SIDNEY P. REGALADO M.D.
NPI 1407841414
Radiology - Diagnostic Radiology in Evanston, IL

Q: What is Sidney Regalado's NPI number?

The NPI number for Sidney Regalado is 1407841414. It was assigned to this individual provider in the NPPES registry on September 15, 2005.

Q: What is Sidney Regalado's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.

Q: When was this NPI record last updated?

The NPPES record for Sidney Regalado was last updated on December 14, 2018. NPI Profile syncs with the weekly NPPES data releases published by CMS.

Active since September 15, 2005PECOS EnrolledAccepts Medicare Assignment

93.08/100

CMS Quality Rating

2650 RIDGE AVE., DEPARTMENT OF RADIOLOGY, EVANSTON, IL 60201(847) 570-2160(847) 570-2942 Get Directions Write a Review

NPPES record last updated: December 14, 2018. Verified against the NPPES registry weekly; last sync: July 19, 2026.

On this page

About Sidney P. Regalado M.d. NPPES

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

SIDNEY P. REGALADO M.D. (NPI 1407841414) is an individual diagnostic radiology provider in Evanston, Illinois, licensed in Illinois (036-108195) and active in the NPI registry since September 2005. He is enrolled in Medicare PECOS, is affiliated with Northshore University Healthsystem - Evanston Hospital, and is a graduate of Clvlnd Clinic Lerner College Of Med Of Case Wstn Rsv University (1999).

NPPES Registry Identity

NPI1407841414

Entity TypeIndividualMale

Primary Taxonomy2085R0202X

Provider Legal NameSIDNEY P. REGALADOCredential: M.D.

Location Address2650 RIDGE AVE., DEPARTMENT OF RADIOLOGYEvanston, IL 60201-1718

Mailing Address2650 Ridge Ave., Department Of RadiologyEvanston, IL 60201-1718 · (847) 570-2160 · Fax (847) 570-2942

Phone(847) 570-2160

Fax(847) 570-2942

Sole ProprietorNo

Medical School CMSClvlnd Clinic Lerner College Of Med Of Case Wstn Rsv UniversityGraduated 1999

Enumeration DateSeptember 15, 2005

Last NPPES UpdateDecember 14, 2018

✔ NPI 1407841414 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyRadiology · Diagnostic RadiologyAllopathic & Osteopathic Physicians

Taxonomy Code2085R0202X

License✔ Licensed in IL · 036-108195

Definition

A radiologist who utilizes x-ray, radionuclides, ultrasound and electromagnetic radiation to diagnose and treat disease.

2650 RIDGE AVE., Evanston, IL 60201

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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

Sidney P. Regalado M.d. 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 ID2668446550

PECOS Enrollment IDI20050721000520

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 55

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.

Ct scan of blood vessels of abdomen and pelvis with contrast 74174

A CT scan of the abdomen and pelvis with contrast is a medical imaging procedure. A special dye, called contrast, is used to make blood vessels more visible. The scan produces detailed images of your abdomen and pelvis, helping doctors to diagnose conditions or plan treatments.

354 services326 patients

Ct scan of blood vessels of chest with contrast 71275

A CT scan of the chest with contrast is a non-invasive imaging test. It uses X-rays and a special dye to get detailed images of your blood vessels in the chest. This helps in diagnosing conditions related to heart and lungs.

312 services296 patients

Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes 99152

This procedure involves a doctor administering a medication to reduce your consciousness during a procedure. This helps in managing discomfort and anxiety. The initial application lasts for 15 minutes and is for individuals aged 5 years or older.

275 services253 patients

X-ray of chest, 1 view 71045

A chest X-ray, 1 view, is a quick, painless test that produces images of the structures within your chest, such as your heart, lungs, and blood vessels. It helps in diagnosing conditions like pneumonia, heart problems, or lung cancer. You'll stand in front of a machine that emits X-rays, which pass through your body to create the image.

148 services129 patients

Ultrasonic guidance for blood vessel access 76937

Ultrasonic guidance for blood vessel access is a medical procedure where sound waves are used to create images of your blood vessels. This helps doctors to accurately locate and access the vessels for treatments or tests, ensuring safety and precision.

135 services129 patients

Fluoroscopic guidance for insertion or removal of central vein access device 77001

Fluoroscopic guidance for central vein access device insertion or removal is a procedure where a special X-ray, called a fluoroscope, is used to help accurately place or remove a device in a central vein. This device aids in delivering medications or collecting blood samples.

114 services105 patients

Ultrasonic guidance for needle placement 76942

Ultrasonic guidance for needle placement is a technique where sound waves create images that help accurately position the needle during procedures. This method ensures precision, minimizes discomfort, and increases safety.

81 services77 patients

Aspiration of fluid from chest cavity using imaging guidance 32555

This procedure, known as a thoracentesis, involves removing fluid from the space between the lungs and chest wall, called the pleural space. It's performed under imaging guidance to ensure precision. It can help diagnose conditions or relieve symptoms like shortness of breath.

79 services60 patients

Drainage of fluid from abdominal cavity using imaging guidance 49083

This procedure involves removing excess fluid from your abdominal cavity, which can relieve discomfort. A specialist uses imaging technology to guide a thin needle into the right spot. The fluid is then drained out safely.

66 services41 patients

X-ray of chest, 2 views 71046

A chest X-ray, 2 views, is a quick, painless test that creates pictures of the structures inside your chest, such as your heart, lungs, and blood vessels. Two different angles are used to get a comprehensive view. This helps in diagnosing conditions like pneumonia, heart problems, or lung cancer.

66 services62 patients

Ct scan of abdominal aorta and both leg arteries with contrast 75635

A CT scan of the abdominal aorta and both leg arteries with contrast is a medical imaging procedure. A special dye is injected to make your blood vessels visible on the scan. This helps to check for any blockages or abnormalities in these areas.

53 services50 patients

Review by radiologist of image for replacement of stomach or large bowel tube 75984

This procedure involves a radiologist examining images to assess the placement of a tube in your stomach or large bowel. The tube helps with digestion or removal of waste. The radiologist's review ensures the tube is correctly positioned for your safety and comfort.

51 services24 patients

Injection of contrast through abdominal cavity tube for x-ray study 49424

This procedure involves injecting a contrast substance through a tube in your abdominal cavity. This helps to highlight certain areas in your body for an X-ray study. It's a crucial step for accurate diagnosis and treatment planning.

50 services29 patients

Review by radiologist of abscess or sinus cavity study 76080

This procedure involves a specialist, known as a radiologist, examining images of your abscess or sinus cavity. These images help identify any problems or changes in your condition. The radiologist's review is crucial in determining the best course of treatment.

50 services29 patients

Insertion of central venous tube with port (5 years or older) 36561

A central venous tube with port is a small, flexible tube inserted into a large vein, usually in the chest. It allows for easy administration of medication, fluids, or blood products over a long period. A port is attached under the skin for easy access. It's safe for individuals aged 5 and above.

45 services45 patients

Insertion of needle and/or tube into hemodialysis circuit and balloon dilation of dialysis segment with review by radiologist 36902

This procedure involves inserting a needle or tube into your hemodialysis circuit, a system that cleans your blood when your kidneys can't. A balloon is then used to widen a narrow section of this circuit. A radiologist reviews the procedure to ensure accuracy.

42 services41 patients

Replacement of kidney drainage tube using imaging guidance with review by radiologist 50435

This procedure involves replacing an existing kidney drainage tube. Using imaging technology, a radiologist precisely guides the process to ensure accuracy. This helps drain excess fluid from kidneys, improving their function and your comfort.

36 services20 patients

Insertion of tunneled central venous tube for infusion (5 years or older) 36558

The insertion of a tunneled central venous tube is a procedure where a thin, flexible tube is placed into a large vein, usually in the neck or chest. This tube allows healthcare providers to give medications, fluids, or nutrients directly into your bloodstream over a longer period.

35 services35 patients

Ct scan of blood vessels of abdomen with contrast 74175

A CT scan of the abdomen's blood vessels with contrast is a diagnostic procedure. A safe dye is injected into your veins, which helps to highlight your blood vessels on the images. This helps doctors examine your abdominal blood vessels more clearly.

35 services35 patients

Mri scan of blood vessels of chest 71555

An MRI scan of the chest blood vessels is a non-invasive imaging procedure. It uses a magnetic field and radio waves to create detailed images of the vessels in your chest. This helps in detecting any abnormalities or diseases. It's a safe procedure with minimal discomfort.

34 services34 patients

Drainage of fluid collection of abdominal cavity by tube using imaging guidance 49406

This procedure involves the removal of excess fluid from the abdominal cavity using a tube. Imaging guidance, such as ultrasound or CT scan, is used to accurately place the tube and ensure the fluid is safely drained. This can help relieve discomfort and pressure.

33 services25 patients

Core needle biopsy of lung or center cavity of chest (mediastinum), accessed through skin 32408

A core needle biopsy of the lung or mediastinum is a procedure where a small sample of tissue is collected using a needle inserted through the skin. This helps in diagnosing lung conditions or diseases in the chest's central cavity. It's a safe and minimally invasive process.

31 services31 patients

X-ray of abdomen, 1 view 74018

An X-ray of the abdomen, 1 view, is a quick and painless imaging test. It uses a small amount of radiation to produce images of the structures in your abdomen, such as the stomach, liver, and intestines. This can help identify issues like blockages, infections, or injuries.

31 services30 patients

Insertion of non-tunneled central venous tube for infusion (5 years or older) 36556

This procedure involves placing a thin tube into a large vein, usually in the neck or chest, to administer medication or fluids. It's done under local anesthesia to minimize discomfort. It's a standard, safe procedure for individuals aged 5 and above.

29 services29 patients

Replacement of liver duct drainage tube using imaging guidance with review by radiologist 47536

This procedure involves replacing a liver duct drainage tube, which helps remove bile from your liver. A radiologist uses imaging technology to guide the process, ensuring accurate placement of the new tube. They will also review the results for precision.

28 services20 patients

Insertion of tube for infusion with imaging guidance and review by radiologist, patient 5 years or older 36573

This procedure involves placing a tube into a vein for medication or fluid delivery. Imaging guidance helps ensure correct placement, while a radiologist reviews the process for safety. It's suitable for patients aged 5 and above.

27 services26 patients

Exchange of abdominal cavity drainage tube using imaging guidance 49423

This is a procedure where your existing abdominal drainage tube will be replaced under imaging guidance. This guidance helps ensure accurate placement and minimizes complications. It's done to maintain effective drainage of fluids from your abdomen.

22 services16 patients

X-ray of knee, 4 or more views 73564

An X-ray of the knee, 4 or more views, is a non-invasive imaging test. It involves capturing multiple images of your knee from different angles. This helps in diagnosing conditions such as fractures, arthritis, or infections. The procedure is quick and painless.

22 services17 patients

Fine needle aspiration biopsy using ultrasound guidance, first growth 10005

Fine needle aspiration biopsy with ultrasound guidance is a procedure where a thin needle is inserted into a growth to extract a small sample. Ultrasound helps accurately locate the growth. This sample is then analyzed to determine the nature of the growth.

20 services20 patients

Needle biopsy of liver through skin 47000

A needle biopsy of the liver through skin is a procedure where a small tissue sample from your liver is collected using a thin needle. This is done to diagnose liver diseases or conditions. It involves inserting the needle through your skin and into your liver.

20 services20 patients

Injection of bile duct for x-ray through already existing skin access using imaging guidance with review by radiologist 47531

This procedure involves injecting a contrast agent into your bile duct through an existing skin access point. The contrast helps highlight the duct on X-rays. A radiologist uses imaging guidance to ensure correct placement and reviews the images afterwards for any abnormalities.

20 services17 patients

X-ray of hip, 2-3 views 73502

An X-ray of the hip with 2-3 views is a non-invasive imaging test. It uses a small amount of radiation to produce pictures of the hip joint. These images help in diagnosing conditions like fractures, arthritis, or other abnormalities. The process is quick and painless.

20 services20 patients

Drainage of fluid from chest cavity with insertion of indwelling tube using imaging guidance 32557

This procedure involves removing fluid from your chest cavity, which is the space around your lungs. A small tube is inserted, under image guidance, to drain the fluid. This tube stays in place to prevent fluid buildup, aiding in your breathing and comfort.

19 services19 patients

Replacement of stomach or large bowel tube using fluoroscopic guidance with contrast 49450

This procedure involves replacing a tube in your stomach or large bowel. It's guided by a special type of X-ray called fluoroscopy, which helps ensure accurate placement. Contrast material is used to enhance the visibility of your internal structures.

19 services17 patients

Needle biopsy of kidney 50200

A needle biopsy of the kidney is a medical procedure where a small sample of kidney tissue is removed using a special needle. This is done to examine the tissue under a microscope for any abnormalities. It helps in diagnosing potential kidney conditions.

19 services19 patients

Insertion of vena cava filter with review by radiologist 37191

A vena cava filter is a small device placed in your body's largest vein to prevent blood clots from reaching your lungs. A radiologist reviews the procedure to ensure its success and your safety.

18 services18 patients

X-ray of shoulder, minimum of 2 views 73030

An X-ray of the shoulder, with a minimum of 2 views, is a non-invasive imaging test. It uses a small amount of radiation to produce images of your shoulder bones. This helps in diagnosing conditions like fractures, arthritis, or other abnormalities. The procedure is quick and painless.

18 services16 patients

Needle biopsy of growth of abdominal cavity 49180

A needle biopsy of the abdominal cavity growth is a procedure where a thin needle is inserted into the abdomen to collect a small tissue sample from the growth. This sample is then examined under a microscope to identify the nature of the growth. It's a safe, minimally invasive procedure.

17 services16 patients

Review by radiologist of ct guidance for needle placement 77012

This process involves a radiologist examining CT scan images to accurately guide a needle's placement within the body. This technique is often used for biopsies or treatments, ensuring precision and safety.

17 services17 patients

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215

This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.

16 services16 patients

Balloon dilation of dialysis segment with review by radiologist 36907

Balloon dilation of a dialysis segment is a procedure where a tiny balloon is inserted and inflated in a narrowed area of your dialysis access site, improving blood flow. A radiologist reviews images to ensure success.

15 services12 patients

Mri scan of blood vessels of abdomen 74185

An MRI scan of the abdomen's blood vessels, known as an abdominal MR angiography, is a non-invasive imaging test. It uses magnetic fields and radio waves to provide detailed images of your blood vessels. This aids in diagnosing issues like blockages or aneurysms.

15 services15 patients

Removal of tunneled central venous tube 36589

A tunneled central venous tube removal is a procedure to take out a long, thin tube that was previously placed in a large vein in your body. This tube helps deliver medication or nutrition. The removal is usually quick and done under local anesthesia.

14 services14 patients

Insertion of stomach tube using fluoroscopic guidance with contrast 49440

This is a procedure where a tube is inserted into your stomach to assist with digestion or removal of substances. It's done under fluoroscopic guidance, a type of imaging that allows real-time viewing. Contrast dye is used to enhance the visibility of structures.

14 services14 patients

X-ray of foot, minimum of 3 views 73630

An X-ray of the foot, minimum of 3 views, is a non-invasive imaging test. It uses a small amount of radiation to produce images of the bones and tissues in your foot. This helps to identify fractures, infections, or other abnormalities. Multiple views ensure a comprehensive examination.

14 services13 patients

Treatment of broken lower spine bone with placement of stabilizing device 22514

This procedure involves fixing a broken bone in the lower spine. A stabilizing device is inserted to support the bone, promoting healing and reducing pain. The device helps to maintain proper spinal alignment and stability during your recovery period.

13 services13 patients

Removal of central venous tube with port or pump 36590

The removal of a central venous tube with port or pump is a procedure that eliminates a device implanted under your skin. This device helped deliver medication or nutrients directly into a large vein near your heart. Its removal involves a minor surgical procedure performed under local anesthesia.

13 services13 patients

Needle biopsy of muscle 20206

A needle biopsy of muscle is a procedure where a small sample of muscle tissue is collected using a needle. This sample is then examined under a microscope to identify any abnormalities or diseases. The process is generally quick and minimally invasive.

12 services11 patients

Insertion of needle and/or tube into hemodialysis circuit with review by radiologist 36901

This procedure involves inserting a needle or tube into your hemodialysis circuit, which is part of the system that cleans your blood when your kidneys can't. A radiologist, a doctor specialized in imaging techniques, will review the process to ensure everything is correct.

12 services12 patients

Insertion of tube into gallbladder using imaging guidance with review by radiologist 47490

This procedure involves placing a tube into your gallbladder using imaging technology, which helps visualize the area. A radiologist, a doctor specializing in medical imaging, will review the process to ensure accuracy and safety.

12 services12 patients

Placement of tube of kidney using imaging guidance with review by radiologist 50432

This procedure involves the insertion of a tube into your kidney using imaging technology for precision. A radiologist, a doctor specializing in medical imaging, will review the process. This can help with kidney function and drainage.

12 services11 patients

Placement of tube of kidney and urinary tube through new skin access using imaging guidance with review by radiologist 50433

This procedure involves the creation of a new skin access point for a tube connecting to your kidney and urinary tract. It's done with the help of advanced imaging technology for precision. A radiologist will review the procedure to ensure accuracy.

12 services12 patients

Deep biopsy of bone using needle or trocar 20225

A deep biopsy of bone using a needle or trocar is a procedure where a special needle is inserted into a bone to collect a small tissue sample. This sample is then examined under a microscope to detect any abnormalities. This procedure helps diagnose conditions like cancer or infections.

11 services11 patients

Needle biopsy or removal of surface lymph nodes 38505

A needle biopsy or removal of surface lymph nodes is a procedure where a small needle is inserted into a lymph node to collect a tissue sample. This sample is then examined under a microscope to check for diseases such as cancer. The procedure is usually quick and minimally invasive.

11 services11 patients

X-ray of ankle, minimum of 3 views 73610

An ankle X-ray is a quick, painless imaging test. It involves capturing at least three different images or 'views' of your ankle using small amounts of radiation. These images help identify any abnormalities or injuries, such as fractures or arthritis.

11 services11 patients

Hospital Affiliations CMS Care Compare 4

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

Northshore University Healthsystem - Evanston Hospital

Acute Care Hospitals · Evanston, IL

5/5 CMS rating

OwnershipVoluntary non-profit - Other

CMS Certification Number140010

Location2650 Ridge AveEvanston, IL 60201 · Cook County

Emergency services Birthing friendly

The University Of Chicago Medical Center

Acute Care Hospitals · Chicago, IL

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number140088

Location5841 South MarylandChicago, IL 60637 · Cook County

Emergency services Birthing friendly

Swedish Hospital

Acute Care Hospitals · Chicago, IL

2/5 CMS rating

OwnershipVoluntary non-profit - Church

CMS Certification Number140114

Location5145 N California AveChicago, IL 60625 · Cook County

Emergency services Birthing friendly

Northwestern Medicine Central Dupage Hospital

Acute Care Hospitals · Winfield, IL

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number140242

Location25 North Winfield RoadWinfield, IL 60190 · Du Page County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60201 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

$94.06 typical visit price

range $60.08 – $183.39

Typical copayment $23.51 (range $15.02 – $45.84)

Most-billed visit code 99203

Established Patient

$74.80 typical visit price

range $18.97 – $148.12

Typical copayment $18.70 (range $4.74 – $37.03)

Most-billed visit code 99213

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.

93.08/100

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

Scored through an Alternative Payment Model

Quality

80.79

Promoting Interoperability

100

Improvement Activities

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.

CHAD MICHAEL KELLER PA

Physician Assistant (Surgical)

2650 RIDGE AVE., BURCH 100, CARDIAC SURGERY DIVISION
EVANSTON, IL 60201

Cook County (847) 570-2859

DR. STEPHEN JOSEPH SCHRANTZ JR. M.D.

Internal Medicine (Infectious Disease)

2650 RIDGE AVE., BURCH BLDG. RM 124
EVANSTON, IL 60201

Cook County (847) 570-1502

PHILIP G HORCHER MD

Pediatrics (Neonatal-Perinatal Medicine)

2650 RIDGE AVE., WALGREEN 1505
EVANSTON, IL 60201

Cook County (847) 570-2033

ANNA I. MCGOW M.D.

Radiology (Diagnostic Radiology)

2650 RIDGE AVE., DEPARTMENT OF RADIOLOGY
EVANSTON, IL 60201

Cook County (847) 570-2475

DR. DAVID MICHAEL DICKERSON M.D.

Anesthesiology (Pain Medicine)

2650 RIDGE AVE., DEPARTMENT OF ANESTHESIA
EVANSTON, IL 60201

Cook County (847) 570-2287

DR. HECTOR FERRAL M.D.

Radiology (Vascular & Interventional Radiology)

2650 RIDGE AVE., DEPT. OF RADIOLOGY
EVANSTON, IL 60201

Cook County (847) 570-2475

JACOB SETH ECANOW MD

Radiology (Diagnostic Radiology)

2650 RIDGE AVE., DEPARTMENT OF RADIOLOGY
EVANSTON, IL 60201

Cook County (847) 570-2475

DR. LINDA M. ERNST M.D. M.H.S.

Pathology (Anatomic Pathology & Clinical Pathology)

2650 RIDGE AVE., DEPARTMENT OF PATHOLOGY
EVANSTON, IL 60201

Cook County (847) 570-2791

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 Sidney Regalado's NPI number?

The NPI number for Sidney Regalado is 1407841414. It was assigned to this individual provider in the NPPES registry on September 15, 2005.

Where is Sidney Regalado located?

Sidney Regalado practices at 2650 Ridge Ave. Department Of Radiology, Evanston, IL 60201. The listed phone number is (847) 570-2160.

What is Sidney Regalado's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.

Is Sidney Regalado enrolled in Medicare?

Yes. Sidney Regalado 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 Sidney Regalado affiliated with any hospitals?

According to CMS data, Sidney Regalado is affiliated with Northshore University Healthsystem - Evanston Hospital, The University Of Chicago Medical Center, Swedish Hospital and Northwestern Medicine Central Dupage Hospital.

When was this NPI record last updated?

The NPPES record for Sidney Regalado was last updated on December 14, 2018. NPI Profile syncs with the weekly NPPES data releases published by CMS.