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Edit this profileAt a glance
- 840 S Wood St, M-C 717 Csn 440, Chicago, IL 60612
About Dr. Castillo Diaz
Fidel E. Castillo Diaz, MD is a healthcare provider in Chicago, IL specializing in geriatric medicine. Medicare claims data shows Fidel provided 180 services to 95 patients. The services billed most often include established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more, insertion of needle into vein for collection of blood sample, and hemoglobin a1c level. This provider record is associated with NPI 1689667347.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (312) 996-7704
- Email not available
Is this your home address or personal number? Hide it
Practice Locations
840 S WOOD ST M-C 717 CSN 440
Chicago, IL 60612
Conditions Commonly Evaluated or Treated
Within Geriatric Medicine generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Balance & Mobility
Blood Health
Bones & Joints
Brain & Nerves
- Delirium
- Dementia with behavioral symptoms
- Essential tremor
- Normal Pressure Hydrocephalus
- Parkinson's disease
Cognitive Health
Digestive
General Health
Geriatric care
Hormone Health
Mental Health
Mobility
Pain
Skin & Wounds
Sleep
Most searched conditions
Cardiovascular
Ears & Hearing
Infections
Joints & Pain
Lung Health
Men's Health
Oral Health
Spine & Pain
Urinary & Bladder
Urinary Health
Procedures & services
Brain & memory
Cardiovascular
Care Placement
Caregiver Support
Chronic Disease Management
Cognitive Health
Digestive
Elder care
End-of-Life Planning
Foot Care
General Geriatric Care
General Health
Geriatric care
Home Care
Legal & Cognitive
Mental Health
Mobility & Equipment
Nutrition
Outpatient Care
Pain Management
Palliative & Hospice
Patient Safety
Planning & Support
- Advance Care Planning
- Assisted Living Placement Assessment
- Caregiver Counseling
- Long-Term Care Insurance Evaluation
- Medical Power Of Attorney Consultation
Preventive Care
Respiratory
Safety & Daily Function
Sensory Health
Surgical Clearance
Urinary & Bladder
Urinary Health
Wounds & skin
Routine Blood Tests
Most searched procedures
Bone Health
Ear Care
Medication Management
Mobility
Pain & Injections
Wound Care
Procedures Most Often Billed to Medicare
180 services · 95 patients · 6 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Insertion of needle into vein for collection of blood sample | Procedure | 36415 |
42 | Less often than most peers in Geriatric Medicine |
| Influenza vaccine, inactivated | Treatment | 90653 |
11 | Less often than most peers in Geriatric Medicine |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
68 | Less often than most peers in Geriatric Medicine |
| Hemoglobin a1c level | Lab test | 83036 |
36 | As often as other peers in Geriatric Medicine |
| Administration of influenza virus vaccine | Billing code | G0008 |
12 | Less often than most peers in Geriatric Medicine |
| Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | Billing code | G0439 |
11 | Less often than most peers in Geriatric Medicine |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Related specialists at this location 5
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other geriatricians in Chicago 8
Same specialty, same city.
More connections — 24 related providers in 3 groups
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 1998 at Other 8
Providers who graduated from the same medical school in the same year.
Also performs Insertion of needle into vein for collection of blood sample 8
Providers in IL who bill this service to Medicare most often.
Common questions
What is Dr. Castillo Diaz's specialty?
Dr. Castillo Diaz is a geriatrician in Chicago, IL. That is the designation recorded for this NPI in the federal registry, where it is listed as “Geriatric Medicine”.
NPI registry
Where can I find Dr. Castillo Diaz?
Dr. Castillo Diaz is listed at 840 S Wood St M-C 717 Csn 440, Chicago, IL 60612. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Dr. Castillo Diaz?
The number on file is (312) 996-7704. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for Dr. Castillo Diaz?
Dr. Castillo Diaz's National Provider Identifier is 1689667347. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
What is Dr. Castillo Diaz's medical education?
Dr. Castillo Diaz attended Other, graduating in 1998. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Castillo Diaz have?
Dr. Castillo Diaz has 28 years experience. Calculated from a graduation year of 1998, reported in the CMS National Downloadable File.
CMS public data
What is Dr. Castillo Diaz known for?
According to Medicare billing data, Dr. Castillo Diaz performs procedures including insertion of needle into vein for collection of blood sample; provides treatments such as influenza vaccine, inactivated, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Castillo Diaz's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Castillo Diaz. If this is you, claiming it is free.
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