Doctor profile · Federal record

Dr. Joaquin Castillo Marroquin, DO

Emergency Medicine Physician (CMS: Emergency Medicine) · Student in an Organized Health Care Education/Training Program · Corona, CA

  • NPI 1316407323
  • Accepts Medicare
  • 7 yrs in practice
  • Male
  • Group practice
  • No sanctions

Practice & contact

NPPES Updated May 11, 2026
Primary practice
800 S Main St
Corona, CA 928823420
(951) 737-4343
Mailing address
13533 New Haven Dr
Moreno Valley, CA 925533408

Credentials & registration

NPPES · NUCC
NPI registered
March 2019 — 7 yrs on file
Profile last updated
July 10, 2023
Year of graduation
2019 — 7 yrs since
Specialty taxonomy
207P00000X — NUCC code
State license (1)
California #202A20916

Federal sanctions & exclusions

OIG LEIE Updated May 11, 2026

No sanctions, exclusions or revocations on file

Checked against OIG LEIE on NPI 1316407323. Last verified May 11, 2026.

Medicare procedures · 2023

Top services delivered

CMS Provider Utilization
Total services
163
Distinct HCPCS
4
Medicare allowed
$23,245
HCPCS Description Services Patients Avg allowed
99285 Emergency department visit with high level of medical decision making 81 80 $178
93010 Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only 30 30 $8
99284 Emergency department visit with moderate level of medical decision making 29 27 $123
99291 Critical care, first 30-74 minutes 23 23 $217

In context: peer comparison

Among 6 peers in this city , average services per provider: 113. This provider delivers 1.4× the peer median.

Medicare Part D · 2023

Top prescriptions

CMS Part D Prescriber
Total claims
24
Patients
24
Total drug cost
$756
Drug Type Claims Patients Total cost
Cefpodoxime Proxetil Generic 12 12 $721
Ibuprofen Generic 12 12 $34

Hospital affiliations

CMS Hospital Compare

Frequently asked questions

Auto-generated from federal data
What is Dr. Joaquin Castillo Marroquin's medical specialty?
Dr. Joaquin Castillo Marroquin practices Emergency Medicine Physician in Corona, CA.
Where does Dr. Joaquin Castillo Marroquin practice?
Dr. Joaquin Castillo Marroquin practices at 800 S Main St, Corona, CA 928823420. Office phone: 9517374343.
What is Dr. Joaquin Castillo Marroquin's NPI?
Dr. Joaquin Castillo Marroquin's National Provider Identifier (NPI) is 1316407323, issued by NPPES.
Does Dr. Joaquin Castillo Marroquin accept Medicare assignment?
Yes. Dr. Joaquin Castillo Marroquin accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Joaquin Castillo Marroquin commonly perform?
Top Medicare-reported procedures in 2023: Emergency department visit with high level of medical decision making (HCPCS 99285); Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (HCPCS 93010); Emergency department visit with moderate level of medical decision making (HCPCS 99284). Source: CMS Medicare Physician & Other Practitioners file.