ALEXA RAE MARZO MD
NPI 1659831378
Pediatrics - Pediatric Critical Care Medicine in St Petersburg, FL

NPI Status: Active since March 20, 2019

Contact Information

501 6TH AVE S
ST PETERSBURG, FL
ZIP 33701
Phone: (727) 767-4106
Fax: (727) 767-8804

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  • Individual
  • Female
  • Years of Experience 8
  • Pediatrics
  • Pediatric Critical Care Medicine
  • Accepts Medicare Approved Payment
  • PECOS Enrolled

About ALEXA MARZO

This page provides the complete NPI Profile along with additional information for Alexa Marzo, a pediatrician established in St Petersburg, Florida with a medical specialization in Pediatrics, focusing in pediatric critical care medicine and more than 8 years of experience. She graduated from University Of Arizona College Of Medicine in 2019. The healthcare provider is registered in the NPI registry with number 1659831378 assigned on March 2019. The practitioner's primary taxonomy code is 2080P0203X with license number ME156042 (FL). The provider is registered as an individual and her NPI record was last updated April 2026.

NPI
1659831378
Provider Name
ALEXA RAE MARZO MD
Gender
Female
Entity Type
Individual
Location Address
501 6TH AVE S ST PETERSBURG, FL 33701
Location Phone
(727) 767-4106
Location Fax
(727) 767-8804
Mailing Address
501 6TH AVE S ST PETERSBURG, FL 33701
Mailing Phone
(727) 767-4106
Mailing Fax
(727) 767-8804
Medical School Name
UNIVERSITY OF ARIZONA COLLEGE OF MEDICINE
Graduation Year
2019
Is Sole Proprietor?
No
Enumeration Date
03-20-2019
Last Update Date
04-08-2026
Code Navigator

A pediatrician like Alexa Marzo 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

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 Pediatric Critical Care Medicine

Taxonomy Code
2080P0203X
Type
Allopathic & Osteopathic Physicians
License No.
ME156042
License State
FL
Taxonomy Description
A pediatrician expert in advanced life support for children from the term or near-term neonate to the adolescent. This competence extends to the critical care management of life-threatening organ system failure from any cause in both medical and surgical patients and to the support of vital physiological functions. This specialist may have administrative responsibilities for intensive care units and also facilitates patient care among other specialists.

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)
1390200000XStudent, Health Care

Student in an Organized Health Care Education/Training Program

 

Medicare Participation & PECOS Enrollment Status

Alexa Marzo is registered with Medicare and accepts claims assignment, this means the provider accepts the approved amount for the cost of rendered services as full payment. Participating providers may not charge beneficiaries more than the approved amount for their services. Please keep in mind that beneficiaries still have to pay a coinsurance or copayment amount for a visit or service.

Alexa Marzo 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

  • PECOS PAC ID: 6901397876

    What is the PECOS Associate Control ID?
    A PAC ID is a unique 10-digit number assigned to an individual or organization healthcare provider in PECOS. The PAC ID is used to link together all the provider information, like tax identification numbers and organizational names. A PAC ID can be connected to multiple Enrollment IDs if an individual or organization has enrolled in PECOS more than once.

  • PECOS Enrollment ID: I20251118004549

    What is the Provider Enrollment ID?
    The Enrollment ID is a unique alphanumeric 15-digit code assigned to each new provider's PECOS enrollment application. The Enrollment ID is used to link together all the provider enrollment information like enrollment type, state, provider specialty, and reassignment of benefits.

  • Accepts Medicare Assignment? Yes

    What does it mean "accepts medicare assignment"?
    When a provider accepts Medicare assignment, the provider agrees to be paid directly by Medicare and to accept the payment amount approved by Medicare. Additionally, the provider agrees to not bill patients for more than the Medicare deductible and coinsurance amounts.
    A provider who doesn't accept assignment may charge you up to 15% over the Medicare-approved amount. This is known as the limiting charge. You may have to pay this amount, or it may be covered by another insurer.

  • 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

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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 1659831378, we treat the final digit (8) 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 62. The final step is to find the difference between that total and the next multiple of ten (70 - 62 = 8).

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
1
Doubled → 2
Pos 2
6
Unchanged
Pos 3
5
Doubled → 10 → 1 + 0
Pos 4
9
Unchanged
Pos 5
8
Doubled → 16 → 1 + 6
Pos 6
3
Unchanged
Pos 7
1
Doubled → 2
Pos 8
3
Unchanged
Pos 9
7
Doubled → 14 → 1 + 4
Check
8
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 5 → 10 → 1 8 → 16 → 7 1 → 2 7 → 14 → 5

Step 2: Add all digits plus the NPI constant

Add the transformed values, the unchanged digits, and the constant 24.

2 + 6 + 1 + 0 + 9 + 1 + 6 + 3 + 2 + 3 + 1 + 4 + 24 = 62

Step 3: Find the amount needed to reach the next multiple of 10

The next multiple of ten after 62 is 70. The difference is the calculated check digit.

70 - 62 = 8
This NPI is valid
The calculated check digit is 8, which matches the last digit of 1659831378.

Other Providers at the Same Location


The following 20 providers are registered at the same or a nearby location.

Pediatrics
501 6TH AVE S
ST PETERSBURG, FL 33701
Pediatrics
501 6TH AVE S
ST PETERSBURG, FL 33701
Pediatrics
501 6TH AVE S
ST PETERSBURG, FL 33701
Pediatrics
501 6TH AVE S, DEPT 70-6590
ST PETERSBURG, FL 33701
Pediatrics (Pediatric Emergency Medicine)
501 6TH AVE S, DEPT 6941
ST PETERSBURG, FL 33701
Pediatrics (Pediatric Emergency Medicine)
501 6TH AVE S, DEPT 6941
ST PETERSBURG, FL 33701
Nurse Anesthetist, Certified Registered
501 6TH AVE S
ST. PETERSBURG, FL 33701
Nurse Anesthetist, Certified Registered
501 6TH AVE S
ST. PETERSBURG, FL 33701
Pathology (Pediatric Pathology)
501 6TH AVE S
ST PETERSBURG, FL 33701
Nurse Practitioner (Pediatrics)
501 6TH AVE S
ST PETERSBURG, FL 33701
Case Manager/Care Coordinator
501 6TH AVE S
ST PETERSBURG, FL 33701
Speech-Language Pathologist
501 6TH AVE S, #7780
ST PETERSBURG, FL 33701
Speech-Language Pathologist
501 6TH AVE S, #7780
ST PETERSBURG, FL 33701
Physical Therapist (Pediatrics)
501 6TH AVE S
ST PETERSBURG, FL 33701
Pediatrics
501 6TH AVE S
ST PETERSBURG, FL 33701
Anesthesiology (Pediatric Anesthesiology)
501 6TH AVE S
ST PETERSBURG, FL 33701
Pediatrics
501 6TH AVE S, BOX 6941
ST PETERSBURG, FL 33701
Pediatrics (Pediatric Endocrinology)
501 6TH AVE S, BOX 6900
ST PETERSBURG, FL 33701
Developmental Therapist
501 6TH AVE S
SAINT PETERSBURG, FL 33701
Social Worker
501 6TH AVE S
ST PETERSBURG, FL 33701

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1659831378, enumerated as an "individual" on March 20, 2019.

The provider is located at 501 6TH AVE S ST PETERSBURG, FL 33701 and the phone number is (727) 767-4106.

Pediatrics with taxonomy code 2080P0203X and a focus in Pediatric Critical Care Medicine.