Doctor profile · Federal record

Dr. Benjamin Cahan, M.D.

Radiation Oncology Physician (CMS: Radiation Oncology) · South Pasadena, CA

  • NPI 1396034229
  • Accepts Medicare
  • MIPS 91.9 / 100 · 2023
  • 15 yrs in practice
  • Male
  • Solo practice
  • No sanctions

Practice & contact

Operates at 4 locations .

NPPES Updated May 11, 2026
Primary practice
209 Fair Oaks Ave
South Pasadena, CA 910301814
(626) 396-2900
Additional location
15031 Rinaldi St Ste 100
Mission Hills, CA 913451207
(818) 496-4410
fax (818) 496-4758
Additional location
26357 McBean Pkwy Ste 150
Santa Clarita, CA 913554493
(661) 259-2990
fax (661) 259-1031
Show 1 more location
Additional location
44151 15Th St W Ste 101
Lancaster, CA 935344079
(661) 902-5600
fax (661) 951-0686
Mailing address
Po Box 512185
Los Angeles, CA 900510185

Credentials & registration

NPPES · NUCC
NPI registered
March 2011 — 15 yrs on file
Profile last updated
June 8, 2022
Year of graduation
2011 — 15 yrs since
Specialty taxonomy
2085R0001X — NUCC code
State license (1)
California #A123974

Federal sanctions & exclusions

OIG LEIE Updated May 11, 2026

No sanctions, exclusions or revocations on file

Checked against OIG LEIE on NPI 1396034229. Last verified May 11, 2026.

Medicare procedures · 2023

Top services delivered

CMS Provider Utilization
Total services
2,813
Distinct HCPCS
10
Medicare allowed
$657,026
HCPCS Description Services Patients Avg allowed
77014 Ct guidance for insertion of radiation therapy fields 555 40 $138
G6015 Intensity modulated treatment delivery, single or multiple fields/arcs,via narrow spatially and temporally modulated beams, binary, dynamic mlc, per treatment session 503 35 $425
G6012 Radiation treatment delivery,3 or more separate treatment areas, custom blocking, tangential ports, wedges, rotational beam, compensators, electron beam; 6-10 mev 209 18 $278
G6002 Stereoscopic x-ray guidance for localization of target volume for the delivery of radiation therapy 196 22 $86
77336 Continuing radiation therapy consultation per week 194 60 $101
77427 Radiation treatment management, 5 treatment sessions 191 52 $205
77300 Calculation of radiation therapy dose 186 51 $74
77334 Design and construction of complex radiation treatment device 128 50 $141
G6013 Radiation treatment delivery,3 or more separate treatment areas, custom blocking, tangential ports, wedges, rotational beam, compensators, electron beam; 11-19 mev 108 16 $278
99205 New patient office or other outpatient visit, 60-74 minutes 56 56 $232

In context: peer comparison

Among 2 peers in South Pasadena Radiation Oncology Physician, average services per provider: 156. This provider delivers 18× the peer median.

Open Payments

Industry payments received

CMS Open Payments
All-time total
$18
Transactions
1
Manufacturers
1
Payer (manufacturer) Industry Txns Amount
Ambu INC. 1 $17.82

By nature of payment

Food and Beverage
$18

Medicare Part D · 2023

Top prescriptions

CMS Part D Prescriber
Total claims
57
Patients
12
Total drug cost
$634
Drug Type Claims Patients Total cost
Tamsulosin Hcl Generic 31 12 $389
Hydrocodone-Acetaminophen (Hydrocodone/Acetaminophen) Brand 14 0 $141
Diphenoxylate-Atropine (Diphenoxylate Hcl/Atropine) Brand 12 0 $105

Frequently asked questions

Auto-generated from federal data
What is Dr. Benjamin Cahan's medical specialty?
Dr. Benjamin Cahan practices Radiation Oncology Physician in South Pasadena, CA.
Where does Dr. Benjamin Cahan practice?
Dr. Benjamin Cahan practices at 209 Fair Oaks Ave, South Pasadena, CA 910301814. Office phone: 6263962900.
What is Dr. Benjamin Cahan's NPI?
Dr. Benjamin Cahan's National Provider Identifier (NPI) is 1396034229, issued by NPPES.
Does Dr. Benjamin Cahan accept Medicare assignment?
Yes. Dr. Benjamin Cahan accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Benjamin Cahan commonly perform?
Top Medicare-reported procedures in 2023: Ct guidance for insertion of radiation therapy fields (HCPCS 77014); Intensity modulated treatment delivery, single or multiple fields/arcs,via narrow spatially and temporally modulated beams, binary, dynamic mlc (HCPCS G6015); Radiation treatment delivery,3 or more separate treatment areas, custom blocking, tangential ports, wedges, rotational beam, compensators, electron beam; 6-10 mev (HCPCS G6012). Source: CMS Medicare Physician & Other Practitioners file.