DR. FIDEL E CASTILLO DIAZ MD
NPI 1689667347
Internal Medicine - Geriatric Medicine in Chicago, IL

Q: What is Fidel Castillo Diaz's NPI number?

The NPI number for Fidel Castillo Diaz is 1689667347. It was assigned to this individual provider in the NPPES registry on August 29, 2005. The provider is also known as Fidel E Castillo MD.

Q: What is Fidel Castillo Diaz's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Geriatric Medicine, with taxonomy code 207RG0300X.

Active since August 29, 2005PECOS EnrolledAccepts Medicare Assignment

87.08/100

CMS Quality Rating

840 S WOOD ST, M-C 717 CSN 440, CHICAGO, IL 60612(312) 996-7704(312) 413-8283 Get Directions Write a Review

NPPES record last updated: March 5, 2014. Verified against the NPPES registry weekly; last sync: August 09, 2026.

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About Dr. Fidel E Castillo Diaz Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. FIDEL E CASTILLO DIAZ MD (NPI 1689667347) is an individual geriatric medicine provider in Chicago, Illinois, licensed in Illinois (036124066) and active in the NPI registry since August 2005. He is enrolled in Medicare PECOS, is affiliated with University Of Illinois Hospital And Clinics, and is a graduate of Other (1998).

NPPES Registry Identity

NPI1689667347

Entity TypeIndividualMale

Primary Taxonomy207RG0300X

Provider Legal NameDR. FIDEL E CASTILLO DIAZCredential: MD

Location Address840 S WOOD ST, M-C 717 CSN 440Chicago, IL 60612-4325

Mailing Address840 S Wood St, M-c 717 Csn 440Chicago, IL 60612-4325

Phone(312) 996-7704

Fax(312) 413-8283

Sole ProprietorYes

Medical School CMSOtherGraduated 1998

Enumeration DateAugust 29, 2005

Last NPPES UpdateMarch 5, 2014

✔ NPI 1689667347 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Geriatric MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207RG0300X

License✔ Licensed in IL · 036124066

Definition

An internist who has special knowledge of the aging process and special skills in the diagnostic, therapeutic, preventive and rehabilitative aspects of illness in the elderly. This specialist cares for geriatric patients in the patient's home, the office, long-term care settings such as nursing homes and the hospital.

840 S WOOD ST, Chicago, IL 60612

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Other Names 1

Professional Name (2)Fidel E Castillo Md

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Fidel E Castillo Diaz Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID2163619156

PECOS Enrollment IDI20101202000876

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 6

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

68 services26 patients

Insertion of needle into vein for collection of blood sample 36415

This procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.

42 services20 patients

Hemoglobin a1c level 83036

Hemoglobin A1c (HbA1c) is a test that measures your average blood sugar level over the past 2-3 months. It's used to monitor how well diabetes is being controlled. High levels may indicate that your diabetes treatment plan needs adjustment.

36 services16 patients

Administration of influenza virus vaccine G0008

The administration of the influenza virus vaccine, also known as the flu shot, is a simple procedure to protect against the flu. A healthcare provider injects a small dose of the vaccine into your arm. This stimulates your immune system to produce antibodies, which will help your body fight off the flu if exposed.

12 services11 patients

Influenza vaccine, inactivated 90653

The Influenza vaccine, inactivated, is a shot given to protect against the flu. It contains killed virus particles that help your body build immunity to the flu. It's recommended annually to keep your protection up-to-date. It's safe for ages 6 months and up.

11 services11 patients

Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439

An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.

11 services11 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

University Of Illinois Hospital And Clinics

Acute Care Hospitals · Chicago, IL

2/5 CMS rating

OwnershipGovernment - State

CMS Certification Number140150

Location1740 West Taylor St Suite 1400Chicago, IL 60612 · Cook County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60612 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$183.39 typical visit price

range $60.08 – $183.39

Typical copayment $45.84 (range $15.02 – $45.84)

Most-billed visit code 99205

Established Patient

$105.70 typical visit price

range $18.97 – $148.12

Typical copayment $26.42 (range $4.74 – $37.03)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

87.08/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored as part of a group practice

Quality

70.79

Promoting Interoperability

100

Improvement Activities

Cost

52.82

Referred Medical Equipment & Supplies CMS DME claims 3

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253

DME-Other DME · category DE017N

6 suppliers20 claims52 services$5.53 avg. paid by Medicare

Lancets, per box of 100 A4259

DME-Medical/Surgical Supplies · category DA000N

4 suppliers13 claims21 services$1.06 avg. paid by Medicare

Standard wheelchair K0001

DME-Wheelchairs · category DD000N

1 supplier11 claims11 services$18.09 avg. paid by Medicare

Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. KYLE CORSO MORK PHARMD, MBA

Pharmacist (Ambulatory Care)

840 S WOOD ST
CHICAGO, IL 60612

Cook County (312) 996-6783

DR. ALEXANDER SALIM GEHA MD

Surgery

840 S WOOD ST, SUITE 417 CSB
CHICAGO, IL 60612

Cook County (312) 996-5402

DR. KAREN STEINMETZ PATER PHARMD, BCPS, CDE

Pharmacist (Pharmacotherapy)

840 S WOOD ST, SUITE 163, CSB
CHICAGO, IL 60612

Cook County (312) 996-0870

MISS SHIYUN KIM PHARMD

Pharmacist (Pharmacotherapy)

840 S WOOD ST, SUITE 163 CLINICAL SCIENCES BUILDING
CHICAGO, IL 60612

Cook County (312) 996-5025

OANA CRISTINA DANCIU M.D.

Internal Medicine (Hematology & Oncology)

840 S WOOD ST, MC-713
CHICAGO, IL 60612

Cook County (312) 996-1581

DR. MARY BIGLIN MD

Internal Medicine (Gastroenterology)

840 S WOOD ST
CHICAGO, IL 60612

Cook County (312) 996-6651

ALICIA CHANG COJULUN MD

Student in an Organized Health Care Education/Training Program

840 S WOOD ST, MC 856
CHICAGO, IL 60612

Cook County (708) 691-0426

ABDUL KHAYYAM MOHAMMED MD

Pathology (Anatomic Pathology)

840 S WOOD ST
CHICAGO, IL 60612

Cook County (331) 300-9864

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Fidel Castillo Diaz's NPI number?

The NPI number for Fidel Castillo Diaz is 1689667347. It was assigned to this individual provider in the NPPES registry on August 29, 2005. The provider is also known as Fidel E Castillo MD.

Where is Fidel Castillo Diaz located?

Fidel Castillo Diaz practices at 840 S Wood St M-C 717 Csn 440, Chicago, IL 60612. The listed phone number is (312) 996-7704.

What is Fidel Castillo Diaz's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Geriatric Medicine, with taxonomy code 207RG0300X.

Is Fidel Castillo Diaz enrolled in Medicare?

Yes. Fidel Castillo Diaz is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Is Fidel Castillo Diaz affiliated with any hospitals?

According to CMS data, Fidel Castillo Diaz is affiliated with University Of Illinois Hospital And Clinics.

When was this NPI record last updated?

The NPPES record for Fidel Castillo Diaz was last updated on March 5, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.