HERNAN SIERRA FERNANDEZ M.D.
NPI 1104074749
Pediatrics - Neonatal-Perinatal Medicine in Chicago, IL

NPI Status: Active since September 08, 2008

Contact Information

840 S WOOD ST
CSB 1262, M/C 856
CHICAGO, IL
ZIP 60612
Phone: (312) 355-3282
Fax: (312) 355-5548

NPI Profile Information
Primary Taxonomy
Secondary Taxonomies
Secondary Locations
Medicare Participation & PECOS Status
NPI Validation
Other Providers Same Location
Frequently Asked Questions

Individual
Male
Pediatrics
Neonatal-Perinatal Medicine
PECOS Enrolled

About HERNAN SIERRA FERNANDEZ

This page provides the complete NPI Profile along with additional information for Hernan Sierra Fernandez, a pediatrician established in Chicago, Illinois with a medical specialization in Pediatrics, focusing in neonatal-perinatal medicine . The healthcare provider is registered in the NPI registry with number 1104074749 assigned on September 2008. The practitioner's primary taxonomy code is 2080N0001X with license number 036-120314 (IL). The provider is registered as an individual and his NPI record was last updated 6 years ago.

NPI: 1104074749
Provider Name: HERNAN SIERRA FERNANDEZ M.D.
Gender: Male
Entity Type: Individual
Location Address: 840 S WOOD ST CSB 1262, M/C 856 CHICAGO, IL 60612
Location Phone: (312) 355-3282
Location Fax: (312) 355-5548
Mailing Address: 130 N GARLAND CT APT 1703 CHICAGO, IL 60602
Mailing Phone: (312) 810-4065
Is Sole Proprietor?: Yes
Enumeration Date: 09-08-2008
Last Update Date: 05-01-2020
Code Navigator

A pediatrician like Hernan Sierra Fernandez is a physician who has completed a pediatric residency and is board-certified or board-eligible in a pediatric specialty. Pediatric care providers are trained to care for newborns, infants, children and adolescents. A pediatrician could perform physical exams, manage vaccinations, monitor development milestones, diagnose illnesses, infections, injuries or other health problems, etc.

Location Map

Secondary Locations

345 Smith Ave N
Saint Paul, MN 55102
(312) 810-4065
2525 Chicago Ave
Minneapolis, MN 55404
(312) 810-4065

Specialty - Primary Taxonomy

The NPI enumerator requires providers to submit at least one taxonomy code. A taxonomy code is a unique 10-character code that describes the healthcare provider type, classification, and the area of specialization. There could be only one primary taxonomy code per NPI record. For individual NPIs the license data is associated to the taxonomy code.

Classification: Pediatrics Neonatal-Perinatal Medicine
Taxonomy Code: 2080N0001X
Type: Allopathic & Osteopathic Physicians
License No.: 036-120314
License State: IL
Taxonomy Description: A pediatrician who is the principal care provider for sick newborn infants. Clinical expertise is used for direct patient care and for consulting with obstetrical colleagues to plan for the care of mothers who have high-risk pregnancies.

Secondary Taxonomies

The provider has reported to the NPI enumerator additional taxonomy codes. Multiple taxonomy codes may represent subspecialties or other areas of specialization the provider maybe licensed to practice.

No.	Taxonomy Code	Type	Classification / Specialization	License No. (State)
1	2080N0001X	Allopathic & Osteopathic Physicians	Pediatrics Neonatal-Perinatal Medicine	A105435 (CA)

Medicare Participation & PECOS Enrollment Status

Hernan Sierra Fernandez is enrolled in PECOS and is eligible to order or refer health care services for Medicare patients. The provider is eligible to order or refer: Part B Clinical Laboratory and Imaging, Durable Medical Equipment (DME), a Home Health Agency (HHA) and Power Mobility Devices.

What is PECOS?
PECOS is the online Medicare enrollment management system or Provider, Enrollment, Chain and Ownership System. The PECOS system is a database of providers who have registered with CMS as providers or suppliers. PECOS is the primary source of information about verified Medicare professionals. Providers that want to participate in this program need to enroll in PECOS with their NPI number to avoid denied claims.

Is the provider registered in PECOS? Yes
Eligible to Order or Refer Part B Clinical Laboratory and Imaging: Yes
Eligible to Order or Refer Durable Medical Equipment (DMEPOS): Yes
Eligible to Order or Refer a Home Health Agency (HHA): Yes
Eligible to Order or Refer Power Mobility Devices: Yes

NPI NPI Number Validation

How NPI Validation Works

The NPI validation process uses the ISO-standard Luhn algorithm, a mathematical "handshake", to ensure that a provider's 10-digit ID is authentic and free of common typing errors.

To verify the NPI 1104074749, we treat the final digit (9) as the Check Digit—the target answer we need to reach. The process begins by taking the first nine digits and adding a constant value of 24, which accounts for the "80840" prefix required for all U.S. health identifiers. We then double every other digit starting from the right and sum the individual digits of those results together. For this specific NPI, that total comes to 61. The final step is to find the difference between that total and the next multiple of ten (70 - 61 = 9).

Digit-by-digit view

Use the first nine digits for the calculation. Starting from the right, double every other digit. The last digit is the check digit and is not part of the calculation.

Pos 1

Doubled → 2

Pos 2

Unchanged

Pos 3

Doubled → 0

Pos 4

Unchanged

Pos 5

Doubled → 0

Pos 6

Unchanged

Pos 7

Doubled → 8

Pos 8

Unchanged

Pos 9

Doubled → 8

Check

Target digit

Regular digit Doubled digit Check digit

Step 1: Double every other digit from the right

Starting with the rightmost digit of the first nine digits, double every other value. If doubling creates a two-digit number, add those digits together.

1 → 2 0 → 0 0 → 0 4 → 8 4 → 8