belmont, MA 024782840

Credentials & registration

NPPES · NUCC
NPI registered
July 2006 — 20 yrs on file
Profile last updated
November 25, 2024
Year of graduation
1990 — 36 yrs since
Specialty taxonomy
207RX0202X — NUCC code
State license (1)
Massachusetts #161220

Federal sanctions & exclusions

OIG LEIE Updated May 11, 2026

No sanctions, exclusions or revocations on file

Checked against OIG LEIE on NPI 1174556120. Last verified May 11, 2026.

Medicare procedures · 2023

Top services delivered

CMS Provider Utilization
Total services
107
Distinct HCPCS
3
Medicare allowed
$14,083
HCPCS Description Services Patients Avg allowed
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 68 26 $126
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 22 21 $184
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 17 12 $84

In context: peer comparison

Among 103 peers in this city , average services per provider: 67. This provider delivers 1.6× the peer median.

Open Payments

Industry payments received

CMS Open Payments
All-time total
$114
Transactions
1
Manufacturers
1
Payer (manufacturer) Industry Txns Amount
Tempus AI, Inc 1 $113.75

By nature of payment

Food and Beverage
$114

Frequently asked questions

Auto-generated from federal data
What is Dr. Dimitrios Spentzos's medical specialty?
Dr. Dimitrios Spentzos practices Medical Oncology Physician in Boston, MA.
Where does Dr. Dimitrios Spentzos practice?
Dr. Dimitrios Spentzos practices at 55 Fruit St, Boston, MA 021142621. Office phone: 6177243144.
What is Dr. Dimitrios Spentzos's NPI?
Dr. Dimitrios Spentzos's National Provider Identifier (NPI) is 1174556120, issued by NPPES.
Does Dr. Dimitrios Spentzos accept Medicare assignment?
Yes. Dr. Dimitrios Spentzos accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Dimitrios Spentzos commonly perform?
Top Medicare-reported procedures in 2023: Subsequent hospital care with moderate levelof medical decision making (HCPCS 99233); Initial hospital care with moderate level of medical decision making (HCPCS 99223); Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232). Source: CMS Medicare Physician & Other Practitioners file.