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Dr. Fidel E. Castillo, MD

(Dr. Fidel E. Castillo Diaz, MD)

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Specializes in: Internal Medicine (Adult Medicine) and Geriatrics (Elderly Care)

Autonomous University of Central America

Professional interests include: elder care

2600 S. Michigan Avenue Suite 100
Chicago, IL 60616

(312) 492-0025

Dr. Fidel E. Castillo, MD is an internist in Marion, IL specializing in internal medicine (adult medicine) and geriatrics (elderly care). He graduated from Autonomous University of Central America. Dr. Fidel E. Castillo, MD is affiliated with U.S. Department of Veterans Affairs and University of Illinois Hospital and Health Sciences System.

Office Locations

2401 West Main Street Marion Vamc (609)
Marion, IL 62959

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University of Illinois Hospital and Health Sciences System

2600 S. Michigan Avenue Suite 100
Chicago, IL 60616

(312) 492-0025

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840 S Wood Street M
Chicago, IL 60612

(312) 996-7704

(312) 413-8283

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Noteworthy Medicare Patient Procedures Performed by Dr. Fidel E. Castillo, MD in 2024

Click on any procedure below to see further details on volume and pricing among Medicare patients.

Top 10%

By Affordability:

In 2024, Dr. Fidel E. Castillo, MD had a list price for flu shot, flu vaccine, immunization (preventive vaccines), and vaccines that was lower than the list prices billed to Medicare by 90% of providers in related specialties within Illinois. Actual amounts paid by patients can vary widely depending on a number of factors, including insurance coverage. A lower list price, however, might mean lower fees when paying without insurance.

Top 25%

By Affordability:

blood draw

blood draw for lab tests

phlebotomy for lab tests

preventive care

venipuncture

In 2012, Dr. Fidel E. Castillo, MD had a list price for blood draw, blood draw for lab tests, phlebotomy for lab tests, preventive care, and venipuncture (phlebotomy) that was lower than the list prices billed to Medicare by 75% of providers in related specialties within Illinois. Actual amounts paid by patients can vary widely depending on a number of factors, including insurance coverage. A lower list price, however, might mean lower fees when paying without insurance.

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

Volume of procedures performed by Dr. Fidel E. Castillo, MD for Medicare patients.

doctor visit	148

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

Volume of procedures performed by Dr. Fidel E. Castillo, MD for Medicare patients.

doctor visit	258

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Fidel E. Castillo, MD.

**Gender**
Male	40
Female	84

**Ethnicity**
Non-Hispanic White	0
Black	60
Hispanic	53
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	33
From 75 to 84	66
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Fidel E. Castillo, MD in 2013

Hypertension	75
High Cholesterol	60
Stroke	11
Ischemic Heart Disease	53
Depression	24
Chronic Kidney Disease	31
Asthma	11
Osteoperosis	27
Atrial Fibrilation	11
Heart Failure	35
Chronic Obstructive Pulmonary Disease	21
Diabetes	53
Dementia	27
Cancer	0

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

Volume of procedures performed by Dr. Fidel E. Castillo, MD for Medicare patients.

doctor visit	291

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Fidel E. Castillo, MD.

**Gender**
Male	40
Female	95

**Ethnicity**
Non-Hispanic White	0
Black	0
Hispanic	66
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	0
From 75 to 84	70
85 and over	33
Less than 65	0

Conditions of Medicare patients treated by Dr. Fidel E. Castillo, MD in 2014

Hypertension	75
High Cholesterol	56
Stroke	9
Ischemic Heart Disease	45
Depression	23
Chronic Kidney Disease	30
Asthma	0
Osteoperosis	16
Atrial Fibrilation	0
Heart Failure	33
Chronic Obstructive Pulmonary Disease	13
Diabetes	52
Dementia	30
Cancer	0

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

Volume of procedures performed by Dr. Fidel E. Castillo, MD for Medicare patients.

doctor visit	200

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Fidel E. Castillo, MD.

**Gender**
Male	58
Female	122

**Ethnicity**
Non-Hispanic White	0
Black	0
Hispanic	106
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	42
From 75 to 84	86
85 and over	52
Less than 65	0

Conditions of Medicare patients treated by Dr. Fidel E. Castillo, MD in 2015

Hypertension	75
High Cholesterol	48
Stroke	0
Ischemic Heart Disease	43
Depression	18
Chronic Kidney Disease	33
Asthma	0
Osteoperosis	19
Atrial Fibrilation	0
Heart Failure	32
Chronic Obstructive Pulmonary Disease	12
Diabetes	62
Dementia	28
Cancer	0

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

Volume of procedures performed by Dr. Fidel E. Castillo, MD for Medicare patients.

doctor visit	196

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Fidel E. Castillo, MD.

**Gender**
Male	32
Female	61

**Ethnicity**
Non-Hispanic White	0
Black	0
Hispanic	52
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	23
From 75 to 84	42
85 and over	28
Less than 65	0

Conditions of Medicare patients treated by Dr. Fidel E. Castillo, MD in 2016

Hypertension	75
High Cholesterol	55
Stroke	0
Ischemic Heart Disease	34
Depression	20
Chronic Kidney Disease	41
Asthma	12
Osteoperosis	20
Atrial Fibrilation	0
Heart Failure	26
Chronic Obstructive Pulmonary Disease	0
Diabetes	63
Dementia	32
Cancer	0

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

Volume of procedures performed by Dr. Fidel E. Castillo, MD for Medicare patients.

doctor visit	177

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Fidel E. Castillo, MD.

**Gender**
Male	28
Female	46

**Ethnicity**
Non-Hispanic White	0
Black	0
Hispanic	42
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	0
From 75 to 84	33
85 and over	21
Less than 65	0

Conditions of Medicare patients treated by Dr. Fidel E. Castillo, MD in 2017

Hypertension	75
High Cholesterol	39
Stroke	0
Ischemic Heart Disease	32
Depression	22
Chronic Kidney Disease	51
Asthma	0
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	22
Chronic Obstructive Pulmonary Disease	0
Diabetes	64
Dementia	36
Cancer	0

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

Volume of procedures performed by Dr. Fidel E. Castillo, MD for Medicare patients.

doctor visit	147

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Fidel E. Castillo, MD.

**Gender**
Male	21
Female	38

**Ethnicity**
Non-Hispanic White	0
Black	0
Hispanic	37
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	11
From 75 to 84	27
85 and over	21
Less than 65	0

Conditions of Medicare patients treated by Dr. Fidel E. Castillo, MD in 2018

Hypertension	75
High Cholesterol	34
Stroke	0
Ischemic Heart Disease	32
Depression	0
Chronic Kidney Disease	46
Asthma	0
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	22
Chronic Obstructive Pulmonary Disease	0
Diabetes	63
Dementia	32
Cancer	0

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

Volume of procedures performed by Dr. Fidel E. Castillo, MD for Medicare patients.

doctor visit	144

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Fidel E. Castillo, MD.

**Gender**
Male	21
Female	31

**Ethnicity**
Non-Hispanic White	0
Black	0
Hispanic	30
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	0
From 75 to 84	0
85 and over	22
Less than 65	0

Conditions of Medicare patients treated by Dr. Fidel E. Castillo, MD in 2019

Hypertension	75
High Cholesterol	27
Stroke	0
Ischemic Heart Disease	40
Depression	0
Chronic Kidney Disease	56
Asthma	0
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	23
Chronic Obstructive Pulmonary Disease	0
Diabetes	54
Dementia	29
Cancer	0

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Fidel E. Castillo, MD treated as an internist in Marion, IL during 2020 were blood draw.

Volume of procedures performed by Dr. Fidel E. Castillo, MD for Medicare patients.

blood draw	24
doctor visit	58

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Fidel E. Castillo, MD.

**Gender**
Male	20
Female	30

**Ethnicity**
Non-Hispanic White	0
Black	0
Hispanic	35
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	0
From 75 to 84	0
85 and over	21
Less than 65	0

Conditions of Medicare patients treated by Dr. Fidel E. Castillo, MD in 2020

Hypertension	72
High Cholesterol	0
Stroke	0
Ischemic Heart Disease	30
Depression	0
Chronic Kidney Disease	52
Asthma	0
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	58
Dementia	30
Cancer	0

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Fidel E. Castillo, MD treated as an internist in Marion, IL during 2021 were blood draw, lab tests, preventive care and diabetes management.

Volume of procedures performed by Dr. Fidel E. Castillo, MD for Medicare patients.

blood draw	44
diabetes management	24
doctor visit	90
lab tests	24
preventive care	24

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Fidel E. Castillo, MD.

**Gender**
Male	17
Female	31

**Ethnicity**
Non-Hispanic White	0
Black	0
Hispanic	30
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	0
From 75 to 84	0
85 and over	21
Less than 65	0

Conditions of Medicare patients treated by Dr. Fidel E. Castillo, MD in 2021

Hypertension	75
High Cholesterol	25
Stroke	0
Ischemic Heart Disease	40
Depression	0
Chronic Kidney Disease	40
Asthma	0
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	33
Chronic Obstructive Pulmonary Disease	0
Diabetes	58
Dementia	38
Cancer	0

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Fidel E. Castillo, MD treated as an internist in Marion, IL during 2022 were blood draw, lab tests, preventive care and diabetes management.

Volume of procedures performed by Dr. Fidel E. Castillo, MD for Medicare patients.

blood draw	35
diabetes management	31
doctor visit	83
lab tests	31
preventive care	31

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Fidel E. Castillo, MD.

**Gender**
Male	12
Female	29

**Ethnicity**
Non-Hispanic White	0
Black	0
Hispanic	22
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	0
From 75 to 84	0
85 and over	22
Less than 65	0

Conditions of Medicare patients treated by Dr. Fidel E. Castillo, MD in 2022

Hypertension	75
High Cholesterol	39
Stroke	0
Ischemic Heart Disease	27
Depression	0
Chronic Kidney Disease	27
Asthma	0
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	44
Chronic Obstructive Pulmonary Disease	0
Diabetes	49
Dementia	39
Cancer	0

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

The top procedures that Dr. Fidel E. Castillo, MD treated as an internist in Marion, IL during 2023 were blood draw, lab tests, preventive care and diabetes management.

Volume of procedures performed by Dr. Fidel E. Castillo, MD for Medicare patients.

blood draw	39
diabetes management	31
doctor visit	66
lab tests	31
preventive care	31

2023 Medicare Patient Data

Information about Medicare patients treated by Dr. Fidel E. Castillo, MD.

**Gender**
Male	18
Female	24

**Ethnicity**
Non-Hispanic White	0
Black	0
Hispanic	22
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	0
From 75 to 84	0
85 and over	20
Less than 65	0

Conditions of Medicare patients treated by Dr. Fidel E. Castillo, MD in 2023

Hypertension	75
High Cholesterol	45
Stroke	0
Ischemic Heart Disease	0
Depression	0
Chronic Kidney Disease	0
Asthma	0
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	31
Chronic Obstructive Pulmonary Disease	26
Diabetes	52
Dementia	31
Cancer	0

Medicare Procedure and Patient Information

2024 Medicare Procedure Volume

The top procedures that Dr. Fidel E. Castillo, MD treated as an internist in Marion, IL during 2024 were preventive care, blood draw, lab tests and diabetes management.

Volume of procedures performed by Dr. Fidel E. Castillo, MD for Medicare patients.

blood draw	42
diabetes management	36
doctor visit	68
lab tests	36
preventive care	47
vaccines	11

2024 Medicare Patient Data

Information about Medicare patients treated by Dr. Fidel E. Castillo, MD.

**Gender**
Male	11
Female	17

**Age**
From 65 to 74	0
From 75 to 84	0
85 and over	16
Less than 65	0

Conditions of Medicare patients treated by Dr. Fidel E. Castillo, MD in 2024

Hypertension	75
High Cholesterol	39
Stroke	0
Ischemic Heart Disease	0
Depression	0
Chronic Kidney Disease	0
Asthma	0
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	64
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2024

Volume of procedures performed by Dr. Fidel E. Castillo, MD for Medicare patients.

The highest averages for the top procedures that Dr. Fidel E. Castillo, MD treated as an internist in Marion, IL were blood draw, preventive care, lab tests and diabetes management.

blood draw	36
diabetes management	30
doctor visit	148
lab tests	30
preventive care	33
vaccines	11

Average Medicare Patient Data From 2012 - 2024

Information about Medicare patients treated by Dr. Fidel E. Castillo, MD.

**Gender**
Male	24
Female	46

**Ethnicity**
Black / African American	4
Asian / Pacific Islander	0
Non-Hispanic White	0
Native American / Alaskan Native	0
Hispanic	38
Other	0

**Age**
75 to 84	24
85 and over	21
Less than 65	0
65 to 74	8

Average of Total of Conditions of Medicare patients treated by Dr. Fidel E. Castillo, MD From 2012 - 2024

The highest averages of the most common conditions of Medicare patients that Dr. Fidel E. Castillo, MD treated were hypertension, diabetes, high cholesterol and chronic kidney disease.

Hypertension	69
High Cholesterol	35
Stroke	1
Ischemic Heart Disease	28
Depression	8
Chronic Kidney Disease	31
Asthma	1
Osteoporosis	6
Heart Failure	23
Chronic Obstructive Pulmonary Disease	5
Diabetes	53
Atrial Fibrillation	0
Cancer	0
Dementia	27

Education & Training

Dr. Fidel E. Castillo, MD graduated from Autonomous University of Central America. He completed residency at San Juan Municipal Hospital. He is certified by the Board Certification: Internal Medicine and has a state license in Illinois.

Medical School: Autonomous University of Central America

Residency: San Juan Municipal Hospital

Board Certification: Board Certification: Internal Medicine

Licensed In: Illinois

Affiliations & Hospitals

Dr. Fidel E. Castillo, MD is associated with these hospitals and organizations:

U.S. Department of Veterans Affairs

University of Illinois Hospital and Health Sciences System

Ratings & Reviews

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Biography

Dr. Fidel Castillo's specialty is geriatrics (elderly care). Dr. Castillo's areas of expertise include internal medicine and elder care. He graduated from Autonomous University of Central America and then he performed his residency at San Juan Municipal Hospital. In addition to English, he speaks Spanish. Dr. Castillo is professionally affiliated with the University of Illinois Hospital and Health Sciences System and U.S. Department of Veterans Affairs.